Wireless communication system, wireless communication device, and communication method

Abstract

This wireless communication system comprises a first wireless communication device and a second wireless communication device. The first wireless communication device includes a first antenna unit in which there are N layers (N = integer 1 or greater) generated from data and which performs a first operation to transmit A transmission signals (A = integer 2 or greater) generated from the N layers; and a first control unit that controls the operation of the first antenna unit. The second wireless communication device includes: a second antenna unit that performs a second operation to transmit B transmission signals (B = integer 1 or greater and less than A) generated from N layers including data or part of data, or M layers (M = integer 1 or greater and less than N) that are part of the N layers; and a second control unit that controls the operation of the second antenna unit.

Description

Wireless communication system, wireless communication device, and communication method

[0001] The present disclosure relates to a wireless communication system, a wireless communication device, and a communication method.

[0002] For example, Non-Patent Document 1 discloses a wireless communication device connected to an antenna module, as shown in FIG.

[0003] “MIMO elevation toward 6G: Modular massive MIMO in low-frequency bands” IEEE Communications Magazine, pp.52-58, November 2021.

[0004] There is room for further study on a specific configuration for improving the data transmission efficiency of a wireless communication system including a wireless communication device connected to an antenna module.

[0005] Non-limiting embodiments of the present disclosure contribute to providing a wireless communication system, a wireless communication device, and a communication method that enable highly efficient data transmission.

[0006] A wireless communication system according to one aspect of the present disclosure includes a first wireless communication device and a second wireless communication device, wherein the first wireless communication device has N layers (N is an integer greater than or equal to 1) generated from data, a first antenna unit that performs a first operation of transmitting A transmission signals (A is an integer greater than or equal to 2) generated from the N layers, and a first control unit that controls the operation of the first antenna unit, and the second wireless communication device has a second antenna unit that performs a second operation of transmitting B transmission signals (B is an integer greater than or equal to 1 and less than A) generated from the N layers or M layers (M is an integer greater than or equal to 1 and less than N) that are part of the N layers and include the data or a portion of the data, and a second control unit that controls the operation of the second antenna unit.

[0007] A wireless communication device according to one aspect of the present disclosure includes a first antenna unit that performs a first operation of transmitting N layers (N is an integer of 1 or greater) generated from data and A transmission signals (A is an integer of 2 or greater) generated from the N layers; a second antenna unit that performs a second operation of transmitting B transmission signals (B is an integer of 1 or greater and less than A) generated from the N layers or M layers (M is an integer of 1 or greater and N or less) that are part of the N layers and include the data or a portion of the data; and a control unit that controls the operation of the first antenna unit and the second antenna unit.

[0008] A communication method according to one aspect of the present disclosure includes a first wireless communication device having a first antenna unit controlling the first antenna unit to perform a first operation of transmitting A transmission signals (A is an integer of 2 or greater) generated from N layers (N is an integer of 1 or greater) generated from data, and a second wireless communication device having a second antenna unit controlling the second antenna unit to perform a second operation of transmitting B transmission signals (B is an integer of 1 or greater and less than A) generated from the N layers or M layers (M is an integer of 1 or greater and N or less) that are part of the N layers and include the data or a part of the data.

[0009] These comprehensive or specific aspects may be realized as a system, an apparatus, a method, an integrated circuit, a computer program, or a recording medium, or may be realized as any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium.

[0010] According to non-limiting examples of the present disclosure, it is possible to provide a wireless communication system, a wireless communication device, and a communication method that enable highly efficient data transmission.

[0011] Further advantages and benefits of certain aspects of the present disclosure will become apparent from the specification and drawings. Such advantages and / or benefits may be provided by some of the embodiments and features described in the specification and drawings, respectively, but not necessarily all of them may be provided to obtain one or more identical features.

[0012]

[0013] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0014] (First Embodiment) In the first embodiment, a wireless communication system and device will be described.

[0015] 1A1 shows an example of the configuration of a communication device (transmitter / receiver) in this embodiment, such as a base station, an access point, etc. In the following description, this will be referred to as a base station.

[0016] For example, antenna 131A receives a signal transmitted by a terminal that is the communication partner, and obtains received signal 132A. Reception processing unit 133A then receives received signal 132A, processes it for reception, and outputs reception status information 135A and received data 134A.

[0017] The control unit 191A receives control information 190A, received data 134A, and reception status information 135A as input, and outputs a control signal 192A including "control information for the transmission method, control information for the precoding method, control information for the antenna module, etc."

[0018] The transmission processing unit ♭1 of 102A_1 receives the transmission data 101A_1 and the control signal 192A as input, and performs processing such as error correction coding and mapping based on information such as the modulation method and error correction coding method (error correction code, coding rate, etc.) included in the control signal 192A, generates a modulated signal, and outputs the modulated signal ♭1 of 103A_1.

[0019] Therefore, the transmission processing unit ♭u of 102A_u receives the transmission data 101A_u and the control signal 192A as input, and performs processes such as error correction coding and mapping (modulation based on the modulation method) based on information such as the modulation method and error correction coding method (error correction code, coding rate, etc.) included in the control signal 192A, generates a modulated signal, and outputs the modulated signal ♭u of 103A_u. Note that u is an integer between 1 and K inclusive. In this case, K is an integer greater than or equal to 1 or an integer greater than or equal to 2. The modulated signal ♭u of 103A_u can also be considered a mapped signal, a baseband signal.

[0020] The transmission processing unit ♭u (u is an integer between 1 and K) of 102A_u may have the configuration shown in Fig. 1A2. In Fig. 1A2, components that operate in the same manner as in Fig. 1A1 are assigned the same numbers.

[0021] The transmission processing unit 102a in FIG. 1A2 receives the transmission data 101a and the control signal 192A as input, and performs processes such as error correction coding and mapping (modulation based on the modulation method) based on information such as the modulation method and error correction coding method (error correction code, coding rate, etc.) included in the control signal 192A to generate a modulated signal, which is output as a modulated signal ♭u of 103A_u. Note that u is an integer between 1 and K, inclusive. In this case, K is an integer greater than or equal to 1, or an integer greater than or equal to 2. The modulated signal ♭u of 103A_u can also be considered a mapped signal, or a baseband signal.

[0022] The precoding unit 104A in FIG. 1A1 receives as input "modulated signal ♭1 of 103A_1, modulated signal ♭2 of 103A_2, ..., modulated signal ♭K of 103A_K" and a control signal 192A, performs precoding based on the precoding information included in the control signal 192A, and outputs "signal group 1 after precoding of 105A_1_1, signal group 2 after precoding of 105A_1_2, ..., signal group L after precoding of 105A_1_L" and / or "signal group #1 after precoding of 105A_2_1, signal group #2 after precoding of 105A_2_2, ..., signal group #M after precoding of 105A_2_M."

[0023] It is to be noted that not all of "signal group 1 after precoding of 105A_1_1, signal group 2 after precoding of 105A_1_2, ..., signal group L after precoding of 105A_1_L" may be present, and not all of "signal group #1 after precoding of 105A_2_1, signal group #2 after precoding of 105A_2_2, ..., signal group #M after precoding of 105A_2_M" may be present. A specific precoding method in precoding unit 104A will be described later.

[0024] The radio processing unit 1 of 111A_1_1 receives the precoded signal group 1 of 105A_1_1 and the control signal 192A as input, performs processing such as frequency conversion on the precoded signal group 1 of 105A_1_1, and generates and outputs the transmission signal group 1 of 112A_1_1.

[0025] Therefore, the radio processing unit v of 111A_1_v receives the precoded signal group v of 105A_1_v and the control signal 192A as input, performs processing such as frequency conversion on the precoded signal group v of 105A_1_v, and generates and outputs the transmission signal group v of 112A_1_v. Note that v is an integer between 1 and L, and L is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0026] The radio processing unit #1 of 111A_2_1 receives the precoded signal group #1 of 105A_2_1 and the control signal 192A as input, performs processing such as frequency conversion on the precoded signal group #1 of 105A_2_1, and generates and outputs the transmission signal group #1 of 112A_2_1.

[0027] Therefore, the radio processing unit #w of 111A_2_w receives the precoded signal group #w of 105A_2_w and the control signal 192A as input, performs processing such as frequency conversion on the precoded signal group #w of 105A_2_w, and generates and outputs the transmission signal group #w of 112A_2_w. Note that w is an integer between 1 and M, and M is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0028] The first antenna module 1 of 106A_1_1 receives the transmission signal group 1 of 112A_1_1 and the control signal 192A as input, and outputs the transmission signal group 1 of 112A_1_1 as radio waves. Note that the first antenna module 1 of 106A_1_1 may perform beamforming (directivity control) based on the control signal 192A.

[0029] Therefore, the first antenna module v of 106A_1_v receives the transmission signal group v of 112A_1_v and the control signal 192A as input, and outputs the transmission signal group v of 112A_1_v as radio waves. Note that v is an integer between 1 and L, and L is an integer greater than or equal to 1 or an integer greater than or equal to 2. The first antenna module v of 106A_1_v may perform beamforming (directivity control) based on the control signal 192A.

[0030] The second antenna module #1 of 106A_2_1 receives the transmission signal group #1 of 112A_2_1 and the control signal 192A as input, and outputs the transmission signal group #1 of 112A_2_1 as radio waves. Note that the second antenna module #1 of 106A_2_1 may perform beamforming (directivity control) based on the control signal 192A.

[0031] Therefore, the second antenna module #w of 106A_2_w receives the transmission signal group #w of 112A_2_w and the control signal 192A as input, and outputs the transmission signal group #w of 112A_2_w as radio waves. Note that w is an integer between 1 and M, and M is an integer greater than or equal to 1 or an integer greater than or equal to 2. The second antenna module #w of 106A_2_w may perform beamforming (directivity control) based on the control signal 192A.

[0032] In addition, the transmitting antennas "first antenna module v of 106A_1_v, second antenna module #w of 106A_2_w" and the receiving antenna "antenna 131A" may be shared and configured as a "transmitting and receiving antenna module" and a "transmitting and receiving antenna".

[0033] 1A1 , when the base station having the configuration of FIG. 1A1 transmits a modulated signal, the base station transmits the modulated signal from at least one of the first antenna modules v and at least one of the second antenna modules w, and the first antenna module v and the second antenna module w may be elevation antenna modules.

[0034] Fig. 1B shows an example of the configuration of a communication device (transmitter / receiver) according to this embodiment, which is different from Fig. 1A1, such as a base station, an access point, etc. In Fig. 1B, components that operate in the same manner as those in Fig. 1A1 are given the same numbers, and as they have already been explained, some explanations will be omitted.

[0035] For example, antenna 131A receives a signal transmitted by a terminal that is the communication partner, and obtains received signal 132A. Reception processing unit 133A then receives received signal 132A, processes it for reception, and outputs reception status information 135A and received data 134A.

[0036] The control unit 191A receives control information 190A, received data 134A, and reception status information 135A as input, and outputs a control signal 192A including "control information for the transmission method, control information for the precoding method, control information for the antenna module, etc."

[0037] The transmission processing unit ♭1 of 102A_1 receives the transmission data 101A_1 and the control signal 192A as input, and performs processing such as error correction coding and mapping (modulation based on the modulation method) based on information such as the modulation method and error correction coding method (error correction code, coding rate, etc.) included in the control signal 192A, generates a modulated signal, and outputs the modulated signal ♭1 of 103A_1.

[0038] Therefore, the transmission processing unit ♭u of 102A_u receives the transmission data 101A_u and the control signal 192A as input, and performs processes such as error correction coding and mapping (modulation based on the modulation method) based on information such as the modulation method and error correction coding method (error correction code, coding rate, etc.) included in the control signal 192A, generates a modulated signal, and outputs the modulated signal ♭u of 103A_u. Note that u is an integer between 1 and K inclusive. In this case, K is an integer greater than or equal to 1 or an integer greater than or equal to 2. The modulated signal ♭u of 103A_u can also be considered a mapped signal, a baseband signal.

[0039] The transmission processing unit ♭u (u is an integer between 1 and K) of 102A_u may have the configuration shown in Fig. 1A2. In Fig. 1A2, components that operate in the same manner as in Fig. 1A1 are assigned the same numbers.

[0040] The transmission processing unit 102a in FIG. 1A2 receives the transmission data 101a and the control signal 192A as input, and performs processes such as error correction coding and mapping (modulation based on the modulation method) based on information such as the modulation method and error correction coding method (error correction code, coding rate, etc.) included in the control signal 192A to generate a modulated signal, which is output as a modulated signal ♭u of 103A_u. Note that u is an integer between 1 and K, inclusive. In this case, K is an integer greater than or equal to 1, or an integer greater than or equal to 2. The modulated signal ♭u of 103A_u can also be considered a mapped signal, or a baseband signal.

[0041] The signal generating unit 130B in FIG. 1B receives as input "modulated signal ♭1 of 103A_1, modulated signal ♭2 of 103A_2, ..., modulated signal ♭K of 103A_K" and a control signal 192A, and generates a signal group from "modulated signal ♭1 of 103A_1, modulated signal ♭2 of 103A_2, ..., modulated signal ♭K of 103A_K" based on the control signal 192A, and outputs "signal group 1 of 131B_1_1, signal group 2 of 131B_1_2, ..., signal group L of 131B_1_L" and / or "signal group #2 of 131B_2_1, signal group #2 of 131B_2_2, ..., signal group #M of 131B_2_M."

[0042] It is not necessary for all of "signal group 1 of 131B_1_1, signal group 2 of 131B_1_2, ..., signal group L of 131B_1_L" to exist, and it is not necessary for all of "signal group #1 of 131B_2_1, signal group #2 of 131B_2_2, ..., signal group #M of 131B_2_M" to exist.

[0043] The first precoding unit 1 of 132B_1_1 receives signal group 1 of 131B_1_1 and control signal 192A as input, performs precoding on signal group 1 of 131B_1_1 based on the precoding information contained in control signal 192A, and outputs precoded signal group 1 of 133B_1_1.

[0044] Therefore, the first precoding unit v of 132B_1_v receives the signal group v of 131B_1_v and the control signal 192A as input, performs precoding on the signal group v of 131B_1_v based on the precoding information included in the control signal 192A, and outputs the precoded signal group v of 133B_1_v. Note that v is an integer between 1 and L, and L is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0045] The second precoding unit #1 of 132B_2_1 receives the signal group #1 of 131B_2_1 and the control signal 192A as input, performs precoding on the signal group #1 of 131B_2_1 based on the precoding information contained in the control signal 192A, and outputs the precoded signal group #1 of 133B_2_1.

[0046] Therefore, the second precoding unit #w of 132B_2_w receives the signal group #w of 131B_2_w and the control signal 192A as input, performs precoding on the signal group #w of 131B_2_w based on the precoding information included in the control signal 192A, and outputs the precoded signal group #w of 133B_2_w. Note that w is an integer between 1 and M, and M is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0047] Specific precoding methods in the first precoding unit v of 132B_1_v and the second precoding unit #w of 132B_2_w will be described later.

[0048] The radio processing unit 1 of 111A_1_1 receives the precoded signal group 1 of 133B_1_1 and the control signal 192A as input, performs processing such as frequency conversion on the precoded signal group 1 of 133B_1_1, and generates and outputs the transmission signal group 1 of 112A_1_1.

[0049] Therefore, the radio processing unit v of 111A_1_v receives the precoded signal group v of 133B_1_v and the control signal 192A as input, performs processing such as frequency conversion on the precoded signal group v of 133B_1_v, and generates and outputs the transmission signal group v of 112A_1_v. Note that v is an integer between 1 and L, and L is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0050] The radio processing unit #1 of 111A_2_1 receives the precoded signal group #1 of 133B_2_1 and the control signal 192A as input, performs processing such as frequency conversion on the precoded signal group #1 of 133B_2_1, and generates and outputs the transmission signal group #1 of 112A_2_1.

[0051] Therefore, the radio processing unit #w of 111A_2_w receives the precoded signal group #w of 133B_2_w and the control signal 192A as input, performs processing such as frequency conversion on the precoded signal group #w of 133B_2_w, and generates and outputs the transmission signal group #w of 112A_2_w. Note that w is an integer between 1 and M, and M is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0052] The first antenna module 1 of 106A_1_1 receives the transmission signal group 1 of 112A_1_1 and the control signal 192A as input, and outputs the transmission signal group 1 of 112A_1_1 as radio waves. Note that the first antenna module 1 of 106A_1_1 may perform beamforming (directivity control) based on the control signal 192A.

[0053] Therefore, the first antenna module v of 106A_1_v receives the transmission signal group v of 112A_1_v and the control signal 192A as input, and outputs the transmission signal group v of 112A_1_v as radio waves. Note that v is an integer between 1 and L, and L is an integer greater than or equal to 1 or an integer greater than or equal to 2. The first antenna module v of 106A_1_v may perform beamforming (directivity control) based on the control signal 192A.

[0054] The second antenna module #1 of 106A_2_1 receives the transmission signal group #1 of 112A_2_1 and the control signal 192A as input, and outputs the transmission signal group #1 of 112A_2_1 as radio waves. Note that the second antenna module #1 of 106A_2_1 may perform beamforming (directivity control) based on the control signal 192A.

[0055] Therefore, the second antenna module #w of 106A_2_w receives the transmission signal group #w of 112A_2_w and the control signal 192A as input, and outputs the transmission signal group #w of 112A_2_w as radio waves. Note that w is an integer between 1 and M, and M is an integer greater than or equal to 1 or an integer greater than or equal to 2. The second antenna module #w of 106A_2_w may perform beamforming (directivity control) based on the control signal 192A.

[0056] In addition, the transmitting antennas "first antenna module v of 106A_1_v, second antenna module #w of 106A_2_w" and the receiving antenna "antenna 131A" may be shared and configured as a "transmitting and receiving antenna module" and a "transmitting and receiving antenna".

[0057] 1B , when the base station transmits a modulated signal, the base station transmits the modulated signal from at least one of the first antenna modules v and at least one of the second antenna modules w, and the first antenna module v and the second antenna module w may be elevation antenna modules.

[0058] 1A1, 1B, etc. and the following description, the term "antenna module" may be interchangeable with other terms such as "antenna section," "antenna," or "antenna unit." Also, in FIGS. 1A1, 1B, etc. and the following description, at least one of the components of the transmission processing section, precoding section, radio processing section, reception processing section, etc. included in the communication device may be considered as an example of a control section or a processing section, or may be included in the control section or the processing section. The control section may be referred to as a control circuit, and the processing section may be referred to as a processing circuit.

[0059] The "first antenna module v of 106A_1_v, second antenna module #w of 106A_2_w" in FIGS. 1A1 and 1B may include one or more antennas, or two or more antennas. In this case, each antenna constituting the "first antenna module v of 106A_1_v, second antenna module #w of 106A_2_w" may have a configuration as shown in FIG. 1C1 and be capable of beamforming (directivity control). However, the configuration of each antenna constituting the "first antenna module v of 106A_1_v, second antenna module #w of 106A_2_w" is not limited to this. For example, each antenna constituting the "first antenna module v of 106A_1_v, second antenna module #w of 106A_2_w" may be composed of a single antenna.

[0060] 1C1 shows an example of the configuration of the antennas provided in the "first antenna module v of 106A_1_v and second antenna module #w of 106A_2_w" in FIGS. 1A1 and 1B. Note that v is an integer between 1 and L, and w is an integer between 1 and M. However, the number of antennas constituting the antennas provided in the "first antenna module v of 106A_1_v and second antenna module #w of 106A_2_w" is not limited to four, and may be one or more.

[0061] The distribution unit 152C receives input signal 151C, which corresponds to the "signal constituting the transmission signal group v of 112A_1_v" and the "signal constituting the transmission signal group #w of 112A_2_w" in Figures 1A1 and 1B, distributes it, and outputs signals 153C_1, 153C_2, 153C_3, and 153C_4.

[0062] Multiplication unit 154C_1 receives signal 153C_1 and control signal 150C as input, multiplies signal 153C_1 by a multiplication coefficient based on control signal 150C, generates and outputs coefficient-multiplied signal 155C_1. Coefficient-multiplied signal 155C_1 is then output as a radio wave from antenna 156C_1. Note that control signal 150C corresponds to, for example, control signal 192A in FIGS. 1A1 and 1B.

[0063] A more specific explanation will be given. Signal 153C_1 is represented as tp1(t). Here, t is time. If the multiplication coefficient is w1, then signal 155C_1 after coefficient multiplication can be represented as tp1(t)×w1. Note that tp1(t) can be represented by a complex number, and therefore may be a real number. Furthermore, w1 can be represented by a complex number, and therefore may be a real number.

[0064] Multiplication unit 154C_2 receives signal 153C_2 and control signal 150C as input, multiplies signal 153C_2 by a multiplication coefficient based on control signal 150C, generates and outputs coefficient-multiplied signal 155C_2. Coefficient-multiplied signal 155C_2 is then output as a radio wave from antenna 156C_2. Note that control signal 150C corresponds to, for example, control signal 192A in FIGS. 1A1 and 1B.

[0065] A more specific explanation will be given. Let us denote signal 153C_2 as tp2(t), where t is time. If the multiplication coefficient is w2, then signal 155C_2 after coefficient multiplication can be expressed as tp2(t)×w2. Note that tp2(t) can be expressed as a complex number, and therefore may be a real number. Also, w2 can be expressed as a complex number, and therefore may be a real number.

[0066] Multiplication unit 154C_3 receives signal 153C_3 and control signal 150C as input, multiplies signal 153C_3 by a multiplication coefficient based on control signal 150C, generates and outputs coefficient-multiplied signal 155C_3. Coefficient-multiplied signal 155C_3 is then output as a radio wave from antenna 156C_3. Note that control signal 150C corresponds to, for example, control signal 192A in FIGS. 1A1 and 1B.

[0067] A more specific explanation will be given. Let us denote signal 153C_3 as tp3(t), where t is time. If the multiplication coefficient is w3, then signal 155C_3 after coefficient multiplication can be expressed as tp3(t)×w3. Note that tp3(t) can be expressed as a complex number, and therefore may be a real number. Also, w3 can be expressed as a complex number, and therefore may be a real number.

[0068] Multiplication unit 154C_4 receives signal 153C_4 and control signal 150C as input, multiplies signal 153C_4 by a multiplication coefficient based on control signal 150C, generates and outputs coefficient-multiplied signal 155C_4. Coefficient-multiplied signal 155C_4 is then output as a radio wave from antenna 156C_4. Note that control signal 150C corresponds to, for example, control signal 192A in FIGS. 1A1 and 1B.

[0069] A more specific explanation will be given. Let us denote signal 153C_4 as tp4(t), where t is time. If the multiplication coefficient is w4, then signal 155C_4 after coefficient multiplication can be expressed as tp4(t)×w4. Note that tp4(t) can be expressed as a complex number, and therefore may be a real number. Also, w4 can be expressed as a complex number, and therefore may be a real number.

[0070] It should be noted that the absolute values ​​of w1, w2, w3, and w4 may be equal to each other. This is equivalent to a phase change. Naturally, the absolute values ​​of w1, w2, w3, and w4 do not have to be equal to each other.

[0071] The values ​​of w1, w2, w3, and w4 are set based on a control signal 150 C. Note that the values ​​of w1, w2, w3, and w4 may be switchable.

[0072] The "first antenna module v of 106A_1_v and the second antenna module #w of 106A_2_w" in FIGS. 1A1 and 1B may have a plurality of "portions configured as in FIG. 1C1." In this case, the "first antenna module v of 106A_1_v" in FIGS. 1A1 and 1B will have a plurality of configurations as in FIG. 1C1, and the "second antenna module #w of 106A_2_w" in FIGS. 1A1 and 1B will have a plurality of configurations as in FIG. 1C1. This allows the first antenna module v of 106A_1_v in FIGS. 1A1 and 1B to transmit a plurality of transmission signals, and the second antenna module #w of 106A_2_w in FIGS. 1A1 and 1B to transmit a plurality of transmission signals.

[0073] 1A1 and 1B, the "first antenna module v of 106A_1_v, the second antenna module #w of 106A_2_w" may include one or more antennas, or two or more antennas. In this case, each antenna constituting the "first antenna module v of 106A_1_v, the second antenna module #w of 106A_2_w" may have a configuration as shown in FIG. 1C2 and may be capable of beamforming (directivity control).

[0074] 1C2 shows an example of the configuration of the antennas provided in the "first antenna module v of 106A_1_v and second antenna module #w of 106A_2_w" in FIGS. 1A1 and 1B. Note that v is an integer between 1 and L, and w is an integer between 1 and M. In FIG. 1C2, components that operate in the same manner as in FIG. 1C1 are assigned the same numbers, and some descriptions will be omitted.

[0075] Multiplication unit 154C_1 receives signal 153C_1 and control signal 150C as input, multiplies signal 153C_1 by a multiplication coefficient based on control signal 150C, generates coefficient-multiplied signal 155C_1, and outputs it. Coefficient-multiplied signal 155C_1 is then output as a radio wave from antenna 156C_1. Note that control signal 150C corresponds to, for example, control signal 192A in FIGS. 1A1 and 1B, and signal 153C_1 corresponds to "signals constituting transmission signal group v of 112A_1_v" and "signals constituting transmission signal group #w of 112A_2_w" in FIGS. 1A1 and 1B.

[0076] A more specific explanation will be given. The signal 153C_1 is represented as tp1(t). t represents time. If the multiplication coefficient is w1, the signal 155C_1 after coefficient multiplication can be represented as tp1(t)×w1. tp1(t) can be represented as a complex number and therefore may be a real number. Furthermore, w1 can be represented as a complex number and therefore may be a real number. The value of w1 is set based on the control signal 150C. The value of w1 may be switchable.

[0077] The "first antenna module v of 106A_1_v and the second antenna module #w of 106A_2_w" in Figures 1A1 and 1B may have a plurality of "portions configured as in Figure 1C2." In this case, the "first antenna module v of 106A_1_v" in Figures 1A1 and 1B will have a plurality of configurations as in Figure 1C2, and the "second antenna module #w of 106A_2_w" in Figures 1A1 and 1B will have a plurality of configurations as in Figure 1C2. This allows the first antenna module v of 106A_1_v in Figures 1A1 and 1B to transmit a plurality of transmission signals, and the second antenna module #w of 106A_2_w in Figures 1A1 and 1B to transmit a plurality of transmission signals.

[0078] 2 shows the configuration of a terminal that is a communication partner of a base station having the configurations of FIGS. 1A1 and 1B, for example. A transmitter 202 receives transmission data 201, a control signal 290, and reception data 224 as input, determines a transmission method based on the control signal 290 and reception data 224, performs error correction coding, modulation, frequency conversion, etc. on the transmission data 201, generates one or more transmission signals, and outputs a group of transmission signals 203. The group of transmission signals 203 is then output as radio waves from a group of antennas 204. Note that the group of antennas 204 is composed of one or more antennas.

[0079] The receiving unit 223 receives the received signal group 222 received by the antenna group 221 and the control signal 290 as input, and performs processing such as frequency conversion, demodulation, and decoding of error correction codes on the received signal group 222 based on the control signal 290, and outputs received data 224. The antenna group 221 is one or more antennas, and the received signal group 222 is made up of one or more received signals.

[0080] FIG. 3 shows the state of a "base station having the configurations of FIGS. 1A1 and 1B" and a "terminal having the configuration of FIG. 2."

[0081] It is assumed that the base station #1 of 301_1 having the configuration of FIGS. 1A1 and 1B is communicating with "terminal #1 of 302_1, terminal #2 of 302_2, and terminal #3 of 302_3" having the configuration of FIG.

[0082] In this way, the base station communicates with one or more terminals. Note that, although Fig. 3 shows an example in which the base station communicates with three terminals, the number of terminals with which the base station communicates is not limited to three.

[0083] Therefore, the transmission data 101A_u in Figures 1A and 1B of the base station #1 of 301_1 having the configuration of Figures 1A1 and 1B includes data addressed to each terminal. Also, when the base station #1 of 301_1 has the configuration of Figure 1A2B, the transmission data 101a includes data addressed to each terminal.

[0084] In base station #1 of 301_1 having the configuration of Figure 1A1, the transmission processing unit ♭u of 102A_u, the precoding unit 104A, the radio processing unit v of 111A_1_v, and the first antenna module v of 106A_1_v are configured to be able to communicate with one or more terminals.

[0085] In base station #1 of 301_1 having the configuration of Figure 1B, the transmission processing unit ♭u of 102A_u, the signal generating unit 130B, the first precoding unit v of 132B_1_v, the radio processing unit v of 111A_1_v, and the first antenna module v of 106A_1_v are configured to be able to communicate with one or more terminals.

[0086] In the base station #1 of 301_1 having the configuration of FIGS. 1A1 and 1B, the antenna 131A and the reception processing unit 133A are configured to be able to communicate with one or more terminals.

[0087] In the following explanation, an example will be given in which base station #1 of 301_1 is communicating with terminal #1 of 302_1. In this case, "base station #1 of 301_1" will be called "base station" and "terminal #1 of 302_1" will be called "terminal."

[0088] 1A1 and 1B, the "modulated signal ♭u of 103A_u" is a signal (or a baseband signal) after mapping using a modulation method, and the "modulated signal ♭u of 103A_u" may also be called a "stream ♭u" or a "layer ♭u." Note that u is an integer between 1 and K. In this case, K is an integer greater than or equal to 1, or an integer greater than or equal to 2.

[0089] 4 shows an example of the arrangement of "modulated signal ♭u of 103A_u" on the time-frequency axis. As shown in FIG. 4, "modulated signal ♭u of 103A_u" is included in the signal at frequency AA1 and time A1. "modulated signal ♭u of 103A_u" exists at the same (common) frequency and the same (common) time. Therefore, "modulated signal ♭u of 103A_u" is transmitted using a MIMO (Multiple-Input Multiple-Output) system or a MISO (Multiple-Input Single-Output) system.

[0090] Therefore, if a signal exists in the transmission signal group v of 112A_1_v, it exists at frequency AA1 and time A1. Also, if a signal exists in the transmission signal group #w of 112A_2_w, it exists at frequency AA1 and time A1.

[0091] Hereinafter, the differences between the first antenna module and the second antenna module in FIG. 1A1 will be described using an example.

[0092] In FIG. 1A1, two or more signals exist in the "modulation signal ♭u of 103A_u" (u is an integer between 1 and K, inclusive, where K is an integer greater than or equal to 1, or an integer greater than or equal to 2). In this case, the number of existing signals is F. (Therefore, F is an integer greater than or equal to 2.)

[0093] For example, if two signals exist in the "modulation signal ♭u of 103A_u," then there exists a modulation signal ♭1 of 103A_1 and a modulation signal ♭2 of 103A_2.

[0094] First Antenna Module Related: Then, the number of "modulated signals ♭u of 103A_u" included in the signal group v after precoding of 105A_1_v in FIG. 1A1 is F or 0. Note that v is an integer between 1 and L, and L is an integer greater than or equal to 1 or an integer greater than or equal to 2. (In this case, when the number of "modulated signals ♭u of 103A_u" included in the signal group v after precoding of 105A_1_v is 0, it means that no signal is present.)

[0095] Related to the second antenna module: The number of "modulated signals ♭u of 103A_u" included in the signal group #w after precoding of 105A_2_w in FIG. 1A1 is an integer less than F (an integer equal to or less than F-1). Note that w is an integer between 1 and M, and M is an integer equal to or greater than 1 or an integer equal to or greater than 2. (In this case, when the number of "modulated signals ♭u of 103A_u" included in the signal group #w after precoding of 105A_2_w in FIG. 1A1 is 0, this means that no signal is present.) However, although several alternative explanations are provided below, if these alternative explanations are implemented, the number of "modulated signals ♭u of 103A_u" included in the signal group #w after precoding of 105A_2_w in FIG. 1A1 may be F.

[0096] First Antenna Module Related: Therefore, the number of "modulated signals ♭u of 103A_u" included in the group of transmitted signals v of 112A_1_v in FIG. 1A1 is F or 0. Note that v is an integer between 1 and L, and L is an integer greater than or equal to 1, or an integer greater than or equal to 2. (In this case, when the number of "modulated signals ♭u of 103A_u" included in the group of transmitted signals v of 112A_1_v is 0, it means that no signal is present.)

[0097] Related to the second antenna module: The number of "modulated signals ♭u of 103A_u" included in the group of transmission signals #w of 112A_2_w in FIG. 1A1 is an integer between 0 and F (an integer between 0 and F-1). Note that w is an integer between 1 and M, and M is an integer between 1 and M, or an integer between 2 and 1. (In this case, when the number of "modulated signals ♭u of 103A_u" included in the group of transmission signals #w of 112A_2_w in FIG. 1A1 is 0, this means that no signal is present.) However, although several alternative explanations are provided below, if these alternative explanations are implemented, the number of "modulated signals ♭u of 103A_u" included in the group of transmission signals #w of 112A_2_w in FIG. 1A1 may be F.

