Transmitting system, receiving system, and channel combining system

Abstract

To provide a transmitting system, a receiving system, and a channel combining system that prevent deterioration of transmission quality due to leakage of local signals.SOLUTION: A transmission system includes N transmitters and a channel combiner that combines signals of output from the N transmitters into one output terminal. The channel combiner includes an n-th transmit baseband bandpass filter, an n-th transmit frequency converter connected to the n-th transmit baseband bandpass filter, an n-th transmit local oscillator that supplies a local signal to the n-th transmit frequency converter, an n-th transmit local signal bandpass filter connected to the connection point between the n-th transmit baseband bandpass filter and the n-th transmit frequency converter, an n-th transmit termination resistor having one end connected to the other end of the n-th transmit local signal bandpass filter and the other end terminated, and an n-th transmit radio bandpass filter connected to the n-th transmit frequency converter.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present disclosure relates to a transmission system, a reception system, and a channel synthesis system.

Background Art

[0002] In the sixth-generation mobile communication system (6G) expected to be commercially available around 2030, the realization of high-capacity wireless communication exceeding 100 Gbps is required (Non-Patent Document 1). As an effective method for realizing high-capacity wireless communication, a method of securing a large bandwidth for use in wireless communication can be mentioned. In fact, in 6G, increasing the bandwidth of wireless communication by utilizing the sub-terahertz band exceeding 100 GHz, which has not been actively used in mobile communication systems, has been studied.

[0003] One of the problems in increasing the bandwidth of wireless communication is that it is difficult to expand the baseband (BB) band / intermediate frequency (IF) band. The bands of the BB signal and the IF signal are limited by the bands and sampling rates of the digital-to-analog converter (DAC) and the analog-to-digital converter (ADC) used when generating and receiving these signals.

[0004] When using commercially available DACs and ADCs for wireless communication, the BB band / IF band is at most about 5 GHz. As a result, the band of the sub-terahertz band high-frequency (RF) signal generated by up-converting these BB / IF signals is also at most about 5 GHz. Therefore, for realizing high-capacity wireless using the sub-terahertz band, a technology for expanding the BB band / IF band beyond the current state (hereinafter referred to as a band expansion technology) is important.

[0005] As a conventional bandwidth expansion technique, channel bonding (channel synthesis) is known. The functional configuration of a prior art channel synthesis system 9 is shown in FIG. 1. As shown in the figure, the prior art channel synthesis system 9 includes a transmission system and a reception system. The transmission system includes N (where N is an integer of 2 or more) transmitters (TX) 91-1, …, 91-N, a channel synthesizer 92, and a transmission antenna 93. The reception system includes a reception antenna 94, a channel separator 95, and N receivers (RX) 96-1, …, 96-N. The channel synthesis system 9 is a system that synthesizes a plurality of radio signal bands (channels) and uses an equivalently wide radio signal band.

[0006] In the present disclosure, in accordance with N transmitters (TX) and N receivers (RX), each component with the same name appears N times (except for some components), and branch numbers 1, …, N are assigned to each of them. Since they perform the same operation as long as they have the same name, for each of the N components with the same name, the nth (n = 1, …, N) component with the same name is described as representative. The nth transmitter 91-n and the nth receiver 96-n are assumed to handle channel n (ch.n) as a radio signal.

[0007] The bandwidth of each channel is band-limited to several GHz due to the above-described band-limitation of the DAC and ADC. In the transmission system, the channel synthesizer 92 frequency-converts the signals of N channels (ch.1, …, ch.N) to different center frequencies (f1, f2, …, f N ). The transmission antenna 93 transmits a broadband RF signal having a bandwidth of N channels.

[0008] In the reception system, the reception antenna 94 receives this broadband RF signal. The channel separator 95 separates the RF signal into the original signals of N channels (ch.1, …, ch.N). Each receiver 96-n receives the signal of each channel. By using channel bonding, even if the bandwidth of the channel borne by each of the transmitter TX and the receiver RX is small, the bandwidth of the RF signal used for wireless communication can be increased.

[0009] In order to realize wireless communication using channel bonding, it is important to appropriately design a channel synthesizer 92 and a channel separator 95 to avoid channel interference. This will be described with reference to FIG. 2.

[0010] FIG. 2 is a diagram showing a functional configuration example in which an N:1 synthesizer is used as the channel synthesizer 92 and an N:1 distributor is used as the channel separator 95 in a conventional channel synthesis system 9. As shown in the figure, the channel synthesizer 92 in the transmission system includes an n-th transmission baseband band filter 921-n that passes the n-th (n = 1, …, N) transmission baseband signal, an n-th transmission frequency converter 922-n connected to the n-th transmission baseband band filter 921-n and performing frequency conversion to the n-th transmission center frequency, an n-th transmission local oscillator 923-n that supplies a local signal of the n-th transmission local oscillation frequency to the n-th transmission frequency converter 922-n, an n-th transmission radio band filter 924-n connected to the n-th transmission frequency converter 922-n and passing the n-th transmission radio frequency signal converted to the n-th transmission center frequency, and an N:1 synthesizer 925.

[0011] On the other hand, the channel separator 95 in the reception system includes an N:1 distributor 951, an n-th reception radio band filter 952-n that passes the n-th (n = 1, …, N) reception radio frequency signal, an n-th reception frequency converter 953-n connected to the n-th reception radio band filter 952-n and performing frequency conversion to the n-th reception center frequency, an n-th reception local oscillator 954-n that supplies a local signal of the n-th reception local oscillation frequency to the n-th reception frequency converter 953-n, and an n-th reception baseband band filter 955-n connected to the n-th reception frequency converter 953-n and passing the n-th reception baseband signal.

