A signal processing method and apparatus

Abstract

A signal processing method and device, comprising: when a first radio frequency transmitting channel works in a first bandwidth, the first radio frequency transmitting channel is configured to provide a signal processed by digital pre-distortion to a first PA, and a first power supply module is configured to provide a non-envelope waveform power supply voltage to the first PA; the first PA is used to amplify the first signal output by the first radio frequency transmitting channel; when the first radio frequency transmitting channel works in a second bandwidth, the first power supply module is configured to provide an envelope waveform power supply voltage to the first PA; and the first radio frequency transmitting channel is configured to provide a signal not processed by digital pre-distortion to the first PA. In the above scheme, when the bandwidth is switched, the LUT required for digital pre-distortion processing does not need to be adjusted, and the LUT required for generating the envelope waveform power supply voltage does not need to be adjusted, so that the bandwidth can be quickly switched, and the non-linear distortion of the output signal of the first radio frequency transmitting channel can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, and particularly relates to a signal processing method and device. BACKGROUND

[0002] A radio frequency power amplifier (PA) is a very important device in modern communication equipment. Its main function is to amplify an input small power signal to a rated power level specified by a communication system standard through a direct current function, and then feed the signal to a back-end device such as a duplexer and an antenna for wireless transmission. Due to the characteristics of the PA itself, the PA usually exhibits very strong nonlinear characteristics when working. Such nonlinear characteristics can cause deterioration of signal transmission quality and nonlinear distortion of signals. Therefore, the nonlinear gain of the PA can be reduced by using a digital pre-distortion (DPD) technology and an envelope tracking (ET) technology. In the DPD technology, a nonlinear behavior model is used to fit the nonlinear characteristics of the PA, and then a pre-distortion coefficient corresponding to the nonlinear characteristics of the PA is obtained. The pre-distortion coefficient is stored in a pre-distortion coefficient look-up table (LUT), and the pre-distortion coefficient LUT can be loaded into a DPD core, so that the DPD core has nonlinear characteristics opposite to those of the PA. When a signal passes through the two modules with opposite nonlinear characteristics, the nonlinear characteristics of the two modules cancel each other out, and finally a linear output is obtained.

[0003] In the ET technology, an ET power module is used to supply power to the PA. The ET power module can change according to the envelope variation of the input radio frequency signal of the PA. When the envelope of the radio frequency signal is large, a higher supply voltage is provided, and when the envelope is small, a lower supply voltage is provided. Therefore, the power consumption of the PA can be greatly reduced, and the energy conversion efficiency of the PA can be significantly improved.

[0004] Since the nonlinear characteristics of the PA under different working conditions such as frequency, power, temperature, and bandwidth are very different, and different PAs or the same PA connected to different radio frequency channels need to be adapted by configuring different pre-distortion coefficient LUTs for the DPD core. For example, when the PA is connected to a different radio frequency channel, the DPD core needs to be configured with a different pre-distortion coefficient LUT to adapt to the nonlinear characteristics of the PA under the working condition of the new radio frequency channel. Figure 1As shown, there are two pre-distortion coefficient LUTs, pre-distortion coefficient LUT1 and pre-distortion coefficient LUT2, and through a control signal, when the PA works in bandwidth 1, the DPD core can be controlled to load the pre-distortion coefficient LUT1 corresponding to bandwidth 1 to perform digital pre-distortion processing on the input radio frequency signal; when the PA works in bandwidth 2, the DPD core can be controlled to load the pre-distortion coefficient LUT2 corresponding to bandwidth 2 to perform digital pre-distortion processing on the input radio frequency signal, thereby effectively reducing the nonlinear distortion of the PA.

[0005] Correspondingly, the ET power supply module also needs to adapt different envelope tracking LUTs according to factors such as frequency, power, temperature, and bandwidth. Since the pre-distortion coefficient LUT in the DPD core and the envelope tracking LUT in the ET power supply module need to be adapted in different situations, adapting the pre-distortion coefficient LUT and the envelope tracking LUT not only has a large control overhead, but also cannot be applied in the scenario of fast radio frequency channel switching. For example, the terminal needs to perform fast switching between two frequencies in one time slot, such as switching between 3.5 GHz and 2.1 GHz; for another example, in a super uplink (SU) scenario, the working frequency of a radio frequency channel of a terminal device needs to be constantly switched between 3.5 GHz and 2.1 GHz according to real-time signaling control. As described above, in this scenario, the pre-distortion coefficient LUT in the DPD core and the envelope tracking LUT in the ET power supply module need to be constantly switched between different working frequencies. Such switching will greatly increase the overall control load of the system, but if the switching is not performed, the working performance of the PA will be reduced.

