Electronic device and method for amplifying transmission signal in TDD scheme

Abstract

The electronic device may include a processor, a power amplifier, a crest factor reduction (CFR) module, a digital pre-distortion (DPD) module, and a power source configured to supply power to the power amplifier. The processor may be configured to: transmit a first radio frequency (RF) signal in a first transmit section of a time division duplex (TDD) scheme based on a first state of each of the CFR module, the DPD module, and the power supply, the first RF signal being generated from a first baseband signal; identifying voltage information of a second RF signal associated with a second transmit section following the first transmit section; changing a state of each of the CFR, the DPD, and the power supply from a first state to a second state based on the voltage information in a first reception section between the first transmission section and the second transmission section; and transmitting a second RF signal generated from the second baseband signal in a second transmission section based on a second state of each of the CFR module, the DPD module, and the power supply.

Description

Technical Field

[0001] The present disclosure relates to an electronic device and method for amplifying a transmitted signal in a time division duplex (TDD) scheme. Background Art

[0002] To transmit an output signal in a radio frequency (RF) band, an electronic device may include a power amplifier. The electronic device may generate a baseband signal and an RF signal carried on the RF band. The electronic device may transmit the generated RF signal to an external electronic device by amplifying the generated RF signal via the power amplifier. The electronic device may also include a power source for supplying power to the power amplifier that amplifies the RF signal. Summary of the Invention

[0003] Technical Solution

[0004] According to an aspect of the present disclosure, an electronic device may include: a processor; a power amplifier; a power source configured to supply power to the power amplifier; a crest factor reduction (CFR) module; and a digital predistortion (DPD) module, wherein the processor is configured to: transmit a first radio frequency (RF) signal in a first transmission interval based on a first state of each of the CFR module, the DPD module, and the power source, the first RF signal being generated from a first baseband signal; identify voltage information of a second RF signal associated with a second transmission interval after the first transmission interval; change a state of each of the CFR module, the DPD module, and the power source from the first state to a second state based on the voltage information in a first reception interval between the first transmission interval and the second transmission interval; and transmit a second RF signal generated from a second baseband signal in the second transmission interval based on a second state of each of the CFR module, the DPD module, and the power source.

[0005] The processor may also be configured to: identify a control signal for changing from the first state to the second state; and change the state of the CFR module, the state of the DPD module, and the state of the power source based on the control signal. The control signal may include: information about a voltage corresponding to a maximum average power of the first RF signal and a voltage corresponding to a maximum average power of the second RF signal, and length information of the second transmission interval.

[0006] The processor may also be configured to: identify first scheduling information for transmitting the first RF signal, and identify second scheduling information for transmitting the second RF signal. The maximum average power of the first RF signal may be identified based on the first scheduling information. The maximum average power of the second RF signal may be identified based on the second scheduling information.

[0007] The electronic device may include a digital unit (DU) and a radio unit (RU). The DU may be configured to provide a control signal to the RU.

[0008] The processor may also be configured to: identify first in-phase / quadrature (I / Q) data in a first baseband signal and identify second I / Q data in a second baseband signal. The maximum average power of the first RF signal may be identified based on the first I / Q data. The maximum average power of the second RF signal may be identified based on the second I / Q data.

[0009] The processor may also be configured to: identify another voltage information of a third RF signal associated with a third transmission interval after a second transmission interval, and based on the another voltage information of the third RF signal, change the state of each of the CFR module, the DPD module, and the power supply from a second state to a third state in a second reception interval between the second transmission interval and the third transmission interval, and transmit the third RF signal in the third transmission interval based on the third state of each of the CFR module, the DPD module, and the power supply. The third RF signal may be generated from a third baseband signal. The lengths of the first reception interval and the second transmission interval may be different from the lengths of the second reception interval and the third transmission interval.

[0010] The processor may also be configured to: set a threshold of the CFR module in a first state to a first value; and set a threshold of the CFR module in a second state to a second value based on the voltage information of the second RF signal.

[0011] The DPD module may include a plurality of look-up tables (LUTs). The processor may also be configured to: set the LUT of the DPD module in a first state to a first LUT among the plurality of LUTs, and set the LUT of the DPD module in a second state to a second LUT among the plurality of LUTs based on the voltage information of the second RF signal.

[0012] The processor may also be configured to: set a direct current supplied by the power supply in a first state to a first voltage, and set a direct current supplied by the power supply in a second state to a second voltage based on the voltage information of the second RF signal.

[0013] The processor may also be configured to: transmit the first RF signal by amplification using a power amplifier corresponding to the first state, and transmit the second RF signal by amplification using a power amplifier corresponding to the second state.

[0014] According to one aspect of the present disclosure, a method performed by an electronic device includes: transmitting a first radio frequency (RF) signal in a first transmission interval based on a first state of each of a crest factor reduction (CFR) module, a digital predistortion (DPD) module, and a power supply for a power amplifier in the electronic device, the first RF signal being generated from a first baseband signal; identifying voltage information of a second RF signal associated with a second transmission interval after the first transmission interval; changing a state of each of the CFR module, the DPD module, and the power supply from the first state to a second state based on the voltage information in a first reception interval between the first transmission interval and the second transmission interval; and transmitting a second RF signal in the second transmission interval based on the second state of each of the CFR module, the DPD module, and the power supply, the second RF signal being generated from a second baseband signal.

[0015] The method may further include: identifying a control signal for changing from the first state to the second state; and changing a state of each of the state of the CFR module, the state of the DPD module, and the state of the power supply based on the control signal. The control signal may include: information about a voltage corresponding to a maximum average power of the first RF signal and a voltage corresponding to a maximum average power of the second RF signal, and length information of the second transmission interval.

[0016] The method may further include: identifying first scheduling information for transmitting the first RF signal, and identifying second scheduling information for transmitting the second RF signal. The maximum average power of the first RF signal may be identified based on the first scheduling information. The maximum average power of the second RF signal may be identified based on the second scheduling information.

[0017] The electronic device may include a digital unit (DU) and a radio unit (RU), and the DU may be configured to provide a control signal to the RU.

[0018] The method may further include: identifying first in-phase / quadrature phase (I / Q) data in the first baseband signal, and identifying second I / Q data in the second baseband signal, the maximum average power of the first RF signal may be identified based on the first I / Q data, and the maximum average power of the second RF signal may be identified based on the second I / Q data.

[0019] The method may further include: identifying another voltage information of a third RF signal associated with a third transmission interval after a second transmission interval; based on the another voltage information of the third RF signal, changing the state of each of the CFR module, the DPD module, and the power supply from a second state to a third state during a second reception interval between the second transmission interval and the third transmission interval; and transmitting the third RF signal during the third transmission interval based on the third state of each of the CFR module, the DPD module, and the power supply, the third RF signal being generated from a third baseband signal, and the lengths of the first reception interval and the second transmission interval may be different from the lengths of the second reception interval and the third transmission interval.

[0020] The method may further include: setting a threshold of the CFR module in a first state to a first value; and setting a threshold of the CFR module in a second state to a second value based on the voltage information of the second RF signal.

[0021] The DPD module may include a plurality of look-up tables (LUTs). The method may further include: setting the LUT of the DPD module in a first state to a first LUT among the plurality of LUTs, and setting the LUT of the DPD module in a second state to a second LUT among the plurality of LUTs based on the voltage information of the second RF signal.

[0022] The method may further include: setting a direct current voltage supplied by the power supply in a first state to a first voltage, and setting a direct current voltage supplied by the power supply in a second state to a second voltage based on the voltage information of the second RF signal.

[0023] The method may further include: transmitting a first RF signal by amplifying using a power amplifier corresponding to the first state, and transmitting a second RF signal by amplifying using a power amplifier corresponding to the second state. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other aspects, features, and advantages of certain embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:

[0025] Figure 1a An example of a wireless communication system is shown;

[0026] Figure 1b An example for explaining a resource partitioning scheme for uplink transmission and downlink transmission is shown;

[0027] Figure 2 An example of a fronthaul interface is shown;

[0028] Figure 3 An example of a transmission path of an electronic device is shown;

[0029] Figure 4 An example of a transmission path of an electronic device for variably supplying a voltage in a time division duplex (TDD) scheme is shown;

[0030] Figure 5 A graph showing an example of a voltage variably supplied in a TDD scheme;

[0031] Figure 6 An example of an operation flow of an electronic device for amplifying a transmission signal based on a variable voltage in a TDD scheme is shown;

[0032] Figure 7 A graph showing an example of the instantaneous power consumed by an electronic device based on a voltage variably supplied in a TDD scheme; and

[0033] Figure 8 An example of a functional configuration of an electronic device is shown.

[0034] Regarding the description of the drawings, the same or similar reference numerals may be used for the same or similar components. Detailed Description

[0035] Before proceeding with the following detailed description, it may be advantageous to set forth definitions of certain words and phrases used throughout this disclosure. The terms "transmit," "receive," and "communicate," and derivatives thereof, include both direct and indirect communication. The terms "include" and "comprise," and derivatives thereof, indicate inclusion without limitation. The term "or" is an inclusive term, meaning "and / or." The phrase "associated with," and derivatives thereof, indicates inclusion, being included within, interconnected with, containing, being contained within, connected to or coupled with, capable of communicating with, cooperating with, interlacing, juxtaposing, adjacent to, bound to or bound with, having, having the attribute of, having a relationship to or with, etc. The phrase "at least one of" when used with a list of items means that different combinations of one or more of the listed items may be used and only one item in the list may be required. For example, "at least one of A, B, and C" includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C, and any variations thereof. Similarly, the term "group" means one or more. Thus, the group of items may be a single item or a collection of two or more items.

[0036] The terms used in this disclosure are only for describing specific embodiments and may not be intended to limit the scope of another embodiment. Singular expressions may include plural expressions unless they are clearly differently indicated in the context. The terms used herein (including technical or scientific terms) may have the same meaning as those commonly understood by persons having ordinary knowledge in the technical field described in this disclosure. Among the terms used in this disclosure, terms defined in a general dictionary may be interpreted with a meaning that is the same as or similar to the meaning in the context of the related art, and are not interpreted with an ideal or overly formal meaning unless clearly defined in this disclosure. In some cases, even terms defined in this disclosure may not be interpreted as excluding embodiments of this disclosure.

[0037] In one or more embodiments of the disclosure described below, hardware methods are described as examples. However, since one or more embodiments of the disclosure include technologies using both hardware and software, one or more embodiments of the disclosure do not exclude software-based methods.

[0038] Terms indicating components of devices used in the following description (such as lines, transmission lines, feed lines, power amplifiers, crest factor reduction (CFR) modules, digital pre-distortion (DPD) modules, modems, etc.) are exemplified. Therefore, the disclosure is not limited to the terms described below, and another term having an equivalent technical meaning may be used. In addition, terms such as “… unit”, “… device”, “… material”, “… body” used below may mean at least one shape structure or may mean a unit of processing function.

[0039] In addition, in the disclosure, to determine whether a specific condition is satisfied or fulfilled, expressions greater than or less than may be used, but this is only a description for illustrative examples and does not exclude descriptions of greater than or equal to or less than or equal to. A condition described as “greater than or equal to” may be replaced by “more than”, a condition described as “less than or equal to” may be replaced by “less than”, and a condition described as “greater than or equal to and less than” may be replaced by “greater than and less than or equal to”. In addition, “A” to “B” below means at least one of the elements from A (including A) to B (including B).

[0040] As used herein, expressions such as “at least one of...” modify the entire list of elements when preceding the list of elements, rather than modifying each individual element of the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0041] Figure 1a An example of a wireless communication system is shown.

[0042] Figure 1a Shows a wireless communication system according to an embodiment of the present disclosure. Figure 1a Shows a base station 110 and a terminal 120 that are part of a node using a wireless channel in a wireless communication system. Figure 1a Only one base station is shown, but another base station that is the same as or similar to the base station 110 may be further included.