[0012] In both the transmission system and the reception system, the modulation signal of frequency f B handled by the BB device is used for each channel at frequencies (f B + f1, f B + f2, …, f B + fN ) is frequency-converted by a frequency converter 922-n (mixer) with a local signal of frequency (f1, f2, …, f N ). Generally, since the N:1 synthesizer 925 and the N:1 distributor 951 can be realized as broadband devices, they are suitable for applications such as synthesizing and distributing signals of various bands like channel bonding. Band-pass filters (BPFs) that pass the frequency bands used in each channel are arranged in the transmission system and the reception system.

[0013] However, the conventional channel synthesizer 92 and channel separator 95 have the following problems.

[0014] In the channel synthesizer 92, as shown by the white arrow in FIG. 2, a part of the local signal f n leaks to the input side via the frequency converter 922-n. Usually, the transmission baseband band filter 921-n is designed to pass the transmission baseband signal f B and block the leaked local signal f n . Therefore, the leaked local signal f n is reflected by the transmission baseband band filter 921-n and input to the n-th transmission frequency converter 922-n together with the transmission baseband signal f B . The n-th transmission frequency converter 922-n has the function of converting the transmission baseband signal f B into a transmission signal of f n + f B + f n . At the same time, due to intermodulation, frequency components called distortions such as 2f n - f B and 2f B - f n are generated.

[0015] And these frequencies are f B + f nIn the case where the nth transmission frequency converter 922-n is close to the nth transmission radio band filter 924-n provided on the output side of the nth transmission frequency converter 922-n, the distorted signal cannot be blocked. Also, if the input signal is a band signal, another signal due to intermodulation distortion is multiplexed into the own band, deteriorating the transmission quality.

[0016] For example, as shown in Figure 3, n =3.9GHz, f B = 2.1 GHz, the output of the nth transmission frequency converter 922-n is a 6 GHz signal, but 2f n -f B =7.8-2.1=5.7GHz.

[0017] If the bandwidth of the input signal is 1 GHz, the n-th transmission frequency converter 922-n generates a signal spectrum in the range of 5.5 to 6.5 GHz, and the n-th transmission radio band filter 924-n is designed to pass this band, as shown in Fig. 4. On the other hand, since the distorted signal is generated in the range of 5.2 to 6.2 GHz, the 5.5 to 6.2 GHz component of the distorted signal cannot be blocked by the n-th transmission radio band filter 924-n and is superimposed on the signal band, causing interference and degrading the signal transmission quality.

[0018] The same is true for the channel separator 95. As shown by the white arrow in FIG. 2, the local signal f n Usually, the nth receiving radio band filter 952-n receives the input signal at a frequency f R Through frequency f n Therefore, the leakage local signal f n is reflected by the nth receiving radio band filter 952-n, and the input signal f R The n-th reception frequency converter 953-n receives the input signal f R The local signal f n By f R -f n At the same time, it also converts the input signal f R and local signal fn Mixed modulation is performed by n -f R and 2f R -f n such that distortion occurs. When these frequencies are close to f R -f n the n-th reception baseband band filter 955-n provided on the output side of the n-th reception frequency converter 953-n cannot block them. Also, when the input signal is a band signal, another signal due to intermodulation distortion is multiplexed within its own band, deteriorating the transmission quality.

Prior Art Documents

Non-Patent Documents

[0019]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0020] As described above, in high-speed wireless communication using channel bonding, when bonding channels, a part of the frequency of the local signal leaks to the input side and is input again to the frequency converter due to reflection in the filter for blocking the leaked local signal. Therefore, due to intermodulation between the input signal and the leaked local signal in the frequency converter, a distorted signal is generated and superimposed on the signal band, deteriorating the signal transmission quality.

[0021] Therefore, an object of the present disclosure is to provide a transmission system, a reception system, and a channel synthesis system that prevent deterioration of transmission quality due to a leaked local signal.

Means for Solving the Problem

[0022] The first transmission system of the present disclosure includes N (N is an integer of 2 or more) transmitters and a channel synthesizer that synthesizes the outputs of the N transmitters into one output terminal.

[0023] The channel synthesizer includes an nth (n = 1, …, N) transmission baseband band filter, an nth transmission frequency converter, an nth transmission local oscillator, an nth transmission local signal band filter, an nth transmission termination resistor, and an nth transmission radio band filter.

[0024] The nth transmission baseband band filter passes the nth transmission baseband signal. The nth transmission frequency converter is connected to the nth transmission baseband band filter and performs frequency conversion to the nth transmission center frequency. The nth transmission local oscillator supplies a local signal of the nth transmission local oscillation frequency to the nth transmission frequency converter. The nth transmission local signal band filter is connected to the connection point between the nth transmission baseband band filter and the nth transmission frequency converter and passes the local signal of the nth transmission local oscillation frequency. One end of the nth transmission termination resistor is connected to the other end of the nth transmission local signal band filter, and the other end is terminated. The nth transmission radio band filter is connected to the nth transmission frequency converter and passes the nth transmission radio frequency signal converted to the nth transmission center frequency.

[0025] The first reception system of the present disclosure includes a channel separator for inputting a radio signal including N channels received from space to N receivers.

[0026] The channel separator includes an nth reception radio band filter, an nth reception frequency converter, an nth reception local oscillator, an nth reception local signal band filter, an nth reception termination resistor, and an nth reception baseband band filter.

[0027] The nth receive radio band filter passes the nth receive radio frequency signal. The nth receive frequency converter is connected to the nth receive radio band filter and performs frequency conversion to the nth receive center frequency. The nth receive local oscillator supplies a local signal of the nth receive local oscillation frequency to the nth receive frequency converter. The nth receive local signal band filter is connected to the connection point between the nth receive radio band filter and the nth receive frequency converter and passes the local signal of the nth receive local oscillation frequency. One end of the nth receive termination resistor is connected to the other end of the nth receive local signal band filter, and the other end is terminated. The nth receive baseband band filter is connected to the nth receive frequency converter and passes the nth receive baseband signal.