[0006] Therefore, in the scenario of fast radio frequency channel switching, how to ensure that the PA can be quickly switched between different working frequencies while ensuring the working performance of the PA is a problem that needs to be solved. SUMMARY

[0007] The embodiments of the present application aim to provide a signal processing method and device to improve the working performance of the PA.

[0008] It should be understood that in the scheme provided by the embodiments of the present application, the communication device can be a wireless communication device, or a part of the wireless communication device, such as a system chip or a communication chip, or an integrated circuit product. The wireless communication device can be a computer device supporting wireless communication function.

[0009] Specifically, the wireless communication device can be a terminal such as a smartphone, or a wireless access network device such as a base station. The system chip can also be referred to as a system on chip (SoC), or simply SoC chip. The communication chip can include a baseband processing chip and a radio frequency processing chip. The baseband processing chip is also sometimes referred to as a modem or a baseband chip. The radio frequency processing chip is also sometimes referred to as a radio frequency transceiver or a radio frequency chip. In physical implementation, part or all of the chips in the communication chip can be integrated inside the SoC chip. For example, the baseband processing chip is integrated in the SoC chip, and the radio frequency processing chip is not integrated with the SoC chip.

[0010] In a first aspect, a communication apparatus is provided, comprising: a first power supply module and a first radio frequency transmitting channel; wherein the first radio frequency transmitting channel and the first power supply module are coupled with a first power amplifier (PA) respectively; when the first radio frequency transmitting channel works at a first bandwidth, the first radio frequency transmitting channel is configured to provide a signal processed by digital pre-distortion to the first PA, and the first power supply module is configured to provide a power supply voltage with a non-envelope waveform to the first PA; when the first radio frequency transmitting channel works at a second bandwidth, the first radio frequency transmitting channel is configured to provide a signal not processed by digital pre-distortion to the first PA, and the first power supply module is configured to provide a power supply voltage with an envelope waveform to the first PA.

[0011] Through the above scheme, when the first radio frequency transmitting channel switches between different bandwidths, in order to ensure fast switching of the bandwidth and reduce the nonlinear distortion of the output signal of the first radio frequency transmitting channel, different ways can be used to reduce the nonlinear distortion of the first PA when the first radio frequency transmitting channel works at different bandwidths. Specifically, the input signal of the first PA can be processed by digital pre-distortion when working at the first bandwidth, and the first PA can be provided with a power supply voltage with an envelope waveform when working at the second bandwidth. Since the LUT required for digital pre-distortion processing does not need to be adjusted, and the LUT required for generating the power supply voltage with an envelope waveform does not need to be adjusted when switching the bandwidth, fast switching of the bandwidth can be achieved, and the energy efficiency of the first PA can be ensured.

[0012] In a second aspect, a communication apparatus is provided, comprising: a first power supply module and a first radio frequency transmitting channel; wherein the first radio frequency transmitting channel and the first power supply module are coupled with a first power amplifier (PA) and a third PA respectively; when the first radio frequency transmitting channel works at a first bandwidth, the first radio frequency transmitting channel is configured to provide a signal processed by digital pre-distortion to the first PA, and the first power supply module is configured to provide a power voltage with a non-envelope waveform to the first PA; when the first radio frequency transmitting channel works at a second bandwidth, the first radio frequency transmitting channel is configured to provide a signal not processed by digital pre-distortion to the third PA, and the first power supply module is configured to provide a power voltage with an envelope waveform to the third PA.

[0013] By the above scheme, when the first radio frequency transmitting channel works at the first bandwidth, the radio frequency signal of the first radio frequency channel is processed by digital pre-distortion, which can reduce non-linear distortion; when the first radio frequency transmitting channel works at the second bandwidth, although the radio frequency signal of the first radio frequency channel is not processed by digital pre-distortion, the third PA for amplifying the output signal is powered by the power voltage with an envelope waveform, which can reduce non-linear distortion. In the above scheme, when the bandwidth is switched, the LUT required for digital pre-distortion processing does not need to be adjusted, and the LUT required for generating the power voltage with an envelope waveform does not need to be adjusted, so that the bandwidth can be quickly switched, and the non-linear distortion of the output signal of the first radio frequency transmitting channel can be reduced.