[0043] The base station 110 is a network infrastructure that provides wireless access to the terminal 120. The base station 110 has a coverage that is defined as a certain geographical area based on the distance capable of transmitting signals. In addition to the base station, the base station 110 may be referred to as an "access point (AP)", "eNodeB (eNB)", "fifth-generation node (5G node)", "wireless point", "transmission / reception point (TRP)", or another term having an equivalent technical meaning.

[0044] The terminal 120 is a device used by a user and performs communication with the base station 110 through a wireless channel. In some cases, the terminal 120 may be operated without user participation. In other words, the terminal 120 is a device that performs machine type communication (MTC) and may not be carried by a user. In addition to the terminal, the terminal 120 may be referred to as a "user equipment (UE)", "mobile station", "subscriber station", "client premise equipment (CPE)", "remote terminal", "wireless terminal", "electronic device", or "user device", or another term having an equivalent technical meaning.

[0045] In the related art, in a communication system where the cell radius of a base station is relatively large, each base station is installed such that each base station includes the functions of a digital processing unit (or distributed unit (DU)) and a radio frequency (RF) processing unit (or radio unit (RU)). However, as high frequency bands are used in fourth-generation (4G) and / or subsequent communication systems (e.g., 5G), and the cell coverage range of the base station decreases, the number of base stations for covering a specific area has increased. The burden of the installation cost for the operator to install base stations has also increased. To reduce the installation cost of the base station, a structure has been proposed in which the DU and RU of the base station are separated, one or more RUs are connected to one DU through a wired network, and one or more geographically distributed RUs are arranged to cover a specific area. Hereinafter, reference will be made to Figure 2 Describe the deployment structure and expansion examples of the base station according to one or more embodiments of the present disclosure.

[0046] Figure 1b Shows an example for explaining a resource partitioning scheme for uplink transmission and downlink transmission. The resource partitioning scheme may include frequency division duplexing (FDD) and time division duplexing (TDD).

[0047] Figure 1b An example of a method for transmitting and receiving signals including data between a base station 110 and a terminal 120 shown in Figure 1a is provided. For example, the signal may include an orthogonal frequency division multiplexing (OFDM) signal.

[0048] Referring to Figure 1b , in the downlink (DL) transmission from the base station 110 to the terminal 120 and the uplink (UL) transmission from the terminal 120 to the base station 110, examples 150 and 160 of a method for partitioning resources for transmitting and receiving data are shown. Example 150 may indicate an example of a time division duplex (TDD) scheme, which is a method of partitioning resources for DL transmission and resources for UL transmission according to time. Example 160 may indicate an example of an FDD scheme, which is a method of partitioning resources for DL transmission and resources for UL transmission according to frequency.

[0049] Referring to example 150, the base station 110 may transmit a DL signal to the terminal 120 through the DL resource 152. The terminal 120 may receive the DL signal transmitted from the base station 110 through the DL resource 152. The terminal 120 may transmit a UL signal to the base station 110 through the UL resource 154. The base station 110 may receive the UL signal transmitted from the terminal 120 through the UL resource 154. Referring to example 150, different time resources may be allocated to the DL resource 152 and the UL resource 154. The DL transmission from the base station 110 to the terminal 120 and the UL transmission from the terminal 120 to the base station 110 may be performed in different time domains. Example 150 shows an example in which time resources of the same length are allocated to each of the DL resource 152 and the UL resource 154, but embodiments of the present disclosure are not limited thereto. For example, time resources of different lengths may be allocated to each of the DL resource 152 and the UL resource 154. In other words, the period for downlink transmission may be set differently from the period for uplink transmission. Alternatively, time resources of different lengths may be allocated to both the DL resource 152 and the UL resource 154. In other words, downlink transmission and uplink transmission may be performed aperiodically. In one embodiment, in example 150, a guard period may be included between the DL resource 152 and the UL resource 154.

[0050] Referring to Reference Example 160, the base station 110 may transmit a DL signal to the terminal 120 via the DL resource 162. The terminal 120 may receive the DL signal transmitted from the base station 110 via the DL resource 162. The terminal 120 may transmit a UL signal to the base station 110 via the UL resource 164. The base station 110 may receive the UL signal transmitted from the terminal 120 via the UL resource 164. In Reference Example 160, different frequency resources may be allocated to the DL resource 162 and the UL resource 164. In other words, the DL transmission from the base station 110 to the terminal 120 and the UL transmission from the terminal 120 to the base station 110 may be performed in different frequency domains. Example 160 shows an example in which frequency resources for the same-sized frequency band are allocated to each of the DL resource 162 and the UL resource 164, but embodiments of the present disclosure are not limited thereto. For example, frequency resources for different-sized frequency bands may be allocated to each of the DL resource 162 and the UL resource 164.

[0051] Comparing Comparative Example 150 and Example 160, compared with the DL resource 162 and the UL resource 164, the DL resource 152 and the UL resource 154 may be allocated frequency resources of a wider frequency band. For example, compared with the base station 110 or the terminal 120 in Example 160, the base station 110 or the terminal 120 in Example 150 may transmit a larger amount of data in the same time. In contrast, compared with the DL resource 152 and the UL resource 154, the DL resource 162 and the UL resource 164 are allocated frequency resources of a narrower frequency band, but may be allocated time resources of a longer time interval. For example, compared with the base station 110 or the terminal 120 in Example 150, the base station 110 or the terminal 120 in Example 160 may transmit seamlessly (or continuously).

[0052] To describe the TDD scheme in embodiments of the present disclosure, the resource structure of the TDD scheme defined in a communication standard (e.g., LTE or NR) is described by way of example. According to an embodiment, the base station 110 and the terminal 120 may use the TDD scheme of LTE. The TDD scheme of LTE defines time resources for downlink communication and time resources for uplink communication in one radio frame. The radio frame may include a UL subframe for UL transmission and a DL subframe for DL transmission. The frame may include a special subframe (SSF) for switching from downlink transmission to uplink transmission. Here, the combination of the UL subframe, DL subframe, and special subframe included in one frame is referred to as a UL / DL configuration. Another UL / DL configuration indicates another combination of the UL subframe, DL subframe, and special subframe in one frame. The UL / DL configuration may operate as shown in Table 1 below. In Table 1 below, D indicates a DL subframe, S indicates a special subframe, and U indicates a UL subframe. For example, UL / DL configuration #2 may include 6 DL subframes, 2 UL subframes, and 2 special subframes, and UL / DL configuration #5 may include 8 DL subframes, 1 UL subframe, and 1 special subframe.

[0053] [Table 1]

[0054]

[0055] The special subframe may include a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS). The DwPTS is an interval for downlink resources in the special subframe and may be used for the transmission of the physical downlink shared channel (PDSCH). The UpPTS is an interval for uplink resources in the special subframe and may be used for transmitting a sounding reference signal (SRS) or a physical random access channel (PRACH). The GP is an interval in which neither downlink transmission nor uplink transmission occurs and may be an interval required for downlink-uplink switching. The GP may be an interval (e.g., 1 ms) between the DwPTS and the UpPTS in one special subframe. Here, the combination of the DwPTS, guard period, and UpPTS included in one special subframe is referred to as a special subframe configuration (SSF configuration). Another SSF configuration indicates another combination of the length of the DwPTS, the length of the guard period, and the length of the UpPTS in one frame. In the case where the wireless communication environment supports the LTE-TDD scheme, the SSF configuration may operate as shown in Table 2 below. For example, SSF configuration #5 may indicate a combination in which the DwPTS occupies three (3) symbols, the guard period occupies nine (9) symbols, and the UpPTS occupies two (2) symbols, and SSF configuration #7 may indicate a combination in which the DwPTS occupies ten (10) symbols, the guard period occupies two (2) symbols, and the UpPTS occupies two (2) symbols.

[0056] [Table 2]

[0057]

[0058] According to the embodiment, the base station 110 and the terminal 120 may use the TDD scheme of NR. The TDD scheme of NR can be configured more flexibly than the LTE TDD scheme. The TDD scheme of NR defines a DL-UL pattern indicating the relationship between the DL time resources for downlink communication and the UL time resources for uplink communication. The DL-UL pattern may include a configuration period, a DL time interval, and a UL time interval. The configuration period may indicate the time during which one DL-UL pattern is applied. For example, the configuration period may be one of 0.5 ms, 0.625 ms, 1 ms, 1.25 ms, 2.5 ms, 3 ms, 4 ms, 5 ms, and 10 ms. The DL time interval may be the time resource during which downlink communication continues. The DL time interval may be represented by the number of time slots, may be represented by the number of time slots and the number of symbols, or may be represented only by the number of symbols. The DL time interval may be located in the beginning part of a configuration period. The UL time interval may be the time resource during which uplink communication continues. The UL time interval may be represented by the number of time slots, or may be represented by the number of time slots and the number of symbols, or may be represented only by the number of symbols. The UL time interval may be located in the end part of a configuration period. Time slots other than the DL time slots (time slots where all symbols are DL symbols) and UL time slots (time slots where all symbols are UL symbols) in a configuration period may be flexible time slots. It is also possible to distinguish downlink symbols, uplink symbols, and flexible symbols among the symbols of a time slot (e.g., 14 symbols). As an example of the resource structure of NR TDD, in the case where the subcarrier spacing (SCS) is 15 kHz, 5 time slots may be defined during a 5-ms configuration period. Among the five time slots, the first 2 time slots are downlink time slots, the last 2 time slots are uplink time slots, and the middle time slot may allow coexistence of uplink symbols and downlink symbols. Among the 14 symbols of the remaining time slot, the first 5 symbols may be downlink symbols, the last 3 symbols among the 14 symbols may be uplink symbols, and the remaining 6 symbols among the 14 symbols may be flexible symbols.

[0059] In a TDD scheme, since the same carrier frequency is used for uplink transmission and downlink transmission, it is necessary to distinguish between the DL time interval and the UL time interval. Therefore, as described above, the resource structure for a TDD scheme may include a DL time interval and a UL time interval, and a remaining interval between the DL time interval and the UL time interval. For example, a transmission path is used in the DL time interval in which the base station 110 transmits a signal, but a reception path may not be used in the UL time interval in which the base station 110 receives a signal, instead of the transmission path.

[0060] Figure 2 FIG. shows an example of a fronthaul interface according to an embodiment. Different from the backhaul between the base station and the core network, the fronthaul indicates between entities between the wireless LAN and the base station.

[0061] In Figure 2 FIG., an example of a fronthaul structure between a digital unit (DU) 210 and a radio unit (RU) 220 is shown. Embodiments of the present disclosure may also be applied to a fronthaul structure between one DU and multiple RUs. For example, embodiments of the present disclosure may be applied to a fronthaul structure between one DU and 2 RUs. In addition, embodiments of the present disclosure may be applied to a fronthaul structure between one DU and 3 RUs.

[0062] Referring to Figure 2 FIG., the base station 110 may include a DU 210 and an RU 220. The fronthaul 215 between the DU 210 and the RU 220 may operate through a fronthaul interface. For the operation of the fronthaul 215, for example, interfaces such as an enhanced common public radio interface (eCPRI) and a radio over Ethernet (ROE) may be used.

[0063] With the development of communication technologies, mobile data traffic has increased. Therefore, the bandwidth requirements for the fronthaul between the digital unit and the radio unit have increased significantly. In a deployment such as a centralized / cloud radio access network (C-RAN), the DU may be implemented to perform functions of a packet data convergence protocol (PDCP), a radio link control (RLC), a media access control (MAC), and a physical (PHY), and the RU may be implemented to perform functions of the PHY layer in addition to the RF function.