[0028] The first channel synthesis system of the present disclosure includes the first transmission system of the present disclosure and the first reception system of the present disclosure.

[0029] The second transmission system of the present disclosure further includes N transmitters and a channel synthesizer that synthesizes the outputs of the N transmitters into one output terminal.

[0030] The channel synthesizer includes an nth transmission baseband band filter, an nth transmission isolator, an nth transmission frequency converter, an nth transmission local oscillator, and an nth transmission radio band filter.

[0031] The nth transmission baseband band filter passes the nth transmission baseband signal. The nth transmission isolator is connected to the output side of the nth transmission baseband band filter, outputs the input signal with low loss, and terminates the input signal from the output side. The nth transmission frequency converter is connected to the nth transmission isolator and performs frequency conversion to the nth transmission center frequency. The nth transmission local oscillator supplies a local signal of the nth transmission local oscillation frequency to the nth transmission frequency converter. The nth transmission radio band filter is connected to the nth transmission frequency converter and passes the nth transmission radio frequency signal converted to the nth transmission center frequency.

[0032] The second receiving system of the present disclosure includes a channel separator for inputting a radio signal including N channels received from space to N receivers, and N receivers.

[0033] The channel separator includes an nth receiving radio band filter, an nth receiving isolator, an nth receiving frequency converter, an nth receiving local oscillator, and an nth receiving baseband band filter.

[0034] The nth receiving radio band filter passes the nth (n = 1, …, N) receiving radio frequency signal. The nth receiving isolator is connected to the output side of the nth receiving radio band filter, outputs the input signal with low loss, and terminates the input signal from the output side. The nth receiving frequency converter is connected to the nth receiving isolator and performs frequency conversion to the nth receiving center frequency. The nth receiving local oscillator supplies a local signal of the nth receiving local oscillation frequency to the nth receiving frequency converter. The nth receiving baseband band filter is connected to the nth receiving frequency converter and passes the nth receiving baseband signal.

[0035] The second channel combining system of the present disclosure includes the second transmitting system of the present disclosure and the second receiving system of the present disclosure.

Advantages of the Invention

[0036] According to the transmitting system, receiving system, and channel combining system of the present disclosure, it is possible to prevent deterioration of transmission quality due to a leaked local signal.

Brief Description of the Drawings

[0037]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0038] Hereinafter, embodiments of the present disclosure will be described in detail. Note that components having the same function are denoted by the same reference numerals, and redundant descriptions are omitted.

Examples

[0039] Hereinafter, the channel synthesis system of Example 1 of the present disclosure will be described with reference to FIG. 5. As shown in the figure, the channel synthesis system 1 of this embodiment includes a transmission system and a reception system. The transmission system includes N transmitters (TX) 91-1,..., 91-N, a channel synthesizer 12, and a transmission antenna 93. The reception system includes a reception antenna 94, a channel separator 15, and N receivers (RX) 96-1,..., 96-N. The configurations other than the channel synthesizer 12 and the channel separator 15 are the same as those of the conventional channel synthesis system 9.

[0040] As shown in the figure, the channel synthesizer 12 includes an nth transmission baseband band filter 921-n, an nth transmission frequency converter 922-n, an nth transmission local oscillator 923-n, an nth transmission local signal band filter 101-n, an nth transmission termination resistor 102-n, an nth transmission radio band filter 924-n, and an N:1 synthesizer 925.

[0041] The configuration other than the n-th transmission local signal band filter 101-n and the n-th transmission termination resistor 102-n is the same as that of the conventional channel synthesizer 92.

[0042] Also, as shown in the figure, the channel separator 15 includes an N:1 distributor 951, the n-th reception radio band filter 952-n, the n-th reception frequency converter 953-n, the n-th reception local oscillator 954-n, the n-th reception local signal band filter 103-n, the n-th reception termination resistor 104-n, and the n-th reception baseband band filter 955-n.

[0043] The configuration other than the n-th reception local signal band filter 103-n and the n-th reception termination resistor 104-n is the same as that of the conventional channel separator 95.

[0044] In the transmission system of this embodiment, the n-th transmission local signal band filter 101-n is connected to the connection point between the n-th transmission baseband band filter 921-n and the n-th transmission frequency converter 922-n, and passes the local signal of the n-th transmission local oscillation frequency. One end of the n-th transmission termination resistor 102-n is connected to the other end of the n-th transmission local signal band filter 101-n, and the other end is terminated.

[0045] In the reception system of this embodiment, the n-th reception local signal band filter 103-n is connected to the connection point between the n-th reception radio band filter 952-n and the n-th reception frequency converter 953-n, and passes the local signal of the n-th reception local oscillation frequency. One end of the n-th reception termination resistor 104-n is connected to the other end of the n-th reception local signal band filter 103-n, and the other end is terminated.

[0046] The reason for configuring the channel synthesis system 1 of this embodiment as described above is to absorb the local signal leaking to the input sides of the channel synthesizer 12 and the channel separator 15. In the channel synthesizer 12, one end of the n-th transmission local signal band filter 101-n is connected in parallel to the input side of the n-th transmission frequency converter 922-n, and the other end is terminated via the n-th transmission termination resistor 102-n. The n-th transmission local signal band filter 101-n is designed to pass f n and block f B . By doing so, the leakage local signal f n passes through the n-th transmission local signal band filter 101-n and is absorbed by the n-th transmission termination resistor 102-n. As a result, only the input signal f B is input to the n-th transmission frequency converter 922-n, so distortion does not occur in the n-th transmission frequency converter 922-n.