[0014] In a possible design, the apparatus further comprises a first digital pre-distortion (DPD) core; when the first radio frequency transmitting channel works at the first bandwidth, the first DPD core is configured to process the signal input to the first radio frequency transmitting channel by digital pre-distortion; when the first radio frequency transmitting channel works at the second bandwidth, the first DPD core is configured to bypass the input end of the first PA.

[0015] In the above scheme, the radio frequency channel linearization in the uplink high dynamic switching scenario can be realized with the lowest control overhead; and the DPD core does not need to store all the pre-distortion coefficient LUTs, so that the linearization performance of the system can be improved and the transmission efficiency of the system can be improved without increasing the internal storage space of the DPD core.

[0016] In a possible design, the first DPD core processes the signal input to the first radio frequency transmitting channel by digital pre-distortion using a pre-distortion coefficient lookup table (LUT) corresponding to the first bandwidth.

[0017] In a possible design, when the first radio frequency transmitting channel works at the second bandwidth, the first power supply module generates a power voltage provided for the first PA or the third PA by using an envelope tracking LUT corresponding to the second bandwidth.

[0018] In a possible design, the center frequency point of the first bandwidth is different from the center frequency point of the second bandwidth.

[0019] In a possible design, the center frequency point of the first bandwidth is 3.5 GHz, and the center frequency point of the second bandwidth is 2.1 GHz.

[0020] In a possible design, the apparatus further includes a second DPD core, a second radio frequency transmitting channel, and a second PA; when the second radio frequency transmitting channel works at the first bandwidth, the second DPD core is configured to perform digital pre-distortion processing on a signal input to the second radio frequency transmitting channel; and the second radio frequency transmitting channel is configured to provide the second PA with the signal subjected to the digital pre-distortion processing.

[0021] In a possible design, the apparatus further includes a second power supply module; the second power supply module is configured to provide the second PA with a power voltage, and a waveform of the power voltage provided by the second power supply module is an envelope waveform.

[0022] In the foregoing solution, the second PA is provided with the power voltage with the envelope waveform by the second power supply module, so that the non-linear distortion of the signal output by the second radio frequency transmitting channel can be further reduced, and the system efficiency can be improved.

[0023] In a possible design, the first bandwidth is greater than the second bandwidth.

[0024] In a possible design, the first PA is located in the communication apparatus.

[0025] In a possible design, the first power supply module is a power supply module using envelope tracking ET technology.

[0026] In a possible design, the second power supply module is a power supply module using envelope tracking ET technology.

[0027] In a third aspect, a method is provided for a communication device including a first power supply module and a first radio frequency transmitting channel, wherein the first radio frequency transmitting channel and the first power supply module are coupled with a first power amplifier (PA), respectively; the method includes: when the first radio frequency transmitting channel works at a first bandwidth, outputting a signal processed by digital pre-distortion to the first PA through the first radio frequency transmitting channel; wherein the first power supply module is configured to provide a non-envelope waveform power supply voltage to the first PA; when the first radio frequency transmitting channel works at a second bandwidth, providing a signal not processed by digital pre-distortion to the first PA through the first radio frequency transmitting channel; wherein the first power supply module is configured to provide an envelope waveform power supply voltage to the first PA.

[0028] In a fourth aspect, a method is provided for a communication device including a first power supply module and a first radio frequency transmitting channel, wherein the first radio frequency transmitting channel and the first power supply module are coupled with a first power amplifier (PA) and a third PA, respectively; the method includes: when the first radio frequency transmitting channel works at a first bandwidth, providing a signal processed by digital pre-distortion to the first PA through the first radio frequency transmitting channel; the first power supply module is configured to provide a non-envelope waveform power supply voltage to the first PA; when the first radio frequency transmitting channel works at a second bandwidth, the first radio frequency transmitting channel is configured to provide a signal not processed by digital pre-distortion to the third PA; the first power supply module is configured to provide an envelope waveform power supply voltage to the third PA.

[0029] In a possible design, the communication device further includes a first digital pre-distortion (DPD) core; when the first radio frequency transmitting channel works at the first bandwidth, the first DPD core performs digital pre-distortion processing on a signal input to the first radio frequency transmitting channel.

[0030] In a possible design, the first DPD core performs digital pre-distortion processing on the signal input to the first radio frequency transmitting channel by using a pre-distortion coefficient lookup table (LUT) corresponding to the first bandwidth.

[0031] In a possible design, the center frequency point of the first bandwidth is different from the center frequency point of the second bandwidth.