[0064] The DU 210 can be responsible for the upper-layer functions of the wireless network. For example, the DU 210 can perform the functions of the MAC layer and a part of the PHY layer. Here, a part of the PHY layer is performed at a relatively higher level among the functions of the PHY layer, and for example, can include channel coding (or channel decoding), scrambling (or descrambling), modulation (or demodulation), layer mapping (or layer demapping). According to an embodiment, when the DU 210 conforms to the O-RAN standard, it can be referred to as an O-RAN DU (O-DU). If necessary, in the embodiments of the present disclosure, the DU 210 can be represented by replacing it with a first network entity for a base station (e.g., gNB).

[0065] The RU 220 can be responsible for the lower-layer functions of the wireless network. For example, the RU 220 can perform a part of the PHY layer and RF functions. Here, a part of the PHY layer is performed at a relatively lower level than the DU 210 among the functions of the PHY layer, and for example, can include iFFT conversion (or FFT conversion), CP insertion (CP removal), and digital beamforming. Examples of such specific function separation are described in detail in Figure 4 . The RU 220 can be referred to as an "access unit (AU)", "AP", "TRP", "remote radio head (RRH)", "RU", or another term having an equivalent technical meaning. According to an embodiment, when the RU 220 conforms to the O-RAN standard, the RU 220 can be referred to as an O-RAN RU (O-RU). If necessary, in the embodiments of the present disclosure, the RU 220 can be represented by replacing it with a second network entity (e.g., gNB) for a base station.

[0066] Figure 2 The base station 110 is described as including the DU 210 and the RU 220, but the embodiments of the present disclosure are not limited thereto. A base station according to an embodiment can be implemented as a centralized unit (CU) configured to perform the functions of the upper layer of the access network (e.g., packet data convergence protocol (PDCP) and radio resource control (RRC)) and a distributed deployment of a distributed unit (DU) configured to perform the functions of the lower layer. In this case, the distributed unit (DU) can include Figure 2 the digital unit (DU) and the RU. Between the core (e.g., 5G core (5GC) or next-generation core (NGC) network) and the radio access network (RAN), the base station can be implemented in a structure where they are arranged in the order of CU, DU, and RU. The interface between the CU and the distributed unit (DU) can be referred to as the F1 interface.

[0067] A Centralized Unit (CU) can be responsible for functions at higher layers than a DU by connecting to one or more DUs. For example, the CU can be responsible for functions of the Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP) layers, and the DU and RU can be responsible for functions at lower layers. The DU can perform some functions of the Radio Link Control (RLC), Media Access Control (MAC), and Physical (PHY) layers (high PHY), and the RU can be responsible for the remaining functions of the PHY layer (low PHY). Additionally, for example, a Digital Unit (DU) can be included in a Distributed Unit (DU) depending on the implementation of the distributed deployment of the base station. Hereinafter, unless otherwise defined, it is described as the Digital Unit (DU) and RU operating, but one or more embodiments of the present disclosure can be applied to both a base station deployment including a CU or a deployment where the DU is directly connected to the core network (i.e., the CU and DU are integrated and implemented as a base station (e.g., an NG-RAN node) as one entity).

[0068] Hereinafter, in the present disclosure, in an electronic device that performs uplink transmission or downlink transmission through a TDD scheme, based on the maximum average power of a signal to be transmitted during a specific transmission interval, a structure for amplifying and transmitting the signal (hereinafter, a device and method for power amplification based on the maximum average power for each transmission interval in TDD) is described. The device and method for power amplification based on the maximum average power for each transmission interval in TDD according to an embodiment of the present disclosure can identify the maximum average power of a signal to be transmitted during a specific transmission interval during a reception interval before the specific transmission interval and can change the characteristics of a power amplifier. Therefore, the device and method for power amplification based on the maximum average power for each transmission interval in TDD can improve the power efficiency of the power amplifier and can improve linearity.

[0069] Figure 3 An example of a transmission path of an electronic device is shown.

[0070] Figure 3 An example of a transmission path for an electronic device 300 to generate an RF signal and transmit it to an external electronic device is shown.

[0071] Reference Figure 3 , the electronic device 300 can include a modem 305, a CFR module 310 (or CFR), a DPD module 315 (DPD), a Radio Frequency (RF) block 320, a power amplifier 325, and a power supply 330. Figure 3 The electronic device 300 is illustrated as a simplified block diagram, but the structure of the electronic device 300 is not limited to Figure 3components. For example, the electronic device 300 may further include a plurality of CFR modules 310, a plurality of DPD modules 315, a plurality of RF blocks 320, a plurality of power amplifiers 325, and a plurality of power supplies 330.

[0072] Referring Figure 3 , the electronic device 300 may generate an RF signal and may transmit the generated RF signal to an external electronic device. For example, the electronic device 300 may generate a baseband signal through the modem 305. Generating a baseband signal may be referred to as generating a waveform. For example, the baseband signal may include in-phase / quadrature-phase (I / Q) data (or I / Q samples). The modem 305 may be included in the processor.

[0073] For example, the electronic device 300 may reduce the peak-to-average power ratio (PAPR) of the baseband signal generated through the modem 305 through the CFR module 310. For example, the CFR module 310 may process the baseband signal within the range that satisfies the transmission limitations and conditions of the electronic device 300 to have an optimal PAPR.

[0074] For example, the CFR module 310 may perform a process of limiting the peak of the signal based on a specified threshold. For example, the CFR module 310 may adjust the PAPR of the signal by performing clipping, peak windowing, noise shaping, pulse injection, or peak cancellation methods on the baseband signal. For example, clipping may indicate a method in which the CFR module 310 changes a part of the signal corresponding to the specified threshold or more to the specified threshold. For example, peak windowing may indicate a method in which the CFR module 310 changes the maximum value in a part of the signal corresponding to the specified threshold or more to be equal to or less than the specified threshold while maintaining the waveform of the signal similar to the existing waveform. For example, peak cancellation may indicate a method in which the CFR module 310 changes a part of the signal to be equal to or less than the specified threshold while maintaining the waveform of the signal substantially the same in the remaining region except for the part of the signal corresponding to the specified threshold or more.

[0075] For example, the electronic device 300 may compensate for or improve the linearity of the power amplifier 325 through the DPD module 315. For example, the DPD module 315 may identify the signal output from the CFR module 310 and may apply inverse distortion (or predistortion) to the identified signal. Accordingly, the power amplifier 325 may output a linear signal by amplifying the non-linear signal inverse-distorted by the DPD module 315, which is different from the output of the non-linear signal in the case where the signal not processed by the DPD module 315 is amplified. For example, the DPD module 315 may improve the linearity based on at least one method using a look-up table, a Volterra series, a memory polynomial, or a specified algorithm.

[0076] For example, the electronic device 300 may up-convert a signal pre-processed by the DPD module 315 into an RF signal through the RF block 320. For example, the RF block 320 may include a digital-to-analog converter (DAC), a filter, a mixer, or a local oscillator. The RF block 320 may up-convert a signal output from the modem 305 and processed by the CFR module 310 and the DPD module 315 into a signal in the RF band.

[0077] For example, the electronic device 300 may amplify and output an RF band signal output through the RF block 320 through the power amplifier 325, and may transmit the output signal through a transmission antenna. To supply the voltage required to drive the power amplifier 325, the electronic device 300 may include a power supply 330. The power supply 330 may be connected to the power amplifier 325 and may supply a fixed voltage to the power amplifier 325. For example, the power supply 330 may supply a voltage corresponding to the maximum average power (or peak power) of the signal supplied to the power amplifier 325 as a fixed voltage. In other words, the power supply 330 may supply a voltage corresponding to the maximum average power as a fixed voltage regardless of the average power of the signal supplied to the power amplifier 325.

[0078] For example, the characteristics of the power amplifier 325 may change depending on the power (e.g., DC voltage) supplied by the power supply 330. For example, in the power amplifier 325, the drive point of the power amplifier 325 may change depending on the supplied power, and thus, the characteristics of the power amplifier 325 may change. The power amplifier 325 may amplify and output an RF signal based on the characteristics of the power amplifier 325, and may transmit the output signal through an antenna.

[0079] Referring to the above, the baseband signal processed by the CFR module 310 and the DPD module 315 is converted into an RF signal through the RF block 320. The RF signal may be amplified while maintaining linearity through the power amplifier 325. However, since a voltage corresponding to the maximum average power is fixedly supplied to the power amplifier 325, the electronic device 300 may amplify an RF signal in a region with low average power based on an unnecessarily high voltage. Therefore, when the power supply 330 supplies a fixed power, the power efficiency of the power amplifier 325 may decrease and the power consumption may increase.

[0080] Figure 4 An example of a transmission path of an electronic device for variably supplying voltage in a TDD scheme is shown.

[0081] Figure 4 An example of a transmission path for generating an RF signal and transmitting it to an external electronic device is shown. The electronic device 400 may represent Figure 1a an example of the base station 110 or the terminal 120.

[0082] Reference Figure 4 , the electronic device 400 may include a modem 405, a CFR module 410, a DPD module 415, a radio frequency block (RF block) 420, a power amplifier 425, and a power supply 430. Figure 4 The electronic device 400 is illustrated as a simplified block diagram, but the structure of the electronic device 400 is not limited to Figure 4 the components shown. For example, the electronic device 400 may further include multiple CFR modules 410, multiple DPD modules 415, multiple RF blocks 420, multiple power amplifiers 425, and multiple power supplies 430.

[0083] Reference Figure 4 , the electronic device 400 may generate an RF signal and may transmit the generated RF signal to an external electronic device. For example, the electronic device 400 may generate a baseband signal through the modem 405. Generating a baseband signal may be referred to as generating a waveform. For example, the baseband signal may include in-phase / quadrature phase (I / Q) data (or I / Q samples). The modem 405 may be included in the processor.

[0084] For example, the electronic device 400 may reduce the peak-to-average power ratio (PAPR) of the baseband signal generated through the modem 405 through the CFR module 410. For example, the CFR module 410 may process the baseband signal within the range that satisfies the transmission limitations and conditions of the electronic device 400 to have an optimal PAPR.

[0085] For example, the CFR module 410 may perform a process of limiting the peak of the signal based on a specified threshold. For example, the CFR module 410 may adjust the PAPR of the signal by performing clipping, peak windowing, noise shaping, pulse injection, or peak cancellation methods on the baseband signal. For example, clipping may indicate a method in which the CFR module 410 changes a part of the signal corresponding to a specified threshold or more to the specified threshold. For example, peak windowing may indicate a method in which the CFR module 410 changes the maximum value in a part of the signal corresponding to a specified threshold or more to be equal to or less than the specified threshold while maintaining the waveform of the signal similar to the existing waveform. For example, peak cancellation may indicate a method in which the CFR module 410 changes a part of the signal to be equal to or less than the specified threshold while maintaining the waveform of the signal substantially the same in the remaining area except for the part of the signal corresponding to the specified threshold or more.

[0086] For example, the electronic device 400 may compensate for or improve the linearity of the power amplifier 425 through the DPD module 415. For example, the DPD module 415 may identify the signal output from the CFR module 410. The DPD 415 may apply predistortion to the identified signal. Accordingly, the power amplifier 425 may output a linear signal by amplifying the non-linear signal predistorted by the DPD module 415, which is different from the output of the non-linear signal in the case where the signal not processed by the DPD module 415 is amplified. For example, the DPD module 415 improves linearity based on at least one method using a look-up table, a Volterra series, a memory polynomial, or a specified algorithm.

[0087] For example, the electronic device 400 may up-convert the signal preprocessed by the DPD module 415 into an RF signal through the RF block 420. For example, the RF block 420 may include a digital-to-analog converter (DAC), a filter, a mixer, or a local oscillator. The RF block 420 may up-convert the signal output from the modem 405 and processed by the CFR module 410 and the DPD module 415 into a signal in the RF band.

[0088] For example, the electronic device 400 may amplify and output the RF band signal output through the RF block 340 through the power amplifier 425, and may transmit the output signal through the transmission antenna. To supply the voltage required to drive the power amplifier 425, the electronic device 400 may include a power supply 430. The power supply 430 may be connected to the power amplifier 425. Different from Figure 3 the power supply 330, the power supply 430 may include a power supply that supplies variable power (e.g., DC voltage) to the power amplifier 425.