[0098] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0099] Also, for example, upper limit values ​​B1max and B2max are set for the number of modulated signals (modulated signal ♭u of 103A_u) included in the transmission signal groups (transmission signal group v of 112A_1_v, transmission signal group #w of 112A_2_w). Note that B1max is an integer equal to or greater than 2, and B2max is an integer equal to or greater than 1, and B1max > B2max is established. In this case, the upper limit value for the number of modulated signals included in the transmission signal transmitted from the first antenna module is set to B1max, and the upper limit value for the number of modulated signals included in the transmission signal transmitted from the second antenna module is set to B2max. In this way, a similar effect can be obtained.

[0100] The above will be explained with a focus on precoding.

[0101] First Antenna Module Related: The number of "modulated signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v in FIG. 1A1 is F or 0. Note that v is an integer between 1 and L, and L is an integer greater than or equal to 1 or an integer greater than or equal to 2. Therefore, in the transmission signal group v of 112A_1_v that includes signals, the transmission signal group v of 112A_1_v includes F or more signals.

[0102] In "modulation signal ♭u of 103A_u", the signal that exists is F, so the F signals are represented as Tx_1_i(t,f). Note that i is an integer between 1 and F, t represents time, and f represents frequency. In this case, vector s1(t,f) = (Tx_1_1(t,f), Tx_1_2(t,f), ..., Tx_1_F(t,f)). Ｔ Here, if A is a vector, then A Ｔ is the transposed vector of vector A. Also, if A is a matrix, A Ｔ is the transposed matrix of matrix A.

[0103] It is assumed that the signal group v after precoding of 105A_1_v where a signal exists includes Pv signals. These Pv signals are represented as Rx_1_v,k(t,f). Note that k is an integer between 1 and Pv, inclusive. However, Pv is an integer greater than or equal to 1. In this case, the vector r1v(t,f)=(Rx_1_v,1(t,f), Rx_1_v,2(t,f), ..., Rx_1_v,Pv(t,f)) Ｔ Let's say.

[0104] Then, r1v(t, f)=Xv×s1(t, f) holds, where Xv is a precoding matrix and is a matrix with F rows and Pv columns.

[0105] Related to the second antenna module: The number of "modulated signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w in FIG. 1A1 is an integer less than F (an integer equal to or less than F-1). Note that w is an integer equal to or greater than 1 and equal to or less than M, and M is an integer equal to or greater than 1, or an integer equal to or greater than 2. Therefore, in the transmission signal group #w of 112A_2_w in FIG. 1A1 that includes signals, the transmission signal group #w of 112A_2_w in FIG. 1A1 includes F-1 or more signals.

[0106] The number of "modulated signals ♭u of 103A_u" included in signal group #w after precoding of 105A_2_w in FIG. 1A1 is an integer less than F (an integer equal to or less than F-1). In this case, the number of "modulated signals ♭u of 103A_u" included in signal group #w after precoding of 105A_2_w is set to Gw. Note that Gw is an integer equal to or greater than 0 and less than F (an integer equal to or greater than 0 and less than F-1). These Gw signals are represented as Tx_2_i(t,f). Note that i is an integer equal to or greater than 1 and less than Gw, t represents time, and f represents frequency. In this case, vector s2w(t,f) = (Tx_2_1(t,f), Tx_2_2(t,f), ..., Tx_2_Gw(t,f)) Ｔ Let's say.

[0107] It is assumed that the signal group #w after precoding of 105A_2_w includes Qw signals. These Qw signals are represented as Rx_2_w,k(t,f). Note that k is an integer between 1 and Qw, inclusive. However, Qw is an integer greater than or equal to 1. In this case, the vector r2w(t,f)=(Rx_2_w,1(t,f), Rx_2_w,2(t,f), ..., Rx_2_w,Qw(t,f)). Ｔ Let's say.

[0108] Then, r2w(t, f)=Yw×s2w(t, f) holds, where Yw is a precoding matrix and is a matrix with Gw rows and Qw columns.

[0109] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0110] The "precoding matrix Xv used in association with the first antenna module" is selected from a plurality of precoding matrices, which are referred to as a first precoding matrix group.

[0111] The "precoding matrix Yw used in association with the second antenna module" is selected from a plurality of precoding matrices, which are referred to as a second precoding matrix group.

[0112] In this case, there is no identical precoding matrix between the first precoding matrix group and the second precoding matrix group.

[0113] As described above, the number of rows of the precoding matrices included in the first precoding matrix group is F, the number of rows of the precoding matrices included in the second precoding matrix group is Gw, and F≠Gw holds.

[0114] Furthermore, the modulated signal where u=C (modulated signal ♭C of 103A_C) may be transmitted from "one or more first antenna modules and one or more second antenna modules."

[0115] Another example will now be described.

[0116] 1A1, a first antenna module v of 106A_1_v that transmits a group of transmission signals is focused on. When the number of transmission signals included in the group of transmission signals v of 112A_1_v transmitted from this first antenna module v of 106A_1_v is defined as Hv, the minimum value of Hv is defined as Hmin, where v is an integer between 1 and L.

[0117] 1A1, the second antenna module #w of 106A_2_w that transmits the transmission signal group will be focused on. When the number of transmission signals included in the transmission signal group #w of 112A_2_w transmitted from this second antenna module #w of 106A_2_w is Iw, w is an integer between 1 and M, and the maximum value of Iw is Imax.

[0118] In this case, it is assumed that Hmin>Imax holds. By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal that is the communication partner of the base station, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0119] In addition, the number of "modulated signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v and the number of "modulated signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w do not have to satisfy the conditions described above.

[0120] Furthermore, when the number of antennas constituting the first antenna module v of 106A_1_v in FIG. 1A1 is Jv, v is an integer between 1 and L, and the minimum value of Jv is Jmin.

[0121] When the number of antennas constituting the second antenna module #w of 106A_2_w in FIG. 1A1 is Kw, w is an integer between 1 and M, and the maximum value of Kw is Kmax.

[0122] In this case, it is assumed that Jmin>Kmax holds. By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal that is the communication partner of the base station, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0123] In addition, the number of "modulated signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v and the number of "modulated signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w do not have to satisfy the conditions described above.

[0124] The second antenna module may have a non-uniform antenna shape, and the first antenna module may be an antenna for FD (Full Dimension)-MIMO.

[0125] A limit may be placed on the number of antennas constituting the first antenna module and the number of antennas constituting the second antenna module.

[0126] For example, upper limits L1max and L2max are set for the number of antennas, where L1max is an integer equal to or greater than 2 and L2max is an integer equal to or greater than 1, and L1max > L2max holds. The upper limit for the number of antennas constituting the first antenna module may be set to L1max, and the upper limit for the number of antennas constituting the second antenna module may be set to L2max.

[0127] The above will be explained below with an example.

[0128] In FIG. 1A1, it is assumed that there are two modulated signals (two streams, two layers): "modulated signal ♭1 of 103A_1" and "modulated signal ♭2 of 103A_2."

[0129] Related to the first antenna module: Then, when v is an integer between 1 and L, and L is an integer greater than or equal to 1 or greater than or equal to 2, if the signal group v after precoding of 105A_1_v in Figure 1A1 exists as a signal, the number of "modulated signals ♭u of 103A_u" included in the signal group v after precoding of 105A_1_v is 2.

[0130] Related to the second antenna module: When w is an integer between 1 and M, and M is an integer greater than or equal to 1 or greater than 2, if the signal group #w after precoding of 105A_2_w in FIG. 1A1 exists as a signal, the number of "modulated signals ♭u of 103A_u" included in the signal group #w after precoding of 105A_2_w is 1. However, although some alternative explanations are provided below, when these alternative explanations are implemented, the number of "modulated signals ♭u of 103A_u" included in the signal group #w after precoding of 105A_2_w in FIG. 1A1 may be 2.

[0131] Related to the first antenna module: Therefore, when v is an integer greater than or equal to 1 and less than or equal to L, and L is an integer greater than or equal to 1 or an integer greater than or equal to 2, if the transmission signal group v of 112A_1_v in Figure 1A1 exists as a signal, the number of "modulation signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v will be 2.

[0132] Related to the second antenna module: When w is an integer between 1 and M, and M is an integer greater than or equal to 1 or greater than 2, if the transmission signal group #w of 112A_2_w in Fig. 1A1 exists as a signal, the number of "modulation signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w in Fig. 1A1 is 1. However, although some alternative explanations are provided below, if these alternative explanations are implemented, the number of "modulation signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w in Fig. 1A1 may be 2.

[0133] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0134] Furthermore, for example, upper limit values ​​B1max and B2max are set for the number of modulated signals (modulated signal ♭u of 103A_u) included in the transmission signal groups (transmission signal group v of 112A_1_v, transmission signal group #w of 112A_2_w). Note that B1max is set to 2 and B2max is set to 1, so that B1max > B2max holds. In this case, the upper limit value for the number of modulated signals included in the transmission signal transmitted from the first antenna module is set to B1max, and the upper limit value for the number of modulated signals included in the transmission signal transmitted from the second antenna module is set to B2max. In this way, a similar effect can be obtained.

[0135] The above will be explained with a focus on precoding.

[0136] First Antenna Module Related: When v is an integer between 1 and L, and L is an integer greater than or equal to 1 or greater than or equal to 2, if the transmission signal group v of 112A_1_v in FIG. 1A1 exists as a signal, the transmission signal group v of 112A_1_v includes two or more signals.

[0137] In the "modulation signal ♭u of 103A_u", there are two signals, so the two signals are represented as Tx_1_i(t,f). Note that i is an integer between 1 and 2, t represents time, and f represents frequency. In this case, the vector s1(t,f) = (Tx_1_1(t,f), Tx_1_2(t,f)). Ｔ Let's say.

[0138] It is assumed that the signal group v after precoding of 105A_1_v where a signal exists includes Pv signals. These Pv signals are represented as Rx_1_v,k(t,f). Note that k is an integer between 1 and Pv, inclusive. However, Pv is an integer greater than or equal to 1. In this case, the vector r1v(t,f)=(Rx_1_v,1(t,f), Rx_1_v,2(t,f), ..., Rx_1_v,Pv(t,f)) Ｔ Let's say.

[0139] Then, r1v(t, f)=Xv×s1(t, f) holds, where Xv is a precoding matrix and is a matrix with 2 rows and Pv columns.

[0140] Related to the second antenna module: When w is an integer between 1 and M, and M is an integer greater than or equal to 1 or greater than or equal to 2, if the transmission signal group #w of 112A_2_w in FIG. 1A1 exists as a signal, the transmission signal group #w of 112A_2_w in FIG. 1A1 includes one or more signals.

[0141] The number of "modulated signals ♭u of 103A_u" included in the signal group #w after precoding of 105A_2_w in FIG. 1A1 is 1, and this signal is represented as Tx_2_1(t,f). In this case, vector s2w(t,f)=(Tx_2_1(t,f)) Ｔ Let's say.

[0142] It is assumed that the signal group #w after precoding of 105A_2_w includes Qw signals. These Qw signals are represented as Rx_2_w,k(t,f). Note that k is an integer between 1 and Qw, inclusive. However, Qw is an integer greater than or equal to 1. In this case, the vector r2w(t,f)=(Rx_2_w,1(t,f), Rx_2_w,2(t,f), ..., Rx_2_w,Qw(t,f)). Ｔ Let's say.

[0143] Then, r2w(t, f)=Yw×s2w(t, f) holds, where Yw is a precoding matrix and is a matrix with 1 row and Qw columns.

[0144] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0145] The "precoding matrix Xv used in association with the first antenna module" is selected from a plurality of precoding matrices, which are referred to as a first precoding matrix group.

[0146] The "precoding matrix Yw used in association with the second antenna module" is selected from a plurality of precoding matrices, which are referred to as a second precoding matrix group.

[0147] In this case, there is no identical precoding matrix between the first precoding matrix group and the second precoding matrix group.

[0148] This is because, as described above, the number of rows of the precoding matrices included in the first precoding matrix group is two, and the number of rows of the precoding matrix included in the second precoding matrix group is one.

[0149] Furthermore, the modulated signal where u=C (modulated signal ♭C of 103A_C) may be transmitted from "one or more first antenna modules and one or more second antenna modules."

[0150] Another example will now be described.

[0151] 1A1, the first antenna module v of 106A_1_v that transmits the group of transmission signals is focused on. When the number of transmission signals included in the group of transmission signals v of 112A_1_v transmitted from this first antenna module v of 106A_1_v is Hv, v is an integer between 1 and L, and the minimum value of Hv is Hmin.

[0152] 1A1, the second antenna module #w of 106A_2_w that transmits the transmission signal group will be focused on. When the number of transmission signals included in the transmission signal group #w of 112A_2_w transmitted from this second antenna module #w of 106A_2_w is Iw, w is an integer between 1 and M, and the maximum value of Iw is Imax.

[0153] In this case, it is assumed that Hmin>Imax holds. By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal that is the communication partner of the base station, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0154] In addition, the number of "modulated signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v and the number of "modulated signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w do not have to satisfy the conditions described above.

[0155] Furthermore, when the number of antennas constituting the first antenna module v of 106A_1_v in FIG. 1A1 is Jv, v is an integer between 1 and L, and the minimum value of Jv is Jmin.

[0156] When the number of antennas constituting the second antenna module #w of 106A_2_w in FIG. 1A1 is Kw, w is an integer between 1 and M, and the maximum value of Kw is Kmax.

[0157] In this case, it is assumed that Jmin>Kmax holds. By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal that is the communication partner of the base station, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0158] In addition, the number of "modulated signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v and the number of "modulated signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w do not have to satisfy the conditions described above.

[0159] The second antenna module may have a non-uniform antenna shape, and the first antenna module may be an antenna for FD (Full Dimension)-MIMO.

[0160] A limit may be placed on the number of antennas constituting the first antenna module and the number of antennas constituting the second antenna module.

[0161] For example, upper limits L1max and L2max are set for the number of antennas, where L1max is an integer equal to or greater than 2 and L2max is an integer equal to or greater than 1, and L1max > L2max holds. The upper limit for the number of antennas constituting the first antenna module may be set to L1max, and the upper limit for the number of antennas constituting the second antenna module may be set to L2max.

[0162] 1A1, it is assumed that there are four modulated signals (four streams, four layers): "modulated signal ♭1 of 103A_1," "modulated signal ♭2 of 103A_2," "modulated signal ♭3 of 103A_3," and "modulated signal ♭4 of 103A_4."

[0163] Related to the first antenna module: Then, when v is an integer between 1 and L, and L is an integer greater than or equal to 1 or greater than or equal to 2, if the signal group v after precoding of 105A_1_v in Figure 1A1 exists as a signal, the number of "modulated signals ♭u of 103A_u" included in the signal group v after precoding of 105A_1_v is 4.

[0164] Related to the second antenna module: When w is an integer between 1 and M, and M is an integer greater than or equal to 1 or greater than 2, if the signal group #w after precoding of 105A_2_w in FIG. 1A1 exists as a signal, the number of "modulated signals ♭u of 103A_u" included in the signal group #w after precoding of 105A_2_w will be 1, 2, or 3. However, although some alternative explanations are provided below, when these alternative explanations are implemented, the number of "modulated signals ♭u of 103A_u" included in the signal group #w after precoding of 105A_2_w in FIG. 1A1 may be 4.

[0165] Related to the first antenna module: Therefore, when v is an integer greater than or equal to 1 and less than or equal to L, and L is an integer greater than or equal to 1 or an integer greater than or equal to 2, if the transmission signal group v of 112A_1_v in Figure 1A1 exists as a signal, the number of "modulation signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v will be 4.

[0166] Related to the second antenna module: Then, when w is an integer between 1 and M inclusive, and M is an integer greater than or equal to 1 or greater than 2, if the transmission signal group #w of 112A_2_w in Fig. 1A1 exists as a signal, the number of "modulation signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w in Fig. 1A1 will be either 1, 2, or 3. However, although several alternative explanations are provided below, if these alternative explanations are implemented, the number of "modulation signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w in Fig. 1A1 may be 4.

[0167] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0168] Furthermore, for example, upper limit values ​​B1max and B2max are set for the number of modulated signals (modulated signal ♭u of 103A_u) included in the transmission signal groups (transmission signal group v of 112A_1_v, transmission signal group #w of 112A_2_w). Note that B1max is set to 2 and B2max is set to 1, so that B1max > B2max holds. In this case, the upper limit value for the number of modulated signals included in the transmission signal transmitted from the first antenna module is set to B1max, and the upper limit value for the number of modulated signals included in the transmission signal transmitted from the second antenna module is set to B2max. In this way, a similar effect can be obtained.

[0169] The above will be explained with a focus on precoding.

[0170] First Antenna Module Related: When v is an integer between 1 and L, and L is an integer greater than or equal to 1 or greater than or equal to 2, if the transmission signal group v of 112A_1_v in FIG. 1A1 exists as a signal, the transmission signal group v of 112A_1_v includes four or more signals.

[0171] In "modulation signal ♭u of 103A_u", there are four signals, so the four signals are represented as Tx_1_i(t,f). Note that i is an integer between 1 and 4, t represents time, and f represents frequency. In this case, vector s1(t,f) = (Tx_1_1(t,f), Tx_1_2(t,f), Tx_1_3(t,f), Tx_1_4(t,f)). Ｔ Let's say.

[0172] It is assumed that the signal group v after precoding of 105A_1_v where a signal exists includes Pv signals. These Pv signals are represented as Rx_1_v,k(t,f). Note that k is an integer between 1 and Pv, inclusive. However, Pv is an integer greater than or equal to 1. In this case, the vector r1v(t,f)=(Rx_1_v,1(t,f), Rx_1_v,2(t,f), ..., Rx_1_v,Pv(t,f)) Ｔ Let's say.

[0173] Then, r1v(t, f)=Xv×s1(t, f) holds, where Xv is a precoding matrix and is a matrix with 4 rows and Pv columns.

[0174] Related to the second antenna module: When w is an integer between 1 and M, and M is an integer greater than or equal to 1 or greater than or equal to 2, if the transmission signal group #w of 112A_2_w in FIG. 1A1 exists as a signal, the transmission signal group #w of 112A_2_w in FIG. 1A1 includes three or more signals.

[0175] The number of "modulated signals ♭u of 103A_u" included in signal group #w after precoding of 105A_2_w in FIG. 1A1 is an integer of 3 or less. In this case, the number of "modulated signals ♭u of 103A_u" included in signal group #w after precoding of 105A_2_w is set to Gw. Gw is an integer between 0 and 3. These Gw signals are represented as Tx_2_i(t,f). i is an integer between 1 and Gw, t represents time, and f represents frequency. In this case, vector s2w(t,f) = (Tx_2_1(t,f), Tx_2_2(t,f), ..., Tx_2_Gw(t,f)) Ｔ Let's say.

[0176] It is assumed that the signal group #w after precoding of 105A_2_w includes Qw signals. These Qw signals are represented as Rx_2_w,k(t,f). Note that k is an integer between 1 and Qw, inclusive. However, Qw is an integer greater than or equal to 1. In this case, the vector r2w(t,f)=(Rx_2_w,1(t,f), Rx_2_w,2(t,f), ..., Rx_2_w,Qw(t,f)). Ｔ Let's say.

[0177] Then, r2w(t, f)=Yw×s2w(t, f) holds, where Yw is a precoding matrix and is a matrix with Gw rows and Qw columns.

[0178] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0179] The "precoding matrix Xv used in association with the first antenna module" is selected from a plurality of precoding matrices, which are referred to as a first precoding matrix group.

[0180] The "precoding matrix Yw used in association with the second antenna module" is selected from a plurality of precoding matrices, which are referred to as a second precoding matrix group.

[0181] In this case, there is no identical precoding matrix between the first precoding matrix group and the second precoding matrix group.

[0182] This is because, as described above, the number of rows of the precoding matrices included in the first precoding matrix group is 4, and the number of rows of the precoding matrices included in the second precoding matrix group is Gw.

[0183] Furthermore, the modulated signal where u=C (modulated signal ♭C of 103A_C) may be transmitted from "one or more first antenna modules and one or more second antenna modules."

[0184] Another example will now be described.

[0185] 1A1, the first antenna module v of 106A_1_v that transmits the group of transmission signals is focused on. When the number of transmission signals included in the group of transmission signals v of 112A_1_v transmitted from this first antenna module v of 106A_1_v is Hv, v is an integer between 1 and L, and the minimum value of Hv is Hmin.

[0186] 1A1, the second antenna module #w of 106A_2_w that transmits the transmission signal group will be focused on. When the number of transmission signals included in the transmission signal group #w of 112A_2_w transmitted from this second antenna module #w of 106A_2_w is Iw, w is an integer between 1 and M, and the maximum value of Iw is Imax.

[0187] In this case, it is assumed that Hmin>Imax holds. By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal that is the communication partner of the base station, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0188] In addition, the number of "modulated signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v and the number of "modulated signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w do not have to satisfy the conditions described above.

[0189] Furthermore, when the number of antennas constituting the first antenna module v of 106A_1_v in FIG. 1A1 is Jv, v is an integer between 1 and L, and the minimum value of Jv is Jmin.

[0190] When the number of antennas constituting the second antenna module #w of 106A_2_w in FIG. 1A1 is Kw, w is an integer between 1 and M, and the maximum value of Kw is Kmax.

[0191] In this case, it is assumed that Jmin>Kmax holds. By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal that is the communication partner of the base station, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0192] In addition, the number of "modulated signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v and the number of "modulated signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w do not have to satisfy the conditions described above.

[0193] The second antenna module may have a non-uniform antenna shape, and the first antenna module may be an antenna for FD (Full Dimension)-MIMO.

[0194] A limit may be placed on the number of antennas constituting the first antenna module and the number of antennas constituting the second antenna module.

[0195] For example, upper limits L1max and L2max are set for the number of antennas, where L1max is an integer equal to or greater than 2 and L2max is an integer equal to or greater than 1, and L1max > L2max holds. The upper limit for the number of antennas constituting the first antenna module may be set to L1max, and the upper limit for the number of antennas constituting the second antenna module may be set to L2max.

[0196] Hereinafter, differences between the first antenna module and the second antenna module in FIG. 1B will be described using examples.

[0197] In FIG. 1B, two or more signals exist in the "modulation signal ♭u of 103A_u" (u is an integer between 1 and K, inclusive, where K is an integer greater than or equal to 1, or an integer greater than or equal to 2). In this case, the number of existing signals is F. (Therefore, F is an integer greater than or equal to 2.)

[0198] For example, if two signals exist in the "modulation signal ♭u of 103A_u," then there exists a modulation signal ♭1 of 103A_1 and a modulation signal ♭2 of 103A_2.

[0199] First Antenna Module Related: Then, the number of "modulated signals ♭u of 103A_u" included in the signal group v after precoding of 133B_1_v in FIG. 1B is F or 0. Note that v is an integer between 1 and L, and L is an integer greater than or equal to 1 or an integer greater than or equal to 2. (In this case, when the number of "modulated signals ♭u of 103A_u" included in the signal group v after precoding of 133B_1_v is 0, it means that no signal is present.)

[0200] Second Antenna Module Related: The number of "modulated signals ♭u of 103A_u" included in signal group #w after precoding of 133B_2_w in FIG. 1B is an integer less than F (an integer equal to or less than F-1). Note that w is an integer between 1 and M, and M is an integer equal to or greater than 1 or an integer equal to or greater than 2. (In this case, when the number of "modulated signals ♭u of 103A_u" included in signal group #w after precoding of 133B_2_w in FIG. 1B is 0, this means that no signal is present.) However, although several alternative explanations are provided below, if these alternative explanations are implemented, the number of "modulated signals ♭u of 103A_u" included in signal group #w after precoding of 133B_2_w in FIG. 1B may be F.

[0201] First Antenna Module Related: Therefore, the number of "modulated signals ♭u of 103A_u" included in the group of transmitted signals v of 112A_1_v in FIG. 1B is F or 0. Note that v is an integer between 1 and L, and L is an integer greater than or equal to 1, or an integer greater than or equal to 2. (In this case, when the number of "modulated signals ♭u of 103A_u" included in the group of transmitted signals v of 112A_1_v is 0, it means that no signal is present.)

[0202] Related to the second antenna module: The number of "modulated signals ♭u of 103A_u" included in the group of transmitted signals #w of 112A_2_w in FIG. 1B is an integer between 0 and F (an integer between 0 and F-1). Note that w is an integer between 1 and M, and M is an integer between 1 and M, or an integer between 2 and 1. (In this case, when the number of "modulated signals ♭u of 103A_u" included in the group of transmitted signals #w of 112A_2_w in FIG. 1A1 is 0, this means that no signal is present.) However, although several alternative explanations are provided below, if these alternative explanations are implemented, the number of "modulated signals ♭u of 103A_u" included in the group of transmitted signals #w of 112A_2_w in FIG. 1B may be F.

[0203] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0204] Also, for example, upper limit values ​​B1max and B2max are set for the number of modulated signals (modulated signal ♭u of 103A_u) included in the transmission signal groups (transmission signal group v of 112A_1_v, transmission signal group #w of 112A_2_w). Note that B1max is an integer equal to or greater than 2, and B2max is an integer equal to or greater than 1, and B1max > B2max is established. In this case, the upper limit value for the number of modulated signals included in the transmission signal transmitted from the first antenna module is set to B1max, and the upper limit value for the number of modulated signals included in the transmission signal transmitted from the second antenna module is set to B2max. In this way, a similar effect can be obtained.

[0205] The above will be explained with a focus on precoding.

[0206] First Antenna Module Related: The number of "modulated signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v in FIG. 1B is F or 0. Note that v is an integer between 1 and L, and L is an integer greater than or equal to 1 or an integer greater than or equal to 2. Therefore, in the transmission signal group v of 112A_1_v that includes signals, the transmission signal group v of 112A_1_v includes F or more signals.

[0207] In the "modulation signal ♭u of 103A_u", the signal that exists is F, so the F signals are represented as Tx1i(t,f). Note that i is an integer between 1 and F, t represents time, and f represents frequency. In this case, the vector s1(t,f) = (Tx_1_1(t,f), Tx_1_2(t,f), ..., Tx_1_F(t,f)) Ｔ Here, if A is a vector, then A Ｔ is the transposed vector of vector A. Also, if A is a matrix, A Ｔ is the transposed matrix of matrix A.

[0208] It is assumed that the signal group v after precoding of 133B_1_v, in which a signal exists, contains Pv signals. These Pv signals are represented as Rx_1_v,k(t,f). Note that k is an integer between 1 and Pv, inclusive. However, Pv is an integer greater than or equal to 1. In this case, the vector r1v(t,f)=(Rx_1_v,1(t,f), Rx_1_v,2(t,f), ..., Rx_1_v,Pv(t,f)) Ｔ Let's say.

[0209] Then, r1v(t, f)=Xv×s1(t, f) holds, where Xv is a precoding matrix and is a matrix with F rows and Pv columns.

[0210] Related to the second antenna module: The number of "modulated signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w in FIG. 1B is an integer less than F (an integer equal to or less than F-1). Note that w is an integer equal to or greater than 1 and equal to or less than M, and M is an integer equal to or greater than 1, or an integer equal to or greater than 2. Therefore, in the transmission signal group #w of 112A_2_w in FIG. 1B that includes signals, the transmission signal group #w of 112A_2_w in FIG. 1B includes F-1 or more signals.

[0211] The number of "modulated signals ♭u of 103A_u" included in signal group #w after precoding of 133B_2_w in FIG. 1B is an integer less than F (an integer equal to or less than F-1). In this case, the number of "modulated signals ♭u of 103A_u" included in signal group #w after precoding of 133B_2_w is defined as Gw. Note that Gw is an integer equal to or greater than 0 and less than F (an integer equal to or greater than 0 and less than F-1). These Gw signals are represented as Tx_2_i(t,f). Note that i is an integer equal to or greater than 1 and less than Gw, t represents time, and f represents frequency. In this case, the vector s2w(t,f) = (Tx_2_1(t,f), Tx_2_2(t,f), ..., Tx_2_Gw(t,f)) Ｔ Let's say.

[0212] It is assumed that the signal group #w after precoding of 133B_2_w includes Qw signals. These Qw signals are represented as Rx_2_w,k(t,f). Note that k is an integer between 1 and Qw, inclusive. However, Qw is an integer greater than or equal to 1. In this case, the vector r2w(t,f) = (Rx_2_w,1(t,f), Rx_2_w,2(t,f), ..., Rx_2_w,Qw(t,f)). Ｔ Let's say.

[0213] Then, r2w(t, f)=Yw×s2w(t, f) holds, where Yw is a precoding matrix and is a matrix with Gw rows and Qw columns.

[0214] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0215] The "precoding matrix Xv used in association with the first antenna module" is selected from a plurality of precoding matrices, which are referred to as a first precoding matrix group.

[0216] The "precoding matrix Yw used in association with the second antenna module" is selected from a plurality of precoding matrices, which are referred to as a second precoding matrix group.

[0217] In this case, there is no identical precoding matrix between the first precoding matrix group and the second precoding matrix group.

[0218] As described above, the number of rows of the precoding matrices included in the first precoding matrix group is F, the number of rows of the precoding matrices included in the second precoding matrix group is Gw, and F≠Gw holds.

[0219] Furthermore, the modulated signal where u=C (modulated signal ♭C of 103A_C) may be transmitted from "one or more first antenna modules and one or more second antenna modules."

[0220] Another example will now be described.

[0221] 1B, a first antenna module v of 106A_1_v that transmits a group of transmission signals is focused on. When the number of transmission signals included in the group of transmission signals v of 112A_1_v transmitted from this first antenna module v of 106A_1_v is defined as Hv, v is an integer between 1 and L, and the minimum value of Hv is defined as Hmin.

[0222] 1B, a second antenna module #w of 106A_2_w that transmits a group of transmission signals is focused on. When the number of transmission signals included in the group of transmission signals #w of 112A_2_w transmitted from the second antenna module #w of 106A_2_w is Iw, w is an integer between 1 and M, and the maximum value of Iw is Imax.

[0223] In this case, it is assumed that Hmin>Imax holds. By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal that is the communication partner of the base station, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0224] In addition, the number of "modulated signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v and the number of "modulated signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w do not have to satisfy the conditions described above.

[0225] Furthermore, when the number of antennas constituting the first antenna module v of 106A_1_v in FIG. 1B is Jv, v is an integer between 1 and L, and the minimum value of Jv is Jmin.

[0226] When the number of antennas constituting the second antenna module #w of 106A_2_w in FIG. 1B is Kw, w is an integer between 1 and M, and the maximum value of Kw is Kmax.

[0227] In this case, it is assumed that Jmin>Kmax holds. By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal that is the communication partner of the base station, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0228] In addition, the number of "modulated signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v and the number of "modulated signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w do not have to satisfy the conditions described above.

[0229] The second antenna module may have a non-uniform antenna shape, and the first antenna module may be an antenna for FD (Full Dimension)-MIMO.

[0230] A limit may be placed on the number of antennas constituting the first antenna module and the number of antennas constituting the second antenna module.

[0231] For example, upper limits L1max and L2max are set for the number of antennas, where L1max is an integer equal to or greater than 2 and L2max is an integer equal to or greater than 1, and L1max > L2max holds. The upper limit for the number of antennas constituting the first antenna module may be set to L1max, and the upper limit for the number of antennas constituting the second antenna module may be set to L2max.

[0232] The above will be explained below with an example.

[0233] In FIG. 1B, it is assumed that there are two modulated signals (two streams, two layers): "modulated signal ♭1 of 103A_1" and "modulated signal ♭2 of 103A_2."

[0234] Related to the first antenna module: Then, when v is an integer between 1 and L, and L is an integer greater than or equal to 1 or greater than or equal to 2, if the signal group v after precoding of 133B_1_v in Figure 1B exists as a signal, the number of "modulated signals ♭u of 103A_u" included in the signal group v after precoding of 133B_1_v is 2.

[0235] Related to the second antenna module: When w is an integer between 1 and M, and M is an integer greater than or equal to 1 or greater than 2, if the signal group #w after precoding of 133B_2_w in FIG. 1B exists as a signal, the number of "modulated signals ♭u of 103A_u" included in the signal group #w after precoding of 133B_2_w is 1. However, although some alternative explanations are provided below, when these alternative explanations are implemented, the number of "modulated signals ♭u of 103A_u" included in the signal group #w after precoding of 133B_2_w in FIG. 1B may be 2.

[0236] Related to the first antenna module: Therefore, when v is an integer greater than or equal to 1 and less than or equal to L, and L is an integer greater than or equal to 1 or an integer greater than or equal to 2, if the transmission signal group v of 112A_1_v in Figure 1B exists as a signal, the number of "modulation signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v will be 2.

[0237] Related to the second antenna module: Then, when w is an integer between 1 and M inclusive, and M is an integer greater than or equal to 1 or greater than 2, if the transmission signal group #w of 112A_2_w in Fig. 1B exists as a signal, the number of "modulation signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w in Fig. 1B is 1. However, although some alternative explanations are provided below, if these alternative explanations are implemented, the number of "modulation signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w in Fig. 1B may be 2.