[0032] In a possible design, the center frequency point of the first bandwidth is 3.5 GHz; and the center frequency point of the second bandwidth is 2.1 GHz.

[0033] In a possible design, the communication apparatus further includes a second DPD core, a second radio frequency transmitting channel, and a second PA; when the second radio frequency transmitting channel operates at the first bandwidth, the second DPD core performs digital pre-distortion processing on a signal input to the second radio frequency transmitting channel; and the second radio frequency transmitting channel outputs the signal subjected to the digital pre-distortion processing to the second PA.

[0034] In a possible design, the communication apparatus further includes a second power supply module; the second power supply module provides a power supply voltage for the second PA, and the power supply voltage provided by the second power supply module is in an envelope waveform.

[0035] In a possible design, the first bandwidth is greater than the second bandwidth.

[0036] In a possible design, the first PA is located in the communication apparatus.

[0037] In a possible design, the first power supply module is a power supply module using envelope tracking (ET) technology.

[0038] In a possible design, the second power supply module is a power supply module using envelope tracking (ET) technology.

[0039] In a fifth aspect, a communication apparatus is provided, which includes a first power supply module, a first power amplifier (PA), and a first radio frequency transmitting channel; the first radio frequency transmitting channel and the first power supply module are coupled with the first PA respectively; when the first radio frequency transmitting channel operates at a first bandwidth, a power supply voltage of the first PA is in a non-envelope waveform; the first PA is configured to perform amplification processing on a first signal output by the first radio frequency transmitting channel, the first signal being a signal subjected to digital pre-distortion processing; when the first radio frequency transmitting channel operates at a second bandwidth, the first power supply module is configured to provide a power supply voltage for the first PA, and the power supply voltage provided by the first power supply module is in an envelope waveform; the first PA is configured to perform amplification processing on a second signal output by the first radio frequency transmitting channel, the second signal being a signal not subjected to digital pre-distortion processing; and the first bandwidth is greater than the second bandwidth.

[0040] In a sixth aspect, a communication apparatus is provided, which comprises a first power supply module, a first power amplifier (PA), a third PA, and a first radio frequency transmitting channel; the first radio frequency transmitting channel and the first power supply module are coupled with the first PA and the third PA respectively, and the first PA or the third PA is configured to amplify a signal output by the first radio frequency transmitting channel; when the first radio frequency transmitting channel operates in a first bandwidth, the third PA is configured to bypass the output end of the first radio frequency transmitting channel, and the first PA is configured to be connected with the output end of the first radio frequency transmitting channel; the power voltage of the first PA is in a non-envelope waveform; the first PA is configured to amplify a first signal output by the first radio frequency transmitting channel, and the first signal is a signal processed by digital pre-distortion; when the first radio frequency transmitting channel operates in a second bandwidth, the third PA is configured to be connected with the output end of the first radio frequency transmitting channel, and the first PA is configured to bypass the output end of the first radio frequency transmitting channel; the first power supply module is configured to provide power voltage for the third PA, and the power voltage provided by the first power supply module is in an envelope waveform; the third PA is configured to amplify a second signal output by the first radio frequency transmitting channel, and the second signal is a signal not processed by digital pre-distortion; and the first bandwidth is greater than the second bandwidth.

[0041] In a possible design, the apparatus further comprises a first digital pre-distortion (DPD) core; when the first radio frequency transmitting channel operates in the first bandwidth, the first DPD core is configured to perform digital pre-distortion processing on an input signal to obtain the first signal; and when the first radio frequency transmitting channel operates in the second bandwidth, the first DPD core is configured to bypass the input end of the first PA.

[0042] In a possible design, the first DPD core performs digital pre-distortion processing on the input signal by using a pre-distortion coefficient lookup table (LUT) corresponding to the first bandwidth.

[0043] In a possible design, the first power supply module generates the power voltage provided for the first PA by using an envelope tracking LUT corresponding to the second bandwidth.

[0044] In a possible design, the center frequency point of the first bandwidth is different from the center frequency point of the second bandwidth.

[0045] In a possible design, the center frequency point of the first bandwidth is 3.5 GHz, and the center frequency point of the second bandwidth is 2.1 GHz.

[0046] In a possible design, the apparatus further includes a second DPD core, a second radio frequency transmitting channel, and a second PA; when the second radio frequency transmitting channel operates at the first bandwidth, the second DPD core is configured to perform digital pre-distortion processing on a signal input to the second radio frequency transmitting channel; and the second PA is configured to perform amplification processing on the signal that has undergone the digital pre-distortion processing of the second DPD core.