[0089] According to an embodiment, the modem 405 may be connected to the CFR module 410, the DPD module 415, and the power supply 430. For example, the modem 405 may be connected to the CFR module 410, the DPD module 415, and the power supply 430, and may provide a control signal 407 to each of the CFR module 410, the DPD module 415, and the power supply 430. The control signal 407 may include information for controlling the CFR module 410, the DPD module 415, and the power supply 430. For example, the control information may include information about the maximum average power of the signal transmitted in the transmission interval and information about the length of the transmission interval.

[0090] According to an embodiment, the control signal 407 may be provided to the CFR module 410, the DPD module 415, and the variable power supply 430 from the modem 405 during a reception interval between a previous transmission interval and a next transmission interval. For example, during a reception interval between a first transmission interval and a second transmission interval, the modem 405 may provide the control signal 407 to the CFR module 410, the DPD module 415, and the variable power supply 430, where the second transmission interval is a transmission interval after the first transmission interval.

[0091] According to an embodiment, the information about the maximum average power may include information indicating a difference between a voltage corresponding to the maximum average power of a signal transmitted in a specific transmission interval and a voltage corresponding to the maximum average power of a signal to be transmitted in a transmission interval after the specific transmission interval. For example, the information about the maximum average power may include information indicating a difference between a voltage corresponding to the maximum average power of a first RF signal transmitted in a first transmission interval and a voltage corresponding to the maximum average power of a second RF signal to be transmitted in a second transmission interval after the first transmission interval. Alternatively, the information about the maximum average power may include information indicating a voltage value corresponding to the maximum average power of a signal to be transmitted in a transmission interval. For example, in the above example, the information about the maximum average power may include information indicating a voltage value corresponding to the maximum average power of the second RF signal to be transmitted in the second transmission interval. In other words, the information about the maximum average power may include a difference (or change amount) between a voltage of a signal transmitted in a previous transmission interval and a voltage value of a signal to be transmitted in a next transmission interval, or an absolute value of the voltage value of the signal to be transmitted in the next transmission interval.

[0092] According to an embodiment, the information about the maximum average power may be identified based on scheduling information. For example, the maximum average power of a first RF signal to be transmitted in a first transmission interval may be identified based on first scheduling information. For example, the maximum average power of a second RF signal to be transmitted in a second transmission interval after the first transmission interval may be identified based on second scheduling information.

[0093] According to an embodiment, the information about the maximum average power may be identified based on I / Q data included in a baseband signal. For example, the maximum average power of a first RF signal to be transmitted in a first transmission interval may be identified based on first I / Q data. For example, the maximum average power of a second RF signal to be transmitted in a second transmission interval after the first transmission interval may be identified based on second I / Q data.

[0094] According to an embodiment, when the electronic device 400 is the base station 110, control information may be provided from the DU 210 included in the base station 110 to the RU 220. For example, the control information may be sent from the DU 210 to the RU 220 through a control plane message or a management plane message. For example, from the DU 210, control information including information about the maximum average power and information about the length of the transmission interval identified based on scheduling information may be sent to the RU (220), and the RU 220 may amplify and transmit a signal based on the control information. The DU 210 may include a processor or a modem 405, and the RU 220 may include a power amplifier 425.

[0095] According to an embodiment, the CFR module 410, the DPD module 415, and the power supply 430 may change states based on the control signal 407. For example, the CFR module 410, the DPD module 415, and the power supply 430 may change from a first state to a second state based on the control signal 407.

[0096] According to an embodiment, as the first state changes to the second state, the CFR module 410 may change the threshold of the CFR module 410. For example, in the first state, the CFR module 410 may set the threshold for adjusting the PAPR to a first value. In the case of changing to the second state through the control signal 407, the CFR module 410 may set the threshold for adjusting the PAPR to a second value. For example, when the maximum average power in the first state is the same as the maximum average power in the second state, the first value may be equal to the second value. For example, when the maximum average power in the first state is different from the maximum average power in the second state, the first value may be different from the second value.

[0097] According to an embodiment, as the first state changes to the second state, the DPD module 415 may change the look-up table (LUT) of the DPD module 415. For example, the DPD module 415 may include multiple LUTs. In the first state, the DPD module 415 may set the LUT for applying inverse distortion to a first LUT. In the case of changing to the second state through the control signal 407, the DPD module 415 may set the LUT for applying inverse distortion to a second LUT. For example, when the maximum average power in the first state is equal to the maximum average power in the second state, the first LUT may be equal to the second LUT. For example, when the maximum average power in the first state is different from the maximum average power in the second state, the first LUT may be different from the second LUT.

[0098] According to an embodiment, as the first state changes to the second state, the power supply 430 may change the magnitude of the DC power supplied by the power supply 430 to the power amplifier 425. For example, the power supply 430 may provide a first DC voltage to the power amplifier 425 in the first state. In the case of changing to the second state by the control signal 407, the power supply 430 may provide a second DC voltage to the power amplifier 425. For example, in the case where the maximum average power in the first state is the same as the maximum average power in the second state, the first DC voltage may be equal to the second DC voltage. For example, in the case where the maximum average power in the first state is different from the maximum average power in the second state, the first DC voltage may be different from the second DC voltage.

[0099] As described above, in the case where the first state and the second state are different from each other, although it has been described that the first value and the second value, the first LUT and the second LUT, and the first DC voltage and the second DC voltage are different from each other, embodiments of the present disclosure are not limited thereto. For example, in the case where the first state and the second state are different but substantially the same electrical states, the first value may be equal to the second value, the first LUT may be equal to the second LUT, and the first DC voltage may be equal to the second DC voltage.

[0100] According to an embodiment, as the first state changes to the second state, the power amplifier 425 may amplify and output the signal differently. For example, the drive point of the power amplifier 425 may change as the amplitude of the DC voltage supplied from the power supply 430 changes. In addition, the RF signal input to the power amplifier 425 can be generated by being processed by the CFR module 410 and the DPD module 415 in the changed state. In other words, the power supply DC voltage of the power supply 430 may be changed so as to output a power corresponding to the maximum average power identified based on the control signal 407. As the changed DC voltage is supplied, the settings of the CFR module 410 and the DPD module 415 may be changed so as to generate an RF signal in consideration of the characteristics of the power amplifier 425 whose drive point has changed. The settings of the CFR module 410 and the DPD module 415 may be changed so as to generate an RF signal having the maximum average power identified based on the control signal 407.

[0101] Reference Figure 3, the electronic device 300 can be amplified by amplifying the baseband signal processed by the CFR module 310 and the DPD module 315 into an RF signal via the RF block 320 and then amplifying it through the power amplifier 325. However, since the voltage corresponding to the maximum average power is fixedly supplied to the power amplifier 325, the electronic device 300 may amplify the RF signal in the region with low average power based on an unnecessarily high voltage. In other words, since the power supply 330 supplies a fixed value of power (e.g., voltage) even though the average power changes depending on the amount of data of the transmitted RF signal, the power efficiency of the power amplifier 325 of the electronic device 300 may be reduced and the power consumption may increase. On the contrary, referring to Figure 4 , the electronic device 400 can effectively amplify the signal by variably supplying power (e.g., DC voltage) to the power amplifier 425 based on the maximum average power of the signal to be transmitted in the transmission interval and processing the signal to be input to the power amplifier 425. The electronic device 400 can output the amplified signal through the power amplifier 425 based on the maximum average power of the signal to be transmitted for each transmission interval, thereby improving the efficiency of power amplification and reducing power consumption. In addition, the electronic device 400 can maintain linearity by processing and generating signals corresponding to the power amplifier 425 whose characteristics change according to the maximum average power.

[0102] Figure 5 is a graph showing an example of the voltage variably supplied in the TDD scheme.

[0103] Figure 5 shows in Figure 3 the electronic device 300 and Figure 4 the electronic device 400 an example of the voltage supplied to the power amplifier when sending signals to an external electronic device and receiving signals from the external electronic device using TDD. For example, Figure 3 the electronic device 300 or Figure 4 the electronic device 400 can include a base station or a terminal. The external electronic device can include a terminal or a base station.

[0104] Referring to Figure 5 , the graph 500 indicates the amplitude of the signal and the power supply voltage over time. The horizontal axis of the graph 500 indicates time. The left vertical axis of the graph 500 indicates the voltage amplitude (unit: V) of the amplified and output signal, and the right vertical axis of the graph 500 indicates the amplitude of the voltage supplied to the power amplifier to amplify the signal (unit: V).

[0105] Graph 500 shows lines indicating the voltage amplitudes of signals transmitted in transmission intervals 510, 520, 530, and 540. Graph 500 includes a first line 550 indicating the voltage supplied to a power amplifier (e.g., power amplifier 325) of electronic device 300 and a second line 560 indicating the voltage supplied to a power amplifier (e.g., power amplifier 425) of electronic device 400.

[0106] Referring to Graph 500, electronic device 300 or electronic device 400 may receive signals from an external electronic device in reception intervals 515, 525, 535, and 545 and may transmit signals to the external electronic device in transmission intervals 510, 520, 530, and 540. Reception intervals 515, 525, 535, and 545 and transmission intervals 510, 520, 530, and 540 may indicate time resources according to a TDD scheme. For example, in each of transmission intervals 510, 520, 530, and 540, electronic device 300 or electronic device 400 may perform an uplink transmission or a downlink transmission. In each of reception intervals 515, 525, 535, and 545, electronic device 300 or electronic device 400 may perform an uplink reception or a downlink reception.

[0107] For example, each of reception interval 515 and transmission intervals 510, reception interval 525 and transmission interval 520, reception interval 535 and transmission interval 530, and reception interval 545 and transmission interval 540 may be included in a period interval T. For example, reception interval 515 may indicate the time from 0 to t, and transmission interval 510 may indicate the time from t to T. For example, reception interval 525 may indicate the time from T to T + t, and transmission interval 520 may indicate the time from T + t to 2T. For example, reception interval 535 may indicate the time from 2T to 2T + t, and transmission interval 530 may indicate the time from 2T + t to 3T. For example, reception interval 545 may indicate the time from 3T to 3T + t, and transmission interval 540 may indicate the time from 3T + t to 4T.

[0108] In Figure 5 it is illustrated that electronic device 300 or 400 transmits / receives for periodically formed reception intervals 515, 525, 535, and 545 and transmission intervals 510, 520, 530, and 540, but embodiments of the present disclosure are not limited thereto. For example, embodiments of the present disclosure may include cases in which electronic device 300 or 400 transmits / receives with non-periodically formed reception intervals and transmission intervals. Additionally, in Figure 5In this case, a situation in which the reception interval is before the transmission interval is illustrated, but embodiments of the present disclosure are not limited thereto. For example, embodiments of the present disclosure may also include a situation in which the transmission interval is before the reception interval.

[0109] Referring to the first line 550, the electronic device 300 may supply a power supply voltage corresponding to a value at which the voltage amplitude of the transmission signal is maximum (or maximum average power) in the transmission intervals 510, 520, 530, and 540 to the power amplifier. For example, the electronic device 300 may supply a power supply voltage that maximizes the voltage amplitude of the transmission signal to the power amplifier through the power supply, regardless of the reception intervals 515, 525, 535, and 545 and the transmission intervals 510, 520, 530, and 540. In this case, the CFR module and the DPD module may be set to correspond to the characteristics of the power amplifier identified based on the power supply voltage.

[0110] Referring to the second line 560, the electronic device 400 may supply a power supply voltage corresponding to a value at which the voltage amplitude of the transmission signal is maximum (or maximum average power) within each of the transmission intervals 510, 520, 530, and 540 to the power amplifier. According to an embodiment, the electronic device 400 may supply a first power supply voltage corresponding to a value at which the voltage amplitude of the transmission signal is maximum (or maximum average power) in the Nth transmission interval 510 to the power amplifier. The first power supply voltage may indicate the amplitude of the power supply voltage indicated by a part of the second line 560 corresponding to the Nth transmission interval 510. For example, the power supply of the electronic device 400 may supply the first power supply voltage to the power amplifier.