[0047] The same applies to the channel separator 15. One end of the n-th reception local signal band filter 103-n is connected in parallel to the input side of the n-th reception frequency converter 953-n, and the other end is terminated via the n-th reception termination resistor 104-n. The n-th reception local signal band filter 103-n is designed to pass f n and block f R . By doing so, the leakage local signal f n passes through the n-th reception local signal band filter 103-n and is absorbed by the n-th reception termination resistor 104-n. As a result, only the input signal f R is input to the n-th reception frequency converter 953-n, so distortion does not occur in the n-th reception frequency converter 953-n.

Example

[0048] Hereinafter, the channel synthesis system according to Embodiment 2 of the present disclosure will be described with reference to FIG. 6. As shown in the figure, the channel synthesis system 2 of this embodiment includes a transmission system and a reception system. The transmission system includes N transmitters (TX) 91-1, …, 91-N, a channel synthesizer 22, and a transmission antenna 93. The reception system includes a reception antenna 94, a channel separator 25, and N receivers (RX) 96-1, …, 96-N. The configurations other than the channel synthesizer 22 and the channel separator 25 are the same as those of the conventional channel synthesis system 9.

[0049] As shown in the figure, the channel synthesizer 22 includes an n-th transmission baseband band filter 921-n, an n-th transmission isolator 201-n, an n-th transmission frequency converter 922-n, an n-th transmission local oscillator 923-n, an n-th transmission radio band filter 924-n, and an N:1 synthesizer 925.

[0050] The configurations other than the n-th transmission isolator 201-n are the same as those of the conventional channel synthesizer 92.

[0051] Also, as shown in the figure, the channel separator 25 includes an N:1 distributor 951, an n-th reception radio band filter 952-n, an n-th reception isolator 202-n, an n-th reception frequency converter 953-n, an n-th reception local oscillator 954-n, and an n-th reception baseband band filter 955-n.

[0052] The configurations other than the n-th reception isolator 202-n are the same as those of the conventional channel separator 95.

[0053] In the transmission system of this embodiment, the n-th transmission isolator 201-n is connected to the output side of the n-th transmission baseband band filter 921-n, outputs the input signal with low loss, and terminates the input signal from the output side.

[0054] In the reception system of this embodiment, the n-th reception isolator 202-n is connected to the output side of the n-th reception radio band filter 952-n, outputs the input signal with low loss, and terminates the input signal from the output side.

[0055] The reason for configuring the channel synthesis system 2 of this embodiment as described above is the same as that of the first embodiment, which is to absorb the local signal leaking to the input sides of the channel synthesizer 22 and the channel separator 25. An isolator generally has the ability to output the signal input from the input side with low loss in the operating band and block the signal input from the output side.

[0056] In the channel synthesizer 22, when the operating band of the n-th transmission isolator 201-n includes f B and f n as shown in the figure, the n-th transmission isolator 201-n is connected between the n-th transmission baseband band filter 921-n and the n-th transmission frequency converter 922-n. If the connection end with the n-th transmission baseband band filter 921-n is set as the input and the connection end with the n-th transmission frequency converter 922-n is set as the output, the leakage local signal f n is absorbed by the n-th transmission isolator 201-n. As a result, only the input signal f B is input to the n-th transmission frequency converter 922-n, so distortion does not occur in the n-th transmission frequency converter 922-n.

[0057] The same applies to the channel separator 25. As shown in the figure, the n-th reception isolator 202-n is connected between the n-th reception radio band filter 952-n and the n-th reception frequency converter 953-n. If the connection end with the n-th reception radio band filter 952-n is set as the input and the connection end with the n-th reception frequency converter 953-n is set as the output, the leakage local signal f n is absorbed by the n-th reception isolator 202-n. As a result, only the input signal f B is input to the n-th reception frequency converter 953-n, so distortion does not occur in the n-th reception frequency converter 953-n.

[0058] <Hardware Configuration> Note that the block diagrams used in the description of the above embodiments show blocks of functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically combined device, or two or more physically or logically separated devices may be directly or indirectly (e.g., using wired, wireless, etc.) connected and realized using these multiple devices. The functional block may be realized by combining software with the above one device or the above multiple devices.

[0059] Functions include, but are not limited to, judgment, decision, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection determination, establishment, comparison, assumption, expectation, regarded as, notification (broadcasting), notification (notifying), communication, forwarding, configuration, reconfiguration, allocation (allocating, mapping), assignment, etc. For example, a functional block (component) that functions as transmission is called a transmission unit or a transmitter. In any case, as described above, the realization method is not particularly limited.

[0060] For example, a base station, a user terminal, etc. related to an embodiment of the present disclosure may function as a computer that performs the processing of the wireless communication method of the present disclosure. FIG. 7 is a diagram showing an example of the hardware configuration of a base station and a user terminal (denoted as base station 10 and user terminal 20 in the figure, the same applies hereinafter) related to an embodiment of the present disclosure. The above-described base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0061] In the following description, the term "device" can be read as a circuit, a device, a unit, etc. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured without including some of the devices.

[0062] Each function in the base station 10 and the user terminal 20 is realized by loading a predetermined software (program) onto hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs calculations and controls the communication by the communication device 1004, or controls at least one of reading and writing data in the memory 1002 and the storage 1003.

[0063] The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be constituted by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, etc. For example, a baseband signal processing unit, a call processing unit, etc. may be realized by the processor 1001.

[0064] Further, the processor 1001 reads a program (program code), software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program for causing a computer to execute at least a part of the operations described in the above embodiments is used. For example, the control unit of the user terminal 20 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and the same may be true for other functional blocks. Although it has been described that the above various processes are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunication line.

[0065] The memory 1002 is a computer-readable recording medium and may be constituted by at least one of, for example, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The memory 1002 may be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 can store a program (program code), software module, etc. executable for implementing the wireless communication method according to an embodiment of the present disclosure.