[0047] In a possible design, the apparatus further includes a second power supply module; the second power supply module is configured to provide a power supply voltage for the second PA, and the power supply voltage provided by the second power supply module has an envelope waveform.

[0048] In a possible design, the first power supply module is a power supply module that adopts envelope tracking (ET) technology.

[0049] In a possible design, the second power supply module is a power supply module that adopts envelope tracking (ET) technology.

[0050] In a seventh aspect, a method is provided, which is applied to a communication apparatus including a first power supply module and a first radio frequency transmitting channel, wherein the first radio frequency transmitting channel and the first power supply module are coupled with a first PA respectively, the first PA is configured to perform amplification processing on a signal output by the first radio frequency transmitting channel, and the method includes the following steps.

[0051] when the first radio frequency transmitting channel operates at the first bandwidth, performing amplification processing on a first signal output by the first radio frequency transmitting channel through the first PA; the first signal is a signal that has undergone digital pre-distortion processing, and a power supply voltage of the first PA has a non-envelope waveform; and when the first radio frequency transmitting channel operates at the second bandwidth, performing amplification processing on a second signal output by the first radio frequency transmitting channel through the first PA; the second signal is a signal that has not undergone digital pre-distortion processing, the power supply voltage of the first PA is provided by the first power supply module, and the power supply voltage provided by the first power supply module has an envelope waveform; and the first bandwidth is greater than the second bandwidth.

[0052] In an eighth aspect, a method is provided for a communication device including a first power supply module, a first power amplifier (PA), a third PA, and a first radio frequency (RF) transmit channel, wherein the first RF transmit channel and the first power supply module are coupled to the first PA and the third PA respectively, and the first PA or the third PA is configured to amplify a signal output by the first RF transmit channel; the method includes: when the first RF transmit channel operates in a first bandwidth, the third PA is configured to bypass the output end of the first RF transmit channel, and the first PA is configured to be connected to the output end of the first RF transmit channel; amplifying a first signal output by the first RF transmit channel by the first PA; wherein the first signal is a signal processed by digital pre-distortion, and a power supply voltage of the first PA has a non-envelope waveform; when the first RF transmit channel operates in a second bandwidth, the third PA is configured to be connected to the output end of the first RF transmit channel, and the first PA is configured to bypass the output end of the first RF transmit channel; amplifying a second signal output by the first RF transmit channel by the third PA; wherein the second signal is a signal not processed by digital pre-distortion, a power supply voltage of the third PA is provided by the first power supply module, and the power supply voltage provided by the first power supply module has an envelope waveform; and the first bandwidth is greater than the second bandwidth.

[0053] In a possible design, before the amplifying the first signal by the first PA, the method further includes: performing digital pre-distortion processing on a signal input to the first RF transmit channel by a first digital pre-distortion (DPD) core to obtain the first signal.

[0054] In a possible design, before the amplifying the second signal by the first PA, the method further includes: configuring a first digital pre-distortion (DPD) core to bypass the input end of the first PA.

[0055] In a possible design, the center frequency point of the first bandwidth is different from the center frequency point of the second bandwidth.

[0056] In a possible design, the center frequency point of the first bandwidth is 3.5 GHz, and the center frequency point of the second bandwidth is 2.1 GHz.

[0057] In a possible design, the communication apparatus further includes a second DPD core, and a second radio frequency transmitting channel including a second PA; and the method further includes: when the second radio frequency transmitting channel operates in the first bandwidth, performing digital pre-distortion processing on a signal input to the second radio frequency transmitting channel by using the second DPD core; and performing amplification processing on the signal input to the second radio frequency transmitting channel by using the second PA.

[0058] In a possible design, the communication apparatus further includes a second power supply module, and the method further includes: providing a power supply voltage for the second PA by using the second power supply module, and the power supply voltage provided by the second power supply module is in an envelope waveform.

[0059] In a possible design, the first power supply module is a power supply module using envelope tracking (ET) technology.

[0060] In a possible design, the second power supply module is a power supply module using envelope tracking (ET) technology.

[0061] The application also provides a communication apparatus, including: a processor and a memory; the memory is configured to store program instructions; and the processor is configured to execute the program instructions stored in the memory, so as to implement any possible method in the third aspect or the fourth aspect.