[0111] According to an embodiment, the electronic device 400 may identify voltage information (e.g., maximum voltage amplitude or maximum average power) of a signal to be transmitted in the (N + 1)th transmission interval 520. For example, the electronic device 400 may identify the maximum voltage amplitude (or maximum average power) of the signal to be transmitted in the (N + 1)th transmission period 520 based on scheduling information or I / Q data. For example, the electronic device 400 may identify the maximum voltage amplitude of the signal to be transmitted in the (N + 1)th transmission interval 520 while transmitting a signal in the Nth transmission interval 510. Alternatively, the electronic device 400 may identify the maximum voltage amplitude of the signal to be transmitted in the (N + 1)th transmission interval 520 before the (N + 1)th transmission interval 520. Alternatively, the electronic device 400 may identify the maximum voltage amplitude of the signal to be transmitted in the (N + 1)th transmission interval 520 in the (N + 1)th reception interval 525.

[0112] According to an embodiment, the electronic device 400 may change the states of the CFR module, the DPD module, and the power supply based on the identified maximum voltage amplitude (or maximum average power) in the (N+1)th reception interval 525. For example, the electronic device 400 may change the states of the CFR module, the DPD module, and the power supply through a control signal identified based on the maximum voltage amplitude identified in the (N+1)th reception interval 525. The change in the state may include a change in the amplitude of the power supply voltage indicated by a part of the second line 560 corresponding to the (N+1)th reception interval 525. For example, the change in the state may include changing the amplitude of the power supplied by the power supply from a first power supply voltage to a second power supply voltage. The second power supply voltage may indicate the amplitude of the power supply voltage indicated by a part of the second line 560 corresponding to the (N+1)th transmission interval 520. For example, the second power supply voltage may have a higher value than the first power supply voltage, and the change in the state may include an increase (or boost) in the amplitude of the supplied power. Additionally, the change in the state may include changing the threshold of the PAPR of the CFR module and the LUT for applying the inverse distortion of the DPD module to correspond to the characteristics of the power amplifier to be changed according to the second power supply voltage. The threshold of the PAPR may indicate the threshold for adjusting the maximum signal amplitude. The LUT for applying the inverse distortion may indicate the LUT for compensating for the non-linear characteristics.

[0113] According to an embodiment, the electronic device 400 may provide a second power supply voltage corresponding to the value at which the voltage amplitude of the transmitted signal is maximum (or maximum average power) in the (N+1)th transmission interval 520. For example, the power supply of the electronic device 400 may supply the second power supply voltage to the power amplifier. The electronic device 400 may transmit a signal amplified by the power amplifier based on the second power supply voltage.

[0114] According to an embodiment, the electronic device 400 may provide a changed second power supply voltage based on the I / Q data of the transmitted signal while transmitting the signal amplified by the second power supply voltage in the (N+1)th transmission interval 520. For example, the electronic device 400 may identify the I / Q data of the signal in the (N+1)th transmission interval 520, and may transmit the amplified signal through the changed second power supply voltage based on the identified I / Q data even while transmitting the signal based on the second power supply voltage identified in the (N+1)th reception interval 525.

[0115] According to an embodiment, the electronic device 400 may identify voltage information (e.g., maximum voltage amplitude or maximum average power) of a signal to be transmitted in the (N+2)th transmission interval 530 during the (N+2)th reception interval 535. For example, the electronic device 400 may identify the maximum voltage amplitude (or maximum average power) of the signal to be transmitted in the (N+2)th transmission interval 530 based on scheduling information or I / Q data. For example, the electronic device 400 may identify the maximum voltage amplitude of the signal to be transmitted in the (N+2)th transmission interval 530 while transmitting a signal in the (N+1)th transmission interval 520. Alternatively, the electronic device 400 may identify the maximum voltage amplitude of the signal to be transmitted in the (N+2)th transmission interval 530 before the (N+2)th transmission interval 530. Alternatively, the electronic device 400 may identify the maximum voltage amplitude of the signal to be transmitted in the (N+2)th transmission interval 530 during the (N+2)th reception interval 535.

[0116] According to an embodiment, the electronic device 400 may change the states of the CFR module, the DPD module, and the power supply based on the identified maximum voltage amplitude (or maximum average power) during the (N+2)th reception interval 535. For example, the electronic device 400 may change the states of the CFR module, the DPD module, and the power supply through a control signal identified based on the maximum voltage amplitude identified during the (N+2)th reception interval 535. The change in state may include a change in the amplitude of the power supply voltage indicated by a part of the second line 560 corresponding to the (N+2)th reception interval 535. For example, the change in state may include changing the amplitude of the power supplied from a second power supply voltage to a third power supply voltage. The third power supply voltage may indicate the amplitude of the power supply voltage indicated by a part of the second line 560 corresponding to the (N+2)th transmission interval 530. For example, the third power supply voltage may have a lower value than the second power supply voltage, and the change in state may include a decrease in the amplitude of the supplied power. Additionally, the change in state may include changing the threshold of the PAPR of the CFR module and the LUT for applying inverse distortion of the DPD module to correspond to the characteristics of the power amplifier to be changed according to the third power supply voltage. The threshold of the PAPR may indicate a threshold for adjusting the maximum signal amplitude. The LUT for applying inverse distortion may indicate a LUT for compensating for nonlinear characteristics.

[0117] According to an embodiment, the electronic device 400 may provide the power amplifier with a third power supply voltage corresponding to a value at which the voltage amplitude of the signal transmitted therein is maximum (or maximum average power) in the (N+2)th transmission interval 530. For example, the power supply of the electronic device 400 may provide the third power supply voltage to the power amplifier. The electronic device 400 may transmit a signal amplified by the power amplifier based on the third power supply voltage.

[0118] According to an embodiment, while transmitting a signal amplified by a third power supply voltage in the (N+2)th transmission interval 530, the electronic device 400 may provide an altered third power supply voltage based on I / Q data of the transmitted signal. For example, in the (N+2)th transmission interval 530, the electronic device 400 may identify the I / Q data of the signal and transmit an amplified signal through the altered third power supply voltage based on the identified I / Q data even while transmitting a signal based on the third power supply voltage identified in the (N+2)th reception interval 535.

[0119] According to an embodiment, the electronic device 400 may identify voltage information (e.g., maximum voltage amplitude or maximum average power) of a signal to be transmitted in the (N+3)th transmission interval 540 in the (N+3)th reception interval 545. For example, the electronic device 400 may identify the maximum voltage amplitude (or maximum average power) of a signal to be transmitted in the (N+3)th transmission interval 540 based on scheduling information or I / Q data. For example, the electronic device 400 may identify the maximum voltage amplitude of a signal to be transmitted in the (N+3)th transmission interval 540 while transmitting a signal in the (N+2)th transmission interval 530. Alternatively, the electronic device 400 may identify the maximum voltage amplitude of a signal to be transmitted in the (N+3)th transmission interval 540 before the (N+3)th transmission interval 540. Alternatively, the electronic device 400 may identify the maximum voltage amplitude of a signal to be transmitted in the (N+3)th transmission interval 540 in the (N+3)th reception interval 545.

[0120] According to an embodiment, based on the identified maximum voltage amplitude (or maximum average power), the electronic device 400 may change the states of the CFR module, the DPD module, and the power supply in the (N+3)th reception interval 545. For example, the electronic device 400 may change the states of the CFR module, the DPD module, and the power supply through a control signal identified based on the maximum voltage amplitude identified in the (N+3)th reception interval 545. The change in the state may include a change in the amplitude of the power supply voltage indicated by a part of the second line 560 corresponding to the (N+3)th reception interval 545. For example, the change in the state may include changing the amplitude of the power supplied by the power supply from a third power supply voltage to a fourth power supply voltage. The fourth power supply voltage may indicate the amplitude of the power supply voltage indicated by a part of the second line 560 corresponding to the (N+3)th transmission interval 540. For example, the fourth power supply voltage may have a higher value than the third power supply voltage, and the change in the state may include an increase (boost) in the amplitude of the supplied power. Additionally, the change in the state may include changing the threshold of the PAPR of the CFR module and the LUT for applying inverse distortion of the DPD module to correspond to the characteristics of the power amplifier to be changed according to the fourth power supply voltage. The threshold of the PAPR may indicate a threshold for adjusting the maximum signal amplitude. The LUT for applying inverse distortion may indicate an LUT for compensating for nonlinear characteristics.

[0121] According to an embodiment, the electronic device 400 may provide a fourth power supply voltage corresponding to a value at which the voltage amplitude of the transmission signal therein is maximum (or maximum average power) in the (N + 3)-th transmission interval 540 to a power amplifier. For example, the power supply of the electronic device 400 may provide the fourth power supply voltage to the power amplifier. The electronic device 400 may transmit a signal amplified by the power amplifier based on the fourth power supply voltage.

[0122] According to an embodiment, while transmitting a signal amplified by the fourth power supply voltage in the (N + 3)-th transmission interval 540, the electronic device 400 may provide a changed fourth power supply voltage based on I / Q data of the transmitted signal. For example, in the (N + 3)-th transmission interval 540, the electronic device 400 may identify the I / Q data of the signal, and may transmit an amplified signal through the changed fourth power supply voltage based on the identified I / Q data even while transmitting a signal based on the fourth power supply voltage identified in the (N + 3)-th reception interval 545.

[0123] Reference Figure 5 , the apparatus and method for power amplification based on the maximum average power for each transmission interval in TDD according to an embodiment of the present disclosure may change the states of components (e.g., a CFR module, a DPD module, and a power supply) included in a transmission path, while reducing an impact on the transmission or reception performance of the electronic device by using TDD in which a transmission interval and a reception interval are distinguished. For example, the apparatus and method for power amplification based on the maximum average power for each transmission interval in TDD according to an embodiment of the present disclosure may change the state of transmission in a reception interval immediately before a transmission interval based on information on the maximum average power of a signal to be transmitted in the transmission interval. The apparatus and method for power amplification based on the maximum average power for each transmission interval in TDD according to an embodiment of the present disclosure may output a signal amplified by a power amplifier based on the maximum average power of a signal to be transmitted for each transmission interval, thereby improving the efficiency of power amplification and reducing power consumption. In addition, the apparatus and method for power amplification based on the maximum average power for each transmission interval in TDD according to an embodiment of the present disclosure may maintain linearity by processing and generating a signal to correspond to a power amplifier whose characteristics change according to the maximum average power.

[0124] Figure 6 An example of an operation flow of an electronic device for amplifying a transmission signal based on a variable voltage in a TDD scheme is shown.

[0125] Figure 6 The method of Figure 4 may be performed by the electronic device 400 of Figure 6 The method ofFigure 4 is executed by a processor of the electronic device 400. The processor may include Figure 4 a modem 405. Figure 6 The method shows an example in which the electronic device 400 uses a TDD scheme when transmitting a signal to an external electronic device and receiving a signal from the external electronic device.

[0126] The following transmission interval and reception interval may indicate a resource interval for the TDD scheme (or a time interval in which a frequency band is allocated (hereinafter, referred to as a time interval)). For example, in the case where the electronic device 400 is a base station, the transmission interval may indicate a resource interval for downlink transmission, and the reception interval may indicate a resource interval for uplink reception. Alternatively, in the case where the electronic device 400 is a terminal, the transmission interval may indicate a resource interval for uplink transmission, and the reception interval may indicate a resource interval for downlink reception. Hereinafter, the transmission interval and the reception interval may be alternately allocated, as Figure 1b shown in Example 150.