[0066] Storage 1003 is a computer-readable recording medium and may be composed of, for example, at least one of an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disc, a digital versatile disc, a Blu-ray (registered trademark) disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc. Storage 1003 may also be referred to as an auxiliary storage device. The above-described storage medium may be, for example, a database including at least one of the memory 1002 and the storage 1003, a server, or other appropriate media.

[0067] The communication device 1004 is hardware (a transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to implement at least one of frequency-division duplexing (FDD: Frequency Division Duplex) and time-division duplexing (TDD: Time Division Duplex). For example, the above-described transmission / reception antenna, amplifier section, transmission / reception section, transmission line interface, etc. may be realized by the communication device 1004. The transmission / reception section may be physically or logically separated into a transmission section and a reception section.

[0068] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an external input. The output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that performs an output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (e.g., a touch panel).

[0069] Also, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or may be configured using different buses for each device.

[0070] Also, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0071] <Notification of Information, Signaling> The notification of information is not limited to the aspects / embodiments described in the present disclosure and may be performed using other methods. For example, the notification of information may be implemented by physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI)), upper layer signaling (e.g., radio resource control (RRC) signaling, medium access control (MAC) signaling, notification information (master information block (MIB), system information block (SIB))), other signals, or a combination thereof. Also, the RRC signaling may be referred to as an RRC message and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.

[0072] <Applicable System> Each aspect / embodiment described in the present disclosure may be applied to at least one of systems using LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (x is, for example, an integer or a decimal), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other suitable systems, and next-generation systems extended, modified, created, and defined based on these. Further, a plurality of systems may be combined and applied (for example, a combination of at least one of LTE and LTE-A and 5G, etc.).

[0073] <Processing procedures, etc.> The processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be reordered as long as there is no contradiction. For example, for the methods described in the present disclosure, the elements of various steps are presented using an exemplary order and are not limited to the specific order presented.

[0074] <Operation of base station> The specific operations assumed to be performed by the base station in the present disclosure may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal can be performed by at least one of the base station and other network nodes other than the base station (for example, but not limited to, MME or S-GW, etc.). Although the case where there is one other network node other than the base station has been exemplified above, a combination of a plurality of other network nodes (for example, MME and S-GW) may also be possible.

[0075] <Input / output direction> Information etc. (see the item of "information, signal") can be output from the upper layer (or lower layer) to the lower layer (or upper layer). It may be input / output via a plurality of network nodes.

[0076] <Handling of input / output information etc.> The input / output information etc. may be stored in a specific location (for example, memory), or may be managed using a management table. The input / output information etc. can be overwritten, updated, or appended. The output information etc. may be deleted. The input information etc. may be transmitted to other devices.

[0077] <Determination method> The determination may be made by a value represented by 1 bit (0 or 1), or may be made by a Boolean value (true or false), or may be made by a numerical comparison (for example, comparison with a predetermined value).

[0078] <Variations of aspects etc.> Each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched and used during execution. Also, the notification of predetermined information (for example, the notification of "being X") is not limited to being explicitly performed, and may be performed implicitly (for example, by not performing the notification of the predetermined information).

[0079] As described above in detail about the present disclosure, it is obvious to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as modified and changed aspects without departing from the spirit and scope of the present disclosure determined by the description of the claims. Therefore, the description of the present disclosure is for the purpose of illustrative explanation and has no restrictive meaning for the present disclosure.

[0080] <Meaning and Interpretation of Terms> [Software] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc., whether called software, firmware, middleware, microcode, a hardware description language, or by another name.

[0081] Also, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, when software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cables, optical fiber cables, twisted pairs, digital subscriber lines (DSL)) and wireless technologies (such as infrared rays, microwaves), at least one of these wired technologies and wireless technologies is included within the definition of the transmission medium.

[0082] [Information, Signal] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be referred to throughout the above description, may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0083] In addition, for the terms described in this disclosure and the terms necessary for understanding this disclosure, they may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Also, a signal may be a message. Also, a component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0084] [System, Network] The terms "system" and "network" used in this disclosure are used interchangeably.

[0085] [Parameter, Channel and Their Names] Also, the information, parameters, etc. described in this disclosure may be represented using absolute values, relative values from a predetermined value, or using corresponding other information. For example, a radio resource may be indicated by an index.

[0086] The names used for the above-described parameters are not limiting names in any way. Furthermore, mathematical formulas, etc. using these parameters may be different from those explicitly disclosed in this disclosure. Since various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, the various names assigned to these various channels and information elements are not limiting names in any way.

[0087] [Base Station] In the present disclosure, terms such as "base station (BS)", "radio base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. The base station may also be referred to by terms such as macro cell, small cell, femto cell, pico cell, etc.

[0088] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each of the smaller areas can also provide communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides communication services in this coverage.

[0089] In the present disclosure, the base station transmitting information to the terminal may also be construed as the base station instructing the terminal to perform control / operations based on the information.

[0090] [Mobile Station] In the present disclosure, terms such as "mobile station (MS)", "user terminal", "user equipment (UE)", "terminal", etc. may be used interchangeably.