[0062] The application also provides a communication apparatus, including: a processor and an interface circuit; the interface circuit is configured to access a memory, and the memory stores program instructions; and the processor is configured to access the memory by using the interface circuit, and execute the program instructions stored in the memory, so as to implement any possible method in the third aspect or the fourth aspect.

[0063] The application provides a computer readable storage medium, and the computer readable storage medium stores computer readable instructions; when a computer reads and executes the computer readable instructions, the communication apparatus executes the method in any possible design described above.

[0064] The application provides a computer program product, and when a computer reads and executes the computer program product, the communication apparatus executes the method in any possible design described above.

[0065] The application provides a chip, which is connected with a memory and is configured to read and execute a software program stored in the memory, so as to implement the method in any possible design described above. BRIEF DESCRIPTION OF DRAWINGS

[0066] Figure 1 FIG. 1 is a schematic diagram of a pre-distortion coefficient LUT switching in the prior art;

[0067] Figure 2 A structure schematic diagram of a wireless communication system provided by an embodiment of the present application is provided.

[0068] Figure 3 A structure schematic diagram of a communication device provided by an embodiment of the present application is provided.

[0069] Figure 4 Another structure schematic diagram of a communication device provided by an embodiment of the present application is provided.

[0070] Figure 5 A structure schematic diagram of a radio frequency channel provided by an embodiment of the present application is provided.

[0071] Figure 6 Another structure schematic diagram of a radio frequency channel provided by an embodiment of the present application is provided.

[0072] Figure 7 Another structure schematic diagram of a radio frequency channel provided by an embodiment of the present application is provided.

[0073] Figure 8 A voltage waveform schematic diagram provided by an embodiment of the present application is provided.

[0074] Figure 9 Another voltage waveform schematic diagram provided by an embodiment of the present application is provided.

[0075] Figure 10 A signal processing flow schematic diagram provided by an embodiment of the present application is provided.

[0076] Figure 11 A signal processing flow schematic diagram provided by an embodiment of the present application is provided. DETAILED DESCRIPTION

[0077] The embodiments of the present application will be described in further detail below with reference to the drawings.

[0078] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example, a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD), a 5th Generation (5G) system or a New Radio (NR), etc., without limitation.

[0079] The technical solutions provided by the present application are further described below in combination with the drawings and examples. It should be understood that the system structure and service scenarios provided in the examples of the present application are mainly to explain some possible implementation manners of the technical solutions of the present application, and should not be interpreted as the only limitation of the technical solutions of the present application. Those skilled in the art can know that as the system evolves and new service scenarios appear, the technical solutions provided by the present application can still be applicable to the same or similar technical problems.

[0080] It should be understood that the technical solutions provided by the examples of the present application, in the introduction of the following specific examples, some repeated places may not be described again, but should be regarded as having mutual reference between these specific examples, and can be combined with each other.

[0081] In a wireless communication system, devices can be divided into devices providing wireless network services and devices using wireless network services. The devices providing wireless network services are those devices that make up the wireless communication network, which can be referred to as network devices or network elements. Network devices are usually attributed to operators or infrastructure providers, and are responsible for operation or maintenance by these manufacturers. Network devices can be further divided into radio access network (RAN) devices and core network (CN) devices. Typical RAN devices include base stations (BS).

[0082] It should be understood that the base station can also be referred to as a wireless access point (AP) or a transmission reception point (TRP). Specifically, the base station can be a general node B (gNB) in a 5G new radio (NR) system, an evolutional node B (eNB) in a 4G long term evolution (LTE) system. According to the physical form or the transmission power of the base station, the base station can be divided into a macro base station or a micro base station. The micro base station is sometimes also referred to as a small base station or a small cell.

[0083] A device using wireless network service can be simply referred to as a terminal. The terminal is capable of establishing a connection with a network device and providing specific wireless communication services for a user based on the services of the network device. It should be understood that the terminal is also sometimes referred to as a user equipment (UE) or a subscriber unit (SU) due to its closer relationship with the user. In addition, the terminal is often referred to as a mobile station (MS) because it is often moved with the user, in contrast to the base station which is usually placed at a fixed location. In addition, some network devices, such as a relay node (RN) or a wireless router, can also be considered as a terminal because they have the identity of a UE or belong to a user.

[0084] Specifically, the terminal can be a mobile phone, a tablet computer, a laptop computer, a wearable device (such as a smart watch, a smart bracelet, a smart helmet, and smart glasses), and other devices with wireless access capabilities, such as a smart car, various internet of thing (IOT) devices, including various smart home devices (such as a smart meter and a smart home appliance) and smart city devices (such as a security or monitoring device and a smart road traffic facility).