[0127] Referring to Figure 6 , in operation 600, the electronic device 400 may transmit a first RF signal (generated from a first baseband signal) based on a first state of each of the CFR module, the DPD module, and the power supply. For example, the electronic device 400 may generate a first RF signal by processing a first baseband signal generated from the modem via the CFR module and the DPD module in the first state and up-converting it via the RF block. According to an embodiment, the processor may amplify and transmit the first RF signal through a power amplifier that operates according to the power supplied based on the first state. The CFR module, the DPD module, and the power supply in the first state may include a CFR module in which a threshold for adjusting the PAPR is a first value, a DPD module in which a first LUT is set among a plurality of LUTs, and a power supply in which a DC voltage supplied to the power amplifier is a first voltage value.

[0128] In operation 610, the electronic device 400 may identify a maximum average power of a second RF signal associated with a second transmission interval. For example, the electronic device 400 may identify voltage information (e.g., a maximum voltage amplitude or a maximum average power) of the second RF signal associated with the second transmission interval. The second transmission interval is a transmission interval after the first transmission interval and may indicate a time interval after the first reception interval. The first reception interval may indicate a time interval between the first transmission interval and the second transmission interval.

[0129] For example, while transmitting the first RF signal in the first transmission interval, the electronic device 400 may identify the maximum voltage amplitude (or maximum average power) of the second RF signal to be transmitted in the second transmission interval. Alternatively, the electronic device 400 may identify the maximum voltage amplitude (or maximum average power) of the second RF signal to be transmitted in the second transmission interval before the second transmission interval. Alternatively, the electronic device 400 may identify the maximum voltage amplitude of the second RF signal to be transmitted in the second transmission interval in the first reception interval.

[0130] In operation 620, the electronic device 400 may change the first state to the second state based on the maximum average power of the second RF signal. For example, the electronic device 400 may change the states of the CFR module, the DPD module, and the power supply from the first state to the second state to generate and transmit the second RF signal according to the maximum average power in the first reception interval. The CFR, DPD module, and power supply in the second state may include a CFR module in which a threshold for adjusting the PAPR is a second value, a DPD module in which a second LUT is set among a plurality of LUTs, and a power supply in which a DC voltage supplied to the power amplifier is a second voltage value. The second value set in the CFR module in the second state may be different from the first value set in the CFR module in the first state. The second LUT set in the DPD module in the second state may be different from the first LUT set in the DPD module in the first state. The second voltage value set in the power supply in the second state may be different from the first voltage value set in the power supply in the first state.

[0131] According to an embodiment, the electronic device 400 may identify a control signal for changing from the first state to the second state. For example, the control information may include information about the maximum average power of the second RF signal to be transmitted in the second transmission interval and information about the length of the second transmission interval. For example, the information about the maximum average power may include information indicating a difference between a voltage corresponding to the maximum average power of the first RF signal transmitted in the first transmission interval and a voltage corresponding to the maximum average power of the second RF signal to be transmitted in the second transmission interval after the first transmission interval. Alternatively, the information about the maximum average power may include information indicating a voltage value corresponding to the maximum average power of the second RF signal to be transmitted in the second transmission interval. In other words, the information about the maximum average power may include a difference (or change amount) between the voltage of the first RF signal transmitted in the first transmission interval and the voltage value of the second RF signal to be transmitted in the second transmission interval, or an absolute value of the voltage value of the second RF signal to be transmitted in the second transmission interval.

[0132] According to an embodiment, information regarding a maximum average power may be identified based on scheduling information. For example, the maximum average power of a first RF signal to be transmitted in a first transmission interval may be identified based on first scheduling information. For example, the maximum average power of a second RF signal to be transmitted in a second transmission interval after the first transmission interval may be identified based on second scheduling information.

[0133] According to an embodiment, information regarding a maximum average power may be identified based on I / Q data included in a baseband signal. For example, the maximum average power of a first RF signal to be transmitted in a first transmission interval may be identified based on first I / Q data. For example, the maximum average power of a second RF signal to be transmitted in a second transmission interval after the first transmission interval may be identified based on second I / Q data.

[0134] According to an embodiment, in a first reception interval between a first transmission interval and a second transmission interval, a control signal for changing from a first state to a second state may be provided from a modem (or a processor) to a CFR module, a DPD module, and a variable power supply. In a first reception interval between a first transmission interval and a second transmission interval which is a transmission interval after the first transmission interval, the processor may provide a control signal to the CFR module, the DPD module, and the variable power supply.

[0135] According to an embodiment, when the electronic device 400 is a base station, control information may be provided from a DU (e.g., Figure 2 the DU 210) included in the base station to an RU (e.g., Figure 2 the RU 220). For example, the control information may be sent from the DU to the RU through a control plane message or a management plane message. For example, control information including information regarding the maximum average power identified based on scheduling information and information regarding the length of a transmission interval may be sent from the DU to the RU, and the RU may amplify and transmit a signal based on the control information. The DU may include a processor (or a modem (e.g., Figure 4 the modem 405)), and the RU may include a power amplifier (e.g., Figure 4 the power amplifier 425).

[0136] According to an embodiment, as the first state changes to the second state, the electronic device 400 may change a threshold of the CFR module. For example, in the first state, the electronic device 400 may set a threshold for adjusting the PAPR of the CFR module to a first value. In the case of changing to the second state through control information, the electronic device 400 may set a threshold for adjusting the PAPR of the CFR module to a second value.

[0137] According to an embodiment, as the first state changes to the second state, the electronic device 400 may change the look-up table (LUT) of the DPD module. For example, the DPD module may include a plurality of LUTs. In the first state, the electronic device 400 may set the LUT for applying inverse distortion of the DPD module to the first LUT. In the case of changing to the second state by control information, the electronic device 400 may set the LUT for applying inverse distortion of the DPD module to the second LUT.

[0138] According to an embodiment, as the first state changes to the second state, the electronic device 400 may change the magnitude of the DC power supplied from the power supply to the power amplifier. For example, in the first state, the electronic device 400 may set the power supply power of the power supply provided to the power amplifier to the first DC voltage. In the case of changing to the second state by control information, the electronic device 400 may set the power supply power of the power supply provided to the power amplifier to the second DC voltage.

[0139] In operation 630, the electronic device 400 may transmit a second RF signal generated from the second baseband signal by the CFR module, the DPD module, and the power supply based on the second state in the second transmission interval. For example, the electronic device 400 may generate a second RF signal by processing the second baseband signal generated from the modem via the CFR module and the DPD module in the second state and up-converting it via the RF block. According to an embodiment, the electronic device 400 may amplify and transmit the second RF signal through a power amplifier operating according to the power supplied based on the second state.

[0140] According to an embodiment, as the first state changes to the second state, the electronic device 400 may set the power amplifier to amplify and output a signal. For example, the magnitude of the DC voltage supplied from the power supply is changed such that the drive point of the power amplifier may be changed. In addition, the RF signal input to the power amplifier may be generated by being processed by the CFR module and the DPD module in the second state. In other words, the power supply DC voltage of the power supply may be changed so as to output a power corresponding to the maximum average power identified based on the control information. As the changed DC voltage is supplied, the settings of the CFR module and the DPD module may be changed so as to generate an RF signal in consideration of the characteristics of the power amplifier whose drive point is changed. The settings of the CFR module and the DPD module may be changed so as to generate a second RF signal having the maximum average power identified based on the control information.

[0141] According to an embodiment, the electronic device 400 may change a power voltage based on I / Q data of a second RF signal transmitted, and transmit the second RF signal in a second transmission interval based on a second state of each of a CFR module, a DPD module, and a power supply. For example, the electronic device 400 may identify the I / Q data of the second RF signal, and even while transmitting the second RF signal in the second transmission interval based on the power voltage identified in a first reception interval, may transmit an amplified second RF signal through the changed power voltage based on the identified I / Q data.

[0142] In Figure 6 it, according to an embodiment, the electronic device 400 may identify a maximum average power of a third RF signal associated with a third transmission interval after a second reception interval after the second transmission interval. According to an embodiment, the electronic device 400 may change from a second state to a third state based on the maximum average power of the third RF signal. For example, a processor may change the states of the CFR module, the DPD module, and the power supply from the second state to the third state. According to an embodiment, the electronic device 400 may transmit a third RF signal generated from a third baseband signal based on the CFR module, the DPD module, and the power supply in the third state in the third transmission interval.

[0143] According to an embodiment, the electronic device 400 may transmit an uplink signal or a downlink signal aperiodically. For example, the lengths of the first reception interval and the second transmission interval may be set differently from the lengths of the second reception interval and the third transmission interval.

[0144] According to an embodiment, the electronic device 400 may identify a control signal for changing a state in reception intervals having different time interval lengths. For example, to transmit the second RF signal in the second transmission interval, the electronic device 400 may identify the control signal in a first reception interval having a first length and may control to change the state. Additionally, to transmit the third RF signal in the third transmission interval, the electronic device 400 may identify the control signal in a second reception interval having a second length and may control to change the state. The first length may be set differently from the second length.

[0145] Reference Figure 6, an apparatus and method for power amplification based on the maximum average power per transmission interval in TDD according to an embodiment of the present disclosure may change the states of components (e.g., a CFR module, a DPD module, and a power supply) included in a transmission path, while reducing the impact on the transmission or reception performance of an electronic device by using TDD in which a transmission interval and a reception interval are distinguished. For example, an apparatus and method for power amplification based on the maximum average power per transmission interval in TDD according to an embodiment of the present disclosure may change the state of transmission in a reception interval immediately before a transmission interval based on information about the maximum average power of a signal to be transmitted in the transmission interval. An apparatus and method for power amplification based on the maximum average power per transmission interval in TDD according to an embodiment of the present disclosure may output a signal amplified by a power amplifier based on the maximum average power of a signal to be transmitted for each transmission interval, thereby improving the efficiency of power amplification and reducing power consumption. In addition, an apparatus and method for power amplification based on the maximum average power per transmission interval in TDD according to an embodiment of the present disclosure may maintain linearity by processing and generating a signal to correspond to a power amplifier whose characteristics change according to the maximum average power.

[0146] Figure 7 is a graph showing an example of instantaneous power consumed by an electronic device based on a variably supplied voltage in a TDD scheme.

[0147] Figure 7 shows Figure 3 electronic device 300 and Figure 4 electronic device 400 sending signals to an external electronic device by using TDD. For example, Figure 3 electronic device 300 or Figure 4 electronic device 400 may include a base station or a terminal. The external electronic device may include a terminal or a base station.

[0148] Figure 7 Graph 700 includes a first line 750 indicating the instantaneous power of a signal transmitted by electronic device 300 to an external electronic device over time and a second line 760 indicating the instantaneous power of a signal transmitted by electronic device 400 to an external electronic device over time. The horizontal axis of graph 700 indicates time, and the vertical axis indicates the instantaneous power (unit: W) of a signal consumed by electronic device 300 or 400.

[0149] Referring to the reference curve 700, the electronic device 300 or the electronic device 400 may receive signals from an external electronic device during the reception intervals 715, 725, 735, and 745, and may send signals to the external electronic device during the transmission intervals 710, 720, 730, and 740. The reception intervals 715, 725, 735, and 745 and the transmission intervals 710, 720, 730, and 740 may indicate time resources according to the TDD scheme. For example, during each of the transmission intervals 710, 720, 730, and 740, the electronic device 300 or the electronic device 400 may perform an uplink transmission or a downlink transmission. During each of the reception intervals 715, 725, 735, and 745, the electronic device 300 or the electronic device 400 may perform an uplink reception or a downlink reception.

[0150] For example, each of the reception interval 715 and the transmission intervals 710, the reception interval 725 and the transmission interval 720, the reception interval 735 and the transmission interval 730, and the reception interval 745 and the transmission interval 740 may be included in a time period interval T. For example, the reception interval 715 may indicate the time from 0 to t, and the transmission interval 710 may indicate the time from t to T. For example, the reception interval 725 may indicate the time from T to T + t, and the transmission interval 720 may indicate the time from T + t to 2T. For example, the reception interval 735 may indicate the time from 2T to 2T + t, and the transmission interval 730 may indicate the time from 2T + t to 3T. For example, the reception interval 745 may indicate the time from 3T to 3T + t, and the transmission interval 740 may indicate the time from 3T + t to 4T.