[0238] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0239] Furthermore, for example, upper limit values ​​B1max and B2max are set for the number of modulated signals (modulated signal ♭u of 103A_u) included in the transmission signal groups (transmission signal group v of 112A_1_v, transmission signal group #w of 112A_2_w). Note that B1max is set to 2 and B2max is set to 1, so that B1max > B2max holds. In this case, the upper limit value for the number of modulated signals included in the transmission signal transmitted from the first antenna module is set to B1max, and the upper limit value for the number of modulated signals included in the transmission signal transmitted from the second antenna module is set to B2max. In this way, a similar effect can be obtained.

[0240] The above will be explained with a focus on precoding.

[0241] First Antenna Module Related: When v is an integer between 1 and L, and L is an integer greater than or equal to 1 or greater than or equal to 2, if the transmission signal group v of 112A_1_v in FIG. 1A1 exists as a signal, the transmission signal group v of 112A_1_v includes two or more signals.

[0242] In the "modulation signal ♭u of 103A_u", there are two signals, so the two signals are represented as Tx_1_i(t,f). Note that i is an integer between 1 and 2, t represents time, and f represents frequency. In this case, the vector s1(t,f) = (Tx_1_1(t,f), Tx_1_2(t,f)). Ｔ Let's say.

[0243] It is assumed that the signal group v after precoding of 133B_1_v, in which a signal exists, contains Pv signals. These Pv signals are represented as Rx_1_v,k(t,f). Note that k is an integer between 1 and Pv, inclusive. However, Pv is an integer greater than or equal to 1. In this case, the vector r1v(t,f)=(Rx_1_v,1(t,f), Rx_1_v,2(t,f), ..., Rx_1_v,Pv(t,f)) Ｔ Let's say.

[0244] Then, r1v(t, f)=Xv×s1(t, f) holds, where Xv is a precoding matrix and is a matrix with 2 rows and Pv columns.

[0245] Related to the second antenna module: When w is an integer between 1 and M, and M is an integer greater than or equal to 1 or greater than or equal to 2, if the transmission signal group #w of 112A_2_w in FIG. 1B exists as a signal, the transmission signal group #w of 112A_2_w in FIG. 1B includes one or more signals.

[0246] The number of "modulated signals ♭u of 103A_u" included in the signal group #w after precoding of 133B_2_w in FIG. 1B is 1, and this signal is represented as Tx_2_1(t,f). In this case, vector s2w(t,f)=(Tx_2_1(t,f)) Ｔ Let's say.

[0247] It is assumed that the signal group #w after precoding of 133B_2_w includes Qw signals. These Qw signals are represented as Rx_2_w,k(t,f). Note that k is an integer between 1 and Qw, inclusive. However, Qw is an integer greater than or equal to 1. In this case, the vector r2w(t,f) = (Rx_2_w,1(t,f), Rx_2_w,2(t,f), ..., Rx_2_w,Qw(t,f)). Ｔ Let's say.

[0248] Then, r2w(t, f)=Yw×s2w(t, f) holds, where Yw is a precoding matrix and is a matrix with 1 row and Qw columns.

[0249] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0250] The "precoding matrix Xv used in association with the first antenna module" is selected from a plurality of precoding matrices, which are referred to as a first precoding matrix group.

[0251] The "precoding matrix Yw used in association with the second antenna module" is selected from a plurality of precoding matrices, which are referred to as a second precoding matrix group.

[0252] In this case, there is no identical precoding matrix between the first precoding matrix group and the second precoding matrix group.

[0253] This is because, as described above, the number of rows of the precoding matrices included in the first precoding matrix group is two, and the number of rows of the precoding matrix included in the second precoding matrix group is one.

[0254] Furthermore, the modulated signal where u=C (modulated signal ♭C of 103A_C) may be transmitted from "one or more first antenna modules and one or more second antenna modules."

[0255] Another example will now be described.

[0256] 1B, a first antenna module v of 106A_1_v that transmits a group of transmission signals is focused on. When the number of transmission signals included in the group of transmission signals v of 112A_1_v transmitted from this first antenna module v of 106A_1_v is defined as Hv, v is an integer between 1 and L, and the minimum value of Hv is defined as Hmin.

[0257] 1B, a second antenna module #w of 106A_2_w that transmits a group of transmission signals is focused on. When the number of transmission signals included in the group of transmission signals #w of 112A_2_w transmitted from the second antenna module #w of 106A_2_w is Iw, w is an integer between 1 and M, and the maximum value of Iw is Imax.

[0258] In this case, it is assumed that Hmin>Imax holds. By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal that is the communication partner of the base station, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0259] In addition, the number of "modulated signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v and the number of "modulated signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w do not have to satisfy the conditions described above.

[0260] Furthermore, when the number of antennas constituting the first antenna module v of 106A_1_v in FIG. 1B is Jv, v is an integer between 1 and L, and the minimum value of Jv is Jmin.

[0261] When the number of antennas constituting the second antenna module #w of 106A_2_w in FIG. 1B is Kw, w is an integer between 1 and M, and the maximum value of Kw is Kmax.

[0262] In this case, it is assumed that Jmin>Kmax holds. By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal that is the communication partner of the base station, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0263] In addition, the number of "modulated signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v and the number of "modulated signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w do not have to satisfy the conditions described above.

[0264] The second antenna module may have a non-uniform antenna shape, and the first antenna module may be an antenna for FD (Full Dimension)-MIMO.

[0265] A limit may be placed on the number of antennas constituting the first antenna module and the number of antennas constituting the second antenna module.

[0266] For example, upper limits L1max and L2max are set for the number of antennas, where L1max is an integer equal to or greater than 2 and L2max is an integer equal to or greater than 1, and L1max > L2max holds. The upper limit for the number of antennas constituting the first antenna module may be set to L1max, and the upper limit for the number of antennas constituting the second antenna module may be set to L2max.

[0267] 1B, it is assumed that there are four modulated signals (four streams, four layers): "modulated signal ♭1 of 103A_1," "modulated signal ♭2 of 103A_2," "modulated signal ♭3 of 103A_3," and "modulated signal ♭4 of 103A_4."

[0268] Related to the first antenna module: Then, when v is an integer between 1 and L, and L is an integer greater than or equal to 1 or greater than 2, if the signal group v after precoding of 133B_1_v in Figure 1B exists as a signal, the number of "modulated signals ♭u of 103A_u" included in the signal group v after precoding of 133B_1_v is 4.

[0269] Related to the second antenna module: Then, when w is an integer between 1 and M inclusive, and M is an integer greater than or equal to 1 or greater than 2, if the signal group #w after precoding of 133B_2_w in FIG. 1B exists as a signal, the number of "modulated signals ♭u of 103A_u" included in the signal group #w after precoding of 133B_2_w will be 1, 2, or 3. However, although several alternative explanations are provided below, when these alternative explanations are implemented, the number of "modulated signals ♭u of 103A_u" included in the signal group #w after precoding of 133B_2_w in FIG. 1B may be 4.

[0270] Related to the first antenna module: Therefore, when v is an integer between 1 and L, and L is an integer greater than or equal to 1 or an integer greater than or equal to 2, if the transmission signal group v of 112A_1_v in Figure 1B exists as a signal, the number of "modulation signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v is 4.

[0271] Related to the second antenna module: Then, when w is an integer between 1 and M inclusive, and M is an integer greater than or equal to 1 or greater than 2, if the transmission signal group #w of 112A_2_w in Fig. 1B exists as a signal, the number of "modulation signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w in Fig. 1B will be either 1, 2, or 3. However, although several alternative explanations are provided below, if these alternative explanations are implemented, the number of "modulation signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w in Fig. 1B may be 4.

[0272] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0273] Furthermore, for example, upper limit values ​​B1max and B2max are set for the number of modulated signals (modulated signal ♭u of 103A_u) included in the transmission signal groups (transmission signal group v of 112A_1_v, transmission signal group #w of 112A_2_w). Note that B1max is set to 2 and B2max is set to 1, so that B1max > B2max holds. In this case, the upper limit value for the number of modulated signals included in the transmission signal transmitted from the first antenna module is set to B1max, and the upper limit value for the number of modulated signals included in the transmission signal transmitted from the second antenna module is set to B2max. In this way, a similar effect can be obtained.

[0274] The above will be explained with a focus on precoding.

[0275] First Antenna Module Related: When v is an integer between 1 and L, and L is an integer greater than or equal to 1 or greater than or equal to 2, if the transmission signal group v of 112A_1_v in FIG. 1B exists as a signal, the transmission signal group v of 112A_1_v includes four or more signals.

[0276] In "modulation signal ♭u of 103A_u", there are four signals, so the four signals are represented as Tx_1_i(t,f). Note that i is an integer between 1 and 4, t represents time, and f represents frequency. In this case, vector s1(t,f) = (Tx_1_1(t,f), Tx_1_2(t,f), Tx_1_3(t,f), Tx_1_4(t,f)). Ｔ Let's say.

[0277] It is assumed that the signal group v after precoding of 133B_1_v, in which a signal exists, contains Pv signals. These Pv signals are represented as Rx_1_v,k(t,f). Note that k is an integer between 1 and Pv, inclusive. However, Pv is an integer greater than or equal to 1. In this case, the vector r1v(t,f)=(Rx_1_v,1(t,f), Rx_1_v,2(t,f), ..., Rx_1_v,Pv(t,f)) Ｔ Let's say.

[0278] Then, r1v(t, f)=Xv×s1(t, f) holds, where Xv is a precoding matrix and is a matrix with 4 rows and Pv columns.

[0279] Related to the second antenna module: When w is an integer between 1 and M, and M is an integer greater than or equal to 1 or greater than or equal to 2, if the transmission signal group #w of 112A_2_w in Figure 1B exists as a signal, the transmission signal group #w of 112A_2_w in Figure 1B includes three or more signals.

[0280] The number of "modulated signals ♭u of 103A_u" included in signal group #w after precoding of 133B_2_w in FIG. 1B is an integer of 3 or less. In this case, the number of "modulated signals ♭u of 103A_u" included in signal group #w after precoding of 133B_2_w is set to Gw. Gw is an integer between 0 and 3. These Gw signals are represented as Tx_2_i(t,f). i is an integer between 1 and Gw, t represents time, and f represents frequency. In this case, vector s2w(t,f) = (Tx_2_1(t,f), Tx_2_2(t,f), ..., Tx_2_Gw(t,f)) Ｔ Let's say.

[0281] It is assumed that the signal group #w after precoding of 133B_2_w includes Qw signals. These Qw signals are represented as Rx_2_w,k(t,f). Note that k is an integer between 1 and Qw, inclusive. However, Qw is an integer greater than or equal to 1. In this case, the vector r2w(t,f) = (Rx_2_w,1(t,f), Rx_2_w,2(t,f), ..., Rx_2_w,Qw(t,f)). Ｔ Let's say.

[0282] Then, r2w(t, f)=Yw×s2w(t, f) holds, where Yw is a precoding matrix and is a matrix with Gw rows and Qw columns.

[0283] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0284] The "precoding matrix Xv used in association with the first antenna module" is selected from a plurality of precoding matrices, which are referred to as a first precoding matrix group.

[0285] The "precoding matrix Yw used in association with the second antenna module" is selected from a plurality of precoding matrices, which are referred to as a second precoding matrix group.

[0286] In this case, there is no identical precoding matrix between the first precoding matrix group and the second precoding matrix group.

[0287] This is because, as described above, the number of rows of the precoding matrices included in the first precoding matrix group is 4, and the number of rows of the precoding matrices included in the second precoding matrix group is Gw.

[0288] Furthermore, the modulated signal where u=C (modulated signal ♭C of 103A_C) may be transmitted from "one or more first antenna modules and one or more second antenna modules."

[0289] Another example will now be described.

[0290] 1B, a first antenna module v of 106A_1_v that transmits a group of transmission signals is focused on. When the number of transmission signals included in the group of transmission signals v of 112A_1_v transmitted from this first antenna module v of 106A_1_v is defined as Hv, v is an integer between 1 and L, and the minimum value of Hv is defined as Hmin.

[0291] 1B, a second antenna module #w of 106A_2_w that transmits a group of transmission signals is focused on. When the number of transmission signals included in the group of transmission signals #w of 112A_2_w transmitted from the second antenna module #w of 106A_2_w is Iw, w is an integer between 1 and M, and the maximum value of Iw is Imax.

[0292] In this case, it is assumed that Hmin>Imax holds. By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal that is the communication partner of the base station, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0293] In addition, the number of "modulated signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v and the number of "modulated signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w do not have to satisfy the conditions described above.

[0294] Furthermore, when the number of antennas constituting the first antenna module v of 106A_1_v in FIG. 1B is Jv, v is an integer between 1 and L, and the minimum value of Jv is Jmin.

[0295] When the number of antennas constituting the second antenna module #w of 106A_2_w in FIG. 1B is Kw, w is an integer between 1 and M, and the maximum value of Kw is Kmax.

[0296] In this case, it is assumed that Jmin>Kmax holds. By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal that is the communication partner of the base station, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0297] In addition, the number of "modulated signals ♭u of 103A_u" included in the transmission signal group v of 112A_1_v and the number of "modulated signals ♭u of 103A_u" included in the transmission signal group #w of 112A_2_w do not have to satisfy the conditions described above.

[0298] The second antenna module may have a non-uniform antenna shape, and the first antenna module may be an antenna for FD (Full Dimension)-MIMO.

[0299] A limit may be placed on the number of antennas constituting the first antenna module and the number of antennas constituting the second antenna module.

[0300] For example, upper limits L1max and L2max are set for the number of antennas, where L1max is an integer equal to or greater than 2 and L2max is an integer equal to or greater than 1, and L1max > L2max holds. The upper limit for the number of antennas constituting the first antenna module may be set to L1max, and the upper limit for the number of antennas constituting the second antenna module may be set to L2max.

[0301] Illustratively, there are Nx layers (Nx is an integer equal to or greater than 1) generated from data (e.g., transmission data 101A_u in FIG. 1A1 or a portion thereof), and the first antenna module performs a first operation of transmitting Ax transmission signals (Ax is an integer equal to or greater than 2) generated from the Nx layers. Note that, for example, if there are two layers, the Nx layers correspond to two layers: "modulation signal ♭1 of 103A_1" and "modulation signal ♭2 of 103A_2."

[0302] Also, illustratively, the second antenna module performs a second operation of transmitting Bx transmission signals (Bx is an integer greater than or equal to 1 and less than Ax) generated from the above-mentioned Nx layers or Mx layers (Mx is an integer greater than or equal to 1 and less than Nx) that are part of the Nx layers. Note that, for example, if the Nx layers are two layers, "modulation signal ♭1 of 103A_1" and "modulation signal ♭2 of 103A_2," the Mx layers correspond to some or all of the two layers, "modulation signal ♭1 of 103A_1" and "modulation signal ♭2 of 103A_2."

[0303] Furthermore, Nx is not limited to 2, but may be 1, or may be 3 or more. One example is when Ax is 2 and Bx is 1, but Ax is not limited to 2 and Bx is not limited to 1. For example, Ax may be 4 and Bx may be 2.

[0304] Next, a method for controlling an antenna port in a base station having the configurations of FIGS. 1A1 and 1B will be described.

[0305] An antenna port may be a logical antenna (antenna group) consisting of one or more physical antennas. In other words, an antenna port does not necessarily refer to a single physical antenna, but may refer to an array antenna, antenna module, etc. consisting of multiple antennas. For example, the number of physical antennas an antenna port is composed of may not be specified, and it may be specified as the smallest unit by which a terminal station can transmit a reference signal (reference signal). In addition, an antenna port may be specified as a unit or smallest unit by which a precoding vector or a weighting of a precoding matrix is ​​multiplied. However, the interpretation of an antenna port is not limited to these examples, and new concepts and configurations may be added.

[0306] It should be noted that "antenna port" may be interchangeable with other terms such as "antenna section," "antenna," and "antenna unit."

[0307] Figure 5A shows an example of the configuration around the antenna ports when antenna ports are provided in place of the "first antenna module v of 106A_1_v" and the "second antenna module #w of 106A_2_w" in a base station having the configurations of Figures 1A1 and 1B. Note that in Figure 5A, components that operate in the same way as in Figures 1A and 1B are assigned the same numbers, and some explanations of parts that have already been explained will be omitted.

[0308] First selection section 501A receives control signal 192A as input and selects an antenna port based on information about the antenna port to be used, which information is included in control signal 192A.

[0309] Then, the first selection unit 501A transmits the transmission signal group v of 112A_1_v using the selected antenna port.

[0310] For example, when antenna port 0 of 590A_0 is selected as the antenna port for transmitting a transmission signal group, first selection unit 501A outputs one of transmission signal groups v of 112A_1_v as signal group 511A_1_0, and signal group 511A_1_0 is output as radio waves from antenna port 0 of 590A_0. Note that antenna port 0 of 590A_0 may receive control signal 192A as input, and antenna port 0 of 590A_0 may perform beamforming (directivity control) based on the control signal 192A.

[0311] Therefore, when antenna port p of 590A_p is selected as the antenna port for transmitting a transmission signal group, first selection unit 501A outputs one of transmission signal groups v of 112A_1_v as signal group 511A_1_p, and signal group 511A_1_p is output as radio waves from antenna port p of 590A_p. Note that antenna port p of 590A_p may receive control signal 192A as input, and antenna port p of 590A_p may perform beamforming (directivity control) based on control signal 192A. Note that p can be represented by an integer between 0 and 31.

[0312] Therefore, "antenna port 0 of 590A_0 to antenna port 31 of 590A_31" are antenna ports that can transmit one or more transmit signals, and "antenna port 0 of 590A_0 to antenna port 31 of 590A_31" are antenna ports for the first antenna module.

[0313] The second selection unit 502A receives the control signal 192A as input and selects an antenna port based on the information on the antenna port to be used that is included in the control signal 192A.

[0314] Then, the second selection unit 502A transmits the transmission signal group #w of 112A_2_w using the selected antenna port.

[0315] For example, when antenna port 32 of 590A_32 is selected as the antenna port for transmitting a transmission signal group, second selection unit 502A outputs one of transmission signal groups #w of 112A_2_w as signal group 511A_2_32, and signal group 511A_2_32 is output as radio waves from antenna port 32 of 590A_32. Note that antenna port 32 of 590A_32 may receive control signal 192A as input, and antenna port 32 of 590A_32 may perform beamforming (directivity control) based on the control signal 192A.

[0316] Therefore, when antenna port q of 590A_q is selected as the antenna port from which to transmit the transmission signals, second selection unit 502A outputs one of transmission signal groups #w of 112A_2_w as signal group 511A_2_q, and signal group 511A_2_q is output as radio waves from antenna port q of 590A_q. Antenna port q of 590A_q may receive control signal 192A as input, and antenna port q of 590A_q may perform beamforming (directivity control) based on control signal 192A. Note that q can be expressed as an integer between 32 and 63.

[0317] Therefore, "antenna port 32 of 590A_32 to antenna port 63 of 590A_63" are antenna ports that can transmit one or more transmit signals, and "antenna port 32 of 590A_32 to antenna port 63 of 590A_63" are antenna ports for the second antenna module.

[0318] An example of operation related to Fig. 5A will be described. For example, as shown in Fig. 5B1, first selection unit 501A receives control signal 192A, transmission signal group 1 of 112A_1_1, and transmission signal group 2 of 112A_1_2 as input, and determines, based on information about the antenna ports to be used included in control signal 192A, to transmit transmission signal group 1 of 112A_1_1 using antenna port 30 of 590A_30 and transmission signal group 2 of 112A_1_2 using antenna port 4 of 590A_4. Then, transmission signal group 1 of 112A_1_1 is output as signal group 511A_1_30 and transmission signal group 2 of 112A_1_2 as signal group 511A_1_4. Signal group 511A_1_30 is then output as radio waves from antenna port 30 of 590A_30, and signal group 511A_1_4 is output as radio waves from antenna port 4 of 590A_4.

[0319] 5B1, second selection unit 502A receives control signal 192A, transmission signal group 1 of 112A_2_1, transmission signal group 2 of 112A_2_2, transmission signal group 3 of 112A_2_3, and transmission signal group 4 of 112A_2_4 as input, and selects transmission signal group 1 of 112A_2_1 using antenna port 62 of 590A_62, transmission signal group 2 of 112A_2_2 using antenna port 53 of 590A_53, and transmission signal group 4 of 112A_2_4 based on information on the antenna port to be used, which is included in control signal 192A. It is decided that transmission signal group 3 of 112A_2_3 will be transmitted using antenna port 47 of 90A_47, and transmission signal group 4 of 112A_2_4 will be transmitted using antenna port 59 of 590A_59, and transmission signal group 1 of 112A_2_1 will be output as signal group 511A_2_62, transmission signal group 2 of 112A_2_2 will be output as signal group 511A_2_53, transmission signal group 3 of 112A_2_3 will be output as signal group 511A_2_47, and transmission signal group 4 of 112A_2_4 will be output as signal group 511A_2_59. Then, signal group 511A_2_62 is output as radio waves from antenna port 62 of 590A_62, signal group 511A_2_53 is output as radio waves from antenna port 53 of 590A_53, signal group 511A_2_47 is output as radio waves from antenna port 47 of 590A_47, and signal group 511A_2_59 is output as radio waves from antenna port 59 of 590A_59.

[0320] In this way, each group of transmission signals for the first antenna module may be transmitted using one antenna port, and each group of transmission signals for the second antenna module may be transmitted using one antenna port.

[0321] There may be a plurality of groups of transmission signals for the first antenna module, and there may be a plurality of groups of transmission signals for the second antenna module.

[0322] An example of operation related to Fig. 5A will be described. For example, as shown in Fig. 5B2, first selection unit 501A receives control signals 192A and 112A_1_1 as input, and determines to transmit transmission signal group 1 of 112A_1_1 using antenna port 29 of 590A_29 based on information about the antenna port to be used, which is included in control signal 192A. Then, first selection unit 501A outputs transmission signal group 1 of 112A_1_1 as signal group 511A_1_29. Signal group 511A_1_29 is then output as radio waves from antenna port 29 of 590A_29.

[0323] 5B2 , second selection unit 502A receives control signal 192A, transmission signal group 1 of 112A_2_1, and transmission signal group 2 of 112A_2_2 as input, and determines, based on information about the antenna port to be used included in control signal 192A, to transmit transmission signal group 1 of 112A_2_1 using antenna port 47 of 590A_47 and transmission signal group 2 of 112A_2_2 using antenna port 61 of 590A_61, and outputs transmission signal group 1 of 112A_2_1 as signal group 511A_2_47 and transmission signal group 2 of 112A_2_2 as signal group 511A_2_61. Signal group 511A_2_47 is then output as radio waves from antenna port 47 of 590A_47, and signal group 511A_2_61 is output as radio waves from antenna port 61 of 590A_61.

[0324] In this way, each group of transmission signals for the first antenna module may be transmitted using one antenna port, and each group of transmission signals for the second antenna module may be transmitted using one antenna port.

[0325] There may be one group of transmit signals for the first antenna module, and there may be multiple groups of transmit signals for the second antenna module.

[0326] An example of operation related to Fig. 5A will be described. For example, as shown in Fig. 5B3, first selection unit 501A receives control signal 192A, transmission signal group 1 of 112A_1_1, and transmission signal group 2 of 112A_1_2 as input, and determines, based on information about the antenna ports to be used included in control signal 192A, to transmit transmission signal group 1 of 112A_1_1 using antenna port 7 of 590A_7 and transmission signal group 2 of 112A_1_2 using antenna port 9 of 590A_9. Then, transmission signal group 1 of 112A_1_1 is output as signal group 511A_1_7 and transmission signal group 2 of 112A_1_2 as signal group 511A_1_9. Signal group 511A_1_7 is then output as radio waves from antenna port 7 of 590A_7, and signal group 511A_1_9 is output as radio waves from antenna port 9 of 590A_9.

[0327] 5B3, second selection unit 502A receives control signals 192A and 112A_2_1 transmission signal group 1 as input, and determines to transmit transmission signal group 1 of 112A_2_1 using antenna port 60 of 590A_60 based on information on the antenna port to be used, which is included in control signal 192A, and outputs transmission signal group 1 of 112A_2_1 as signal group 511A_2_60. Signal group 511A_2_60 is then output as radio waves from antenna port 60 of 590A_60.

[0328] In this way, each group of transmission signals for the first antenna module may be transmitted using one antenna port, and each group of transmission signals for the second antenna module may be transmitted using one antenna port.

[0329] There may be a plurality of groups of transmission signals for the first antenna module, and there may be one group of transmission signals for the second antenna module.

[0330] Figure 5C shows an example of the configuration around the antenna ports, different from that of Figure 5A, in which antenna ports are provided in place of the "first antenna module v of 106A_1_v" and the "second antenna module #w of 106A_2_w" in a base station having the configurations of Figures 1A1 and 1B. Note that in Figure 5C, components that operate in the same way as in Figures 1A and 1B are assigned the same numbers, and some explanations of parts that have already been explained will be omitted.

[0331] First selection section 501C receives control signal 192A as input and selects an antenna port based on information about the antenna port to be used, which information is included in control signal 192A.

[0332] Then, the first selection unit 501C transmits the transmission signals included in the transmission signal group v of 112A_1_v using the selected antenna port.

[0333] For example, when antenna port 0 of 590C_0 is selected as the antenna port for transmitting a transmission signal included in the transmission signal group, first selection unit 501C outputs a transmission signal included in one of transmission signal groups v of 112A_1_v as signal 521C_1_0, and signal 521C_1_0 is output as a radio wave from antenna port 0 of 590C_0. Note that antenna port 0 of 590C_0 may receive control signal 192A as input, and antenna port 0 of 590C_0 may perform beamforming (directivity control) based on control signal 192A.

[0334] Therefore, when antenna port p of 590C_p is selected as the antenna port for transmitting a transmission signal included in the transmission signal group, first selection unit 501C outputs a transmission signal included in one of transmission signal groups v of transmission signal group 112A_1_v as signal 521C_1_p, and signal 521C_1_p is output as a radio wave from antenna port p of 590C_p. Note that antenna port p of 590C_p may receive control signal 192A as input, and antenna port p of 590C_p may perform beamforming (directivity control) based on control signal 192A. Note that p can be represented by an integer between 0 and 255.

[0335] Therefore, "antenna port 0 of 590C_0 to antenna port 255 of 590C_255" are antenna ports that can transmit one of the transmission signals included in the transmission signal group. Also, "antenna port 0 of 590C_0 to antenna port 255 of 590C_255" are antenna ports for the first antenna module.

[0336] Second selection section 502C receives control signal 192A as input and selects an antenna port based on information about the antenna port to be used, which information is included in control signal 192A.

[0337] Then, the second selection unit 502C transmits the transmission signals included in the transmission signal group #w of 112A_2_w using the selected antenna port.

[0338] For example, when antenna port 256 of 590C_256 is selected as the antenna port for transmitting a transmission signal included in the transmission signal group, second selection unit 502C outputs a transmission signal included in one of transmission signal groups #w of 112A_2_w as signal 521C_2_256, and signal 521C_2_256 is output as a radio wave from antenna port 256 of 590C_256. Note that antenna port 256 of 590C_256 may receive control signal 192A as input, and antenna port 256 of 590C_256 may perform beamforming (directivity control) based on control signal 192A.

[0339] Therefore, when antenna port q of 590C_q is selected as the antenna port for transmitting a transmission signal included in the transmission signal group, second selection unit 502C outputs a transmission signal included in one of transmission signal groups #w of 112A_2_w as signal 521C_2_q, and signal 521C_2_q is output as a radio wave from antenna port q of 590C_q. Note that antenna port q of 590C_q may receive control signal 192A as input, and antenna port q of 590C_q may perform beamforming (directivity control) based on control signal 192A. Note that q can be expressed as an integer between 256 and 511.

[0340] Therefore, "antenna port 256 of 590C_256 to antenna port 511 of 590C_511" are antenna ports that can transmit one of the transmission signals included in the transmission signal group. Also, "antenna port 256 of 590C_256 to antenna port 511 of 590C_511" are antenna ports for the second antenna module.

[0341] An example of operation relating to Fig. 5C will be described. For example, as shown in Fig. 5D1, the first selection unit 501C receives the control signals 192A, the transmission signal group 1 of 112A_1_1, and the transmission signal group 2 of 112A_1_2 as input, and selects the transmission signal group 1 of 112A_1_1 using "antenna port 30 of 590C_30, antenna port 31 of 590C_31, antenna port 32 of 590C_32, and antenna port 33 of 590C_33" based on the information on the antenna ports to be used, which is included in the control signal 192A. The control unit 112 determines that transmission signal group 2 of 112A_1_2 will be transmitted using "antenna port 3 of 590C_3, antenna port 60 of 590C_60, and antenna port 157 of 590C_157," and outputs transmission signal group 1 of 112A_1_1 as "signal 521C_1_30, signal 521C_1_31, signal 521C_1_32, and signal 521C_1_33," and transmit signal group 2 of 112A_1_2 as "signal 521C_1_40, signal 521C_1_3, signal 521C_1_60, and signal 521C_1_157." In other words, transmission signal group 1 of 112A_1_1 includes four transmission signals, and transmission signal group 2 of 112A_1_2 includes four transmission signals.

[0342] Then, signal 521C_1_30 is output as radio waves from antenna port 30 of 590C_30, signal 521C_1_31 is output as radio waves from antenna port 31 of 590C_31, signal 521C_1_32 is output as radio waves from antenna port 32 of 590C_32, and signal 521C_1_33 is output as radio waves from antenna port 33 of 590C_33.

[0343] In addition, signal 521C_1_40 is output as radio waves from antenna port 40 of 590C_40, signal 521C_1_3 is output as radio waves from antenna port 3 of 590C_3, signal 521C_1_60 is output as radio waves from antenna port 60 of 590C_60, and signal 521C_1_157 is output as radio waves from antenna port 157 of 590C_157.

[0344] As shown in FIG. 5D1, the second selection unit 502C receives as input the control signal 192A, the transmission signal group 1 of 112A_2_1, and the transmission signal group 2 of 112A_2_2, and, based on the information on the antenna ports to be used included in the control signal 192A, determines to transmit the transmission signal group 1 of 112A_2_1 using "antenna port 256 of 590C_256 and antenna port 500 of 590C_500," and to transmit the transmission signal group 2 of 112A_2_2 using "antenna port 298 of 590C_298 and antenna port 312 of 590C_312," and outputs the transmission signal group 1 of 112A_2_1 as "signal 521C_2_256, signal 521C_2_500" and the transmission signal group 2 of 112A_2_2 as "signal 521C_2_298, signal 521C_2_312." That is, transmit signal group 1 of 112A_2_1 includes two transmit signals, and transmit signal group 2 of 112A_2_2 includes two transmit signals. Signal 521C_2_256 is output as a radio wave from antenna port 256 of 590C_256, and signal 521C_2_500 is output as a radio wave from antenna port 500 of 590C_500. Signal 521C_2_298 is output as a radio wave from antenna port 298 of 590C_298, and signal 521C_2_312 is output as a radio wave from antenna port 312 of 590C_500.

[0345] In this way, multiple groups of transmission signals for the first antenna module may be transmitted using multiple antenna ports, and multiple groups of transmission signals for the second antenna module may be transmitted using multiple antenna ports.

[0346] An example of operation related to Fig. 5C will be described. For example, as shown in Fig. 5D2, the first selection unit 501C receives the control signal 192A, the transmission signal group 1 of 112A_1_1, and the transmission signal group 2 of 112A_1_2 as input, and selects the transmission signal group 1 of 112A_1_1 using "antenna port 5 of 590C_5, antenna port 7 of 590C_7, antenna port 10 of 590C_10, antenna port 14 of 590C_14, antenna port 20 of 590C_20, antenna port 25 of 590C_25, antenna port 41 of 590C_41, and antenna port 87 of 590C_87" based on the information on the antenna ports to be used included in the control signal 192A. It is decided that transmission signal group 2 of 112A_1_2 will be transmitted using "antenna port 140 of 590C_140, antenna port 179 of 590C_179, and antenna port 216 of 590C_216," and transmission signal group 1 of 112A_1_1 is output as "signal 521C_1_5, signal 521C_1_7, signal 521C_1_10, signal 521C_1_14, signal 521C_1_20, signal 521C_1_25, signal 521C_1_41, signal 521C_1_87," and transmission signal group 2 of 112A_1_2 is output as "signal 521C_1_128, signal 521C_1_140, signal 521C_1_179, signal 521C_1_216." That is, the transmission signal group 1 of 112A_1_1 includes eight transmission signals, and the transmission signal group 2 of 112A_1_2 includes four transmission signals.

[0347] Then, signal 521C_1_5 is output as radio waves from antenna port 5 of 590C_5, signal 521C_1_7 is output as radio waves from antenna port 7 of 590C_7, signal 521C_1_10 is output as radio waves from antenna port 10 of 590C_10, signal 521C_1_14 is output as radio waves from antenna port 14 of 590C_14, signal 521C_1_20 is output as radio waves from antenna port 20 of 590C_20, signal 521C_1_25 is output as radio waves from antenna port 25 of 590C_25, signal 521C_1_41 is output as radio waves from antenna port 41 of 590C_41, and signal 521C_1_87 is output as radio waves from antenna port 87 of 590C_87.