[0091] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

[0092] [Base Station / Mobile Station] At least one of the base station and the mobile station may also be referred to as a transmission device, a reception device, a communication device, etc. Note that at least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body refers to a movable object, and the moving speed is arbitrary. Also, the case where the moving body is stopped is of course included. The moving body includes, for example, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, limousines, rickshaws, ships (ship and other watercraft), airplanes, rockets, artificial satellites, drones (registered trademark), multicopters, quadcopters, balloons, and things mounted on these, and is not limited thereto. Further, the moving body may be a moving body that autonomously travels based on an operation command. It may be a vehicle (e.g., a car, an airplane, etc.), a moving body that moves without a driver (e.g., a drone, an autonomous driving vehicle, etc.), or a robot (humanoid or non-humanoid). Note that at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0093] In addition, the base station in the present disclosure may be replaced by a user terminal. For example, for a configuration in which communication between the base station and the user terminal is replaced with communication between a plurality of user terminals (which may be referred to as, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.), each aspect / embodiment of the present disclosure may be applied. In this case, the functions of the above-described base station 10 may be configured to be functions of the user terminal 20. Further, terms such as "uplink" and "downlink" may be replaced with terms corresponding to inter-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may be replaced with a side channel.

[0094] Similarly, the user terminal in the present disclosure may be replaced by a base station. In this case, the functions of the above-described user terminal 20 may be configured to be functions of the base station 10.

[0095] Fig. 8 shows a configuration example of the vehicle 61. As shown in Fig. 8, the vehicle 61 includes a drive unit 62, a steering unit 63, an accelerator pedal 64, a brake pedal 65, a shift lever 66, left and right front wheels 67, left and right rear wheels 68, an axle 69, an electronic control unit 610, various sensors 621 to 629, an information service unit 612, and a communication module 613.

[0096] The drive unit 62 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering unit 63 includes at least a steering wheel (also called a handwheel), and is configured to steer at least one of the front wheels and the rear wheels based on an operation of the steering wheel operated by the user.

[0097] The electronic control unit 610 is composed of a microprocessor 631, a memory (ROM, RAM) 632, and a communication port (IO port) 633. Signals from various sensors 621 to 627 provided in the vehicle are input to the electronic control unit 610. The electronic control unit 610 may also be called an ECU (Electronic Control Unit).

[0098] Examples of signals from various sensors 621 to 628 include a current signal from a current sensor 621 that senses the current of a motor, a rotational speed signal of a front wheel or a rear wheel obtained by a rotational speed sensor 622, an air pressure signal of a front wheel or a rear wheel obtained by an air pressure sensor 623, a vehicle speed signal obtained by a vehicle speed sensor 624, an acceleration signal obtained by an acceleration sensor 625, a depression amount signal of an accelerator pedal obtained by an accelerator pedal sensor 629, a depression amount signal of a brake pedal obtained by a brake pedal sensor 626, an operation signal of a shift lever obtained by a shift lever sensor 627, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 628.

[0099] The information service unit 612 is composed of various devices for providing (outputting) various information such as driving information, traffic information, and entertainment information, such as a car navigation system, an audio system, a speaker, a television, and a radio, and one or more ECUs for controlling these devices. The information service unit 612 provides various multimedia information and multimedia services to the passengers of the vehicle 61 by using the information obtained from an external device via a communication module 613 or the like.

[0100] The information service unit 612 may include an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) for receiving an external input, or may include an output device (for example, a display, a speaker, an LED lamp, a touch panel, etc.) for performing an external output.

[0101] The driving assistance system unit 630 is composed of various devices for providing functions to prevent accidents and reduce the driver's driving load, such as a millimeter-wave radar, LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., a high-definition (HD) map, an autonomous vehicle (AV) map, etc.), a gyro system (e.g., an IMU (Inertial Measurement Unit), an INS (Inertial Navigation System), etc.), an AI (Artificial Intelligence) chip, an AI processor, and one or more ECUs for controlling these devices. Also, the driving assistance system unit 630 transmits and receives various information via the communication module 613 to realize a driving assistance function or an autonomous driving function.

[0102] The communication module 613 can communicate with the microprocessor 631 and the components of the vehicle 61 via a communication port. For example, the communication module 613 transmits and receives data with the drive unit 62, the steering unit 63, the accelerator pedal 64, the brake pedal 65, the shift lever 66, the left and right front wheels 67, the left and right rear wheels 68, the axle 69, the microprocessor 631 and the memory (ROM, RAM) 632 in the electronic control unit 610, and the sensors 621 to 628 provided in the vehicle 61 via the communication port 633.

[0103] The communication module 613 is a communication device that can be controlled by the microprocessor 631 of the electronic control unit 610 and can communicate with an external device. For example, it transmits and receives various information via wireless communication with an external device. The communication module 613 may be either inside or outside the electronic control unit 610. The external device may be, for example, a base station, a mobile station, etc.

[0104] The communication module 613 transmits the current signal from the current sensor input to the electronic control unit 610 to an external device via wireless communication. Also, the communication module 613 transmits, via wireless communication to an external device, the rotational speed signals of the front and rear wheels acquired by the rotational speed sensor 622, the air pressure signals of the front and rear wheels acquired by the air pressure sensor 623, the vehicle speed signal acquired by the vehicle speed sensor 624, the acceleration signal acquired by the acceleration sensor 625, the depression amount signal of the accelerator pedal acquired by the accelerator pedal sensor 629, the depression amount signal of the brake pedal acquired by the brake pedal sensor 626, the operation signal of the shift lever acquired by the shift lever sensor 627, and the detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by the object detection sensor 628, etc., which are input to the electronic control unit 610. The communication module 613 may transmit at least one of the signals from the various sensors 621 - 628 input to the electronic control unit 610, the information obtained based on the signals, and the information based on the input from the external (user) obtained via the information service unit 612 to an external device via wireless communication. The electronic control unit 610, the various sensors 621 - 628, the information service unit 612, etc. may be referred to as an input unit that receives inputs. For example, the PUSCH transmitted by the communication module 613 may include information based on the above inputs. The communication module 613 receives various information (traffic information, signal information, inter - vehicle information, etc.) transmitted from an external device and displays it to the information service unit 612 provided in the vehicle. The information service unit 612 may be referred to as an output unit that outputs information (for example, outputs information to devices such as a display and a speaker based on the PDSCH received by the communication module 613 (or the data / information decoded from the PDSCH)).