[0151] In Figure 7 it is illustrated that the electronic device 300 or 400 performs transmission / reception for the periodically formed reception intervals 715, 725, 735, and 745 and the transmission intervals 710, 720, 730, and 740, but the embodiments of the present disclosure are not limited thereto. For example, the embodiments of the present disclosure may include cases where the electronic device 300 or 400 performs transmission / reception with non-periodically formed reception intervals and transmission intervals. In addition, in Figure 7 it is illustrated that the reception interval is before the transmission interval, but the embodiments of the present disclosure are not limited thereto. For example, the embodiments of the present disclosure may further include cases where the transmission interval is before the reception interval.

[0152] Comparing the first line 750 and the second line 760, in transmission intervals 710, 720, and 730, the power consumed by the electronic device 400 when transmitting a signal can be lower than the power consumed by the electronic device 300 when transmitting a signal. For example, the electronic device 400 can change the states of the components (e.g., CFR 410, DPD 415, and power supply 430) of the electronic device 400 based on the maximum average power of the signals transmitted in each of the transmission intervals 710, 720, and 730, such that the instantaneous power of the consumed signal can be reduced compared to the electronic device 300. Additionally, in the transmission interval 740, the power consumed by the electronic device 400 when transmitting a signal can be substantially the same as the power consumed by the electronic device 300 when transmitting a signal. For example, since the maximum average power of the signal transmitted in the transmission interval 740 is the same as the maximum average power in all the transmission intervals 710, 720, 730, and 740, the electronic device 400 can have an instantaneous power of the consumed signal that is substantially the same as the instantaneous power of the consumed signal of the electronic device 300.

[0153] Referring to the above, the device and method for power amplification based on the maximum average power of each transmission interval in TDD according to an embodiment of the present disclosure can form a low instantaneous power of the signal in the remaining intervals except for the transmission interval including the maximum average power in the entire transmission interval. The device and method for power amplification based on the maximum average power of each transmission interval in TDD according to an embodiment of the present disclosure can form a lower instantaneous power than the case where the signal is amplified based on the voltage value corresponding to the maximum average power in the entire transmission interval, because the signal is amplified based on the voltage value corresponding to the maximum average power of each transmission interval. Therefore, the device and method for power amplification based on the maximum average power of each transmission interval in TDD according to an embodiment of the present disclosure can improve the efficiency of power amplification and can reduce power consumption. Additionally, the device and method for power amplification based on the maximum average power of each transmission interval in TDD according to an embodiment of the present disclosure can control other components (e.g., CFR, DPD) to maintain linearity by considering the characteristics of the power amplifier that change according to the voltage value.

[0154] Figure 8 An example of the functional configuration of an electronic device according to an embodiment is shown. The electronic device 810 can be one of a base station or a terminal. In the case where the electronic device 810 is a base station, the electronic device 810 can include a DU (e.g., Figure 2 DU 210) and an RU (e.g., Figure 2 RU 220). According to an embodiment, the electronic device 810 can be an MMU or a mmWave device. Not only through Figures 1a to 7The transmission structure for supplying variable voltage mentioned above, and the RF chain including the transmission structure and the structure of the electronic device including the transmission structure are also included in the embodiments of the present disclosure.

[0155] Reference Figure 8 , which shows an exemplary functional configuration of the electronic device 810. The electronic device 810 may include an antenna unit 811, a filter unit 812, an RF processing unit 813, and a control unit 814.

[0156] The antenna unit 811 may include a plurality of antennas. The antenna performs the function of transmitting and receiving signals through a wireless channel. The antenna may include a conductor formed on a substrate (e.g., antenna PCB, antenna board) or a radiator formed by a conductive pattern. The antenna may radiate an up-converted signal on the wireless channel, or may obtain a signal radiated by another device. Each antenna may be referred to as an antenna element or an antenna assembly. In some embodiments, the antenna unit 811 may include an antenna array (e.g., sub-array), where a plurality of antenna elements form an array. The antenna unit 811 may be electrically connected to the filter unit 812 through an RF signal line. The antenna unit 811 may be mounted on a PCB including a plurality of antenna elements. The PCB may include a plurality of RF signal lines connecting each antenna element and the filter of the filter unit 812. These RF signal lines may be referred to as a feed network. The antenna unit 811 may provide the received signal to the filter unit 812, or may radiate the signal provided from the filter unit 812 into the air.

[0157] According to one or more embodiments, the antenna unit 811 may include at least one antenna module having a dual-polarized antenna. The dual-polarized antenna may be, for example, a cross-polar (x-polar) antenna. The dual-polarized antenna may include two antenna elements corresponding to different polarizations. For example, the dual-polarized antenna may include a first antenna element having a +45° polarization and a second antenna element having a -45° polarization. It goes without saying that the polarization may be formed using other orthogonal polarizations in addition to +45° and -45°. Each antenna element may be connected to a feed line and may be electrically connected to the filter unit 812, the RF processing unit 813, and the control unit 814 to be described later.

[0158] The dual-polarized antenna may be a patch antenna (or microstrip antenna). By having the form of a patch antenna, the dual-polarized antenna can be easily implemented and integrated into an array antenna. Two signals having different polarizations may be input to each antenna port. Each antenna port corresponds to an antenna element. For high efficiency, it is necessary to optimize the relationship between the co-polarization characteristics and the cross-polarization characteristics between two signals having different polarizations. In the dual-polarized antenna, the co-polarization characteristics indicate the characteristics of a specific polarization component, and the cross-polarization characteristics indicate the characteristics of a polarization component different from the specific polarization component.

[0159] The filter unit 812 may perform filtering to transmit a signal of a desired frequency. The filter unit 812 may perform a function of selectively identifying a frequency by forming resonance. In some embodiments, the filter unit 812 may form resonance through a cavity including a dielectric in terms of structure. Additionally, in some embodiments, the filter unit 812 may form resonance through elements forming an inductor or a capacitor. Furthermore, in some embodiments, the filter unit 812 may include a bulk acoustic wave (BAW) filter or a surface acoustic wave (SAW) filter, such as an elastic filter. The filter unit 812 may include at least one of a band-pass filter, a low-pass filter, a high-pass filter, or a band-stop filter. In other words, the filter unit 812 may also include an RF circuit for obtaining a signal of a transmission band or a reception band for transmission. The filter unit 812 according to one or more embodiments may electrically connect the antenna unit 811 and the RF processing unit 813.

[0160] The RF processing unit 813 may include a plurality of RF paths. An RF path may be a unit of a path through which a signal received through an antenna or a signal radiated through an antenna passes. At least one RF path may be referred to as an RF chain. The RF chain may include a plurality of RF components. The RF components may include an amplifier, a mixer, an oscillator, a DAC, an ADC, etc. For example, the RF processing unit 813 may include an upconverter that upconverts a digital transmission signal of a baseband to a transmission frequency, and a digital-to-analog converter (DAC) that converts the upconverted digital transmission signal into an analog RF transmission signal. The upconverter and the DAC form a part of a transmission path. The transmission path may further include a power amplifier (PA) or a coupler (or a combiner). Additionally, for example, the RF processing unit 813 may include an analog-to-digital converter (ADC) that converts an analog RF reception signal into a digital reception signal and a downconverter that converts the digital reception signal into a digital reception signal of a baseband. The ADC and the downconverter form a part of a reception path. The reception path may further include a low-noise amplifier (LNA) or a coupler (or a divider). The RF components of the RF processing unit may be implemented on a PCB. The electronic device 810 may include a stacked structure in the order of the antenna unit 811 - the filter unit 812 - the RF processing unit 813. The antenna and the RF components of the RF processing unit may be implemented on a PCB, and a plurality of layers may be formed by repeatedly fastening filters between PCBs. The CFR 410, the DPD 415, the RF block 420, the power amplifier 425, and the power supply 430 of the electronic device 400 according to an embodiment of the present disclosure may be included in the RF processing unit 813.

[0161] The control unit 814 may control the overall operation of the electronic device 810. The control unit 814 may include various modules for performing communication. The control unit 814 may include at least one processor such as a modem. The control unit 814 may include a module for digital signal processing. For example, the control unit 814 may include a modem. When transmitting data, the control unit 814 generates complex symbols by encoding and modulating the transmitted bit string. Additionally, for example, when receiving data, the control unit 814 recovers the received bit string by demodulating and decoding the baseband signal. The control unit 814 may execute the functions of the protocol stack required by the communication standard. The modem 405 of the electronic device 400 according to an embodiment of the present disclosure may be included in the control unit 814.

[0162] In Figure 8 the functional configuration of the electronic device 810 has been described. However, Figure 8 the example shown in Figures 1a to 7 is only an exemplary configuration of a device and method for power amplification based on the maximum average power per transmission interval in TDD using an embodiment of the present disclosure described through Figure 8 and embodiments of the present disclosure are not limited to the components of the device shown in Figure 8 . Accordingly, a configuration of a communication device including a transmission structure for power amplification based on the maximum average power per transmission interval in TDD according to an embodiment of the present disclosure and a communication device including the communication device may also be understood as an embodiment of the present disclosure.

[0163] Referring to the above, a device and method for power amplification based on the maximum average power per transmission interval in TDD according to an embodiment of the present disclosure may effectively amplify a signal by variably supplying power (e.g., DC voltage) to a power amplifier based on the maximum average power of the signal to be transmitted in a transmission interval and processing the signal to be input to the power amplifier. A device and method for power amplification based on the maximum average power per transmission interval in TDD according to an embodiment of the present disclosure may output the signal amplified by the power amplifier based on the maximum average power of the signal to be transmitted for each transmission interval, thereby improving the efficiency of power amplification and reducing power consumption. Additionally, a device and method for power amplification based on the maximum average power per transmission interval in TDD according to an embodiment of the present disclosure may maintain linearity by processing and generating a signal corresponding to a power flow whose characteristics change according to the maximum average power.

[0164] As mentioned above, the electronic device may include a processor. The electronic device may include a power amplifier. The electronic device may include a power supply for the power amplifier. The electronic device may include a CFR module. The electronic device may include a DPD module. The processor may be configured to transmit a first RF signal generated from a first baseband signal based on a first state of the CFR module, the DPD module, and the power supply during a first transmission interval of a TDD scheme. The processor may be configured to identify voltage information of a second RF signal associated with a second transmission interval after the first transmission interval. The processor may be configured to change the states of the CFR module, the DPD module, and the power supply from the first state to a second state during a first reception interval between the first transmission interval and the second transmission interval based on the voltage information. The processor may be configured to transmit a second RF signal generated from a second baseband signal based on the second state of the CFR module, the DPD module, and the power supply during the second transmission interval.

[0165] According to an embodiment, the processor may be configured to identify a control signal for changing from the first state to the second state. The processor may be configured to change the states of the CFR module, the DPD module, and the power supply based on the control signal. The control signal includes information about a voltage corresponding to a maximum average power of the first RF signal and a voltage corresponding to a maximum average power of the second RF signal, and length information of the second transmission interval.

[0166] According to an embodiment, the processor may be configured to identify first scheduling information for transmitting the first RF signal. The processor may be configured to identify second scheduling information for transmitting the second RF signal. The maximum average power of the first RF signal is identified based on the first scheduling information. The maximum average power of the second RF signal is identified based on the second scheduling information.

[0167] According to an embodiment, the electronic device may include a DU and an RU. Control information is provided from the DU to the RU.