[0348] In addition, signal 521C_1_128 is output as radio waves from antenna port 128 of 590C_128, signal 521C_1_140 is output as radio waves from antenna port 140 of 590C_140, signal 521C_1_179 is output as radio waves from antenna port 179 of 590C_179, and signal 521C_1_216 is output as radio waves from antenna port 216 of 590C_216.

[0349] As shown in FIG. 5D2, the second selection unit 502C receives as input the control signal 192A, the transmission signal group 1 of 112A_2_1, and the transmission signal group 2 of 112A_2_2, and, based on the information on the antenna ports to be used included in the control signal 192A, determines to transmit the transmission signal group 1 of 112A_2_1 using "antenna port 258 of 590C_258 and antenna port 302 of 590C_302" and the transmission signal group 2 of 112A_2_2 using "antenna port 457 of 590C_457," and outputs the transmission signal group 1 of 112A_2_1 as "signal 521C_2_258, signal 521C_2_302" and the transmission signal group 2 of 112A_2_2 as "signal 521C_2_457." That is, transmission signal group 1 of 112A_2_1 includes two transmission signals, and transmission signal group 2 of 112A_2_2 includes one transmission signal. Signal 521C_2_258 is output as a radio wave from antenna port 258 of 590C_258, and signal 521C_2_302 is output as a radio wave from antenna port 302 of 590C_302.

[0350] Furthermore, signal 521C_2_457 is output as a radio wave from antenna port 457 of 590C_457.

[0351] In this way, a plurality of groups of transmission signals for the first antenna module may be transmitted using a plurality of antenna ports, and the number of antenna ports used may differ depending on the group of transmission signals.

[0352] Furthermore, a plurality of groups of transmission signals for the second antenna module may be transmitted using a plurality of antenna ports, and in this case, the number of antenna ports used may differ depending on the groups of transmission signals.

[0353] An example of operation related to Fig. 5C will be described. For example, as shown in Fig. 5D3, first selection unit 501C receives control signals 192A and 112A_1_1 as input, and determines to transmit transmission signal group 1 of 112A_1_1 using "antenna port 30 of 590C_30, antenna port 68 of 590C_68, antenna port 111 of 590C_111, and antenna port 239 of 590C_239" based on information on the antenna port to be used included in control signal 192A, and outputs transmission signal group 1 of 112A_1_1 as "signal 521C_1_30, signal 521C_1_68, signal 521C_1_111, and signal 521C_1_239." In other words, transmission signal group 1 of 112A_1_1 includes four transmission signals.

[0354] Then, signal 521C_1_30 is output as radio waves from antenna port 30 of 590C_30, signal 521C_1_68 is output as radio waves from antenna port 68 of 590C_68, signal 521C_1_111 is output as radio waves from antenna port 111 of 590C_111, and signal 521C_1_239 is output as radio waves from antenna port 239 of 590C_239.

[0355] Also, as shown in FIG. 5D3, the second selection unit 502C receives as input the control signal 192A, the transmission signal group 1 of 112A_2_1, and the transmission signal group 2 of 112A_2_2, and, based on the information on the antenna ports to be used included in the control signal 192A, determines to transmit the transmission signal group 1 of 112A_2_1 using "antenna port 278 of 590C_278 and antenna port 279 of 590C_279" and the transmission signal group 2 of 112A_2_2 using "antenna port 356 of 590C_356 and antenna port 497 of 590C_497," and outputs the transmission signal group 1 of 112A_2_1 as "signal 521C_2_278, signal 521C_2_279" and the transmission signal group 2 of 112A_2_2 as "signal 521C_2_356, signal 521C_2_497." That is, the transmission signal group 1 of 112A_2_1 includes two transmission signals, and the transmission signal group 2 of 112A_2_2 includes two transmission signals.

[0356] Then, signal 521C_2_278 is output as a radio wave from antenna port 278 of 590C_278, and signal 521C_2_279 is output as a radio wave from antenna port 279 of 590C_279.

[0357] Furthermore, signal 521C_2_356 is output as a radio wave from antenna port 356 of 590C_356, and signal 521C_2_497 is output as a radio wave from antenna port 497 of 590C_497.

[0358] In this way, one group of transmission signals for the first antenna module may be transmitted using multiple antenna ports, and multiple groups of transmission signals for the second antenna module may be transmitted using multiple antenna ports.

[0359] An example of operation relating to Fig. 5C will be described. For example, as shown in Fig. 5D4, first selection unit 501C receives control signal 192A, transmission signal group 1 of 112A_1_1, and transmission signal group 2 of 112A_1_2 as input, and selects transmission signal group 1 of 112A_1_1 using "antenna port 2 of 590C_2, antenna port 3 of 590C_3, antenna port 4 of 590C_4, and antenna port 5 of 590C_5" based on information on the antenna ports to be used, which is included in control signal 192A. It is determined that transmit signal group 2 of 112A_1_2 will be transmitted using "antenna port 124 of 112A_1_1, antenna port 125 of 590C_125, and antenna port 126 of 590C_126," and transmit signal group 1 of 112A_1_1 is output as "signal 521C_1_2, signal 521C_1_3, signal 521C_1_4, signal 521C_1_5," and transmit signal group 2 of 112A_1_2 is output as "signal 521C_1_123, signal 521C_1_124, signal 521C_1_125, signal 521C_1_126." In other words, transmit signal group 1 of 112A_1_1 includes two transmit signals, and transmit signal group 2 of 112A_1_2 includes two transmit signals.

[0360] Then, signal 521C_1_2 is output as radio waves from antenna port 2 of 590C_2, signal 521C_1_3 is output as radio waves from antenna port 3 of 590C_3, signal 521C_1_4 is output as radio waves from antenna port 4 of 590C_4, and signal 521C_1_5 is output as radio waves from antenna port 5 of 590C_5.

[0361] In addition, signal 521C_1_123 is output as radio waves from antenna port 123 of 590C_123, signal 521C_1_124 is output as radio waves from antenna port 124 of 590C_124, signal 521C_1_125 is output as radio waves from antenna port 125 of 590C_125, and signal 521C_1_126 is output as radio waves from antenna port 126 of 590C_126.

[0362] 5D4, second selection unit 502C receives control signals 192A and 112A_2_1 transmission signal group 1 as input, and determines to transmit transmission signal group 1 of 112A_2_1 using "antenna port 478 of 590C_478 and antenna port 501 of 590C_501" based on information about the antenna port to be used, which is included in control signal 192A, and outputs transmission signal group 1 of 112A_2_1 as "signal 521C_2_478, signal 521C_2_501." In other words, transmission signal group 1 of 112A_2_1 includes two transmission signals.

[0363] Then, signal 521C_2_478 is output as radio waves from antenna port 478 of 590C_478, and signal 521C_2_501 is output as radio waves from antenna port 501 of 590C_501.

[0364] In this way, multiple groups of transmission signals for the first antenna module may be transmitted using multiple antenna ports, and one group of transmission signals for the second antenna module may be transmitted using multiple antenna ports.

[0365] Figure 5E shows an example of the configuration around the antenna ports when antenna ports are provided in place of the "first antenna module v of 106A_1_v" and the "second antenna module #w of 106A_2_w" in the base station having the configurations of Figures 1A1 and 1B. Note that in Figure 5E, components that operate in the same way as in Figures 1A and 1B are assigned the same numbers, and some explanations of parts that have already been explained will be omitted.

[0366] Selector 530E receives control signal 192A as input and selects an antenna port based on information about the antenna port to be used, which information is included in control signal 192A.

[0367] Then, the selector 530E transmits the transmission signal group v of 112A_1_v and the transmission signal group #w of 112A_2_w using the selected antenna port.

[0368] For example, when antenna port 0 of 590E_0 is selected as the antenna port for transmitting a transmission signal group, the selection unit 530E outputs "any transmission signal group among transmission signal group v of 112A_1_v" or "any transmission signal group among transmission signal group #w of 112A_2_w" as signal group 531E_0, and signal group 531E_0 is output as radio waves from antenna port 0 of 590E_0. Note that antenna port 0 of 590E_0 may receive the control signal 192A as input, and antenna port 0 of 590E_0 may perform beamforming (directivity control) based on the control signal 192A.

[0369] Therefore, when antenna port p of 590E_p is selected as the antenna port for transmitting a transmission signal group, the selection unit 530E outputs "any transmission signal group among transmission signal group v of 112A_1_v" or "any transmission signal group among transmission signal group #w of 112A_2_w" as signal group 531E_p, and signal group 531E_p is output as radio waves from antenna port p of 590E_p. Note that antenna port p of 590E_p may receive control signal 192A as input, and antenna port p of 590E_p may perform beamforming (directivity control) based on the control signal 192A. Note that p can be represented by an integer between 0 and 63.

[0370] Therefore, "antenna port 0 of 590E_0 to antenna port 63 of 590E_63" are antenna ports that can transmit one or more transmit signals. Also, "antenna port 0 of 590E_0 to antenna port 63 of 590E_63" are antenna ports for the first antenna module and the second antenna module.

[0371] An example of operation will be described with reference to Fig. 5E. For example, as shown in Fig. 5F1, a selection unit 530E receives as input the control signal 192A, the transmission signal group 1 of 112A_1_1, the transmission signal group 2 of 112A_1_2, the transmission signal group 1 of 112A_2_1, the transmission signal group 2 of 112A_2_2, the transmission signal group 3 of 112A_2_3, and the transmission signal group 4 of 112A_2_4, and selects the transmission signal group 1 of 112A_1_1 using antenna port 63 of 590E_63, the transmission signal group 2 of 112A_1_2 using antenna port 4 of 590E_4, the transmission signal group 1 of 112A_2_1 using antenna port 3 of 590E_3, and the transmission signal group 4 of 112A_2_4 based on information on the antenna port to be used, which is included in the control signal 192A. It is decided to transmit transmission signal group 2 of 112A_2_2 using port 53, transmission signal group 3 of 112A_2_3 using antenna port 23 of 590E_23, and transmission signal group 4 of 112A_2_4 using antenna port 590E_59, and transmission signal group 1 of 112A_1_1 is output as signal group 531E_63, transmission signal group 2 of 112A_1_2 is output as signal group 531E_4, transmission signal group 1 of 112A_2_1 is output as signal group 531E_3, transmission signal group 2 of 112A_2_2 is output as signal group 531E_53, transmission signal group 3 of 112A_2_3 is output as signal group 531E_23, and transmission signal group 4 of 112A_2_4 is output as signal group 531E_59. Then, signal group 531E_63 is output as radio waves from antenna port 63 of 590E_63, signal group 531E_4 is output as radio waves from antenna port 4 of 590E_4, signal group 531E_3 ​​is output as radio waves from antenna port 3 of 590E_3, signal group 531E_53 is output as radio waves from antenna port 53 of 590E_53, signal group 531E_23 is output as radio waves from antenna port 23 of 590E_23, and signal group 531E_59 is output as radio waves from antenna port 59 of 590E_59.

[0372] In this way, each group of transmission signals for the first antenna module may be transmitted using one antenna port, and each group of transmission signals for the second antenna module may be transmitted using one antenna port.

[0373] There may be a plurality of groups of transmission signals for the first antenna module, and there may be a plurality of groups of transmission signals for the second antenna module.

[0374] An example of operation will be described with reference to FIG. 5E. For example, as shown in FIG. 5F2, selection unit 530E receives control signal 192A, transmission signal group 1 of 112A_1_1, transmission signal group 1 of 112A_2_1, and transmission signal group 2 of 112A_2_2 as input, and determines, based on information about the antenna ports to be used included in control signal 192A, to transmit transmission signal group 1 of 112A_1_1 using antenna port 46 of 590E_46, transmission signal group 1 of 112A_2_1 using antenna port 0 of 590E_0, and transmission signal group 2 of 112A_2_2 using antenna port 61 of 590E_61, and outputs transmission signal group 1 of 112A_1_1 as signal group 531E_46, transmission signal group 1 of 112A_2_1 as signal group 531E_0, and transmission signal group 2 of 112A_2_2 as signal group 531E_61. Then, signal group 531E_46 is output as radio waves from antenna port 46 of 590E_46, signal group 531E_0 is output as radio waves from antenna port 0 of 590E_0, and signal group 531E_61 is output as radio waves from antenna port 61 of 590E_61.

[0375] In this way, each group of transmission signals for the first antenna module may be transmitted using one antenna port, and each group of transmission signals for the second antenna module may be transmitted using one antenna port.

[0376] There may be one group of transmit signals for the first antenna module, and there may be multiple groups of transmit signals for the second antenna module.

[0377] An example of operation will be described with reference to FIG. 5E. For example, as shown in FIG. 5F3, selection unit 530E receives control signal 192A, transmission signal group 1 of 112A_1_1, transmission signal group 2 of 112A_1_2, and transmission signal group 1 of 112A_2_1 as input, and determines, based on information about the antenna ports to be used included in control signal 192A, to transmit transmission signal group 1 of 112A_1_1 using antenna port 37 of 590E_37, transmission signal group 2 of 112A_1_2 using antenna port 9 of 590E_9, and transmission signal group 1 of 112A_2_1 using antenna port 60 of 590E_60, and outputs transmission signal group 1 of 112A_1_1 as signal group 531E_37, transmission signal group 2 of 112A_1_2 as signal group 531E_9, and transmission signal group 1 of 112A_2_1 as signal group 531E_60. Then, signal group 531E_37 is output as radio waves from antenna port 37 of 590E_37, signal group 531E_9 is output as radio waves from antenna port 9 of 590E_9, and signal group 531E_60 is output as radio waves from antenna port 60 of 590E_60.

[0378] In this way, each group of transmission signals for the first antenna module may be transmitted using one antenna port, and each group of transmission signals for the second antenna module may be transmitted using one antenna port.

[0379] There may be a plurality of groups of transmission signals for the first antenna module, and there may be one group of transmission signals for the second antenna module.

[0380] Figure 5G shows an example of the configuration around the antenna ports when antenna ports are provided in place of the "first antenna module v of 106A_1_v" and the "second antenna module #w of 106A_2_w" in the base station having the configurations of Figures 1A1 and 1B. Note that in Figure 5G, components that operate in the same way as in Figures 1A and 1B are assigned the same numbers, and some explanations of parts that have already been explained will be omitted.

[0381] Selector 530G receives control signal 192A as input and selects an antenna port based on information about the antenna port to be used, which information is included in control signal 192A.

[0382] Then, the selector 530G uses the selected antenna port to transmit the transmission signals included in the transmission signal group v of 112A_1_v and the transmission signals included in the transmission signal group #w of 112A_2_w.

[0383] For example, when antenna port 0 of 590G_0 is selected as the antenna port that transmits a transmission signal included in a transmission signal group, the selection unit 530G outputs "a transmission signal included in any of the transmission signal groups v of 112A_1_v" or "a transmission signal included in any of the transmission signal groups #w of 112A_2_w" as signal 541G_0, and signal 541G_0 is output as a radio wave from antenna port 0 of 590G_0. Note that antenna port 0 of 590G_0 may receive the control signal 192A as input, and antenna port 0 of 590G_0 may perform beamforming (directivity control) based on the control signal 192A.

[0384] Therefore, when antenna port p of 590G_p is selected as the antenna port that transmits a transmission signal included in a transmission signal group, the selection unit 530G outputs "a transmission signal included in any of the transmission signal groups v of 112A_1_v" or "a transmission signal included in any of the transmission signal groups #w of 112A_2_w" as signal 541G_p, and signal 541G_p is output as a radio wave from antenna port p of 590G_p. Note that antenna port p of 590G_p may receive control signal 192A as input, and antenna port p of 590G_p may perform beamforming (directivity control) based on control signal 192A. Note that p can be represented by an integer between 0 and 511.

[0385] Therefore, "antenna port 0 of 590G_0 to antenna port 511 of 590G_511" are antenna ports that can transmit one of the transmission signals included in the transmission signal group. Also, "antenna port 0 of 590G_0 to antenna port 511 of 590G_511" are antenna ports for the first antenna module and the second antenna module.

[0386] An example of operation will be described with reference to FIG. 5G. For example, as shown in FIG. 5H1 , the selection unit 530G receives as input the control signal 192A, the transmission signal group 1 of 112A_1_1, the transmission signal group 2 of 112A_1_2, the transmission signal group 1 of 112A_2_1, and the transmission signal group 2 of 112A_2_2, and selects the transmission signal group 1 of 112A_1_1 using “antenna port 30 of 590G_30, antenna port 510 of 590G_510, antenna port 259 of 590G_259, and antenna port 9 of 590G_9”, the transmission signal group 2 of 112A_1_2 using “antenna port 92 of 590G_92, antenna port 360 of 590G_360, antenna port 503 of 590G_503, and antenna port 157 of 590G_157”, and the transmission signal group 2 of 112A_1_2 using “antenna port 92 of 590G_92, antenna port 360 of 590G_360, antenna port 503 of 590G_503, and antenna port 157 of 590G_157”, based on the information on the antenna ports to be used included in the control signal 192A. It is determined that transmission signal group 1 of 112A_2_1 will be transmitted using "antenna port 4 of 590G_4 and antenna port 500 of 590G_500," and transmission signal group 2 of 112A_2_2 will be transmitted using "antenna port 16 of 590G_16 and antenna port 312 of 590G_312," and transmission signal group 1 of 112A_1_1 will be transmitted using "signal 541G_30, signal 541G_510, signal 541G_511, signal 541G_512." The group 2 of transmission signals of 112A_1_1 is set to "signal 541G_92, signal 541G_360, signal 541G_503, signal 541G_157", the group 1 of transmission signals of 112A_2_1 is set to "signal 541G_4, signal 541G_500", and the group 2 of transmission signals of 112A_2_2 is set to "signal 541G_16, signal 541G_312". In other words, the group 1 of transmission signals of 112A_1_1 includes four transmission signals, the group 2 of transmission signals of 112A_1_2 includes four transmission signals, the group 1 of transmission signals of 112A_2_1 includes two transmission signals, and the group 2 of transmission signals of 112A_2_2 includes two transmission signals.

[0387] Then, signal 541G_30 is output as radio waves from antenna port 30 of 590G_30, signal 541G_510 is output as radio waves from antenna port 510 of 590G_510, signal 541G_259 is output as radio waves from antenna port 259 of 590G_259, signal 541G_9 is output as radio waves from antenna port 9 of 590G_9, signal 541G_92 is output as radio waves from antenna port 92 of 590G_92, and signal 541G_360 is output as radio waves from antenna port 360 of 590G_360, Signal 541G_503 is output as radio waves from antenna port 503 of 590G_503, signal 541G_157 is output as radio waves from antenna port 157 of 590G_157, signal 541G_4 is output as radio waves from antenna port 4 of 590G_4, signal 541G_500 is output as radio waves from antenna port 500 of 590G_500, signal 541G_16 is output as radio waves from antenna port 16 of 590G_16, and signal 541G_312 is output as radio waves from antenna port 312 of 590G_312.

[0388] In this way, multiple groups of transmission signals for the first antenna module may be transmitted using multiple antenna ports, and multiple groups of transmission signals for the second antenna module may be transmitted using multiple antenna ports.

[0389] An example of operation related to Fig. 5G will be described. For example, as shown in Fig. 5H2, a selection unit 530G receives as input the control signal 192A, the transmission signal group 1 of 112A_1_1, the transmission signal group 2 of 112A_1_2, the transmission signal group 1 of 112A_2_1, and the transmission signal group 2 of 112A_2_2, and selects "antenna port 5 of 590G_5, antenna port 301 of 590G_301, antenna port 409 of 590G_409, The transmission signal group 1 of 112A_1_1 is transmitted using the antenna port 14 of 590G_14, the antenna port 20 of 590G_20, the antenna port 367 of 590G_367, the antenna port 41 of 590G_41, and the antenna port 87 of 590G_87, and the transmission signal group 2 of 112A_1_1 is transmitted using the antenna port 128 of 590G_128, the antenna port 140 of 590G_140, the antenna port 494 of 590G_494, and the antenna port 87 of 590G_87. It is determined that transmission signal group 2 of 112A_1_2 will be transmitted using "antenna port 216 of 590G_258," transmission signal group 1 of 112A_2_1 will be transmitted using "antenna port 258 of 590G_258, antenna port 302 of 590G_302," and transmission signal group 2 of 112A_2_2 will be transmitted using "antenna port 39 of 590G_39." It also determines that transmission signal group 1 of 112A_1_1 will be transmitted using "signal 541G_5, signal 541G_301, signal 541G_409, signal 541G_509, signal 541G_301, signal 541G_409 ... The transmission signal group 2 of 112A_1_2 is output as "signal 541G_14, signal 541G_20, signal 541G_367, signal 541G_41, signal 541G_87", the transmission signal group 2 of 112A_1_2 is output as "signal 541G_128, signal 541G_140, signal 541G_494, signal 541G_216", the transmission signal group 1 of 112A_2_1 is output as "signal 541G_258, signal 541G_302", and the transmission signal group 2 of 112A_2_2 is output as "signal 541G_39".

[0390] In other words, transmission signal group 1 of 112A_1_1 includes eight transmission signals, transmission signal group 2 of 112A_1_2 includes four transmission signals, transmission signal group 1 of 112A_2_1 includes two transmission signals, and transmission signal group 2 of 112A_2_2 includes one transmission signal.

[0391] Then, signal 541G_5 is output as radio waves from antenna port 5 of 590G_5, signal 541G_301 is output as radio waves from antenna port 301 of 590G_301, signal 541G_409 is output as radio waves from antenna port 409 of 590G_409, signal 541G_14 is output as radio waves from antenna port 14 of 590G_14, signal 541G_20 is output as radio waves from antenna port 20 of 590G_20, signal 541G_367 is output as radio waves from antenna port 367 of 590G_367, signal 541G_41 is output as radio waves from antenna port 41 of 590G_41, and signal 541G_87 is output as radio waves from antenna port 590G_87. signal 541G_128 is output as a radio wave from antenna port 128 of 590G_128; signal 541G_140 is output as a radio wave from antenna port 140 of 590G_140; signal 541G_494 is output as a radio wave from antenna port 494 of 590G_494; signal 541G_216 is output as a radio wave from antenna port 216 of 590G_216; signal 541G_258 is output as a radio wave from antenna port 258 of 590G_258; signal 541G_302 is output as a radio wave from antenna port 302 of 590G_302; and signal 541G_39 is output as a radio wave from antenna port 39 of 590G_39.

[0392] In this way, a plurality of groups of transmission signals for the first antenna module may be transmitted using a plurality of antenna ports, and the number of antenna ports used may differ depending on the group of transmission signals.

[0393] Furthermore, a plurality of groups of transmission signals for the second antenna module may be transmitted using a plurality of antenna ports, and in this case, the number of antenna ports used may differ depending on the groups of transmission signals.

[0394] An example of operation related to Fig. 5G will be described. For example, as shown in Fig. 5H3, a selection unit 530G receives control signal 192A, transmission signal group 1 of 112A_1_1, transmission signal group 1 of 112A_2_1, and transmission signal group 2 of 112A_2_2 as input, and selects transmission signal group 1 of 112A_1_1 using "antenna port 30 of 590G_30, antenna port 68 of 590G_68, antenna port 470 of 590G_470, and antenna port 239 of 590G_239" based on information on the antenna port to be used, which is included in the control signal 192A. It is decided that transmission signal group 1 of 112A_2_1 will be transmitted using "antenna port 1" and transmission signal group 2 of 112A_2_2 will be transmitted using "antenna port 356 of 590G_356 and antenna port 497 of 590G_497", and transmission signal group 1 of 112A_1_1 is output as "signal 541G_30, signal 541G_68, signal 541G_470, signal 541G_239", transmission signal group 1 of 112A_2_1 is output as "signal 541G_278, signal 541G_1", and transmission signal group 2 of 112A_2_2 is output as "signal 541G_356, signal 541G_497". That is, the transmission signal group 1 of 112A_1_1 includes four transmission signals, the transmission signal group 1 of 112A_2_1 includes two transmission signals, and the transmission signal group 2 of 112A_2_2 includes two transmission signals.

[0395] Then, signal 541G_30 is output as radio waves from antenna port 30 of 590G_30, signal 541G_68 is output as radio waves from antenna port 68 of 590G_68, signal 541G_470 is output as radio waves from antenna port 470 of 590G_470, signal 541G_239 is output as radio waves from antenna port 239 of 590G_239, signal 541G_278 is output as radio waves from antenna port 278 of 590G_278, signal 541G_1 is output as radio waves from antenna port 1 of 590G_1, signal 541G_356 is output as radio waves from antenna port 356 of 590G_356, and signal 541G_497 is output as radio waves from antenna port 497 of 590G_497.

[0396] In this way, one group of transmission signals for the first antenna module may be transmitted using multiple antenna ports, and multiple groups of transmission signals for the second antenna module may be transmitted using multiple antenna ports.

[0397] An example of operation related to Fig. 5G will be described. For example, as shown in Fig. 5H4, the selection unit 530G receives the control signal 192A, the transmission signal group 1 of 112A_1_1, the transmission signal group 2 of 112A_1_2, and the transmission signal group 1 of 112A_2_1 as input, and selects the transmission signal group 1 of 112A_1_1 using "antenna port 2 of 590G_2, antenna port 3 of 590G_3, antenna port 298 of 590G_298, and antenna port 5 of 590G_5" based on the information on the antenna ports to be used included in the control signal 192A. It is decided that transmission signal group 2 of 112A_1_2 will be transmitted using "antenna port 473 of 590G_473," and transmission signal group 1 of 112A_2_1 will be transmitted using "antenna port 22 of 590G_22, antenna port 23 of 590G_23," and transmission signal group 1 of 112A_1_1 is output as "signal 541G_2, signal 541G_3, signal 541G_298, signal 541G_5," transmission signal group 2 of 112A_1_2 is output as "signal 541G_25, signal 541G_9, signal 541G_125, signal 541G_473," and transmission signal group 1 of 112A_2_1 is output as "signal 541G_22, signal 541G_23." That is, the transmission signal group 1 of 112A_1_1 includes four transmission signals, the transmission signal group 2 of 112A_1_2 includes four transmission signals, and the transmission signal group 1 of 112A_2_1 includes two transmission signals.

[0398] Then, signal 541G_2 is output as radio waves from antenna port 2 of 590G_2, signal 541G_3 is output as radio waves from antenna port 3 of 590G_3, signal 541G_298 is output as radio waves from antenna port 298 of 590G_298, signal 541G_5 is output as radio waves from antenna port 5 of 590G_5, signal 541G_25 is output as radio waves from antenna port 25 of 590G_25, and signal 541G_298 is output as radio waves from antenna port 3 of 590G_298. Signal 41G_9 is output as radio waves from antenna port 9 of 590G_9, signal 541G_125 is output as radio waves from antenna port 125 of 590G_125, signal 541G_473 is output as radio waves from antenna port 473 of 590G_473, signal 541G_22 is output as radio waves from antenna port 22 of 590G_22, and signal 541G_23 is output as radio waves from antenna port 23 of 590G_23.

[0399] In this way, multiple groups of transmission signals for the first antenna module may be transmitted using multiple antenna ports, and one group of transmission signals for the second antenna module may be transmitted using multiple antenna ports.

[0400] Using the above-described method of using antenna ports as an example, the base station can transmit a group of transmission signals for the first antenna module and a group of transmission signals for the second antenna module, thereby improving the data reception quality at the terminal with which the base station communicates, and thereby improving the data transmission efficiency of the system.

[0401] As a variation of the above, the number of "groups of transmission signals for the first antenna module" transmitted by the base station may be changed depending on the communication conditions, radio wave propagation conditions, destination terminal, etc. Similarly, the number of "groups of transmission signals for the second antenna module" transmitted by the base station may be changed depending on the communication conditions, radio wave propagation conditions, destination terminal, etc.

[0402] Additionally, the number of antenna ports used for the "group of transmission signals for the first antenna module" transmitted by the base station may be changed depending on the communication status, radio wave propagation status, destination terminal, etc. Similarly, the number of antenna ports used for the "group of transmission signals for the second antenna module" transmitted by the base station may be changed depending on the communication status, radio wave propagation status, destination terminal, etc.

[0403] In this embodiment and in this specification, the term "antenna module" is used to describe the examples, but the antenna module can be called by a different term (for example, antenna, antenna group, antenna unit, antenna array, etc., but is not limited to these examples) and implemented in the same manner. In this case, the conditions, constraints, etc. described in this embodiment and this specification will apply.

[0404] Using Figures 5A, 5C, 5E, and 5G, communication devices such as base stations, TRPs (Transmission / Reception points (TX / RX)), repeaters, and terminals) that have antenna ports corresponding to antenna modules have been described. Using Figures 5A, 5C, 5E, and 5G, a communication device that has an "antenna port corresponding to an antenna module" may also have an antenna port other than the "antenna port corresponding to the antenna module." In this case, if the communication device determines to "transmit a transmission signal using an antenna module," it will specify the "antenna port corresponding to the antenna module" described in Figures 5A, 5C, 5E, 5G, etc., and transmit the signal. When transmitting a transmission signal using a different transmission method, the communication device may specify an antenna port other than the "antenna port corresponding to the antenna module" to transmit the transmission signal.

[0405] In this embodiment, the description has been given using a base station, but the base station can be implemented as any of "TRP (Tx (Transmission) / Rx (Reception) point) (TX (Transmitter) / RX (Receiver) point), repeater, terminal, access point, broadcasting station, eNB (e Node B), gNB (g Node B) node, server, satellite, etc." It is possible to implement it in the same way. Therefore, the base station of this embodiment may be called "base station, TRP, repeater, terminal, access point, broadcasting station, eNB, gNB, node, server, satellite, etc." However, it is not limited to this.

[0406] Furthermore, although the present embodiment has been described using a terminal, the terminal can be implemented in the same manner as any of "mobile devices such as mobile phones, smartphones, tablets, laptops, PCs, personal computers, home appliances (household electrical appliances), factory equipment, IoT (Internet of Things) devices, and other communication and broadcasting devices, or "mobile devices such as cars (e.g., electric vehicles), bicycles (e.g., electric bicycles, electrically assisted bicycles), motorcycles, ships, satellites, aircraft, drones, robots, etc." Therefore, the terminal of the present embodiment may be referred to as "mobile phones, smartphones, tablets, laptops, PCs, personal computers, home appliances (household electrical appliances), factory equipment, IoT devices, and other communication and broadcasting devices, or mobile devices such as the above." However, the present invention is not limited to this.

[0407] Therefore, the terminal may use a transmission method using the antenna module described in this embodiment, and the terminal may have the configuration of the device described in this embodiment.

[0408] 1A1 and 1B, the first antenna module v of 106A_1_v and the second antenna module #w of 106A_2_w, which are the transmitting antennas, may be used as receiving antennas. In this case, modulated signals transmitted by the terminal with which the communication is being conducted may be received.

[0409] 5A, 5C, 5E, and 5G may be used as a receiving antenna, and in this case, a modulated signal transmitted by a terminal with which communication is being performed may be received.

[0410] The configuration methods of devices such as base stations and terminals described in this embodiment and the communication methods implemented (e.g., antenna module configuration, number of antenna modules, antenna port configuration, number of antenna ports, precoding method, frame configuration, number of transmitted signals, number of received signals, etc.) are considered to be examples described in this specification, but are not limited to these examples.

[0411] In addition, a communication device may transmit a modulated signal using an antenna port, but in this case, a unique signal is assigned to each antenna port as an RS (reference signal), such as a DMRS (demodulation reference signal), in order to notify the communication partner of the number of the antenna port being used (so that the communication partner can identify the antenna port being used to transmit the modulated signal).

[0412] When a communication device modulates a signal, it also transmits a (unique) RS corresponding to the antenna port used to transmit the modulated signal.

[0413] At this time, a unique signal may be assigned to the RS so that the RS can identify whether or not the antenna module is being used, whether or not the first antenna module is being used, and whether or not the second antenna module is being used.

[0414] For example, there may be a unique signal when transmitting using the antenna module, and the communication device will transmit a signal that includes this unique signal when transmitting using the antenna module.

[0415] There may be a unique signal when transmitting using the first antenna module, and the communication device will transmit a signal including this unique signal when transmitting using the antenna module.

[0416] There may be a unique signal when transmitting using the second antenna module, and the communication device will transmit a signal including this unique signal when transmitting using the antenna module.

[0417] (Embodiment 2) In this embodiment 2, a modified example in which the base station described in embodiment 1 is applied to a TRP (Tx (Transmission) / Rx (Reception) point) (TX (Transmitter) / RX (Receiver) point) will be described.

[0418] 6A1, 6A2, and 6A3 show examples of the states of TRPs and terminals. TRP #1_1 of 601_1 transmits a group of transmission signals using the first antenna module. TRP #1_1 of 601_1 may also transmit a group of transmission signals using the second antenna module. Detailed operations will be described later.

[0419] The TRP#2_1 of 602_1 transmits the transmission signal group using the second antenna module. The detailed operation will be explained later.

[0420] Therefore, TRP#2_i of 602_i transmits a transmission signal group using the second antenna module, where i is an integer between 1 and Y, and Y is an integer greater than or equal to 1 or an integer greater than or equal to 2. The detailed operation will be explained later.