[0105] In addition, the communication module 613 stores various information received from an external device into the memory 632 that can be utilized by the microprocessor 631. Based on the information stored in the memory 632, the microprocessor 631 may control the drive unit 62, steering unit 63, accelerator pedal 64, brake pedal 65, shift lever 66, left and right front wheels 67, left and right rear wheels 68, axle 69, sensors 621 to 628, etc. provided in the vehicle 61.

[0106] 61 Vehicle, 62 Drive unit, 63 Steering unit, 64 Accelerator pedal, 65 Brake pedal, 66 Shift lever, 67 Left and right front wheels, 68 Left and right rear wheels, 69 Axle, 610 Electronic control unit, 612 Information service unit, 613 Communication module, 621 to 628 Various sensors, 621 Current sensor, 622 Rotation speed sensor, 623 Air pressure sensor, 624 Vehicle speed sensor, 625 Acceleration sensor, 626 Brake pedal sensor, 627 Shift lever sensor, 628 Object detection sensor, 629 Accelerator pedal sensor, 630 Driving assistance system unit, 631 Microprocessor, 632 Memory (ROM, RAM), 633 Communication port (IO port) [Judgment, decision] As used in this disclosure, the terms "determining" and "deciding" may encompass a wide variety of actions. "Determining" and "deciding" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up (e.g., searching in a table, database, or other data structure), and ascertaining that something has been "determined" or "decided". "Determining" and "deciding" may also include considering something received (e.g., receiving information), transmitted (e.g., transmitting information), input, output, or accessed (e.g., accessing data in memory) as having been "determined" or "decided". Additionally, "determining" and "deciding" may include considering something resolved, selected, chosen, established, or compared as having been "determined" or "decided". That is, "determining" and "deciding" may include considering that some action has been "determined" or "decided". Also, "determining (deciding)" may be read as "assuming", "expecting", "considering", etc.As used herein, the term "determining" may encompass a wide variety of actions. For example, "determining" may be regarded as judging, calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure), ascertaining and the like. Also, "determining" may be regarded as receiving (e.g., receiving information), transmitting (e.g., transmitting information), inputting, outputting, accessing (e.g., accessing data in a memory) and the like. Also, "determining" may be regarded as resolving, selecting, choosing, establishing and the like. That is, “determining” may be regarded as a certain type of action related to determining.。 [Connected, combined] The terms "connected" and "coupled," or any variations thereof, mean any direct or indirect connection or coupling between two or more elements, and can include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements can be physical, logical, or a combination thereof. For example, "connected" may be read as "accessed." As used in this disclosure, two elements can be considered to be "connected" or "coupled" to each other using at least one of one or more wires, cables, and printed electrical connections, as well as, by way of some non-limiting and non-inclusive examples, electromagnetic energy having wavelengths in the radio frequency region, microwave region, and optical (both visible and invisible) region.

[0107] [based on] As used in this disclosure, the recitation "based on" does not mean "based solely on" unless otherwise specified. In other words, the recitation "based on" means both "based solely on" and "based at least in part on."

[0108] [first, second] Any reference to an element using the designations "first," "second," etc. as used in this disclosure does not generally limit the amount or order of those elements. These designations can be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, a reference to a first and second element does not mean that only two elements can be employed, or that the first element must precede the second element in any way.

[0109] [open format] In the present disclosure, when the terms "include", "including" and their variants are used, these terms are intended to be inclusive, similar to the term "comprising". Further, the term "or" used in the present disclosure is not intended to be an exclusive disjunction.

[0110] [Time units such as TTI, frequency units such as RB, radio frame configuration] A radio frame may be composed of one or more frames in the time domain.

[0111] Each of the one or more frames in the time domain may be referred to as a subframe.

[0112] A subframe may further be composed of one or more slots in the time domain. The subframe may have a fixed time length (e.g., 1 ms) that does not depend on numerology.

[0113] Numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology may indicate, for example, at least one of subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processing performed by a transceiver in the frequency domain, specific windowing processing performed by a transceiver in the time domain, etc.

[0114] A slot may be composed of one or more symbols (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A slot may be a time unit based on a new numerology.

[0115] A slot may include a plurality of mini-slots. Each mini-slot may be composed of one or more symbols in the time domain. Also, a mini-slot may be called a sub-slot. A mini-slot may be composed of a smaller number of symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot may be called a PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may be called a PDSCH (or PUSCH) mapping type B.

[0116] A radio frame, a sub-frame, a slot, a mini-slot, and a symbol all represent time units for signal transmission. Different names corresponding to each of them may be used.

[0117] For example, one sub-frame may be called a transmission time interval (TTI), a plurality of consecutive sub-frames may be called a TTI, or one slot or one mini-slot may be called a TTI. That is, at least one of the sub-frame and the TTI may be a sub-frame (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1 - 13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, a mini-slot, etc. instead of a sub-frame.

[0118] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in an LTE system, the base station performs scheduling to allocate radio resources (such as the frequency bandwidth and transmission power that can be used at each user terminal) to each user terminal in units of TTI. Note that the definition of TTI is not limited to this.

[0119] TTI may be a transmission time unit such as a channel - encoded data packet (transport block), code block, codeword, etc., or may be a processing unit such as scheduling and link adaptation. Note that when TTI is given, the time interval (e.g., the number of symbols) in which a transport block, code block, codeword, etc. are actually mapped may be shorter than the TTI.

[0120] Note that when one slot or one mini - slot is called TTI, one or more TTIs (i.e., one or more slots or one or more mini - slots) may be the minimum time unit for scheduling. Also, the number of slots (mini - slot numbers) constituting the minimum time unit for the scheduling may be controlled.