[0168] According to an embodiment, the processor may be configured to identify first in-phase / quadrature phase (I / Q) data included in the first baseband signal. The processor may be configured to identify second I / Q data included in the second baseband signal. The maximum average power of the first RF signal is identified based on the first I / Q data. The maximum average power of the second RF signal is identified based on the second I / Q data.

[0169] According to an embodiment, the processor may be configured to identify another voltage information of a third RF signal associated with a third transmission interval after a second transmission interval. The processor may be configured to change the states of the CFR module, the DPD module, and the power supply from a second state to a third state based on the another voltage information of the third RF signal in a second reception interval between the second transmission interval and the third transmission interval. The processor may be configured to transmit a third RF signal generated from a third baseband signal based on the third states of the CFR module, the DPD module, and the power supply in the third transmission interval. The lengths of the first reception interval and the second transmission interval are different from the lengths of the second reception interval and the third transmission interval.

[0170] According to an embodiment, the processor may be configured to set a threshold of the CFR module in a first state to a first value. The processor may be configured to set the threshold of the CFR module in a second state to a second value based on the voltage information of the second RF signal.

[0171] According to an embodiment, the DPD module includes a plurality of look-up tables (LUTs). The processor may be configured to set the LUT of the DPD module in a first state to a first LUT among the plurality of LUTs. The processor may be configured to set the LUT of the DPD module in a second state to a second LUT among the plurality of LUTs based on the voltage information of the second RF signal.

[0172] According to an embodiment, the processor may be configured to set a direct current supplied by the power supply in a first state to a first voltage. The processor may be configured to set the direct current supplied by the power supply in a second state to a second voltage based on the voltage information of the second RF signal.

[0173] According to an embodiment, the processor may be configured to transmit a first RF signal by amplifying using a power amplifier corresponding to the first state. The processor may be configured to transmit a second RF signal by amplifying using a power amplifier corresponding to the second state.

[0174] As mentioned above, a method performed by an electronic device may include: transmitting a first RF signal generated from a first baseband signal in a first transmission interval of a TDD scheme based on a first state of a CFR module, a DPD module, and a power supply for a power amplifier of the electronic device. The method includes identifying voltage information of a second RF signal associated with a second transmission interval after the first transmission interval. The method may include: changing the states of the CFR module, the DPD module, and the power supply from the first state to the second state based on the voltage information in a first reception interval between the first transmission interval and the second transmission interval. The method may include transmitting a second RF signal generated from a second baseband signal in the second transmission interval based on the second states of the CFR module, the DPD module, and the power supply.

[0175] According to an embodiment, the method may include identifying a control signal for changing from a first state to a second state. The method may include changing the states of the CFR module, the DPD module, and the power supply based on the control signal. The control signal includes information about a voltage corresponding to a maximum average power of a first RF signal and a voltage corresponding to a maximum average power of a second RF signal, and information about a length of a second transmission interval.

[0176] According to an embodiment, the method may include identifying first scheduling information for transmitting a first RF signal. The method may include identifying second scheduling information for transmitting a second RF signal. The maximum average power of the first RF signal is identified based on the first scheduling information. The maximum average power of the second RF signal is identified based on the second scheduling information.

[0177] According to an embodiment, an electronic device may include a DU and an RU. Control information is provided from the DU to the RU.

[0178] According to an embodiment, the method may include identifying first in-phase / quadrature (I / Q) data included in a first baseband signal. The method may include identifying second I / Q data included in a second baseband signal. The maximum average power of the first RF signal is identified based on the first I / Q data. The maximum average power of the second RF signal is identified based on the second I / Q data.

[0179] According to an embodiment, the method may include identifying further voltage information of a third RF signal associated with a third transmission interval after the second transmission interval. The method may include changing the states of the CFR module, the DPD module, and the power supply from the second state to a third state in a second reception interval between the second transmission interval and the third transmission interval based on the further voltage information of the third RF signal. The method may include transmitting a third RF signal generated from a third baseband signal in the third transmission interval based on the third states of the CFR module, the DPD module, and the power supply. The lengths of the first reception interval and the second transmission interval are different from the lengths of the second reception interval and the third transmission interval.

[0180] According to an embodiment, the method may include setting a threshold of the CFR module in the first state to a first value. The method may include setting a threshold of the CFR module in the second state to a second value based on the voltage information of the second RF signal.

[0181] According to an embodiment, the DPD module includes a plurality of look-up tables (LUTs). The method may include setting the LUT of the DPD module in the first state to a first LUT among the plurality of LUTs. The method may include setting the LUT of the DPD module in the second state to a second LUT among the plurality of LUTs based on the voltage information of the second RF signal.

[0182] According to an embodiment, the method may include setting a DC voltage supplied by a power supply in a first state to a first voltage. The method may include setting a DC voltage supplied by the power supply in a second state to a second voltage based on voltage information of a second RF signal.

[0183] According to an embodiment, the method may include transmitting a first RF signal by amplifying it using a power amplifier corresponding to the first state. The method may include transmitting a second RF signal by amplifying it using a power amplifier corresponding to the second state.

[0184] The method according to the embodiments described in the claims or the specification of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

[0185] When implemented as software, a computer-readable storage medium storing one or more programs (software modules) may be provided. The one or more programs stored in the computer-readable storage medium are configured to be executed by one or more processors in an electronic device. The one or more programs include instructions that cause the electronic device to execute the method according to the embodiments described in the claims or the specification of the present disclosure.

[0186] Such a program (software module, software) may be stored in a random access memory, a non-volatile memory including flash memory, a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage device, a CD-ROM (compact disc read-only memory), a DVD (digital versatile disc), or other forms of optical memory, a magnetic tape cassette. Alternatively, it may be stored in a memory configured with some or all of their combinations. In addition, each configured memory may include a plurality.

[0187] Furthermore, the program may be stored in an attachable storage device that can be accessed through a communication network such as the Internet, an intranet, a local area network (LAN), a wide area network (WAN), or a storage area network (SAN) or a combination thereof. Such a storage device may be connected to the device implementing the embodiments of the present disclosure through an external port. Additionally, a separate storage device on the communication network may access the device implementing the embodiments of the present disclosure.

[0188] In the above specific embodiments of the present disclosure, according to the presented specific embodiments, the components included in the present disclosure are represented in singular or plural. However, the singular or plural expression is appropriately selected according to the presented situation, and the present disclosure is not limited to singular or plural components, and even if the components are expressed in plural, it may be configured in singular, or even if it is expressed in singular, it may be configured in plural.

[0189] In the detailed description of the present disclosure, specific embodiments have been described, but it goes without saying that various modifications are possible without departing from the scope of the present disclosure.

Claims

1. An electronic device, comprising: A processor; A power amplifier; A power supply configured to supply power to the power amplifier; A crest factor reduction (CFR) module; And A digital predistortion (DPD) module, Wherein, the processor is configured to: Transmit a first radio frequency (RF) signal in a first transmission interval based on a first state of each of the CFR module, the DPD module, and the power supply, the first RF signal being generated from a first baseband signal; Identify voltage information of a second RF signal associated with a second transmission interval after the first transmission interval; In a first reception interval between the first transmission interval and the second transmission interval, change the state of each of the CFR module, the DPD module, and the power supply from the first state to a second state based on the voltage information; and Transmit a second RF signal generated from a second baseband signal in the second transmission interval based on the second state of each of the CFR module, the DPD module, and the power supply.

2. The electronic device according to claim 1, wherein, The processor is further configured to: Identify a control signal for changing from the first state to the second state; And Based on the control signal, change the state of the CFR module, the state of the DPD module, and the state of the power supply, and Wherein, the control signal includes: Information about a voltage corresponding to the maximum average power of the first RF signal and a voltage corresponding to the maximum average power of the second RF signal, and Length information of the second transmission interval.

3. The electronic device according to claim 2, wherein, The processor is further configured to: Identify first scheduling information for transmitting the first RF signal, and Identify second scheduling information for transmitting the second RF signal, Wherein, the maximum average power of the first RF signal is identified based on the first scheduling information, and Wherein, the maximum average power of the second RF signal is identified based on the second scheduling information.

4. The electronic device according to claim 2, wherein, The electronic device includes a digital unit (DU) and a radio unit (RU), and Wherein, the DU is configured to provide a control signal to the RU.

5. The electronic device according to claim 2, wherein, The processor is further configured to: Identify first in-phase / quadrature (I / Q) data in the first baseband signal, and Identify second I / Q data in the second baseband signal, Wherein, the maximum average power of the first RF signal is identified based on the first I / Q data, and Wherein, the maximum average power of the second RF signal is identified based on the second I / Q data.

6. The electronic device according to claim 1, wherein, The processor is further configured to: Identify another voltage information of a third RF signal associated with a third transmission interval after the second transmission interval, Based on the another voltage information of the third RF signal, in a second reception interval between the second transmission interval and the third transmission interval, change the state of each of the CFR module, the DPD module, and the power supply from the second state to a third state, and Transmit a third RF signal in the third transmission interval based on the third state of each of the CFR module, the DPD module, and the power supply, the third RF signal being generated from a third baseband signal, Wherein, the lengths of the first reception interval and the second transmission interval are different from the lengths of the second reception interval and the third transmission interval.

7. The electronic device according to claim 1, wherein, The processor is further configured to: Set a threshold of the CFR module in the first state to a first value; and Based on the voltage information of the second RF signal, set a threshold of the CFR module in the second state to a second value.

8. The electronic device according to claim 1, wherein, The DPD module includes multiple look-up tables (LUTs). Wherein, the processor is further configured to: Set the LUT of the DPD module in the first state to the first LUT among the multiple LUTs, and Based on the voltage information of the second RF signal, set the LUT of the DPD module in the second state to the second LUT among the multiple LUTs.

9. The electronic device according to claim 1, wherein, The processor is further configured to: Set the direct current supplied by the power supply in the first state to the first voltage, and Based on the voltage information of the second RF signal, set the direct current supplied by the power supply in the second state to the second voltage.

10. The electronic device according to claim 1, wherein, The processor is further configured to: Transmit the first RF signal by amplification using the power amplifier corresponding to the first state, and Transmit the second RF signal by amplification using the power amplifier corresponding to the second state.

11. A method performed by an electronic device, the method comprising: Transmit a first radio frequency (RF) signal in a first transmission interval based on the first state of each of a crest factor reduction (CFR) module, a digital predistortion (DPD) module, and a power supply for a power amplifier in the electronic device, the first RF signal being generated from a first baseband signal; Identify the voltage information of a second RF signal associated with a second transmission interval after the first transmission interval; In a first reception interval between the first transmission interval and the second transmission interval, change the state of each of the CFR module, the DPD module, and the power supply from the first state to the second state based on the voltage information; And Transmit a second RF signal in the second transmission interval based on the second state of each of the CFR module, the DPD module, and the power supply, the second RF signal being generated from a second baseband signal.

12. The method according to claim 11, further comprising: Identify a control signal for changing from the first state to the second state; And Based on the control signal, change the state of each of the state of the CFR module, the state of the DPD module, and the state of the power supply, and Wherein, the control signal includes: Information about the voltage corresponding to the maximum average power of the first RF signal and the voltage corresponding to the maximum average power of the second RF signal, and The length information of the second transmission interval.

13. The method according to claim 12, further comprising: Identify first scheduling information for transmitting the first RF signal, and Identify second scheduling information for transmitting the second RF signal, Wherein, the maximum average power of the first RF signal is identified based on the first scheduling information, and Wherein, the maximum average power of the second RF signal is identified based on the second scheduling information.

14. The method according to claim 13, wherein, The electronic device includes a digital unit DU and a radio unit RU, and Wherein, the DU is configured to provide a control signal to the RU.

15. The method according to claim 12, further comprising: Identify first in-phase / quadrature phase (I / Q) data in the first baseband signal, and Identify second I / Q data in the second baseband signal, Wherein, the maximum average power of the first RF signal is identified based on the first I / Q data, and Wherein, the maximum average power of the second RF signal is identified based on the second I / Q data.

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