[0421] "TRP#1_1 of 601_1", "TRP#2_1 of 602_1, TRP#2_2 of 602_2, ..., TRP#2_Y of 602_Y" may be able to communicate wirelessly as shown in FIG. 6A1.

[0422] "TRP#1_1 of 601_1", "TRP#2_1 of 602_1, TRP#2_2 of 602_2, ..., TRP#2_Y of 602_Y" may be able to communicate via wire, as shown in FIG. 6A2.

[0423] "TRP#1_1 of 601_1", "TRP#2_1 of 602_1, TRP#2_2 of 602_2, ..., TRP#2_Y of 602_Y" may be able to communicate via device 603 as shown in FIG. 6A3.

[0424] 6B1, 6B2, and 6B3 show examples of the states of TRPs and terminals. TRP #1_1 of 601_1 transmits a group of transmission signals using the first antenna module. TRP #1_1 of 601_1 may also transmit a group of transmission signals using the second antenna module. Detailed operations will be described later.

[0425] Therefore, TRP #1_k of 601_k transmits the transmission signal group using the first antenna module. Alternatively, TRP #1_k of 601_k may transmit the transmission signal group using the second antenna module. Here, k is an integer between 1 and X, and X is an integer greater than or equal to 1 or an integer greater than or equal to 2. Detailed operation will be described later.

[0426] The TRP#2_1 of 602_1 transmits the transmission signal group using the second antenna module. The detailed operation will be explained later.

[0427] Therefore, TRP#2_i of 602_i transmits a transmission signal group using the second antenna module, where i is an integer between 1 and Y, and Y is an integer greater than or equal to 1 or an integer greater than or equal to 2. The detailed operation will be explained later.

[0428] "TRP#1_1 of 601_1, TRP#1_2 of 601_2, ..., TRP#1_X of 601_X" and "TRP#2_1 of 602_1, TRP#2_2 of 602_2, ..., TRP#2_Y of 602_Y" may be capable of wireless communication as shown in FIG. 6B1.

[0429] "TRP#1_1 of 601_1, TRP#1_2 of 601_2, ..., TRP#1_X of 601_X" and "TRP#2_1 of 602_1, TRP#2_2 of 602_2, ..., TRP#2_Y of 602_Y" may be able to communicate via wired connection as shown in Figure 6B2.

[0430] "TRP#1_1 of 601_1, TRP#1_2 of 601_2, ..., TRP#1_X of 601_X" and "TRP#2_1 of 602_1, TRP#2_2 of 602_2, ..., TRP#2_Y of 602_Y" may be able to communicate via device 603, as shown in FIG. 6B3.

[0431] Next, examples of the configuration and operation of TRP#1_k of 601_k and TRP#2_i of 602_i in "Figures 6A1, 6A2, 6A3" and "Figures 6B1, 6B2, 6B3" will be described.

[0432] TRP #1_k of 601_k may have, for example, the configuration of "FIG. 1A1," the configuration of "FIG. 1B," the configuration of "FIG. 1A1 to which FIG. 1A2 is applied," or the configuration of "FIG. 1B to which FIG. 1A2 is applied." As described in the first embodiment, TRP #1_k of 601_k may have antenna ports as the first antenna module and the second antenna module. The operations of FIGS. 1A1, 1B, and 1A2 have already been described, and therefore some detailed descriptions of the operations will be omitted.

[0433] When TRP#1_k of 601_k has the configuration of "Figure 1A1", the configuration of "Figure 1B", the configuration of "Figure 1A1 applied with Figure 1A2", or the configuration of "Figure 1B applied with Figure 1A2", the modulated signal ♭u of 103A_u is transmitted using the first antenna module v of 106A_1_v.

[0434] As described above, TRP #1_k of 601_k may transmit modulated signal ♭u of 103A_u using second antenna module #w of 106A_2_w.

[0435] The detailed operations of these have been explained in the first embodiment, so the explanation will be omitted.

[0436] TRP#2_i of 602_i may have, for example, the configuration of "FIG. 1A1," the configuration of "FIG. 1B," the configuration of "FIG. 1A1 to which FIG. 1A2 is applied," or the configuration of "FIG. 1B to which FIG. 1A2 is applied." As described in the first embodiment, TRP#2_i of 602_i may have antenna ports as the first antenna module and the second antenna module. The operations of FIGS. 1A1, 1B, and 1A2 have already been described, and therefore some detailed descriptions of the operations will be omitted.

[0437] When TRP#2_i of 602_i has the configuration of "Figure 1A1", the configuration of "Figure 1B", the configuration of "Figure 1A1 applied with Figure 1A2", or the configuration of "Figure 1B applied with Figure 1A2", the modulated signal ♭u of 103A_u is transmitted using the second antenna module #w of 106A_2_w.

[0438] The detailed operations of these have been explained in the first embodiment, so the explanation will be omitted.

[0439] Note that "modulated signal ♭1 of 103A_1 transmitted by TRP#1_k of 601_k" and "modulated signal ♭1 of 103A_1 transmitted by TRP#2_i of 602_i" are the same signal. Therefore, "modulated signal ♭f of 103A_f transmitted by TRP#1_k of 601_k" and "modulated signal ♭f of 103A_f transmitted by TRP#2_i of 602_i" are the same signal. (f is an integer between 1 and K)

[0440] It is assumed that the "modulated signal ♭u of 103A_u" transmitted by TRP#1_k of 601_k using the first antenna module v of 106A_1_v exists at frequency AA1 and time A1, as shown in Figure 4. (Note that when TRP#1_k of 601_k transmits the "modulated signal ♭u of 103A_u" using the second antenna module 106A_2_w, it is assumed that the "modulated signal ♭u of 103A_u" exists at frequency AA1 and time A1, as shown in Figure 4.)

[0441] Similarly, it is assumed that the "modulated signal ♭u of 103A_u" transmitted by TRP#2_i of 602_i using the second antenna module #w of 106A_2_w also exists at frequency AA1 and time A1.

[0442] Therefore, the transmission signal group v of 112A_1_v transmitted by TRP #1_k of 601_k using the first antenna module v of 106A_1_v, and the transmission signal group #w of 112A_2_w transmitted by TRP #2_i of 602_i using the second antenna module #w of 106A_2_w, exist at frequency AA1 and time A1 (the same (common) frequency, the same (common) time). (Note that when TRP #1_k of 601_k transmits the transmission signal group #w of 112A_2_w using the second antenna module of 106A_2_w, the transmission signal group #w of 112A_2_w exists at frequency AA1 and time A1.)

[0443] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0444] It should be noted that TRP #2_i of 602_i, which is equipped with the configuration of "FIG. 1A1," the configuration of "FIG. 1B," the configuration of "FIG. 1A1 with FIG. 1A2 applied," and the configuration of "FIG. 1B with FIG. 1A2 applied," and which is performing the above-described operation, can transmit modulated signal ♭u of 103A_u via first antenna module v, depending on the communication situation, radio wave propagation situation, destination terminal, etc. In other words, TRP #2_i of 602_i can also become TRP #1_k of 601_k, depending on the communication situation, radio wave propagation situation, destination terminal, etc.

[0445] Similarly, TRP #1_k of 601_k, which has the configuration of "FIG. 1A1," the configuration of "FIG. 1B," the configuration of "FIG. 1A1 with FIG. 1A2 applied," and the configuration of "FIG. 1B with FIG. 1A2 applied," and which is performing the above-mentioned operation, can transmit modulated signal ♭u of 103A_u without using the first antenna module v, depending on the communication situation, radio wave propagation situation, destination terminal, etc. In other words, TRP #1_k of 601_k can also become TRP #2_i of 602_i, depending on the communication situation, radio wave propagation situation, destination terminal, etc.

[0446] Therefore, since it is possible to set an appropriate TRP for each terminal with which communication is being carried out, the effect of improving the data reception quality at the terminal can be obtained, and this can also have the effect of improving the data transmission efficiency of the system.

[0447] Another example of the configuration and operation of TRP#1_k of 601_k and TRP#2_i of 602_i in "Figures 6A1, 6A2, 6A3" and "Figures 6B1, 6B2, 6B3" will be described.

[0448] TRP #1_k of 601_k may have, for example, the configuration of "FIG. 1A1," the configuration of "FIG. 1B," the configuration of "FIG. 1A1 to which FIG. 1A2 is applied," or the configuration of "FIG. 1B to which FIG. 1A2 is applied." As described in the first embodiment, TRP #1_k of 601_k may have antenna ports as the first antenna module and the second antenna module. The operations of FIGS. 1A1, 1B, and 1A2 have already been described, and therefore some detailed descriptions of the operations will be omitted.

[0449] When TRP#1_k of 601_k has the configuration of "Figure 1A1", the configuration of "Figure 1B", the configuration of "Figure 1A1 applied with Figure 1A2", or the configuration of "Figure 1B applied with Figure 1A2", the modulated signal ♭u of 103A_u is transmitted using the first antenna module v of 106A_1_v.

[0450] As mentioned above, TRP #1_k of 601_k may transmit modulated signal ♭u of 103A_u using second antenna module #w of 106A_2_w. Detailed operations of these have been explained in the first embodiment, so explanation will be omitted here.

[0451] TRP#2_i of 602_i may have, for example, the configuration of "Figure 8A", the configuration of "Figure 8B", the configuration of "Figure 8A applying Figure 1A2", or the configuration of "Figure 8B applying Figure 1A2".

[0452] 8A shows an example of the configuration of TRP#2_i of 602_i, and components that operate in the same manner as in FIG. 1A1 are assigned the same numbers. FIG. 8A differs from FIG. 1A1 in that it does not include components related to the first antenna module. Note that, as described in the first embodiment, TRP#2_i of 602_i may include an antenna port as the second antenna module.

[0453] The components of FIG. 8A have been described in the first embodiment using FIGS. 1A1, 1B, and 1A2, so a detailed description of the operations will be omitted.

[0454] In Fig. 8A, the transmission processing unit ♭u (u is an integer of 1 to K) of 102A_u may have the configuration as shown in Fig. 1A2. Fig. 1A2 has been described in the first embodiment, so its description will be omitted.

[0455] 8B shows an example of the configuration of TRP#2_i of 602_i, and components that operate in the same manner as those in FIG. 1B are assigned the same numbers. FIG. 8B differs from FIG. 1B in that it does not include components related to the first antenna module. Note that, as described in the first embodiment, TRP#2_i of 602_i may include an antenna port as the second antenna module.

[0456] The components of FIG. 8B have been described in the first embodiment using FIGS. 1A1, 1B, and 1A2, so a detailed description of the operations will be omitted.

[0457] In Fig. 8B, the transmission processing unit ♭u (u is an integer of 1 to K) of 102A_u may have the configuration as shown in Fig. 1A2. Fig. 1A2 has been described in the first embodiment, so its description will be omitted.

[0458] When TRP#2_i of 602_i has the configuration of "Figure 8A", the configuration of "Figure 8B", the configuration of "Figure 8A with Figure 1A2 applied", or the configuration of "Figure 8B with Figure 1A2 applied", the modulated signal ♭u of 103A_u is transmitted using the second antenna module #w of 106A_2_w.

[0459] The detailed operations of these have been explained in the first embodiment, so the explanation will be omitted.

[0460] Note that "modulated signal ♭1 of 103A_1 transmitted by TRP#1_k of 601_k" and "modulated signal ♭1 of 103A_1 transmitted by TRP#2_i of 602_i" are the same signal. Therefore, "modulated signal ♭f of 103A_f transmitted by TRP#1_k of 601_k" and "modulated signal ♭f of 103A_f transmitted by TRP#2_i of 602_i" are the same signal. (f is an integer between 1 and K)

[0461] It is assumed that the "modulated signal ♭u of 103A_u" transmitted by TRP#1_k of 601_k using the first antenna module v of 106A_1_v exists at frequency AA1 and time A1, as shown in Figure 4. (Note that when TRP#1_k of 601_k transmits the "modulated signal ♭u of 103A_u" using the second antenna module 106A_2_w, it is assumed that the "modulated signal ♭u of 103A_u" exists at frequency AA1 and time A1, as shown in Figure 4.)

[0462] Similarly, it is assumed that the "modulated signal ♭u of 103A_u" transmitted by TRP#2_i of 602_i using the second antenna module #w of 106A_2_w also exists at frequency AA1 and time A1.

[0463] Therefore, the transmission signal group v of 112A_1_v transmitted by TRP #1_k of 601_k using the first antenna module v of 106A_1_v, and the transmission signal group #w of 112A_2_w transmitted by TRP #2_i of 602_i using the second antenna module #w of 106A_2_w, exist at frequency AA1 and time A1 (the same (common) frequency, the same (common) time). (Note that when TRP #1_k of 601_k transmits the transmission signal group #w of 112A_2_w using the second antenna module of 106A_2_w, the transmission signal group #w of 112A_2_w exists at frequency AA1 and time A1.)

[0464] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0465] It should be noted that TRP #1_k of 601_k, which has the configuration of "FIG. 1A1," the configuration of "FIG. 1B," the configuration of "FIG. 1A1 applying FIG. 1A2," and the configuration of "FIG. 1B applying FIG. 1A2," and which is performing the above-described operation, can transmit modulated signal ♭u of 103A_u without using the first antenna module v, depending on the communication situation, radio wave propagation situation, destination terminal, etc. In other words, TRP #1_k of 601_k can also become TRP #2_i of 602_i, depending on the communication situation, radio wave propagation situation, destination terminal, etc.

[0466] Furthermore, when TRP #1_k of 601_k transmits a transmission signal group #w of 112A_2_w using the second antenna module #w of 106A_2_w, the "modulated signal ♭u of 103A_u" will be present at frequency AA1 and time A1, as shown in Figure 4.

[0467] Therefore, since it is possible to set an appropriate TRP for each terminal with which communication is being carried out, the effect of improving the data reception quality at the terminal can be obtained, and this can also have the effect of improving the data transmission efficiency of the system.

[0468] Another example of the configuration and operation of TRP#1_k of 601_k and TRP#2_i of 602_i in "Figures 6A1, 6A2, 6A3" and "Figures 6B1, 6B2, 6B3" will be described.

[0469] TRP#1_k of 601_k may have, for example, the configuration of "Figure 7A", the configuration of "Figure 7B", the configuration of "Figure 7A applying Figure 1A2", or the configuration of "Figure 7B applying Figure 1A2".

[0470] 7A shows an example of the configuration of TRP #1_k of 601_k, and components that operate in the same manner as in FIG. 1A1 are assigned the same numbers. Figure 7A differs from FIG. 1A1 in that it does not include a second antenna module-related component. Note that, as described in the first embodiment, TRP #1_k of 601_k may include an antenna port as the first antenna module.

[0471] The components of FIG. 7A have been described in the first embodiment using FIGS. 1A1, 1B, and 1A2, so a detailed description of the operations will be omitted.

[0472] In Fig. 7A, the transmission processing unit ♭u (u is an integer of 1 to K) of 102A_u may have the configuration as shown in Fig. 1A2. Fig. 1A2 has been described in the first embodiment, so its description will be omitted.

[0473] 7B shows an example of the configuration of TRP#1_k of 601_k, and components that operate in the same manner as in FIG. 1B are assigned the same numbers. The difference between FIG. 7B and FIG. 1B is that it does not include a part related to the second antenna module. Note that, as described in the first embodiment, TRP#1_k of 601_k may include an antenna port as the first antenna module.

[0474] The components of FIG. 7B have been described in the first embodiment using FIGS. 1A1, 1B, and 1A2, so a detailed description of the operations will be omitted.

[0475] 7B, the transmission processing unit ♭u (u is an integer of 1 to K) of 102A_u may have the configuration as shown in Fig. 1A2. Fig. 1A2 has been described in the first embodiment, so its description will be omitted.

[0476] When TRP#1_k of 601_k has the configuration of "Figure 7A", the configuration of "Figure 7B", the configuration of "Figure 7A with Figure 1A2 applied", or the configuration of "Figure 7B with Figure 1A2 applied", the modulated signal ♭u of 103A_u is transmitted using the first antenna module v of 106A_1_v.

[0477] The detailed operations of these have been explained in the first embodiment, so the explanation will be omitted.

[0478] TRP#2_i of 602_i may have, for example, the configuration of "FIG. 1A1," the configuration of "FIG. 1B," the configuration of "FIG. 1A1 to which FIG. 1A2 is applied," or the configuration of "FIG. 1B to which FIG. 1A2 is applied." As described in the first embodiment, TRP#2_i of 602_i may have antenna ports as the first antenna module and the second antenna module. The operations of FIGS. 1A1, 1B, and 1A2 have already been described, and therefore some detailed descriptions of the operations will be omitted.

[0479] When TRP#2_i of 602_i has the configuration of "Figure 1A1", the configuration of "Figure 1B", the configuration of "Figure 1A1 applied with Figure 1A2", or the configuration of "Figure 1B applied with Figure 1A2", the modulated signal ♭u of 103A_u is transmitted using the second antenna module #w of 106A_2_w.

[0480] The detailed operations of these have been explained in the first embodiment, so the explanation will be omitted.

[0481] Note that "modulated signal ♭1 of 103A_1 transmitted by TRP#1_k of 601_k" and "modulated signal ♭1 of 103A_1 transmitted by TRP#2_i of 602_i" are the same signal. Therefore, "modulated signal ♭f of 103A_f transmitted by TRP#1_k of 601_k" and "modulated signal ♭f of 103A_f transmitted by TRP#2_i of 602_i" are the same signal. (f is an integer between 1 and K)

[0482] It is assumed that the "modulated signal ♭u of 103A_u" transmitted by TRP#1_k of 601_k using the first antenna module v of 106A_1_v exists at frequency AA1 and time A1, as shown in Figure 4. (Note that when TRP#1_k of 601_k transmits the "modulated signal ♭u of 103A_u" using the second antenna module 106A_2_w, it is assumed that the "modulated signal ♭u of 103A_u" exists at frequency AA1 and time A1, as shown in Figure 4.)

[0483] Similarly, it is assumed that the "modulated signal ♭u of 103A_u" transmitted by TRP#2_i of 602_i using the second antenna module #w of 106A_2_w also exists at frequency AA1 and time A1.

[0484] Therefore, the transmission signal group v of 112A_1_v transmitted by TRP #1_k of 601_k using the first antenna module v of 106A_1_v, and the transmission signal group #w of 112A_2_w transmitted by TRP #2_i of 602_i using the second antenna module #w of 106A_2_w, exist at frequency AA1 and time A1 (the same (common) frequency, the same (common) time). (Note that when TRP #1_k of 601_k transmits the transmission signal group #w of 112A_2_w using the second antenna module of 106A_2_w, the transmission signal group #w of 112A_2_w exists at frequency AA1 and time A1.)

[0485] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0486] It should be noted that TRP #2_i of 602_i, which is equipped with the configuration of "FIG. 1A1," the configuration of "FIG. 1B," the configuration of "FIG. 1A1 with FIG. 1A2 applied," and the configuration of "FIG. 1B with FIG. 1A2 applied," and which is performing the above-described operation, can transmit modulated signal ♭u of 103A_u via first antenna module v, depending on the communication situation, radio wave propagation situation, destination terminal, etc. In other words, TRP #2_i of 602_i can also become TRP #1_k of 601_k, depending on the communication situation, radio wave propagation situation, destination terminal, etc.

[0487] Therefore, since it is possible to set an appropriate TRP for each terminal with which communication is being carried out, the effect of improving the data reception quality at the terminal can be obtained, and this can also have the effect of improving the data transmission efficiency of the system.

[0488] Another example of the configuration and operation of TRP#1_k of 601_k and TRP#2_i of 602_i in "Figures 6A1, 6A2, 6A3" and "Figures 6B1, 6B2, 6B3" will be described.

[0489] TRP#1_k of 601_k may have, for example, the configuration of "Figure 7A", the configuration of "Figure 7B", the configuration of "Figure 7A applying Figure 1A2", or the configuration of "Figure 7B applying Figure 1A2".

[0490] 7A shows an example of the configuration of TRP #1_k of 601_k, and components that operate in the same manner as in FIG. 1A1 are assigned the same numbers. Figure 7A differs from FIG. 1A1 in that it does not include a second antenna module-related component. Note that, as described in the first embodiment, TRP #1_k of 601_k may include an antenna port as the first antenna module.

[0491] The components of FIG. 7A have been described in the first embodiment using FIGS. 1A1, 1B, and 1A2, so a detailed description of the operations will be omitted.

[0492] In Fig. 7A, the transmission processing unit ♭u (u is an integer of 1 to K) of 102A_u may have the configuration as shown in Fig. 1A2. Fig. 1A2 has been described in the first embodiment, so its description will be omitted.

[0493] 7B shows an example of the configuration of TRP#1_k of 601_k, and components that operate in the same manner as in FIG. 1B are assigned the same numbers. The difference between FIG. 7B and FIG. 1B is that it does not include a part related to the second antenna module. Note that, as described in the first embodiment, TRP#1_k of 601_k may include an antenna port as the first antenna module.

[0494] The components of FIG. 7B have been described in the first embodiment using FIGS. 1A1, 1B, and 1A2, so a detailed description of the operations will be omitted.

[0495] 7B, the transmission processing unit ♭u (u is an integer of 1 to K) of 102A_u may have the configuration as shown in Fig. 1A2. Fig. 1A2 has been described in the first embodiment, so its description will be omitted.

[0496] When TRP#1_k of 601_k has the configuration of "Figure 7A", the configuration of "Figure 7B", the configuration of "Figure 7A with Figure 1A2 applied", or the configuration of "Figure 7B with Figure 1A2 applied", the modulated signal ♭u of 103A_u is transmitted using the first antenna module v of 106A_1_v.

[0497] The detailed operations of these have been explained in the first embodiment, so the explanation will be omitted.

[0498] TRP#2_i of 602_i may have, for example, the configuration of "Figure 8A", the configuration of "Figure 8B", the configuration of "Figure 8A applying Figure 1A2", or the configuration of "Figure 8B applying Figure 1A2".

[0499] 8A shows an example of the configuration of TRP#2_i of 602_i, and components that operate in the same manner as in FIG. 1A1 are assigned the same numbers. FIG. 8A differs from FIG. 1A1 in that it does not include components related to the first antenna module. Note that, as described in the first embodiment, TRP#2_i of 602_i may include an antenna port as the second antenna module.

[0500] The components of FIG. 8A have been described in the first embodiment using FIGS. 1A1, 1B, and 1A2, so a detailed description of the operations will be omitted.

[0501] In Fig. 8A, the transmission processing unit ♭u (u is an integer of 1 to K) of 102A_u may have the configuration as shown in Fig. 1A2. Fig. 1A2 has been described in the first embodiment, so its description will be omitted.

[0502] 8B shows an example of the configuration of TRP#2_i of 602_i, and components that operate in the same manner as those in FIG. 1B are assigned the same numbers. FIG. 8B differs from FIG. 1B in that it does not include components related to the first antenna module. Note that, as described in the first embodiment, TRP#2_i of 602_i may include an antenna port as the second antenna module.

[0503] The components of FIG. 8B have been described in the first embodiment using FIGS. 1A1, 1B, and 1A2, so a detailed description of the operations will be omitted.

[0504] In Fig. 8B, the transmission processing unit ♭u (u is an integer of 1 to K) of 102A_u may have the configuration as shown in Fig. 1A2. Fig. 1A2 has been described in the first embodiment, so its description will be omitted.

[0505] When TRP#2_i of 602_i has the configuration of "Figure 8A", the configuration of "Figure 8B", the configuration of "Figure 8A with Figure 1A2 applied", or the configuration of "Figure 8B with Figure 1A2 applied", the modulated signal ♭u of 103A_u is transmitted using the second antenna module #w of 106A_2_w.

[0506] The detailed operations of these have been explained in the first embodiment, so the explanation will be omitted.

[0507] Note that "modulated signal ♭1 of 103A_1 transmitted by TRP#1_k of 601_k" and "modulated signal ♭1 of 103A_1 transmitted by TRP#2_i of 602_i" are the same signal. Therefore, "modulated signal ♭f of 103A_f transmitted by TRP#1_k of 601_k" and "modulated signal ♭f of 103A_f transmitted by TRP#2_i of 602_i" are the same signal. (f is an integer between 1 and K)

[0508] It is assumed that the "modulated signal ♭u of 103A_u" transmitted by TRP#1_k of 601_k using the first antenna module v of 106A_1_v exists at frequency AA1 and time A1, as shown in Figure 4. (Note that when TRP#1_k of 601_k transmits the "modulated signal ♭u of 103A_u" using the second antenna module 106A_2_w, it is assumed that the "modulated signal ♭u of 103A_u" exists at frequency AA1 and time A1, as shown in Figure 4.)

[0509] Similarly, it is assumed that the "modulated signal ♭u of 103A_u" transmitted by TRP#2_i of 602_i using the second antenna module #w of 106A_2_w also exists at frequency AA1 and time A1.

[0510] Therefore, the transmission signal group v of 112A_1_v transmitted by TRP #1_k of 601_k using the first antenna module v of 106A_1_v, and the transmission signal group #w of 112A_2_w transmitted by TRP #2_i of 602_i using the second antenna module #w of 106A_2_w, exist at frequency AA1 and time A1 (the same (common) frequency, the same (common) time). (Note that when TRP #1_k of 601_k transmits the transmission signal group #w of 112A_2_w using the second antenna module of 106A_2_w, the transmission signal group #w of 112A_2_w exists at frequency AA1 and time A1.)

[0511] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0512] An example of the configuration and operation of "TRP#1_k of device 603, 601_k, and TRP#2_i of 602_i" in "Figures 6A3" and "6B3" will be described.

[0513] The device 603 may have, for example, the configuration of "FIG. 9A" or the configuration of "FIG. 9B."

[0514] 9A shows an example of the configuration of device 603, and components that operate in the same manner as those in FIG. 1A1 are assigned the same numbers. A distinctive feature of FIG. 9A is that it includes a component related to the transmission processing unit ♭u of 102A_u in FIG. 1A1. The components included in FIG. 9A have been described in the first embodiment using FIGS. 1A1, 1B, and 1A2, so a detailed description of their operation will be omitted.

[0515] The device 603 having the configuration of FIG. 9A transmits the generated modulated signal ♭u of 103A_u to TRP#1_k of 601_k and TRP#2_i of 602_i.

[0516] Figure 9B shows an example of the configuration of device 603 different from Figure 9A, and components that operate in the same manner as in Figures 1A1 and 1A2 are assigned the same numbers. A distinctive feature of Figure 9A is that it includes components related to transmission processing unit 102a in Figure 1A2. Since the components included in Figure 9B have been explained in embodiment 1 using Figures 1A1, 1B, and 1A2, detailed explanations of their operations will be omitted.

[0517] The device 603 having the configuration of FIG. 9B transmits the generated modulated signal ♭u of 103A_u to TRP#1_k of 601_k and TRP#2_i of 602_i.

[0518] TRP #1_k of 601_k may have, for example, the configuration of "Fig. 10A" or the configuration of "Fig. 10B". As described in the first embodiment, TRP #1_k of 601_k may have antenna ports as the first antenna module and the second antenna module.

[0519] Figure 10A shows an example of the configuration of TRP #1_k of 601_k, and components that operate in the same manner as in Figure 1A1 are assigned the same numbers. A distinctive feature of Figure 10A is that it processes the modulated signal ♭u of 103A_u obtained from device 603. The components of Figure 10A have been described in embodiment 1 using Figures 1A1, 1B, and 1A2, so detailed descriptions of their operation will be omitted.

[0520] Figure 10B shows a different example of the configuration of TRP#1_k of 601_k from Figure 10A, and the same numbers are used for components that operate in the same way as in Figure 1B. A distinctive feature of Figure 10B is that it processes the modulated signal ♭u of 103A_u obtained from device 603. The components of Figure 10B have been explained in embodiment 1 using Figures 1A1, 1B, and 1A2, so detailed explanations of their operation will be omitted.

[0521] When TRP#1_k of 601_k has the configuration of "FIG. 10A" or the configuration of "FIG. 10B", the modulated signal ♭u of 103A_u is transmitted using the first antenna module v of 106A_1_v.

[0522] As described above, TRP #1_k of 601_k may transmit modulated signal ♭u of 103A_u using second antenna module #w of 106A_2_w.

[0523] The detailed operations of these have been explained in the first embodiment, so the explanation will be omitted.

[0524] TRP#2_i of 602_i may have, for example, the configuration of "Fig. 10A" or the configuration of "Fig. 10B". As described in the first embodiment, TRP#2_i of 602_i may have antenna ports as the first antenna module and the second antenna module.

[0525] Figure 10A shows an example of the configuration of TRP #2_i of 602_i, and components that operate in the same manner as in Figure 1A1 are assigned the same numbers. A distinctive feature of Figure 10A is that it processes the modulated signal ♭u of 103A_u obtained from device 603. The components of Figure 10A have been described in embodiment 1 using Figures 1A1, 1B, and 1A2, so a detailed description of their operation will be omitted.

[0526] Figure 10B shows a different example of the configuration of TRP#2_i of 602_i from Figure 10A, and the same numbers are used for components that operate in the same way as in Figure 1B. A distinctive feature of Figure 10B is that it processes the modulated signal ♭u of 103A_u obtained from device 603. The components of Figure 10B have been explained in embodiment 1 using Figures 1A1, 1B, and 1A2, so detailed explanations of their operation will be omitted.

[0527] When TRP#2_i of 602_i has the configuration of "FIG. 10A" or the configuration of "FIG. 10B", the modulated signal ♭u of 103A_u is transmitted using the second antenna module #w of 106A_2_w.

[0528] The detailed operations of these have been explained in the first embodiment, so the explanation will be omitted.

[0529] Note that "modulated signal ♭1 of 103A_1 transmitted by TRP#1_k of 601_k" and "modulated signal ♭1 of 103A_1 transmitted by TRP#2_i of 602_i" are the same signal. Therefore, "modulated signal ♭f of 103A_f transmitted by TRP#1_k of 601_k" and "modulated signal ♭f of 103A_f transmitted by TRP#2_i of 602_i" are the same signal. (f is an integer between 1 and K)

[0530] It is assumed that the "modulated signal ♭u of 103A_u" transmitted by TRP#1_k of 601_k using the first antenna module v of 106A_1_v exists at frequency AA1 and time A1, as shown in Figure 4. (Note that when TRP#1_k of 601_k transmits the "modulated signal ♭u of 103A_u" using the second antenna module 106A_2_w, it is assumed that the "modulated signal ♭u of 103A_u" exists at frequency AA1 and time A1, as shown in Figure 4.)

[0531] Similarly, it is assumed that the "modulated signal ♭u of 103A_u" transmitted by TRP#2_i of 602_i using the second antenna module #w of 106A_2_w also exists at frequency AA1 and time A1.

[0532] Therefore, the transmission signal group v of 112A_1_v transmitted by TRP #1_k of 601_k using the first antenna module v of 106A_1_v, and the transmission signal group #w of 112A_2_w transmitted by TRP #2_i of 602_i using the second antenna module #w of 106A_2_w, exist at frequency AA1 and time A1 (the same (common) frequency, the same (common) time). (Note that when TRP #1_k of 601_k transmits the transmission signal group #w of 112A_2_w using the second antenna module of 106A_2_w, the transmission signal group #w of 112A_2_w exists at frequency AA1 and time A1.)

[0533] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0534] 10A and 10B, TRP #2_i of 602_i performing the above-described operation may transmit modulated signal ♭u of 103A_u via first antenna module v depending on the communication status, radio wave propagation status, destination terminal, etc. In other words, TRP #2_i of 602_i may become TRP #1_k of 601_k depending on the communication status, radio wave propagation status, destination terminal, etc.

[0535] Similarly, TRP #1_k of 601_k, which has the configuration of "Fig. 10A" and the configuration of "Fig. 10B" and is performing the above-mentioned operation, can transmit modulated signal ♭u of 103A_u without using the first antenna module v, depending on the communication situation, radio wave propagation situation, destination terminal, etc. In other words, TRP #1_k of 601_k can also become TRP #2_i of 602_i, depending on the communication situation, radio wave propagation situation, destination terminal, etc.

[0536] Therefore, since it is possible to set an appropriate TRP for each terminal with which communication is being carried out, the effect of improving the data reception quality at the terminal can be obtained, and this can also have the effect of improving the data transmission efficiency of the system.

[0537] Another example of the configuration and operation of TRP#1_k of 601_k and TRP#2_i of 602_i in "Figures 6A3" and "6B3" will be described.

[0538] The device 603 may have, for example, the configuration of "FIG. 9A" or the configuration of "FIG. 9B."

[0539] 9A shows an example of the configuration of device 603, and components that operate in the same manner as those in FIG. 1A1 are assigned the same numbers. A distinctive feature of FIG. 9A is that it includes a component related to the transmission processing unit ♭u of 102A_u in FIG. 1A1. The components included in FIG. 9A have been described in the first embodiment using FIGS. 1A1, 1B, and 1A2, so a detailed description of their operation will be omitted.

[0540] The device 603 having the configuration of FIG. 9A transmits the generated modulated signal ♭u of 103A_u to TRP#1_k of 601_k and TRP#2_i of 602_i.