[0085] For ease of expression, the base station and the terminal will be taken as examples in this application to explain the technical solutions of the embodiments of the present application in detail.

[0086] Figure 2 A structure diagram of a wireless communication system is provided for the embodiments of the present application. As shown in Figure 2 The wireless communication system includes a terminal and a base station. According to the different transmission directions, the transmission link from the terminal to the base station is referred to as an uplink (UL), and the transmission link from the base station to the terminal is referred to as a downlink (DL). Similarly, the data transmission in the uplink can be simply referred to as uplink data transmission or uplink transmission, and the data transmission in the downlink can be simply referred to as downlink data transmission or downlink transmission.

[0087] In the wireless communication system, a base station can provide communication coverage for a particular geographic area through the use of one or more antenna devices, which can be integrated or external to the base station. One or more terminals can access the base station within the coverage area of the base station. A base station can manage one or more cells. Each cell has an identity, which is also referred to as a cell identity (cell ID). From the perspective of wireless resources, a cell is a combination of downlink wireless resources and, optionally, paired uplink wireless resources.

[0088] It should be understood that the wireless communication system can comply with the wireless communication standards of the third generation partnership project (3GPP), or other wireless communication standards, such as the wireless communication standards of the Institute of Electrical and Electronics Engineers (IEEE) 802 series (e.g., 802.11, 802.15, or 802.20). Figure 2 Although only one base station and one terminal are shown, the wireless communication system can include other numbers of terminals and base stations. In addition, the wireless communication system can include other network devices, such as core network devices, which are not enumerated one by one here.

[0089] The terminal and the base station should be aware of the pre-defined configurations of the wireless communication system, including the radio access technologies (RATs) supported by the system and the wireless resource configurations specified by the system, such as the basic configurations of radio frequency bands and carriers. A carrier is a frequency range that complies with the system specification. The frequency range can be determined by a carrier center frequency (denoted as a carrier frequency) and a carrier bandwidth. These system pre-defined configurations can be part of the standard protocol of the wireless communication system, or determined through the interaction between the terminal and the base station. The content of the relevant standard protocol can be pre-stored in the memory of the terminal and the base station, or embodied as hardware circuitry or software code of the terminal and the base station.

[0090] In the wireless communication system, the terminal and the base station support one or more same RATs, such as 5G NR, 4G LTE, or the RAT of a future evolved system. Specifically, the terminal and the base station use the same air interface parameters, coding schemes, and modulation schemes, and communicate with each other based on the wireless resources specified by the system.

[0091] Figure 3 A structural schematic diagram of a communication apparatus is provided for an embodiment of the present application. The communication apparatus can be a terminal or a base station in an embodiment of the present application. As shown in FIG. 1, the communication apparatus can include a processor 100, a memory 101, and a communication interface 102.Figure 3 As shown, the communication device can include a plurality of components, such as: an application subsystem, a memory, a massive storage, a baseband subsystem, a radio frequency integrated circuit (RFIC), a radio frequency front end (RFFE) device, and an antenna (ANT). These components can be coupled through various interconnection buses or other electrical connections.

[0092] Figure 3 In the figure, ANT_1 represents a first antenna, ANT_N represents an Nth antenna, N is a positive integer greater than 1. Tx represents a transmission path, Rx represents a reception path, and different numbers represent different paths. Each path can represent a signal processing channel. Among them, FBRx represents a feedback reception path, PRx represents a main reception path, and DRx represents a diversity reception path. HB represents high frequency, LB represents low frequency, both referring to the relative high and low of the frequency. BB represents baseband. It should be understood that, Figure 3 The labels and components in the figure are for illustrative purposes only, and only as one possible implementation, and embodiments of the present application also include other implementations. For example, the communication device can include more or fewer paths, including more or fewer components.

[0093] Among them, the application subsystem can serve as the main control system or main computing system of the communication device, used to run the main operating system and application programs, manage the software and hardware resources of the entire communication device, and can provide a user operation interface for the user. In addition, the application subsystem can also include driving software related to other subsystems (such as the baseband subsystem).