[0121] A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel.8 - 12), normal TTI, long TTI, normal sub - frame, normal sub - frame, long sub - frame, slot, etc. A TTI shorter than the normal TTI may be called a shortened TTI, short TTI, partial TTI (partial or fractional TTI), shortened sub - frame, short sub - frame, mini - slot, sub - slot, slot, etc.

[0122] Note that a long TTI (e.g., a normal TTI, sub - frame, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be read as a TTI having a TTI length less than that of the long TTI and not less than 1 ms.

[0123] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and in the frequency domain, it may include one or more consecutive subcarriers. The number of subcarriers included in an RB may be the same regardless of the numerology, for example, it may be 12. The number of subcarriers included in an RB may be determined based on the numerology.

[0124] Also, the time domain of an RB may include one or more symbols, and may be the length of 1 slot, 1 mini-slot, 1 sub-frame, or 1 TTI. 1 TTI, 1 sub-frame, etc. may each be composed of one or more resource blocks.

[0125] Note that one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0126] Also, a resource block may be composed of one or more resource elements (REs). For example, 1 RE may be a radio resource area of 1 subcarrier and 1 symbol.

[0127] A bandwidth part (BWP) (which may also be called a partial bandwidth, etc.) may represent a subset of consecutive common resource blocks (RBs) for a certain numerology in a certain carrier. Here, the common RB may be specified by the index of the RB based on the common reference point of the carrier. A PRB is defined in a certain BWP and may be numbered within that BWP.

[0128] The BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0129] At least one of the configured BWPs may be active, and the UE may not be assumed to transmit and receive a predetermined signal / channel outside the active BWP. Note that in the present disclosure, terms such as "cell", "carrier", etc. may be read as "BWP".

[0130] The structures such as the radio frames, subframes, slots, minislots, and symbols described above are merely illustrative. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols within a TTI, symbol length, cyclic prefix (CP) length, etc. can be changed in various ways.

[0131] [Article] In the present disclosure, for example, when an article is added by translation, such as a, an, and the in English, the present disclosure may include that the noun following these articles is in the plural form.

[0132] [Different] In the present disclosure, the term "A and B are different" may mean that "A and B are different from each other". Note that the term may also mean that "A and B are each different from C". Terms such as "separate", "coupled", etc. may also be interpreted in the same way as "different".

Claims

1. A transmission system including N (N is an integer of 2 or more) transmitters and a channel synthesizer that synthesizes the outputs of the N transmitters into one output terminal, wherein the channel synthesizer a first n (n = 1,..., N) transmission baseband filter for passing the transmission baseband signal, a first n transmission frequency converter connected to the transmission baseband filter and performing frequency conversion to the first n transmission center frequencies, a first n transmission local oscillator that supplies a local signal of the first n transmission local oscillation frequency to the first n transmission frequency converter, a first n transmission local signal band filter connected to the connection point between the first n transmission baseband filter and the first n transmission frequency converter and passing the local signal of the first n transmission local oscillation frequency, a first n transmission termination resistor having one end connected to the other end of the first n transmission local signal band filter and the other end terminated, and a first n transmission radio band filter connected to the first n transmission frequency converter and passing the first n transmission radio frequency signal converted to the first n transmission center frequency transmission system.

2. A channel separator for inputting a radio signal including N (N is an integer of 2 or more) channels received from space to N receivers, and a receiving system including the N receivers, wherein the channel separator a first n (n = 1,..., N) receiving radio band filter for passing the receiving radio frequency signal, a first n receiving frequency converter connected to the receiving radio band filter and performing frequency conversion to the first n receiving center frequencies, a first n receiving local oscillator that supplies a local signal of the first n receiving local oscillation frequency to the first n receiving frequency converter, a first n receiving local signal band filter connected to the connection point between the first n receiving radio band filter and the first n receiving frequency converter and passing the local signal of the first n receiving local oscillation frequency, a first n receiving termination resistor having one end connected to the other end of the first n receiving local signal band filter and the other end terminated, and a first n receiving baseband filter connected to the first n receiving frequency converter and passing the first n receiving baseband signal receiving system.

3. A channel synthesis system including the transmission system according to claim 1 and the receiving system according to claim 2.

4. A transmission system including N (N is an integer of 2 or more) transmitters and a channel synthesizer that synthesizes the outputs of the N transmitters into one output terminal, wherein the channel synthesizer includes: a first n (n = 1,..., N) transmission baseband filter that passes the n-th transmission baseband signal; a first n transmission isolator connected to the output side of the first n transmission baseband filter, which outputs an input signal with low loss and terminates the input signal from the output side; a first n transmission frequency converter connected to the first n transmission isolator, which performs frequency conversion to the first n transmission center frequency; a first n transmission local oscillator that supplies a local signal of the first n transmission local oscillation frequency to the first n transmission frequency converter; and a first n transmission radio band filter connected to the first n transmission frequency converter and passing the first n transmission radio frequency signal converted to the first n transmission center frequency. Transmission system.

5. A channel separator for inputting a radio signal including N (N is an integer of 2 or more) channels received from space to N receivers, and a receiving system including the N receivers, wherein the channel separator includes: a first n receiving radio band filter that passes the first n receiving radio frequency signal; a first n receiving isolator connected to the output side of the first n receiving radio band filter, which outputs an input signal with low loss and terminates the input signal from the output side; a first n receiving frequency converter connected to the first n receiving isolator, which performs frequency conversion to the first n receiving center frequency; a first n receiving local oscillator that supplies a local signal of the first n receiving local oscillation frequency to the first n receiving frequency converter; and a first n receiving baseband filter connected to the first n receiving frequency converter and passing the first n receiving baseband signal. Receiving system.

6. A channel synthesis system including the transmission system according to claim 4 and the receiving system according to claim 5.

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