[0541] Figure 9B shows an example of the configuration of device 603 different from Figure 9A, and components that operate in the same manner as in Figures 1A1 and 1A2 are assigned the same numbers. A distinctive feature of Figure 9A is that it includes components related to transmission processing unit 102a in Figure 1A2. Since the components included in Figure 9B have been explained in embodiment 1 using Figures 1A1, 1B, and 1A2, detailed explanations of their operations will be omitted.

[0542] The device 603 having the configuration of FIG. 9B transmits the generated modulated signal ♭u of 103A_u to TRP#1_k of 601_k and TRP#2_i of 602_i.

[0543] TRP #1_k of 601_k may have, for example, the configuration of "Fig. 10A" or the configuration of "Fig. 10B". As described in the first embodiment, TRP #1_k of 601_k may have antenna ports as the first antenna module and the second antenna module.

[0544] Figure 10A shows an example of the configuration of TRP #1_k of 601_k, and components that operate in the same manner as in Figure 1A1 are assigned the same numbers. A distinctive feature of Figure 10A is that it processes the modulated signal ♭u of 103A_u obtained from device 603. The components of Figure 10A have been described in embodiment 1 using Figures 1A1, 1B, and 1A2, so detailed descriptions of their operation will be omitted.

[0545] Figure 10B shows a different example of the configuration of TRP#1_k of 601_k from Figure 10A, and the same numbers are used for components that operate in the same way as in Figure 1B. A distinctive feature of Figure 10B is that it processes the modulated signal ♭u of 103A_u obtained from device 603. The components of Figure 10B have been explained in embodiment 1 using Figures 1A1, 1B, and 1A2, so detailed explanations of their operation will be omitted.

[0546] When TRP#1_k of 601_k has the configuration of "FIG. 10A" or the configuration of "FIG. 10B", the modulated signal ♭u of 103A_u is transmitted using the first antenna module v of 106A_1_v.

[0547] As described above, TRP #1_k of 601_k may transmit modulated signal ♭u of 103A_u using second antenna module #w of 106A_2_w.

[0548] The detailed operations of these have been explained in the first embodiment, so the explanation will be omitted.

[0549] TRP#2_i of 602_i may have, for example, the configuration of "FIG. 12A" or the configuration of "FIG. 12B."

[0550] Figure 12A shows an example of the configuration of TRP #2_i of 602_i, with the same numbers assigned to components that operate in the same manner as in Figure 1A1. A distinctive feature of Figure 12A is that it processes the modulated signal ♭u of 103A_u obtained from device 603. As described in embodiment 1, TRP #2_i of 602_i may be equipped with an antenna port as a second antenna module. The components of Figure 12A have been described in embodiment 1 using Figures 1A1, 1B, and 1A2, so detailed operational descriptions will be omitted.

[0551] Figure 12B shows an example of the configuration of TRP #2_i of 602_i, with the same numbers assigned to components that operate in the same manner as in Figure 1B. A distinctive feature of Figure 12B is that it processes the modulated signal ♭u of 103A_u obtained from device 603. As described in embodiment 1, TRP #2_i of 602_i may be equipped with an antenna port as a second antenna module. The components of Figure 12B are described in embodiment 1 using Figures 1A1, 1B, and 1A2, so detailed operational descriptions will be omitted.

[0552] When TRP#2_i of 602_i has the configuration of "FIG. 12A" or the configuration of "FIG. 12B", the modulated signal ♭u of 103A_u is transmitted using the second antenna module #w of 106A_2_w.

[0553] The detailed operations of these have been explained in the first embodiment, so the explanation will be omitted.

[0554] Note that "modulated signal ♭1 of 103A_1 transmitted by TRP#1_k of 601_k" and "modulated signal ♭1 of 103A_1 transmitted by TRP#2_i of 602_i" are the same signal. Therefore, "modulated signal ♭f of 103A_f transmitted by TRP#1_k of 601_k" and "modulated signal ♭f of 103A_f transmitted by TRP#2_i of 602_i" are the same signal. (f is an integer between 1 and K)

[0555] It is assumed that the "modulated signal ♭u of 103A_u" transmitted by TRP#1_k of 601_k using the first antenna module v of 106A_1_v exists at frequency AA1 and time A1, as shown in Figure 4. (Note that when TRP#1_k of 601_k transmits the "modulated signal ♭u of 103A_u" using the second antenna module 106A_2_w, it is assumed that the "modulated signal ♭u of 103A_u" exists at frequency AA1 and time A1, as shown in Figure 4.)

[0556] Similarly, it is assumed that the "modulated signal ♭u of 103A_u" transmitted by TRP#2_i of 602_i using the second antenna module #w of 106A_2_w also exists at frequency AA1 and time A1.

[0557] Therefore, the transmission signal group v of 112A_1_v transmitted by TRP #1_k of 601_k using the first antenna module v of 106A_1_v, and the transmission signal group #w of 112A_2_w transmitted by TRP #2_i of 602_i using the second antenna module #w of 106A_2_w, exist at frequency AA1 and time A1 (the same (common) frequency, the same (common) time). (Note that when TRP #1_k of 601_k transmits the transmission signal group #w of 112A_2_w using the second antenna module of 106A_2_w, the transmission signal group #w of 112A_2_w exists at frequency AA1 and time A1.)

[0558] 10A and 10B, TRP #1_k of 601_k performing the above-described operation may transmit modulated signal ♭u of 103A_u without using the first antenna module v, depending on the communication situation, radio wave propagation situation, destination terminal, etc. In other words, TRP #1_k of 601_k may become TRP #2_i of 602_i, depending on the communication situation, radio wave propagation situation, destination terminal, etc.

[0559] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0560] Furthermore, when TRP #1_k of 601_k transmits a transmission signal group #w of 112A_2_w using the second antenna module #w of 106A_2_w, the "modulated signal ♭u of 103A_u" will be present at frequency AA1 and time A1, as shown in Figure 4.

[0561] Therefore, since it is possible to set an appropriate TRP for each terminal with which communication is being carried out, the effect of improving the data reception quality at the terminal can be obtained, and this can also have the effect of improving the data transmission efficiency of the system.

[0562] Another example of the configuration and operation of TRP#1_k of 601_k and TRP#2_i of 602_i in Figures 6A3 and 6B3 will be described.

[0563] The device 603 may have, for example, the configuration of "FIG. 9A" or the configuration of "FIG. 9B."

[0564] 9A shows an example of the configuration of device 603, and components that operate in the same manner as those in FIG. 1A1 are assigned the same numbers. A distinctive feature of FIG. 9A is that it includes a component related to the transmission processing unit ♭u of 102A_u in FIG. 1A1. The components included in FIG. 9A have been described in the first embodiment using FIGS. 1A1, 1B, and 1A2, so a detailed description of their operation will be omitted.

[0565] The device 603 having the configuration of FIG. 9A transmits the generated modulated signal ♭u of 103A_u to TRP#1_k of 601_k and TRP#2_i of 602_i.

[0566] Figure 9B shows an example of the configuration of device 603 different from Figure 9A, and components that operate in the same manner as in Figures 1A1 and 1A2 are assigned the same numbers. A distinctive feature of Figure 9A is that it includes components related to transmission processing unit 102a in Figure 1A2. Since the components included in Figure 9B have been explained in embodiment 1 using Figures 1A1, 1B, and 1A2, detailed explanations of their operations will be omitted.

[0567] The device 603 having the configuration of FIG. 9B transmits the generated modulated signal ♭u of 103A_u to TRP#1_k of 601_k and TRP#2_i of 602_i.

[0568] TRP#1_k of 601_k may have, for example, the configuration of "FIG. 11A" or the configuration of "FIG. 11B."

[0569] FIG. 11A shows an example of the configuration of TRP #1_k of 601_k, with the same numbers used for components that operate in the same manner as in FIG. 1A1. A distinctive feature of FIG. 11A is that it processes the modulated signal ♭u of 103A_u obtained from device 603. As described in the first embodiment, TRP #1_k of 601_k may include an antenna port as the first antenna module. The components included in FIG. 11A are described in the first embodiment using FIGS. 1A1, 1B, and 1A2, and therefore detailed operational descriptions will be omitted.

[0570] 11B shows an example of the configuration of TRP #1_k of 601_k, where components that operate in the same manner as in FIG. 1B are assigned the same numbers. A distinctive feature of FIG. 11B is that it processes the modulated signal ♭u of 103A_u obtained from device 603. As described in the first embodiment, TRP #1_k of 601_k may be equipped with an antenna port as the first antenna module. The components of FIG. 11B are described in the first embodiment using FIGS. 1A1, 1B, and 1A2, so detailed descriptions of their operation will be omitted.

[0571] When TRP#1_k of 601_k has the configuration of "FIG. 11A" or the configuration of "FIG. 11B", the modulated signal ♭u of 103A_u is transmitted using the first antenna module v of 106A_1_v.

[0572] The detailed operations of these have been explained in the first embodiment, so the explanation will be omitted.

[0573] TRP#2_i of 602_i may have, for example, the configuration of "FIG. 10A" or the configuration of "FIG. 10B." As described in the first embodiment, TRP#2_i of 602_i may have antenna ports as the first antenna module and the second antenna module.

[0574] Figure 10A shows an example of the configuration of TRP #2_i of 602_i, and components that operate in the same manner as in Figure 1A1 are assigned the same numbers. A distinctive feature of Figure 10A is that it processes the modulated signal ♭u of 103A_u obtained from device 603. The components of Figure 10A have been described in embodiment 1 using Figures 1A1, 1B, and 1A2, so a detailed description of their operation will be omitted.

[0575] Figure 10B shows a different example of the configuration of TRP#2_i of 602_i from Figure 10A, and the same numbers are used for components that operate in the same way as in Figure 1B. A distinctive feature of Figure 10B is that it processes the modulated signal ♭u of 103A_u obtained from device 603. The components of Figure 10B have been explained in embodiment 1 using Figures 1A1, 1B, and 1A2, so detailed explanations of their operation will be omitted.

[0576] When TRP#2_i of 602_i has the configuration of "FIG. 10A" or the configuration of "FIG. 10B", the modulated signal ♭u of 103A_u is transmitted using the second antenna module #w of 106A_2_w.

[0577] The detailed operations of these have been explained in the first embodiment, so the explanation will be omitted.

[0578] Note that "modulated signal ♭1 of 103A_1 transmitted by TRP#1_k of 601_k" and "modulated signal ♭1 of 103A_1 transmitted by TRP#2_i of 602_i" are the same signal. Therefore, "modulated signal ♭f of 103A_f transmitted by TRP#1_k of 601_k" and "modulated signal ♭f of 103A_f transmitted by TRP#2_i of 602_i" are the same signal. (f is an integer between 1 and K)

[0579] It is assumed that the "modulated signal ♭u of 103A_u" transmitted by TRP#1_k of 601_k using the first antenna module v of 106A_1_v exists at frequency AA1 and time A1, as shown in Figure 4. (Note that when TRP#1_k of 601_k transmits the "modulated signal ♭u of 103A_u" using the second antenna module 106A_2_w, it is assumed that the "modulated signal ♭u of 103A_u" exists at frequency AA1 and time A1, as shown in Figure 4.)

[0580] Similarly, it is assumed that the "modulated signal ♭u of 103A_u" transmitted by TRP#2_i of 602_i using the second antenna module #w of 106A_2_w also exists at frequency AA1 and time A1.

[0581] Therefore, the transmission signal group v of 112A_1_v transmitted by TRP #1_k of 601_k using the first antenna module v of 106A_1_v, and the transmission signal group #w of 112A_2_w transmitted by TRP #2_i of 602_i using the second antenna module #w of 106A_2_w, exist at frequency AA1 and time A1 (the same (common) frequency, the same (common) time). (Note that when TRP #1_k of 601_k transmits the transmission signal group #w of 112A_2_w using the second antenna module of 106A_2_w, the transmission signal group #w of 112A_2_w exists at frequency AA1 and time A1.)

[0582] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0583] 10A and 10B, TRP #2_i of 602_i performing the above-described operation may transmit modulated signal ♭u of 103A_u via first antenna module v depending on the communication status, radio wave propagation status, destination terminal, etc. In other words, TRP #2_i of 602_i may become TRP #1_k of 601_k depending on the communication status, radio wave propagation status, destination terminal, etc.

[0584] Therefore, since it is possible to set an appropriate TRP for each terminal with which communication is being carried out, the effect of improving the data reception quality at the terminal can be obtained, and this can also have the effect of improving the data transmission efficiency of the system.

[0585] Another example of the configuration and operation of TRP#1_k of 601_k and TRP#2_i of 602_i in "Figures 6A3" and "6B3" will be described.

[0586] The device 603 may have, for example, the configuration of "FIG. 9A" or the configuration of "FIG. 9B."

[0587] 9A shows an example of the configuration of device 603, and components that operate in the same manner as those in FIG. 1A1 are assigned the same numbers. A distinctive feature of FIG. 9A is that it includes a component related to the transmission processing unit ♭u of 102A_u in FIG. 1A1. The components included in FIG. 9A have been described in the first embodiment using FIGS. 1A1, 1B, and 1A2, so a detailed description of their operation will be omitted.

[0588] The device 603 having the configuration of FIG. 9A transmits the generated modulated signal ♭u of 103A_u to TRP#1_k of 601_k and TRP#2_i of 602_i.

[0589] Figure 9B shows an example of the configuration of device 603 different from Figure 9A, and components that operate in the same manner as in Figures 1A1 and 1A2 are assigned the same numbers. A distinctive feature of Figure 9A is that it includes components related to transmission processing unit 102a in Figure 1A2. Since the components included in Figure 9B have been explained in embodiment 1 using Figures 1A1, 1B, and 1A2, detailed explanations of their operations will be omitted.

[0590] The device 603 having the configuration of FIG. 9B transmits the generated modulated signal ♭u of 103A_u to TRP#1_k of 601_k and TRP#2_i of 602_i.

[0591] TRP#1_k of 601_k may have, for example, the configuration of "FIG. 11A" or the configuration of "FIG. 11B."

[0592] FIG. 11A shows an example of the configuration of TRP #1_k of 601_k, with the same numbers used for components that operate in the same manner as in FIG. 1A1. A distinctive feature of FIG. 11A is that it processes the modulated signal ♭u of 103A_u obtained from device 603. As described in the first embodiment, TRP #1_k of 601_k may include an antenna port as the first antenna module. The components included in FIG. 11A are described in the first embodiment using FIGS. 1A1, 1B, and 1A2, and therefore detailed operational descriptions will be omitted.

[0593] 11B shows an example of the configuration of TRP #1_k of 601_k, where components that operate in the same manner as in FIG. 1B are assigned the same numbers. A distinctive feature of FIG. 11B is that it processes the modulated signal ♭u of 103A_u obtained from device 603. As described in the first embodiment, TRP #1_k of 601_k may be equipped with an antenna port as the first antenna module. The components of FIG. 11B are described in the first embodiment using FIGS. 1A1, 1B, and 1A2, so detailed descriptions of their operation will be omitted.

[0594] When TRP#1_k of 601_k has the configuration of "FIG. 11A" or the configuration of "FIG. 11B", the modulated signal ♭u of 103A_u is transmitted using the first antenna module v of 106A_1_v.

[0595] The detailed operations of these have been explained in the first embodiment, so the explanation will be omitted.

[0596] TRP#2_i of 602_i may have, for example, the configuration of "FIG. 12A" or the configuration of "FIG. 12B."

[0597] Figure 12A shows an example of the configuration of TRP #2_i of 602_i, with the same numbers assigned to components that operate in the same manner as in Figure 1A1. A distinctive feature of Figure 12A is that it processes the modulated signal ♭u of 103A_u obtained from device 603. As described in embodiment 1, TRP #2_i of 602_i may be equipped with an antenna port as a second antenna module. The components of Figure 12A have been described in embodiment 1 using Figures 1A1, 1B, and 1A2, so detailed operational descriptions will be omitted.

[0598] Figure 12B shows an example of the configuration of TRP #2_i of 602_i, with the same numbers assigned to components that operate in the same manner as in Figure 1B. A distinctive feature of Figure 12B is that it processes the modulated signal ♭u of 103A_u obtained from device 603. As described in embodiment 1, TRP #2_i of 602_i may be equipped with an antenna port as a second antenna module. The components of Figure 12B are described in embodiment 1 using Figures 1A1, 1B, and 1A2, so detailed operational descriptions will be omitted.

[0599] When TRP#2_i of 602_i has the configuration of "FIG. 12A" or the configuration of "FIG. 12B", the modulated signal ♭u of 103A_u is transmitted using the second antenna module #w of 106A_2_w.

[0600] The detailed operations of these have been explained in the first embodiment, so the explanation will be omitted.

[0601] Note that "modulated signal ♭1 of 103A_1 transmitted by TRP#1_k of 601_k" and "modulated signal ♭1 of 103A_1 transmitted by TRP#2_i of 602_i" are the same signal. Therefore, "modulated signal ♭f of 103A_f transmitted by TRP#1_k of 601_k" and "modulated signal ♭f of 103A_f transmitted by TRP#2_i of 602_i" are the same signal. (f is an integer between 1 and K)

[0602] It is assumed that the "modulated signal ♭u of 103A_u" transmitted by TRP#1_k of 601_k using the first antenna module v of 106A_1_v exists at frequency AA1 and time A1, as shown in Figure 4. (Note that when TRP#1_k of 601_k transmits the "modulated signal ♭u of 103A_u" using the second antenna module 106A_2_w, it is assumed that the "modulated signal ♭u of 103A_u" exists at frequency AA1 and time A1, as shown in Figure 4.)

[0603] Similarly, it is assumed that the "modulated signal ♭u of 103A_u" transmitted by TRP#2_i of 602_i using the second antenna module #w of 106A_2_w also exists at frequency AA1 and time A1.

[0604] Therefore, the transmission signal group v of 112A_1_v transmitted by TRP #1_k of 601_k using the first antenna module v of 106A_1_v, and the transmission signal group #w of 112A_2_w transmitted by TRP #2_i of 602_i using the second antenna module #w of 106A_2_w, exist at frequency AA1 and time A1 (the same (common) frequency, the same (common) time). (Note that when TRP #1_k of 601_k transmits the transmission signal group #w of 112A_2_w using the second antenna module of 106A_2_w, the transmission signal group #w of 112A_2_w exists at frequency AA1 and time A1.)

[0605] By doing so, it is possible to obtain the effect of improving the reception quality of data at the terminal with which the base station is communicating, and it is also possible to obtain the effect of improving the data transmission efficiency of the system.

[0606] 6A1 and 6A2, TRP #1_1 of 601_1 may have a control function to control other TRPs. Also, in Fig. 6B1 and 6B2, one or more TRP #1_k of 601_k may have a control function to control other TRPs.

[0607] In Figures 6A3 and 6B3, the examples have been given of "Figures 9A and 9B" as what device 603 has, "Figures 10A, 10B, 11A, and 11B" as what TRP#1_k of 601_k has, and "Figures 10A, 10B, 12A, and 12B" as what TRP#2_i of 602_i has, but the allocation of "what device 603 has, what TRP#1_k of 601_k has, and what TRP#2_i of 602_i has" is not limited to this, and for example, device 603 may have processing units other than the transmission processing unit, and TRP#1_k of 601_k and TRP#2_i of 602_i may have "processing units other than the processing units that device 603 has."

[0608] "TRP#1_1 of 601_1," "TRP#2_1 of 602_1, TRP#2_2 of 602_2, ..., TRP#2_Y of 602_Y" in Figures 6A1, 6A2, and 6A3 may be composed of a single device (e.g., a base station, a gNB, etc.) or multiple devices.

[0609] "TRP#1_1 of 601_1," "TRP#2_1 of 602_1, TRP#2_2 of 602_2, ..., TRP#2_Y of 602_Y" in Figures 6A1, 6A2, and 6A3 may be included in one device (e.g., a base station, a gNB, etc.) or multiple devices.

[0610] In Figures 6B1, 6B2, and 6B3, "TRP#1_1 of 601_1, TRP#1_2 of 601_2, ..., TRP#1_X of 601_X" and "TRP#2_1 of 602_1, TRP#2_2 of 602_2, ..., TRP#2_Y of 602_Y" may be composed of a single device (e.g., a base station, a gNB, etc.) or multiple devices.

[0611] "TRP#1_1 of 601_1, TRP#1_2 of 601_2, ..., TRP#1_X of 601_X" and "TRP#2_1 of 602_1, TRP#2_2 of 602_2, ..., TRP#2_Y of 602_Y" in Figures 6B1, 6B2, and 6B3 may be included in one device (e.g., a base station, a gNB, etc.) or multiple devices.

[0612] Another example of a modification in which the base station described in the first embodiment is applied to a TRP will be described below. Figures 13A1, 13A2, and 13A3 show examples of the states of a TRP and a terminal.

[0613] "TRP_1#1_1 of 1311_1," "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1" in Figures 13A1, 13A2, and 13A3 are called the first TRP set. The first TRP set plays the role of "TRP#1_1 of 601_1," "TRP#2_1 of 602_1, ..., TRP#2_Y of 602_Y" in Figures 6A1, 6A2, and 6A3. Note that Y1 is an integer equal to or greater than 1, or an integer equal to or greater than 2. Therefore, the first "modulation signal" set (modulation signal ♭u of 103A_u) will be transmitted by the first TRP set of "TRP_1#1_1 of 1311_1", "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1". The frequency and time existence method of the first "modulation signal" set has been explained above using Figure 4, so explanation will be omitted.

[0614] TRP_1#1_1 of 1311_1 corresponds to TRP#1_1 of 601_1 in "FIGS. 6A1, 6A2, and 6A3." As described in the first embodiment, TRP_1#1_1 of 1311_1 may include a first antenna module and / or a second antenna module, or may include an antenna port as the first antenna module and / or the second antenna module.

[0615] TRP_1#2_i of 1312_i corresponds to TRP#2_i of 602_i in "FIGS. 6A1, 6A2, and 6A3." (i is an integer of 1 or more.) As described in the first embodiment, TRP_1#2_i of 1312_i may be equipped with a first antenna module and / or a second antenna module, or may be equipped with an antenna port as the first antenna module and / or the second antenna module.

[0616] TRP_1#1_1 of 1311_1 transmits the transmission signal group using the first antenna module. Also, TRP_1#1_1 of 1311_1 may transmit the transmission signal group using the second antenna module. Note that the detailed operation of TRP_1#1_1 of 1311_1 has already been explained as the operation of TRP#1_1 of 601_1 in "Figures 6A1, 6A2, and 6A3," so explanation will be omitted.

[0617] TRP_1#2_i of 1312_i transmits a group of transmission signals using the second antenna module, where i is an integer equal to or greater than 1. Note that the detailed operation of TRP_1#2_i of 1312_i has already been described as the operation of TRP#2_i of 602_i in "FIGS. 6A1, 6A2, and 6A3," and therefore will not be described here.

[0618] "TRP_2#1_1 of 1321_1," "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2" in Figures 13A1, 13A2, and 13A3 are called the second TRP set. The second TRP set plays the role of "TRP#1_1 of 601_1," "TRP#2_1 of 602_1, ..., TRP#2_Y of 602_Y" in Figures 6A1, 6A2, and 6A3. Note that Y2 is an integer equal to or greater than 1, or an integer equal to or greater than 2. Therefore, the second "modulation signal" set (modulation signal ♭u of 103A_u) will be transmitted by the second TRP set of "TRP_2#1_1 of 1321_1", "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2". The frequency and time existence method of the second "modulation signal" set has been explained above using Figure 4, so explanation will be omitted.

[0619] TRP_2#1_1 of 1321_1 corresponds to TRP#1_1 of 601_1 in "FIGS. 6A1, 6A2, and 6A3." As described in the first embodiment, TRP_2#1_1 of 1321_1 may include a first antenna module and / or a second antenna module, or may include an antenna port as the first antenna module and / or the second antenna module.

[0620] TRP_2#2_i of 1322_i corresponds to TRP#2_i of 602_i in "FIGS. 6A1, 6A2, and 6A3." (i is an integer equal to or greater than 1.) Note that, as described in the first embodiment, TRP_2#2_i of 1322_i may include a first antenna module and / or a second antenna module, or may include an antenna port as the first antenna module and / or the second antenna module.

[0621] TRP_2#1_1 of 1321_1 transmits the transmission signal group using the first antenna module. Also, TRP_2#1_1 of 1321_1 may transmit the transmission signal group using the second antenna module. Note that the detailed operation of TRP_2#1_1 of 1321_1 has already been explained as the operation of TRP#1_1 of 601_1 in "Figures 6A1, 6A2, and 6A3," so explanation will be omitted.

[0622] TRP_2#2_i of 1322_i transmits a group of transmission signals using the second antenna module, where i is an integer equal to or greater than 1. Note that the detailed operation of TRP_2#2_i of 1322_i has already been described as the operation of TRP#2_i of 602_i in "FIGS. 6A1, 6A2, and 6A3," and therefore will not be described here.

[0623] 13A1, 13A2, and 13A3 are examples in which a TRP set transmits a transmission signal to a terminal, and can be said to be examples of downlink multiple TRPs.

[0624] The first TRP set of "TRP_1#1_1 of 1311_1", "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1" may be communicable wirelessly as shown in FIG. 13A1.

[0625] The second TRP set of "TRP_2#1_1 of 1321_1", "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2" may be communicable wirelessly as shown in FIG. 13A1.

[0626] The first TRP set of "TRP_1#1_1 of 1311_1", "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1" may be communicable via wired connection as shown in FIG. 13A2.

[0627] The second TRP set of "TRP_2#1_1 of 1321_1", "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2" may be communicable via wired connection as shown in FIG. 13A2.

[0628] The first TRP set of "TRP_1#1_1 of 1311_1", "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1" may be communicable via device 1303 as shown in FIG. 13A3.

[0629] The second TRP set of "TRP_2#1_1 of 1321_1", "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2" may be communicable via device 1303 as shown in FIG. 13A3.

[0630] The device 1303 may have, for example, the configuration of FIG. 13B.

[0631] As shown in FIG. 13B, the device 1303 includes a transmission processing unit 1380_1 for the first TRP set and a transmission processing unit 1380_2 for the second TRP.

[0632] The first TRP set transmission processing unit 1380_1 has the configuration shown in Figures 9A and 9B. Therefore, the first TRP set transmission processing unit 1380_1 receives the first TRP set transmission data 1381_1 (e.g., transmission data 101A_u, transmission data 101a) and the control signal 1383 as input, and outputs the first TRP set modulation signal(s) (e.g., modulation signal ♭u of 103A_u) 1382_1.

[0633] The second TRP set transmission processing unit 1380_2 has the configuration shown in Figures 9A and 9B. Therefore, the second TRP set transmission processing unit 1380_2 receives the second TRP set transmission data 1381_2 (e.g., transmission data 101A_u, transmission data 101a) and the control signal 1383 as input, and outputs the second TRP set modulation signal(s) (e.g., modulation signal ♭u of 103A_u) 1382_2.

[0634] The control signal 1383 is a signal for controlling the relationship between the "frequency and time when the modulated signal for the first TRP set 1382_1 exists" and the "frequency and time when the modulated signal for the second TRP set 1382_2 exists."

[0635] In the case of Figures 13A1 and 13A2, the modulation signal (group) for the first TRP set (e.g., modulation signal ♭u of 103A_u) 1382_1 is generated by "TRP_1#1_1 of 1311_1," "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1," and the modulation signal (group) for the second TRP set (e.g., modulation signal ♭u of 103A_u) 1382_2 is generated by "TRP_2#1_1 of 1321_1," "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2."

[0636] 13B may be included in one or more TRPs in the first TRP set and / or one or more TRPs in the second TRP set in Figures 13A1, 13A2, and 13A3. The TRPs having the configuration of Figure 13B will transmit "modulation signal(s) for the first TRP set (e.g., modulation signal ♭u of 103A_u) 1382_1 and modulation signal(s) for the second TRP set (e.g., modulation signal ♭u of 103A_u) 1382_2" to "the TRPs constituting the first TRP set and the TRPs constituting the second TRP set."

[0637] The first "modulated signal" set (modulated signal ♭u of 103A_u) transmitted by the first TRP set of "TRP_1#1_1 of 1311_1", "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1" is called the "modulated signal (group) for the first TRP set."

[0638] The second "modulated signal" set (modulated signal ♭u of 103A_u) transmitted by the second TRP set of "TRP_2#1_1 of 1321_1", "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2" is called the "modulated signal (group) for the second TRP set."

[0639] In this case, when transmitting the "modulated signal (group) for the first TRP set" and the "modulated signal (group) for the second TRP set" using the SDM (Spatial Division Multiplexing) method (e.g., fully overlapping, partially overlapping, etc.), examples of arrangement on the time-frequency axis are shown in Figures 13C1, 13C2, 13C3, and 13C4. In Figures 13C1, 13C2, 13C3, and 13C4, the horizontal axis represents time and the vertical axis represents frequency.

[0640] SDM Example 1-1: Assume that the "modulation signal (group) 1382_1 for the first TRP set" exists at frequency CC1 and time C1, as shown in Figure 13C1. (Assume that the transmission signal (group) transmitted by the TRPs constituting the first TRP set exists at frequency CC1 and time C1.) At this time, assume that the "modulation signal (group) 1382_2 for the second TRP set" exists at frequency CC1 and time C1, as shown in Figure 13C1. (Assume that the transmission signal (group) transmitted by the TRPs constituting the second TRP set exists at frequency CC1 and time C1.)

[0641] SDM Example 1-2: Assume that the "modulation signal(s) 1382_1 for the first TRP set" exists at frequency CC1 and time C1, as shown in Figure 13C1. (Assume that the transmission signal(s) transmitted by the TRPs constituting the first TRP set exist at frequency CC1 and time C1.) At this time, assume that the "modulation signal(s) 1382_2 for the second TRP set" exists at part of frequency CC1 and time C1, as shown in Figure 13C2. (Assume that the transmission signal(s) transmitted by the TRPs constituting the second TRP set exist at part of frequency CC1 and time C1.)

[0642] SDM Example 1-3: Assume that the "modulation signal(s) 1382_1 for the first TRP set" exists at frequency CC1 and time C1, as shown in Figure 13C1. (Assume that the transmission signal(s) transmitted by the TRPs constituting the first TRP set exist at frequency CC1 and time C1.) At this time, assume that the "modulation signal(s) 1382_2 for the second TRP set" exists at frequency CC1 and part of time C1, as shown in Figure 13C3. (Assume that the transmission signal(s) transmitted by the TRPs constituting the second TRP set exist at frequency CC1 and part of time C1.)

[0643] SDM Example 1-4: Assume that the "modulation signal(s) 1382_1 for the first TRP set" exists at frequency CC1 and time C1, as shown in Figure 13C1. (Assume that the transmission signal(s) transmitted by the TRPs constituting the first TRP set exist at frequency CC1 and time C1.) At this time, assume that the "modulation signal(s) 1382_2 for the second TRP set" exists at part of frequency CC1 and part of time C1, as shown in Figure 13C4. (Assume that the transmission signal(s) transmitted by the TRPs constituting the second TRP set exist at part of frequency CC1 and part of time C1.)

[0644] SDM Example 1-5: Assume that the "modulation signal(s) 1382_1 for the first TRP set" exists at frequency CC1 and time C1, as shown in Figure 13C1. (Assume that the transmission signal(s) transmitted by the TRPs constituting the first TRP set exist at frequency CC1 and time C1.) In this case, the frequency and time used by the "modulation signal(s) 1382_2 for the second TRP set" overlap with part of frequency CC1 and / or part of time C1. (Assume that the frequency and time used by the transmission signal(s) transmitted by the TRPs constituting the second TRP set overlap with part of frequency CC1 and / or part of time C1.)

[0645] In addition, the "modulated signal (group) for the first TRP set" and the "modulated signal (group) for the second TRP set" may be transmitted using a TDM (Time Division Multiplexing) method (e.g., tdmScheme, non-overlapping, etc.). Examples of the arrangement on the time-frequency axis in this case are shown in Figures 13D1 and 13D2. In Figures 13D1 and 13D2, the horizontal axis represents time and the vertical axis represents frequency.

[0646] TDM Example 1-1: Assume that the "modulation signal (group) 1382_1 for the first TRP set" exists at frequency DD1 and time D1, as shown in Figure 13D1. (Assume that the transmission signal (group) transmitted by the TRPs constituting the first TRP set exists at frequency DD1 and time D1.) At this time, assume that the "modulation signal (group) 1382_2 for the second TRP set" exists at frequency DD1 and time D2, as shown in Figure 13D1. (Assume that the transmission signal (group) transmitted by the TRPs constituting the second TRP set exists at frequency DD1 and time D2.)

[0647] TDM Example 1-2: Assume that the "modulation signal(s) 1382_1 for the first TRP set" exists at frequency DD1 and time D1, as shown in Figure 13D2. (Assume that the transmission signal(s) transmitted by the TRPs constituting the first TRP set exist at frequency DD1 and time D1.) At this time, assume that the "modulation signal(s) 1382_2 for the second TRP set" exists at part of frequency DD1, time D2, as shown in Figure 13D2. (Assume that the transmission signal(s) transmitted by the TRPs constituting the second TRP set exist at frequency DD1 and time D2.)

[0648] The "modulated signal (group) for the first TRP set" and the "modulated signal (group) for the second TRP set" may be transmitted using an FDM (Frequency Division Multiplexing) method (e.g., fdmScheme, non-overlapping, etc.). Examples of the arrangement on the time-frequency axis in this case are shown in Figures 13E1, 13E2, and 13E3. In Figures 13E1, 13E2, and 13E3, the horizontal axis represents time and the vertical axis represents frequency.

[0649] FDM Example 1-1: Assume that the "modulation signal(s) 1382_1 for the first TRP set" exists at frequency EE1 and time E1, as shown in Figure 13E1. (Assume that the transmission signal(s) transmitted by the TRPs constituting the first TRP set exist at frequency EE1 and time E1.) At this time, assume that the "modulation signal(s) 1382_2 for the second TRP set" exists at frequency EE2 and time E1, as shown in Figure 13E1. (Assume that the transmission signal(s) transmitted by the TRPs constituting the second TRP set exist at frequency EE2 and time E1.)

[0650] FDM Example 1-2: Assume that the "modulation signal(s) 1382_1 for the first TRP set" exists at frequency EE1 and time E1, as shown in Figure 13E2. (Assume that the transmission signal(s) transmitted by the TRPs constituting the first TRP set exist at frequency EE1 and time E1.) At this time, assume that the "modulation signal(s) 1382_2 for the second TRP set" exists at frequency EE2 and part of time E1, as shown in Figure 13E2. (Assume that the transmission signal(s) transmitted by the TRPs constituting the second TRP set exist at frequency EE2 and part of time E1.)

[0651] FDM Example 1-3: Assume that the "modulation signal(s) 1382_1 for the first TRP set" exists at frequency EE1 and time E1, as shown in Figure 13E3. (Assume that the transmission signal(s) transmitted by the TRPs constituting the first TRP set exist at frequency EE1 and time E1.) At this time, assume that the "modulation signal(s) 1382_2 for the second TRP set" exists at frequency EE2 and time E2, as shown in Figure 13E3. (Assume that the transmission signal(s) transmitted by the TRPs constituting the second TRP set exist at frequency EE2 and time E2.)

[0652] FDM Example 1-4: Assume that the "modulation signal(s) 1382_1 for the first TRP set" exists at frequency EE1 and time E1. (Assume that the transmission signal(s) transmitted by the TRPs constituting the first TRP set exist at frequency EE1 and time E1.) At this time, assume that the "modulation signal(s) 1382_2 for the second TRP set" exists at frequency EE2 and time E2. (Assume that the transmission signal(s) transmitted by the TRPs constituting the second TRP set exist at frequency EE2 and time E2.) Furthermore, time E1 and time E2 partially overlap.

[0653] By doing so, the effect of improving the data reception quality at the terminal that is the communication partner of the base station can be obtained, and the effect of improving the data transmission efficiency of the system can be obtained. In addition, since the TRP set transmits multiple sets of modulated signals, and the terminal can receive multiple sets of modulated signals, the effect of improving the data transmission efficiency and improving the data reception quality can be obtained.

[0654] In the above description, the first "modulation signal" set, "modulation signal(s) for the first TRP set," and the second "modulation signal" set, "modulation signal(s) for the second TRP set," may contain the same data. Therefore, repetition may be applied to the first "modulation signal" set, "modulation signal(s) for the first TRP set," and the second "modulation signal" set, "modulation signal(s) for the second TRP set."

[0655] Furthermore, when the SDM method, TDM method, or FDM method is applied, the arrangement on the time-frequency axis of the first ``modulated signal'' set, ``modulated signal (group) for first TRP set,'' and the second ``modulated signal'' set, ``modulated signal (group) for second TRP set,'' is not limited to the examples of Figures 13C1, 13C2, 13C3, 13C4, 13D1, 13D2, 13E1, 13E2, and 13E3.

[0656] The "transmission signal set including the first "modulation signal" set, "modulation signal(s) for the first TRP set"" and the "transmission signal set including the second "modulation signal" set, "modulation signal(s) for the second TRP set"" may be in a (full) coherent relationship, a partial coherent relationship, or a non-coherent relationship.

[0657] Another example will be explained. In Figures 13F1, 13F2, and 13F3, "TRP_1#1_1 of 1311_1, ..., TRP_1#1_X1 of 1311_X1" and "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1" are called the third TRP set. The third TRP set fulfills the role of "TRP#1_1 of 601_1, ..., TRP#1_X of 601_X" and "TRP#2_1 of 602_1, ..., TRP#2_Y of 602_Y" in Figures 6B1, 6B2, and 6B3. Note that X1 is "an integer equal to or greater than 1, or an integer equal to or greater than 2," and Y1 is "an integer equal to or greater than 1, or an integer equal to or greater than 2." Therefore, the third "modulation signal" set (modulation signal ♭u of 103A_u) will be transmitted by the third TRP set of "TRP_1#1_1 of 1311_1, ..., TRP_1#1_X1 of 1311_X1", "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1". The frequency and time existence method of the third "modulation signal" set has been explained above using Figure 4, so explanation will be omitted.

[0658] TRP_1#1_k of 1311_k corresponds to TRP#1_k of 601_k in "FIGS. 6B1, 6B2, and 6B3." (k is an integer equal to or greater than 1.) As described in the first embodiment, TRP_1#1_k of 1311_k may include a first antenna module and / or a second antenna module, or may include an antenna port as the first antenna module and / or the second antenna module.

[0659] TRP_1#2_i of 1312_i corresponds to TRP#2_i of 602_i in "FIGS. 6B1, 6B2, and 6B3." (i is an integer of 1 or more) Note that, as described in the first embodiment, TRP_1#2_i of 1312_i may be equipped with a first antenna module and / or a second antenna module, or may be equipped with an antenna port as the first antenna module and / or the second antenna module.

[0660] TRP_1#1_k of 1311_k transmits the transmission signal group using the first antenna module. TRP_1#1_k of 1311_k may also transmit the transmission signal group using the second antenna module. Detailed operation of TRP_1#1_k of 1311_k has already been described as the operation of TRP#1_k of 601_k in Figures 6B1, 6B2, and 6B3, so further description will be omitted.

[0661] TRP_1#2_i of 1312_i transmits a group of transmission signals using the second antenna module, where i is an integer equal to or greater than 1. Note that the detailed operation of TRP_1#2_i of 1312_i has already been described as the operation of TRP#2_i of 602_i in "Figures 6B1, 6B2, and 6B3," so a description thereof will be omitted.

[0662] The "TRP_2#1_1 of 1321_1, ..., TRP_2#1_X2 of 1321_X2" and "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2" in Figures 13F1, 13F2, and 13F3 are called the fourth TRP set. The fourth TRP set fulfills the role of "TRP#1_1 of 601_1, ..., TRP#1_X of 601_X" and "TRP#2_1 of 602_1, ..., TRP#2_Y of 602_Y" in Figures 6B1, 6B2, and 6B3. Note that X2 is an integer equal to or greater than 1, or an integer equal to or greater than 2, and Y2 is an integer equal to or greater than 1, or an integer equal to or greater than 2. Therefore, the fourth "modulation signal" set (modulation signal ♭u of 103A_u) will be transmitted by the fourth TRP set of "TRP_2#1_1 of 1321_1, ..., TRP_2#1_X2 of 1321_X2" and "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2". The frequency and time existence method of the fourth "modulation signal" set has been explained above using Figure 4, so explanation will be omitted.

[0663] TRP_2#1_k of 1321_k corresponds to TRP#1_k of 601_k in "FIGS. 6B1, 6B2, and 6B3" (k is an integer equal to or greater than 1). Note that, as described in the first embodiment, TRP_2#1_k of 1321_k may include a first antenna module and / or a second antenna module, or may include an antenna port as the first antenna module and / or the second antenna module.

[0664] TRP_2#2_i of 1322_i corresponds to TRP#2_i of 602_i in "FIGS. 6B1, 6B2, and 6B3." (i is an integer equal to or greater than 1.) Note that, as described in the first embodiment, TRP_2#2_i of 1322_i may include a first antenna module and / or a second antenna module, or may include an antenna port as the first antenna module and / or the second antenna module.

[0665] TRP_2#1_k of 1321_k transmits the transmission signal group using the first antenna module. TRP_2#1_k of 1321_k may also transmit the transmission signal group using the second antenna module. Detailed operation of TRP_2#1_k of 1321_k has already been described as the operation of TRP#1_k of 601_k in Figures 6B1, 6B2, and 6B3, so further description is omitted.

[0666] TRP_2#2_i of 1322_i transmits a group of transmission signals using the second antenna module, where i is an integer equal to or greater than 1. Note that the detailed operation of TRP_2#2_i of 1322_i has already been described as the operation of TRP#2_i of 602_i in "Figures 6B1, 6B2, and 6B3," so a description thereof will be omitted.

[0667] Figures 13F1, 13F2, and 13F3 are examples in which a TRP set transmits a transmission signal to a terminal, and can be said to be examples of downlink multiple TRPs.

[0668] The third TRP set of "TRP_1#1_1 of 1311_1, ..., TRP_1#1_X1 of 1311_X1" and "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1" may be communicable wirelessly as shown in Figure 13F1.

[0669] The fourth TRP set of "TRP_2#1_1 of 1321_1, ..., TRP_2#1_X2 of 1321_X2" and "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2" may be communicable wirelessly as shown in Figure 13F1.

[0670] The third TRP set of "TRP_1#1_1 of 1311_1, ..., TRP_1#1_X1 of 1311_X1" and "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1" may be communicable via wired connection as shown in Figure 13F2.

[0671] The fourth TRP set of "TRP_2#1_1 of 1321_1, ..., TRP_2#1_X2 of 1321_X2" and "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2" may be communicable via wired connection as shown in Figure 13F2.

[0672] The third TRP set of "TRP_1#1_1 of 1311_1, ..., TRP_1#1_X1 of 1311_X1", "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1" may be communicable via device 1303, as shown in FIG. 13F3.

[0673] The fourth TRP set of "TRP_2#1_1 of 1321_1, ..., TRP_2#1_X2 of 1321_X2" and "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2" may be communicable via device 1303, as shown in FIG. 13F3.

[0674] The device 1303 may have, for example, the configuration of FIG. 13B.

[0675] As shown in FIG. 13B, the device 1303 includes a transmission processing unit 1380_1 for the third TRP set and a transmission processing unit 1380_2 for the fourth TRP.

[0676] The third TRP set transmission processing unit 1380_1 has the configuration shown in Figures 9A and 9B. Therefore, the third TRP set transmission processing unit 1380_1 receives the third TRP set transmission data 1381_1 (e.g., transmission data 101A_u, transmission data 101a) and the control signal 1383 as input, and outputs the third TRP set modulation signal (group) (e.g., modulation signal ♭u of 103A_u) 1382_1.

[0677] The fourth TRP set transmission processing unit 1380_2 has the configuration shown in Figures 9A and 9B. Therefore, the fourth TRP set transmission processing unit 1380_2 receives the fourth TRP set transmission data 1381_2 (e.g., transmission data 101A_u, transmission data 101a) and the control signal 1383 as input, and outputs the fourth TRP set modulation signal(s) (e.g., modulation signal ♭u of 103A_u) 1382_2.

[0678] The control signal 1383 is a signal for controlling the relationship between the "frequency and time at which the modulation signal 1382_1 for the third TRP set exists" and the "frequency and time at which the modulation signal 1382_2 for the fourth TRP set exists."

[0679] In the case of Figures 13F1 and 13F2, the modulation signal (group) for the third TRP set (for example, the modulation signal ♭u of 103A_u) 1382_1 is determined by "TRP_1#1_1 of 1311_1, ..., TRP_1#1_X1 of 1311_X1", "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1" The modulation signal (group) for the fourth TRP set (for example, modulation signal ♭u of 103A_u) 1382_2 is generated by "TRP_2#1_1 of 1321_1, ..., TRP_2#1_X2 of 1321_X2", "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2".

[0680] In addition, the part corresponding to the configuration of Figure 13B may be included in one or more TRPs in the third TRP set of Figures 13F1, 13F2, and 13F3, and / or one or more TRPs in the fourth TRP set.The TRPs having the part corresponding to the configuration of Figure 13B will transmit "modulation signal(s) for the third TRP set (e.g., modulation signal ♭u of 103A_u) 1382_1 and modulation signal(s) for the fourth TRP set (e.g., modulation signal ♭u of 103A_u) 1382_2" to "TRPs constituting the first TRP set and TRPs constituting the second TRP set."

[0681] The third "modulated signal" set (modulated signal ♭u of 103A_u) transmitted by the third TRP set of "TRP_1#1_1 of 1311_1, ..., TRP_1#1_X1 of 1311_X1" and "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1" is called the "modulated signal (group) for the third TRP set."

[0682] The fourth "modulated signal" set (modulated signal ♭u of 103A_u) transmitted by the fourth TRP set of "TRP_2#1_1 of 1321_1, ..., TRP_2#1_X2 of 1321_X2" and "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2" is called the "modulated signal (group) for the fourth TRP set."

[0683] In this case, when transmitting the "modulated signal (group) for the third TRP set" and the "modulated signal (group) for the fourth TRP set" using the SDM (Spatial Division Multiplexing) method (e.g., fully overlapping, partially overlapping, etc.), examples of arrangement on the time-frequency axis are shown in Figures 13G1, 13G2, 13G3, and 13G4. In Figures 13G1, 13G2, 13G3, and 13G4, the horizontal axis is time and the vertical axis is frequency.

[0684] SDM Example 2-1: Assume that the "modulation signal (group) 1382_1 for the third TRP set" exists at frequency GG1 and time G1, as shown in Figure 13G1. (Assume that the transmission signal (group) transmitted by the TRPs constituting the third TRP set exists at frequency GG1 and time G1.) At this time, assume that the "modulation signal (group) 1382_2 for the fourth TRP set" exists at frequency GG1 and time G1, as shown in Figure 13G1. (Assume that the transmission signal (group) transmitted by the TRPs constituting the fourth TRP set exists at frequency GG1 and time G1.)

[0685] SDM Example 2-2: Assume that the "modulation signal (group) 1382_1 for the third TRP set" exists at frequency GG1 and time G1, as shown in Figure 13G1. (Assume that the transmission signal (group) transmitted by the TRPs constituting the third TRP set exists at frequency GG1 and time G1.) At this time, assume that the "modulation signal (group) 1382_2 for the fourth TRP set" exists at part of frequency GG1 and time G1, as shown in Figure 13G2. (Assume that the transmission signal (group) transmitted by the TRPs constituting the fourth TRP set exists at part of frequency GG1 and time G1.)

[0686] SDM Example 2-3: Assume that the "modulation signal (group) 1382_1 for the third TRP set" exists at frequency GG1 and time G1, as shown in Figure 13G1. (Assume that the transmission signal (group) transmitted by the TRPs constituting the third TRP set exists at frequency GG1 and time G1.) At this time, assume that the "modulation signal (group) 1382_2 for the fourth TRP set" exists at frequency GG1 and part of time G1, as shown in Figure 13G3. (Assume that the transmission signal (group) transmitted by the TRPs constituting the fourth TRP set exists at frequency GG1 and part of time G1.)

[0687] SDM Example 2-4: Assume that the "modulation signal (group) 1382_1 for the third TRP set" exists at frequency GG1 and time G1, as shown in Figure 13G1. (Assume that the transmission signal (group) transmitted by the TRPs constituting the third TRP set exists at frequency GG1 and time G1.) At this time, assume that the "modulation signal (group) 1382_2 for the fourth TRP set" exists at part of frequency GG1 and part of time G1, as shown in Figure 13G4. (Assume that the transmission signal (group) transmitted by the TRPs constituting the fourth TRP set exists at part of frequency GG1 and part of time G1.)

[0688] SDM Example 2-5: Assume that the "modulation signal (group) 1382_1 for the third TRP set" exists at frequency GG1 and time G1, as shown in Figure 13G1. (Assume that the transmission signal (group) transmitted by the TRPs constituting the third TRP set exists at frequency GG1 and time G1.) In this case, the frequency and time used by the "modulation signal (group) 1382_2 for the fourth TRP set" overlap with part of frequency GG1 and / or part of time G1. (Assume that the frequency and time used by the transmission signal (group) transmitted by the TRPs constituting the fourth TRP set overlap with part of frequency GG1 and / or part of time G1.)

[0689] In addition, the "modulated signal (group) for the third TRP set" and the "modulated signal (group) for the fourth TRP set" may be transmitted using a TDM (Time Division Multiplexing) method (e.g., tdmScheme, non-overlapping, etc.). Examples of the arrangement on the time-frequency axis in this case are shown in Figures 13H1 and 13H2. In Figures 13H1 and 13H2, the horizontal axis represents time and the vertical axis represents frequency.

[0690] TDM Example 2-1: Assume that the "modulation signal (group) 1382_1 for the third TRP set" exists at frequency HH1 and time H1, as shown in Figure 13H1. (Assume that the transmission signal (group) transmitted by the TRPs constituting the third TRP set exists at frequency HH1 and time H1.) At this time, assume that the "modulation signal (group) 1382_2 for the fourth TRP set" exists at frequency HH1 and time H2, as shown in Figure 13H1. (Assume that the transmission signal (group) transmitted by the TRPs constituting the fourth TRP set exists at frequency HH1 and time H2.)

[0691] TDM Example 2-2: Assume that the "modulation signal (group) 1382_1 for the third TRP set" exists at frequency HH1 and time H1, as shown in Figure 13H2. (Assume that the transmission signal (group) transmitted by the TRPs constituting the third TRP set exists at frequency HH1 and time H1.) At this time, assume that the "modulation signal (group) 1382_2 for the fourth TRP set" exists at part of frequency HH1, time H2, as shown in Figure 13H2. (Assume that the transmission signal (group) transmitted by the TRPs constituting the fourth TRP set exists at frequency HH1 and time H2.)

[0692] The "modulated signal (group) for the third TRP set" and the "modulated signal (group) for the fourth TRP set" may be transmitted using an FDM (Frequency Division Multiplexing) method (e.g., fdmScheme, non-overlapping, etc.). Examples of the arrangement on the time-frequency axis in this case are shown in Figures 13I1, 13I2, and 13I3. In Figures 13I1, 13I2, and 13I3, the horizontal axis represents time and the vertical axis represents frequency.

[0693] FDM Example 2-1: Assume that the "modulation signal(s) 1382_1 for the third TRP set" exists at frequency II_1 and time I_1, as shown in Figure 13I1. (Assume that the transmission signal(s) transmitted by the TRPs constituting the third TRP set exist at frequency II_1 and time I_1.) At this time, assume that the "modulation signal(s) 1382_2 for the fourth TRP set" exists at frequency II_2 and time I_1, as shown in Figure 13I1. (Assume that the transmission signal(s) transmitted by the TRPs constituting the fourth TRP set exist at frequency II_2 and time I_1.)

[0694] FDM Example 2-2: Assume that the "modulation signal(s) 1382_1 for the third TRP set" exists at frequency II_1 and time I_1, as shown in Figure 13I2. (Assume that the transmission signal(s) transmitted by the TRPs constituting the third TRP set exist at frequency II_1 and time I_1.) At this time, assume that the "modulation signal(s) 1382_2 for the fourth TRP set" exists at frequency II_2 and part of time I_1, as shown in Figure 13I2. (Assume that the transmission signal(s) transmitted by the TRPs constituting the fourth TRP set exist at frequency II_2 and part of time I_1.)

[0695] FDM Example 2-3: Assume that the "modulation signal(s) 1382_1 for the third TRP set" exists at frequency II_1 and time I_1, as shown in Figure 13I3. (Assume that the transmission signal(s) transmitted by the TRPs constituting the third TRP set exist at frequency II_1 and time I_1.) At this time, assume that the "modulation signal(s) 1382_2 for the fourth TRP set" exists at frequency II_2 and time I_2, as shown in Figure 13I3. (Assume that the transmission signal(s) transmitted by the TRPs constituting the fourth TRP set exist at frequency II_2 and time I_2.)

[0696] FDM Example 2-4: Assume that the "modulation signal(s) 1382_1 for the third TRP set" exists at frequency II_1 and time I_1. (Assume that the transmission signal(s) transmitted by the TRPs constituting the third TRP set exist at frequency II_1 and time I_1.) At this time, assume that the "modulation signal(s) 1382_2 for the fourth TRP set" exists at frequency II_2 and time I_2. (Assume that the transmission signal(s) transmitted by the TRPs constituting the fourth TRP set exist at frequency II_2 and time I_2.) Furthermore, time I_1 and time I_2 partially overlap.

[0697] By doing so, the effect of improving the data reception quality at the terminal that is the communication partner of the base station can be obtained, and the effect of improving the data transmission efficiency of the system can be obtained. In addition, since the TRP set transmits multiple sets of modulated signals, and the terminal can receive multiple sets of modulated signals, the effect of improving the data transmission efficiency and improving the data reception quality can be obtained.

[0698] In addition, the third "modulation signal" set, "modulation signal (group) for the third TRP set," and the fourth "modulation signal" set, "modulation signal (group) for the fourth TRP set," in the above description, may contain the same data. Therefore, repetition may be applied to the third "modulation signal" set, "modulation signal (group) for the third TRP set," and the fourth "modulation signal" set, "modulation signal (group) for the fourth TRP set."

[0699] Furthermore, when the SDM method, TDM method, or FDM method is applied, the arrangement on the time-frequency axis of the third ``modulated signal'' set, ``modulated signals (group) for the third TRP set,'' and the fourth ``modulated signal'' set, ``modulated signals (group) for the fourth TRP set,'' is not limited to the examples of Figures 13G1, 13G2, 13G3, 13G4, 13H1, 13H2, 13I1, 13I2, and 13I3.

[0700] The "transmission signal set including the third "modulation signal" set, "modulation signal (group) for the third TRP set"" and the "transmission signal set including the fourth "modulation signal" set, "modulation signal (group) for the fourth TRP set"" may be in a (full) coherent relationship, a partial coherent relationship, or a non-coherent relationship.

[0701] A base station, gNB, repeater, etc. may be configured using a TRP set consisting of multiple TRPs.

[0702] As described above, when there is a TRP set consisting of multiple TRPs, and the multiple TRP sets transmit multiple modulated signal sets to a terminal, the multiple TRP sets may select one of the above-described "SDM method, TDM method, FDM method," and the multiple TRP sets may transmit multiple modulated signal sets using the selected method.

[0703] The time and frequency positions of the multiple modulation signal sets of each method may be controlled by the TRP or by the device 1303. For example, this control may be performed by the base station or by a device connected to the base station.

[0704] The first TRP set in Figures 13A1, 13A2, and 13A3 may be configured in one device (e.g., a base station, a gNB, etc.) or in multiple devices.

[0705] The first TRP set in Figures 13A1, 13A2, and 13A3 may be included in one device (e.g., a base station, a gNB, etc.) or in multiple devices.

[0706] The second TRP set in Figures 13A1, 13A2, and 13A3 may be configured in one device (e.g., a base station, a gNB, etc.) or in multiple devices.

[0707] The second TRP set in Figures 13A1, 13A2, and 13A3 may be included in one device (e.g., a base station, a gNB, etc.) or in multiple devices.

[0708] The "first TRP set and second TRP set" in Figures 13A1, 13A2, and 13A3 may be composed of a single device (e.g., a base station, a gNB, etc.) or multiple devices.

[0709] The "first TRP set and second TRP set" in Figures 13A1, 13A2, and 13A3 may be included in one device (e.g., a base station, a gNB, etc.) or multiple devices.

[0710] The third TRP set in Figures 13F1, 13F2, and 13F3 may be configured in one device (e.g., a base station, a gNB, etc.) or in multiple devices.

[0711] The third TRP set in Figures 13F1, 13F2, and 13F3 may be included in one device (e.g., a base station, a gNB, etc.) or in multiple devices.

[0712] The fourth TRP set in Figures 13F1, 13F2, and 13F3 may be configured in one device (e.g., a base station, a gNB, etc.) or in multiple devices.

[0713] The fourth TRP set in Figures 13F1, 13F2, and 13F3 may be included in one device (e.g., a base station, a gNB, etc.) or in multiple devices.

[0714] The "third TRP set and fourth TRP set" in Figures 13F1, 13F2, and 13F3 may be composed of a single device (e.g., a base station, a gNB, etc.) or multiple devices.

[0715] The "third TRP set and fourth TRP set" in Figures 13F1, 13F2, and 13F3 may be included in one device (e.g., a base station, a gNB, etc.) or multiple devices.

[0716] In this embodiment, we have explained an example in which a set of TRPs transmits one set of "modulated signals" using "Figures 6A1, 6A2, and 6A3," and an example in which a set of TRPs transmits two sets of "modulated signals" using "Figures 13A1, 13A2, and 13A3" and "Figures 13F1, 13F2, and 13F3," but it is also possible to implement the same method even if a set of TRPs transmits three or more sets of "modulated signals."

[0717] The TRP may use the first antenna module v of 106A_1_v and the second antenna module #w of 106A_2_w as a receiving antenna. In this case, the TRP may receive a modulated signal transmitted by a terminal with which it is communicating.

[0718] In addition, the antenna port of the TRP may be used as a receiving antenna, and in this case, the TRP may receive a modulated signal transmitted by a terminal with which it is communicating.

[0719] The configuration methods of devices such as TRPs and terminals described in this embodiment, and the communication methods implemented (e.g., antenna module configuration, number of antenna modules, antenna port configuration, number of antenna ports, precoding method, frame configuration, number of transmitted signals, number of received signals, etc.) are considered to be examples described in this specification, but are not limited to these examples.

[0720] The terminal may use a transmission method using the antenna module described in this embodiment, and may have the configuration of the device described in this embodiment.

[0721] The TRP may transmit a modulated signal using an antenna port, but in this case, a unique signal is assigned to each antenna port as an RS such as a DMRS in order to notify the communication partner of the number of the antenna port being used (so that the communication partner can identify the antenna port being used to transmit the modulated signal).

[0722] When transmitting a modulated signal, the TRP also transmits a (unique) RS corresponding to the antenna port used to transmit the modulated signal.

[0723] At this time, a unique signal may be assigned to the RS so that the RS can identify whether or not the antenna module is being used, whether or not the first antenna module is being used, and whether or not the second antenna module is being used.

[0724] For example, there may be a unique signal when transmitting using the antenna module, and the TRP will transmit a signal that includes this unique signal when transmitting using the antenna module.

[0725] There may be a unique signal when transmitting using the first antenna module, and the TRP will transmit a signal that includes this unique signal when transmitting using the antenna module.

[0726] There may be a unique signal when transmitting using the second antenna module, and the TRP will transmit a signal including this unique signal when transmitting using the antenna module.

[0727] Then, by receiving the modulated signal transmitted by the TRP, the communication partner of the TRP can know the type of the TRP (for example, the TRP using the first antenna module, the TRP using the second antenna module, or the TRP using the first antenna module and the second antenna module). This makes it easier for the communication partner of the TRP to select a suitable method for transmitting the modulated signal.

[0728] (Embodiment 3) In embodiment 2, a downlink in which a TRP transmits a modulated signal to a terminal is described. In embodiment 3, an uplink in which a terminal transmits a modulated signal to a TRP is described.

[0729] FIG. 14A1 shows an example of the configuration of a communication device (transmitting / receiving device) such as a terminal in this embodiment.

[0730] For example, antenna 1431A receives a signal transmitted by a base station with which the communication is being conducted, and obtains received signal 1432A. Reception processing section 1433A then receives received signal 1432A, processes it for reception, and outputs reception status information 1435A and received data 1434A.

[0731] Control unit 1491A receives control information 1490A, received data 1434A, and reception status information 1435A as input, and outputs control signal 1492A including "control information for the transmission method, control information for the precoding method, control information for the antenna unit, etc."

[0732] The transmission processing unit ♭1 of 1402A_1 receives the transmission data 1401A_1 and the control signal 1492A as input, and performs processing such as error correction coding and mapping based on information such as the modulation method and error correction coding method (error correction code, coding rate, etc.) included in the control signal 1492A, generates a modulated signal, and outputs the modulated signal ♭1 of 1403A_1.

[0733] Therefore, the transmission processing unit ♭u of 1402A_u receives the transmission data 1401A_u and the control signal 1492A as input, and performs processes such as error correction coding and mapping (modulation based on the modulation method) based on information such as the modulation method and error correction coding method (error correction code, coding rate, etc.) included in the control signal 1492A, generates a modulated signal, and outputs the modulated signal ♭u of 1403A_u. Note that u is an integer between 1 and P inclusive. In this case, P is an integer greater than or equal to 1, or an integer greater than or equal to 2. The modulated signal ♭u of 1403A_u can also be considered a mapped signal, a baseband signal.

[0734] The transmission processing unit ♭u (u is an integer between 1 and P) of 1402A_u may have the configuration shown in Fig. 14A2. In Fig. 14A2, components that operate in the same manner as in Fig. 14A1 are assigned the same numbers.

[0735] Transmission processing unit 1402a in FIG. 14A2 receives transmission data 1401a and control signal 1492A as input, and performs processes such as error correction coding and mapping (modulation based on the modulation method) based on information such as the modulation method and error correction coding method (error correction code, coding rate, etc.) included in control signal 1492A, generates a modulated signal, and outputs modulated signal ♭u of 1403A_u. Note that u is an integer between 1 and P inclusive. In this case, P is an integer greater than or equal to 1, or an integer greater than or equal to 2. Modulated signal ♭u of 1403A_u can also be considered a mapped signal, a baseband signal.

[0736] In addition, the transmission processing unit ♭u (u is an integer between 1 and P) of 1402A_u may have the configuration shown in Figure 14A3. In Figure 14A3, components that operate in the same manner as in Figure 14A2 are assigned the same numbers. In Figure 14A3, a portion of the modulated signal ♭u of 1403A_u is used as the first "modulated signal" set addressed to the first TRP set, and a portion of the modulated signal ♭u of 1403A_u is used as the second "modulated signal" set addressed to the second TRP set.

[0737] As in Figure 14A3, in Figure 14A1, a portion of the modulated signal ♭u of 1403A_u may be the first "modulated signal" set addressed to the first TRP set, and a portion of the modulated signal ♭u of 1403A_u may be the second "modulated signal" set addressed to the second TRP set.

[0738] The transmission processing unit ♭u (u is an integer between 1 and P) of 1402A_u may have the configuration shown in Figure 14A4. In Figure 14A4, components that operate in the same manner as in Figure 14A2 are assigned the same numbers. In Figure 14A4, a portion of the modulated signal ♭u of 1403A_u is used as a third "modulated signal" set addressed to the third TRP set, and a portion of the modulated signal ♭u of 1403A_u is used as a fourth "modulated signal" set addressed to the fourth TRP set.

[0739] As in Figure 14A3, in Figure 14A1, a portion of the modulated signal ♭u of 1403A_u may be the third "modulated signal" set addressed to the third TRP set, and a portion of the modulated signal ♭u of 1403A_u may be the fourth "modulated signal" set addressed to the fourth TRP set.

[0740] The precoding unit 1404A in Figure 14A1 receives as input "modulated signal ♭1 of 1403A_1, modulated signal ♭2 of 1403A_2, ..., modulated signal ♭P of 1403A_P" and control signal 1492A, performs precoding based on the precoding information included in control signal 1492A, and outputs "signal group 1 after precoding of 1405A_1, signal group 2 after precoding of 1405A_2, ..., signal group Q after precoding of 1405A_Q."

[0741] It is not necessary for all of "signal group 1 after precoding of 1405A_1, signal group 2 after precoding of 1405A_2, ..., signal group Q after precoding of 1405A_Q" to exist.

[0742] The radio processing unit 1 of 1411A_1 receives the precoded signal group 1 of 1405A_1 and the control signal 1492A as input, performs processing such as frequency conversion on the precoded signal group 1 of 1405A_1, and generates and outputs the transmission signal group 1 of 1412A_1.

[0743] Therefore, the radio processing unit v of 1411A_v receives the precoded signal group v of 1405A_v and the control signal 1492A as input, performs processing such as frequency conversion on the precoded signal group v of 1405A_v, and generates and outputs the transmission signal group v of 1412A_v. Note that v is an integer between 1 and Q, and Q is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0744] The antenna unit 1 of 1406A_1 receives the transmission signal group 1 of 1412A_1 and the control signal 1492A as input, and outputs the transmission signal group 1 of 1412A_1 as radio waves. Note that the antenna unit 1 of 1406A_1 may perform beamforming (directivity control) based on the control signal 1492A.

[0745] Therefore, the antenna unit v of 1406A_v receives the transmission signal group v of 1412A_v and the control signal 1492A as input, and outputs the transmission signal group v of 1412A_v as radio waves. Note that v is an integer between 1 and Q, inclusive, and Q is an integer greater than or equal to 1 or an integer greater than or equal to 2. The antenna unit v of 1406A_v may then perform beamforming (directivity control) based on the control signal 1492A.

[0746] In addition, the antenna section v of 1406A_v, which is a transmitting antenna, and the "antenna 1431A", which is a receiving antenna, may be shared and configured as a "transmitting and receiving antenna module" and a "transmitting and receiving antenna".

[0747] Fig. 14B shows an example of the configuration of a communication device (transmitter / receiver) in this embodiment, such as a terminal, which is different from Fig. 14A1. In Fig. 14B, components that operate in the same manner as in Fig. 14A1 are given the same numbers, and some of the explanations have already been given, so they will not be repeated.

[0748] For example, antenna 1431A receives a signal transmitted by a base station with which the communication is being conducted, and obtains received signal 1432A. Reception processing section 1433A then receives received signal 1432A, processes it for reception, and outputs reception status information 1435A and received data 1434A.

[0749] Control unit 1491A receives control information 1490A, received data 1434A, and reception status information 1435A as input, and outputs control signal 1492A including "control information for the transmission method, control information for the precoding method, control information for the antenna unit, etc."

[0750] The transmission processing unit ♭1 of 1402A_1 receives the transmission data 1401A_1 and the control signal 1492A as input, and performs processing such as error correction coding and mapping (modulation based on the modulation method) based on information such as the modulation method and error correction coding method (error correction code, coding rate, etc.) included in the control signal 1492A, generates a modulated signal, and outputs the modulated signal ♭1 of 1403A_1.

[0751] Therefore, the transmission processing unit ♭u of 1402A_u receives the transmission data 1401A_u and the control signal 1492A as input, and performs processes such as error correction coding and mapping (modulation based on the modulation method) based on information such as the modulation method and error correction coding method (error correction code, coding rate, etc.) included in the control signal 1492A, generates a modulated signal, and outputs the modulated signal ♭u of 1403A_u. Note that u is an integer between 1 and P inclusive. In this case, P is an integer greater than or equal to 1, or an integer greater than or equal to 2. The modulated signal ♭u of 1403A_u can also be considered a mapped signal, a baseband signal.

[0752] The transmission processing unit ♭u (u is an integer between 1 and P) of 1402A_u may have the configuration shown in Fig. 14A2. In Fig. 14A2, components that operate in the same manner as in Fig. 14A1 are assigned the same numbers.

[0753] Transmission processing unit 1402a in FIG. 14A2 receives transmission data 1401a and control signal 1492A as input, and performs processes such as error correction coding and mapping (modulation based on the modulation method) based on information such as the modulation method and error correction coding method (error correction code, coding rate, etc.) included in control signal 1492A, generates a modulated signal, and outputs modulated signal ♭u of 1403A_u. Note that u is an integer between 1 and P inclusive. In this case, P is an integer greater than or equal to 1, or an integer greater than or equal to 2. Modulated signal ♭u of 1403A_u can also be considered a mapped signal, a baseband signal.

[0754] In addition, the transmission processing unit ♭u (u is an integer between 1 and P) of 1402A_u may have the configuration shown in Figure 14A3. In Figure 14A3, components that operate in the same manner as in Figure 14A2 are assigned the same numbers. In Figure 14A3, a portion of the modulated signal ♭u of 1403A_u is used as the first "modulated signal" set addressed to the first TRP set, and a portion of the modulated signal ♭u of 1403A_u is used as the second "modulated signal" set addressed to the second TRP set.

[0755] As in Figure 14A3, in Figure 14B, part (or all) of the modulated signal ♭u of 1403A_u may be the first "modulated signal" set addressed to the first TRP set, and part (or all) of the modulated signal ♭u of 1403A_u may be the second "modulated signal" set addressed to the second TRP set.

[0756] The transmission processing unit ♭u (u is an integer between 1 and P) of 1402A_u may have the configuration shown in Figure 14A4. In Figure 14A4, components that operate in the same manner as in Figure 14A2 are assigned the same numbers. In Figure 14A4, a portion of the modulated signal ♭u of 1403A_u is used as a third "modulated signal" set addressed to the third TRP set, and a portion of the modulated signal ♭u of 1403A_u is used as a fourth "modulated signal" set addressed to the fourth TRP set.

[0757] As in Figure 14A3, in Figure 14B, a portion of the modulated signal ♭u of 1403A_u may be the third "modulated signal" set addressed to the third TRP set, and a portion of the modulated signal ♭u of 1403A_u may be the fourth "modulated signal" set addressed to the fourth TRP set.

[0758] Signal generation unit 1430B in Figure 14B receives as input "modulated signal ♭1 of 1403A_1, modulated signal ♭2 of 1403A_2, ..., modulated signal ♭P of 1403A_P" and control signal 1492A, and generates a signal group from "modulated signal ♭1 of 1403A_1, modulated signal ♭2 of 1403A_2, ..., modulated signal ♭P of 1403A_P" based on control signal 1492A, and outputs "signal group 1 of 1431B_1, signal group 2 of 1431B_2, ..., signal group Q of 1431B_Q."

[0759] It is not necessary for all of "signal group 1 of 1431B_1, signal group 2 of 1431B_2, ..., signal group Q of 1431B_Q" to be present.

[0760] The precoding unit 1 of 1432B_1 receives signal group 1 of 1431B_1 and control signal 1492A as input, performs precoding on signal group 1 of 1431B_1 based on the precoding information contained in control signal 1492A, and outputs precoded signal group 1 of 1433B_1.

[0761] Therefore, the precoding unit v of 1432B_v receives the signal group v of 1431B_v and the control signal 1492A as input, performs precoding on the signal group v of 1431B_v based on the precoding information included in the control signal 1492A, and outputs the precoded signal group v of 1433B_v. Note that v is an integer between 1 and Q, and Q is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0762] The radio processing unit 1 of 1411A_1 receives the precoded signal group 1 of 1433B_1 and the control signal 1492A as input, performs processing such as frequency conversion on the precoded signal group 1 of 1433B_1, and generates and outputs the transmission signal group 1 of 1412A_1.

[0763] Therefore, the radio processing unit v of 1411A_v receives the precoded signal group v of 1433B_v and the control signal 1492A as input, performs processing such as frequency conversion on the precoded signal group v of 1433B_v, and generates and outputs the transmission signal group v of 1412A_v. Note that v is an integer between 1 and Q, and Q is an integer greater than or equal to 1 or an integer greater than or equal to 2.

[0764] The antenna unit 1 of 1406A_1 receives the transmission signal group 1 of 1412A_1 and the control signal 1492A as input, and outputs the transmission signal group 1 of 1412A_1 as radio waves. Note that the antenna unit 1 of 1406A_1 may perform beamforming (directivity control) based on the control signal 1492A.

[0765] Therefore, the antenna unit v of 1406A_v receives the transmission signal group v of 1412A_v and the control signal 1492A as input, and outputs the transmission signal group v of 1412A_v as radio waves. Note that v is an integer between 1 and Q, inclusive, and Q is an integer greater than or equal to 1 or an integer greater than or equal to 2. The antenna unit v of 1406A_v may then perform beamforming (directivity control) based on the control signal 1492A.

[0766] In addition, the antenna section v of 1406A_v, which is a transmitting antenna, and the "antenna 1431A", which is a receiving antenna, may be shared and configured as a "transmitting and receiving antenna module" and a "transmitting and receiving antenna".

[0767] The antenna unit v of 1406A_v in Figures 14A1 and 14B includes one or more antennas, or two or more antennas. In this case, each antenna constituting the antenna unit v of 1406A_v may have a configuration as shown in Figure 1C1 and be capable of beamforming (directivity control). However, the configuration of each antenna constituting the antenna unit v of 1406A_v is not limited to this, and for example, each antenna constituting the antenna unit v of 1406A_v may be composed of a single antenna.

[0768] Fig. 1C1 shows an example of the configuration of the antennas provided in antenna unit v of 1406A_v in Figs. 14A1 and 14B. Note that v is an integer between 1 and Q. However, the number of antennas constituting the antenna provided in antenna unit v of 1406A_v is not limited to four, as long as it is one or more. Fig. 1C1 has already been explained, so its explanation will be omitted.

[0769] The antenna unit v of 1406A_v in Figures 14A1 and 14B includes one or more antennas, or two or more antennas. In this case, each antenna constituting the antenna unit v of 1406A_v may have a configuration as shown in Figure 1C2 and may be capable of beamforming (directivity control).

[0770] Fig. 1C2 shows an example of the configuration of an antenna provided in antenna unit v of 1406A_v in Fig. 14A1 and Fig. 14B. Note that v is an integer between 1 and Q. Fig. 1C2 has already been described, so its description will be omitted.

[0771] The configuration of the transmitting unit and receiving unit of the TRP, which is the communication partner of the terminal, has been explained in the first and second embodiments, so a detailed explanation will be omitted.

[0772] The TRP may have configurations such as those shown in Figures 1A1, 1B, 5A, 5C, 5E, 5G, 7A, 7B, 8A, 8B, 10A, 10B, 11A, 11B, 12A, and 12B, and the antenna modules and antenna ports shown in these figures may be used as "antennas, antenna modules, and antenna ports" for reception. In this case, the TRP receives the transmission signal transmitted by the terminal using these "antennas, antenna modules, and antenna ports."

[0773] Alternatively, the TRP may be provided with a separate "antenna, antenna module, antenna port" for receiving, and the TRP may receive the transmission signal sent by the terminal using the "antenna, antenna module, antenna port" for receiving.

[0774] The case of uplink where a terminal transmits a modulated signal to a TRP will be described.

[0775] Fig. 14C shows an example of the state of the TRP and the terminal. In Fig. 14C, the same parts as Fig. 13A1 etc. are assigned the same numbers, and the explanation of the parts that have already been explained will be omitted.

[0776] "TRP_1#1_1 of 1311_1," "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1" are called the first TRP set. Also, "TRP_2#1_1 of 1321_1," "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2" are called the second TRP set.

[0777] As shown in Figure 14C, terminal #1 of 1390_1 transmits a first "modulation signal" set to a first TRP set and a second "modulation signal" set to a second TRP set. Therefore, Figure 14C is an example in which a terminal transmits transmission signals to multiple TRP sets, and can be said to be an example of uplink multiple TRP.

[0778] In addition, terminal #1 of 1390_1 may perform the following operations: "send a first set of "modulated signals" addressed to the first TRP set to the first TRP set" or "send a second set of "modulated signals" addressed to the second TRP set to the second TRP set."

[0779] Device 1 1451_1 receives as input "a signal based on a signal received by TRP_1#1_1 of 1311_1," "a signal based on a signal received by TRP_1#2_1 of 1312_1," ..., "a signal based on a signal received by TRP_1#2_Y1 of 1312_Y1," and performs processes such as demodulation and decoding of error correction codes to obtain and output data 1452_1 contained in the first "modulated signal" set.

[0780] Device 2 1451_2 receives as input "a signal based on a signal received by TRP_2#1_1 of 1321_1," "a signal based on a signal received by TRP_2#2_1 of 1322_1," ..., "a signal based on a signal received by TRP_2#2_Y2 of 1322_Y2," and performs processes such as demodulation and decoding of error correction codes to obtain and output data 1452_2 contained in the second "modulated signal" set.

[0781] The first "modulated signal" set addressed to the first TRP set transmitted by terminal #1 of 1390_1 in Figure 14C includes one of the modulated signals ♭u of 1403A_u. Also, the second "modulated signal" set addressed to the second TRP set transmitted by terminal #1 of 1390_1 includes one of the modulated signals ♭u of 1403A_u.

[0782] FIG. 15A1 shows an example of the configuration of a system made up of "TRP_1#1_1 of 1311_1," "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1," and device 1 of 1451_1 in FIG. 14C.

[0783] "TRP_1#1_1 of 1311_1" includes, for example, the antenna module group 1#1_1 of 1511A_1_1 and the signal processing unit 1#1_1 of 1513A_1_1.

[0784] "TRP_1#2_1 of 1312_1" includes, for example, the antenna module group 1#2_1 of 1521A_1_1 and the signal processing unit 1#2_1 of 1523A_1_1.

[0785] Therefore, "TRP_1#2_n of 1312_n" includes, for example, antenna module group 1#2_n of 1521A_1_n and signal processing unit 1#2_n of 1523A_1_n, where n is an integer between 1 and Y1.

[0786] The device 1451_1 includes, for example, a signal processing unit 1530A_1 and a control unit 1541A_1.

[0787] The control section 1541A_1 receives the signal 1540_1 as input, and outputs a control signal 1542A_1 including information such as information on the signal processing method.

[0788] In "TRP_1#1_1 of 1311_1," the signal processing unit 1#1_1 of 1513A_1_1 receives as input a group of received signals 1512A_1_1 and a control signal 1542A_1 received by the group of antenna modules 1#1_1 of 1511A_1_1, determines an operation method based on the control signal 1542A_1, performs processing such as frequency conversion, and outputs a group of received signals 1514A_1_1 after signal processing.

[0789] In "TRP_1#2_1 of 1312_1," the signal processing unit 1#2_1 of 1523A_1_1 receives as input a group of received signals 1522A_1_1 and a control signal 1542A_1 received by the group of antenna modules 1#2_1 of 1521A_1_1, determines an operation method based on the control signal 1542A_1, performs processing such as frequency conversion, and outputs a group of received signals 1524A_1_1 after signal processing.

[0790] Therefore, in "TRP_1#2_n of 1312_n", the signal processing unit 1#2_n of 1523A_1_n receives as input the received signal group 1522A_1_n and the control signal 1542A_1 received by the antenna module group 1#2_n of 1521A_1_n, determines the operation method based on the control signal 1542A_1, performs processing such as frequency conversion, and outputs the received signal group 1524A_1_n after signal processing.

[0791] In device 1 of 1451_1, signal processing unit 1530A_1 receives control signal 1542A_1, group of received signals after signal processing 1514A_1_1, "group of received signals after signal processing 1524A_1_1, ... group of received signals after signal processing 1524A_1_Y1", and performs processing such as demodulation and error correction decoding on "group of received signals after signal processing 1514A_1_1, "group of received signals after signal processing 1524A_1_1, ... group of received signals after signal processing 1524A_1_Y1" based on control signal 1542A_1, to obtain and output received data 1531A_1.

[0792] FIG. 15A2 shows an example of the configuration of a system made up of "TRP_2#1_1 of 1321_1," "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2," and device 2 of 1451_2 in FIG. 14C.

[0793] "TRP_2#1_1 of 1321_1" includes, for example, the antenna module group 2#1_1 of 1511A_2_1 and the signal processing unit 2#1_1 of 1513A_2_1.

[0794] "TRP_2#2_1 of 1322_1" includes, for example, the antenna module group 2#2_1 of 1521A_2_1 and the signal processing unit 2#2_1 of 1523A_2_1.

[0795] Therefore, "TRP_2#2_m of 1322_m" includes, for example, antenna module group 2#2_m of 1521A_2_m and signal processing unit 2#2_m of 1523A_2_m, where m is an integer between 1 and Y2.

[0796] The device 2 of 1451_2 includes, for example, a signal processing unit 1530A_2 and a control unit 1541A_2.

[0797] The control unit 1541A_2 receives the signal 1540_2 as input, and outputs a control signal 1542A_2 including information such as information on the signal processing method.

[0798] In "TRP_2#1_1 of 1321_1," the signal processing unit 2#1_1 of 1513A_2_1 receives as input a group of received signals 1512A_2_1 and a control signal 1542A_2 received by the group of antenna modules 2#1_1 of 1511A_2_1, determines an operation method based on the control signal 1542A_2, performs processing such as frequency conversion, and outputs a group of received signals 1514A_2_1 after signal processing.

[0799] In "TRP_2#2_1 of 1322_1," the signal processing unit 2#2_1 of 1523A_2_1 receives as input a group of received signals 1522A_2_1 and a control signal 1542A_2 received by the group of antenna modules 2#2_1 of 1521A_2_1, determines an operation method based on the control signal 1542A_2, performs processing such as frequency conversion, and outputs a group of received signals 1524A_2_1 after signal processing.

[0800] Therefore, in "TRP_2#2_m of 1322_m," the signal processing unit 2#2_m of 1523A_2_m receives as input the received signal group 1522A_2_m received by the antenna module group 2#2_m of 1521A_2_m and the control signal 1542A_2, determines the operation method based on the control signal 1542A_2, performs processing such as frequency conversion, and outputs the received signal group 1524A_2_m after signal processing.

[0801] In device 2 of 1451_2, signal processing unit 1530A_2 receives control signal 1542A_2, group of received signals after signal processing 1514A_2_1, "group of received signals after signal processing 1524A_2_1, ... group of received signals after signal processing 1524A_2_Y2" as input, and performs processing such as demodulation and error correction decoding on "group of received signals after signal processing 1514A_2_1, "group of received signals after signal processing 1524A_2_1, ... group of received signals after signal processing 1524A_2_Y2" based on control signal 1542A_2, to obtain and output received data 1531A_2.

[0802] Figure 16 shows an example of the state of the TRP and the terminal different from Figure 14C. In Figure 16, the same numbers are used for the same parts as in Figure 13A1, and the explanation of the parts that have already been explained will be omitted.

[0803] "TRP_1#1_1 of 1311_1," "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1" are called the first TRP set. Also, "TRP_2#1_1 of 1321_1," "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2" are called the second TRP set.

[0804] As shown in Figure 16, terminal #1 of 1390_1 transmits a first "modulation signal" set to a first TRP set and a second "modulation signal" set to a second TRP set. Therefore, Figure 16 is an example in which a terminal transmits transmission signals to multiple TRP sets, and can be said to be an example of uplink multiple TRP.

[0805] In addition, terminal #1 of 1390_1 may perform the following operations: "send a first set of "modulated signals" addressed to the first TRP set to the first TRP set" or "send a second set of "modulated signals" addressed to the second TRP set to the second TRP set."

[0806] TRP_1#1_1 of 1311_1 takes as input "signal 1612_1 based on the signal received by TRP_1#2_1 of 1312_1," ..., "signal 1612_Y1 based on the signal received by TRP_1#2_Y1 of 1312_Y1," and performs processes such as demodulation and decoding of error correction codes on the "signal based on the signal received by TRP_1#1_1 of 1311_1" that it generated itself, and "signal 1612_1 based on the signal received by TRP_1#2_1 of 1312_1," ..., "signal 1612_Y1 based on the signal received by TRP_1#2_Y1 of 1312_Y1," and obtains and outputs data 1611_1 contained in the first "modulated signal" set.

[0807] TRP_2#1_1 of 1321_1 receives as input "signal 1622_1 based on the signal received by TRP_2#2_1 of 1322_1," ..., "signal 1622_Y2 based on the signal received by TRP_2#2_Y2 of 1322_Y2," and TRP_2#1_1 of 1321_1 performs processes such as demodulation and decoding of error correction codes on the "signal based on the signal received by TRP_2#1_1 of 1321_1" that it generated itself, and "signal 1622_1 based on the signal received by TRP_2#2_1 of 1322_1," ..., "signal 1622_Y2 based on the signal received by TRP_2#2_Y2 of 1322_Y2," and obtains and outputs data 1621_1 contained in the second "modulated signal" set.

[0808] The first "modulated signal" set addressed to the first TRP set transmitted by terminal #1 of 1390_1 in Figure 16 includes one of the modulated signals ♭u of 1403A_u. Also, the second "modulated signal" set addressed to the second TRP set transmitted by terminal #1 of 1390_1 includes one of the modulated signals ♭u of 1403A_u.

[0809] Fig. 17A1 shows an example of the configuration of a system configured with "TRP_1#1_1 of 1311_1," "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1" in Fig. 16. In Fig. 17A1, the same numbers are used for components that operate in the same way as in Fig. 15A1, and some explanations will be omitted.

[0810] "TRP_1#1_1 of 1311_1" includes, for example, the antenna module group 1#1_1 of 1511A_1_1, the signal processing unit 1#1_1 of 1513A_1_1, the signal processing unit 1530A_1, and the control unit 1541A_1.

[0811] "TRP_1#2_1 of 1312_1" includes, for example, the antenna module group 1#2_1 of 1521A_1_1 and the signal processing unit 1#2_1 of 1523A_1_1.

[0812] Therefore, "TRP_1#2_n of 1312_n" includes, for example, antenna module group 1#2_n of 1521A_1_n and signal processing unit 1#2_n of 1523A_1_n, where n is an integer between 1 and Y1.

[0813] The operations of the "control unit 1541A_1," "signal processing unit 1530A_1," "antenna module group 1#1_1 of 1511A_1_1, signal processing unit 1#1_1 of 1513A_1_1," and "antenna module group 1#2_n of 1521A_1_n, signal processing unit 1#2_n of 1523A_1_n" have been explained using Figure 15A1, so the explanation will be omitted.

[0814] In addition, in Figures 16 and 17A1, it is stated that "signal processing unit 1530A_1, control unit 1541A_1" is provided in "TRP_1#1_1 of 1311_1", but this is not limited to this, and "signal processing unit 1530A_1, control unit 1541A_1" may also be provided in "TRP_1#2_n of 1312_n".

[0815] Fig. 17A2 shows an example of the configuration of a system configured with "TRP_2#1_1 of 1321_1," "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2" in Fig. 16. In Fig. 17A2, the same numbers are used for components that operate in the same way as in Fig. 15A2, and some explanations will be omitted.

[0816] "TRP_2#1_1 of 1321_1" includes, for example, the antenna module group 2#1_1 of 1511A_2_1, the signal processing unit 2#1_1 of 1513A_2_1, the signal processing unit 1530A_2, and the control unit 1541A_2.

[0817] "TRP_2#2_1 of 1322_1" includes, for example, the antenna module group 2#2_1 of 1521A_2_1 and the signal processing unit 2#2_1 of 1523A_2_1.

[0818] Therefore, "TRP_2#2_m of 1322_m" includes, for example, antenna module group 2#2_m of 1521A_2_m and signal processing unit 2#2_m of 1523A_2_m, where m is an integer between 1 and Y2.

[0819] The operations of the "control unit 1541A_2," "signal processing unit 1530A_2," "antenna module group 2#1_1 of 1511A_2_1, signal processing unit 2#1_1 of 1513A_2_1," and "antenna module group 2#2_m of 1521A_2_m, signal processing unit 2#2_m of 1523A_2_m" have been explained using Figure 15A2, so the explanation will be omitted.

[0820] In Figures 16 and 17A2, it is stated that "signal processing unit 1530A_2, control unit 1541A_2" is provided in "TRP_2#1_1 of 1321_1", but this is not limited to this, and "signal processing unit 1530A_2, control unit 1541A_2" may also be provided in "TRP_2#2_m of 1322_m".

[0821] As described above, by configuring the system so that the first TRP set receives the transmission signal sent by terminal #1 of 1390_1 and the second TRP set receives the transmission signal sent by terminal #1 of 1390_1, the effect of improving the data reception quality of the first TRP set and the second TRP set can be achieved.

[0822] In addition, terminal #1 of 1390_1 can transmit a transmission signal of the first TRP set and / or the second TRP set, thereby achieving the effects of improving the data transmission efficiency of the system and improving the data reception quality.

[0823] Note that, in Figures 14C and 16, terminal #1 of 1390_1 shows an example of transmitting a transmission signal to two TRP sets, "first TRP set and second TRP set," but terminal #1 of 1390_1 may transmit a transmission signal to one TRP set, or terminal #1 of 1390_1 may transmit a transmission signal to three or more TRP sets.

[0824] Furthermore, the method of configuring a TRP set is not limited to the configurations of Figures 14C and 16, and a TRP set may be configured with one or more TRPs.

[0825] The first "modulated signal" set (modulated signal ♭u of 1403A_u) sent by terminal #1 of 1390_1 to the first TRP set of "TRP_1#1_1 of 1311_1," "TRP_1#2_1 of 1312_1, ..., TRP_1#2_Y1 of 1312_Y1" is called the "modulated signal (group) for the first TRP set."

[0826] The second "modulated signal" set (modulated signal ♭u of 1403A_u) sent by terminal #1 of 1390_1 to the second TRP set of "TRP_2#1_1 of 1321_1," "TRP_2#2_1 of 1322_1, ..., TRP_2#2_Y2 of 1322_Y2" is called the "modulated signal (group) for the second TRP set."

[0827] In this case, when transmitting the "modulated signal (group) for the first TRP set" and the "modulated signal (group) for the second TRP set" using the SDM (Spatial Division Multiplexing) method (e.g., fully overlapping, partially overlapping, etc.), examples of arrangement on the time-frequency axis are shown in Figures 18A1, 18A2, 18A3, and 18A4. In Figures 18A1, 18A2, 18A3, and 18A4, the horizontal axis is time and the vertical axis is frequency.

[0828] SDM Example A-1: ​​Assume that the first "modulation signal" set addressed to the first TRP set, which is the "modulation signal (group) for the first TRP set," exists at frequency AXX1 and time AX1, as shown in Figure 18A1. At this time, the second "modulation signal" set addressed to the second TRP set, which is the "modulation signal (group) for the second TRP set," exists at frequency AXX1 and time AX1, as shown in Figure 18A1.

[0829] SDM Example A-2: Assume that the first set of "modulated signals" addressed to the first TRP set, which are "modulated signals (group) for the first TRP set," exists at frequency AXX1 and time AX1, as shown in Figure 18A1. At this time, the second set of "modulated signals" addressed to the second TRP set, which are "modulated signals (group) for the second TRP set," exists at a part of frequency AXX1 and time AX1, as shown in Figure 18A2.

[0830] SDM Example A-3: Assume that the first "modulation signal" set addressed to the first TRP set, which is the "modulation signal (group) for the first TRP set," exists at frequency AXX1 and time AX1, as shown in Figure 18A1. At this time, the second "modulation signal" set addressed to the second TRP set, which is the "modulation signal (group) for the second TRP set," exists at a part of frequency AXX1 and time AX1, as shown in Figure 18A3.

[0831] SDM Example A-4: Assume that the first "modulation signal" set addressed to the first TRP set, which is the "modulation signal (group) for the first TRP set," exists at frequency AXX1 and time AX1, as shown in Figure 18A1. At this time, the second "modulation signal" set addressed to the second TRP set, which is the "modulation signal (group) for the second TRP set," exists at part of frequency AXX1 and part of time AX1, as shown in Figure 18A4.

[0832] SDM Example A-5: Assume that the first set of "modulated signals" addressed to the first TRP set, which are "modulated signals (group) for the first TRP set," exists at frequency AXX1 and time AX1, as shown in Figure 18A1. At this time, the frequency and time used by the second set of "modulated signals" addressed to the second TRP set, which are "modulated signals (group) for the second TRP set," overlaps with part of frequency AXX1 and / or part of time AX1.

[0833] In addition, the "modulated signal (group) for the first TRP set" and the "modulated signal (group) for the second TRP set" may be transmitted using a TDM (Time Division Multiplexing) method (e.g., tdmScheme, non-overlapping, etc.). Examples of the arrangement on the time-frequency axis in this case are shown in Figures 18B1 and 18B2. In Figures 18B1 and 18B2, the horizontal axis represents time and the vertical axis represents frequency.

[0834] TDM Example A-1: ​​Assume that the first set of "modulated signals" addressed to the first TRP set, which are "modulated signals (group) for the first TRP set," exists at frequency BXX1 and time BX1, as shown in Figure 18B1. At this time, the second set of "modulated signals" addressed to the second TRP set, which are "modulated signals (group) for the second TRP set," exists at frequency BXX1 and time BX2, as shown in Figure 18B1.

[0835] TDM Example A-2: Assume that the first "modulated signal" set addressed to the first TRP set, which is the "modulated signal (group) for the first TRP set," exists at frequency BXX1 and time BX1, as shown in Figure 18B2. At this time, the second "modulated signal" set addressed to the second TRP set, which is the "modulated signal (group) for the second TRP set," exists at part of frequency BXX1 and time BX2, as shown in Figure 18B2.

[0836] The "modulated signal (group) for the first TRP set" and the "modulated signal (group) for the second TRP set" may be transmitted using an FDM (Frequency Division Multiplexing) method (e.g., fdmScheme, non-overlapping, etc.). Examples of the arrangement on the time-frequency axis in this case are shown in Figures 18C1, 18C2, and 18C3. In Figures 18C1, 18C2, and 18C3, the horizontal axis represents time and the vertical axis represents frequency.

[0837] FDM Example A-1: ​​Assume that the first set of "modulated signals" addressed to the first TRP set, which are "modulated signals (group) for the first TRP set," exists at frequency CXX1 and time CX1, as shown in Figure 18C1. At this time, the second set of "modulated signals" addressed to the second TRP set, which are "modulated signals (group) for the second TRP set," exists at frequency CXX2 and time CX1, as shown in Figure 18C1.

[0838] FDM Example A-2: Assume that the first set of "modulated signals" addressed to the first TRP set, which are "modulated signals (group) for the first TRP set," exists at frequency CXX1 and time CX1, as shown in Figure 18C2. At this time, the second set of "modulated signals" addressed to the second TRP set, which are "modulated signals (group) for the second TRP set," exists at frequency CXX2 and part of time CX1, as shown in Figure 18C2.

[0839] FDM Example A-3: Assume that the first set of "modulated signals" addressed to the first TRP set, which are "modulated signals (group) for the first TRP set," exists at frequency CXX1 and time CX1, as shown in Figure 18C3. At this time, the second set of "modulated signals" addressed to the second TRP set, which are "modulated signals (group) for the second TRP set," exists at frequency CXX2 and time CX2, as shown in Figure 18C3.

[0840] FDM Example A-4: Assume that the first set of "modulated signals" addressed to the first TRP set, which are "modulated signals (group) for the first TRP set," exists at frequency CXX1 and time CX1. At this time, the second set of "modulated signals" addressed to the second TRP set, which are "modulated signals (group) for the second TRP set," exists at frequency CXX2 and time CX2.

[0841] By doing so, the effect of improving the data reception quality can be obtained in the TRP that is the communication partner of the terminal, thereby improving the data transmission efficiency of the system.In addition, since the terminal transmits multiple sets of modulated signals and each TRP set can receive the modulated signal set, the effect of improving the data transmission efficiency and improving the data reception quality can be obtained.

[0842] In the above description, the first set of modulated signals for the first TRP set, which is the "modulated signal (group) for the first TRP set," and the second set of modulated signals for the second TRP set, which is the "modulated signal (group) for the second TRP set," may contain the same data. Therefore, repetition may be applied to the first set of modulated signals for the first TRP set, which is the "modulated signal (group) for the first TRP set," and the second set of modulated signals fo...

Claims

1. A wireless communication system comprising a first wireless communication device and a second wireless communication device, wherein the first wireless communication device has N layers (N is an integer equal to or greater than 1) generated from data, a first antenna unit performing a first operation of transmitting A transmission signals (A is an integer equal to or greater than 2) generated from the N layers, and a first control unit controlling the operation of the first antenna unit, and the second wireless communication device has a second antenna unit performing a second operation of transmitting B transmission signals (B is an integer equal to or greater than 1 and less than A) generated from the N layers or M layers (M is an integer equal to or greater than 1 and less than N) that are part of the N layers and include the data or a portion of the data, and a second control unit controlling the operation of the second antenna unit.

2. The wireless communication system according to claim 1, wherein A is 4 and B is 2.

3. The wireless communication system according to claim 1, wherein N is 2.

4. The wireless communication system according to claim 1, wherein the first wireless communication device is provided with a third antenna unit that performs the second operation.

5. The wireless communication system according to claim 1, wherein the first wireless communication device is provided with a plurality of the first antenna units, and the first control unit determines that at least one of the plurality of first antenna units performs the first operation.

6. The wireless communication system according to claim 5, wherein the first control unit determines that at least one of the plurality of first antenna units performs the second operation.

7. The wireless communication system according to claim 6, wherein the second operation is performed by a portion of the first antenna unit that performs the first operation.

8. The wireless communication system according to claim 1, wherein the first antenna unit has a plurality of antenna ports, and the control unit determines an antenna port that performs the first operation from among the plurality of antenna ports, and determines an antenna port that performs the second operation from among the plurality of antenna ports.

9. The wireless communication system according to claim 1, wherein the first antenna unit has a plurality of antenna ports, the plurality of antenna ports being divided into a first group and a second group, and the first control unit determines an antenna port from the first group that will perform the first operation, and determines an antenna port from the second group that will perform the second operation.

10. A wireless communication device comprising: a first antenna unit that performs a first operation of transmitting N layers (N is an integer equal to or greater than 1) generated from data, and A transmission signals (A is an integer equal to or greater than 2) generated from the N layers; a second antenna unit that performs a second operation of transmitting B transmission signals (B is an integer equal to or greater than 1 and less than A) generated from the N layers or M layers (M is an integer equal to or greater than 1 and less than N) that are part of the N layers and include the data or a part of the data; and a control unit that controls the operation of the first antenna unit and the second antenna unit.

11. A communication method, comprising: a first wireless communication device having a first antenna unit, performing a first operation of controlling the first antenna unit to transmit A transmission signals (A is an integer of 2 or more) generated from N layers (N is an integer of 1 or more) generated from data; and a second wireless communication device having a second antenna unit, performing a second operation of controlling the second antenna unit to transmit B transmission signals (B is an integer of 1 or more and less than A) generated from the N layers or M layers (M is an integer of 1 or more and N or less) that are part of the N layers and include the data or a part of the data.

Images