[0094] The application subsystem can include one or more processors. The plurality of processors can be a plurality of same type of processors, or can include a combination of a plurality of types of processors. In this application, the processor can be a general-purpose processor, or can be a processor designed for a specific field. For example, the processor can be a central processing unit (CPU), a digital signal processor (DSP), or a micro control unit (MCU). The processor can also be a graphics processing unit (GPU), an image signal processor (ISP), an audio signal processor (ASP), and an AI processor specially designed for artificial intelligence (AI) applications. The AI processor includes but is not limited to a neural network processing unit (NPU), a tensor processing unit (TPU), and a processor known as an AI engine.

[0095] Figure 3 In the middle, the radio frequency integrated circuit (including RFIC 1, and one or more optional RFIC 2) and the radio frequency front-end device can jointly constitute a radio frequency subsystem. According to the difference of the receiving or transmitting path of the signal, the radio frequency subsystem can also be divided into a radio frequency receiving channel (RF receive path) and a radio frequency transmitting channel (RF transmit path). Among them, the radio frequency receiving channel can receive the radio frequency signal through the antenna, process (such as amplification, filtering and down-conversion) the radio frequency signal to obtain the baseband signal, and deliver it to the baseband subsystem. The radio frequency transmitting channel can receive the baseband signal from the baseband subsystem, process (such as up-conversion, amplification and filtering) the baseband signal to obtain the radio frequency signal, and finally radiate the radio frequency signal to the space through the antenna. The radio frequency integrated circuit can be referred to as a radio frequency processing chip or a radio frequency chip.

[0096] Specifically, the radio frequency subsystem can include antenna switches, antenna tuners, low noise amplifiers (LNAs), power amplifiers (PAs), mixers, local oscillators (LOs), filters, and other electronic devices, which can be integrated into one or more chips as needed. The radio frequency integrated circuit can be referred to as a radio frequency processing chip or a radio frequency chip. The radio frequency front-end device can also be a separate chip. The radio frequency chip is sometimes also referred to as a receiver, a transmitter, or a transceiver. With the evolution of technology, the antenna can also be considered as part of the radio frequency subsystem at times and can be integrated into the chip of the radio frequency subsystem. The antenna, the radio frequency front-end device, and the radio frequency chip can all be manufactured and sold separately. Of course, the radio frequency subsystem can also use different devices or different integration methods based on the power consumption and performance requirements. For example, the radio frequency chip can be referred to as a radio frequency antenna module or an antenna module, which integrates some of the devices belonging to the radio frequency front-end, or even integrates the antenna and the radio frequency front-end device.

[0097] Similar to the radio frequency subsystem mainly completing the processing of radio frequency signals, the baseband subsystem, as its name implies, mainly completes the processing of baseband signals. The baseband subsystem can extract useful information or data bits from the baseband signals, or convert the information or data bits into baseband signals to be sent. These information or data bits can be data representing user data or control information such as voice, text, video, etc. For example, the baseband subsystem can implement signal processing operations such as modulation and demodulation, encoding and decoding, etc. For different wireless access technologies, such as 5G NR and 4G LTE, the baseband signal processing operations are also not exactly the same.

[0098] In addition, since the radio frequency signal is usually an analog signal, the signal processed by the baseband subsystem is mainly a digital signal, and there also needs to be an analog-to-digital conversion device in the communication device. In the embodiments of the present application, the analog-to-digital conversion device can be arranged in the baseband subsystem or in the radio frequency subsystem. The analog-to-digital conversion device includes an analog-to-digital converter (ADC) for converting an analog signal into a digital signal, and a digital-to-analog converter (DAC) for converting a digital signal into an analog signal.

[0099] Similar to the application subsystem, the baseband subsystem can also include one or more processors. In addition, the baseband subsystem can also include one or more hardware accelerators (HACs). Hardware accelerators can be used to perform some sub-functions that are computationally expensive, such as assembly and parsing of data packets, encryption and decryption of data packets, etc. These sub-functions can also be implemented using general-purpose processors, but hardware accelerators can be more appropriate due to performance or cost considerations. In a specific implementation, hardware accelerators are mainly implemented using application-specific integrated circuits (ASICs). Of course, hardware accelerators can also include one or more relatively simple processors, such as MCUs.

[0100] In the embodiments of the present application, the baseband subsystem and the radio frequency subsystem together constitute a communication subsystem, which provides wireless communication functions for the communication device. Generally, the baseband subsystem is responsible for managing the software and hardware resources of the communication subsystem, and can configure the operating parameters of the radio frequency subsystem. The processor of the baseband subsystem can run a sub-operating system of the communication subsystem, which is often an embedded operating system or a real-time operating system, such as the VxWorks operating system or the QuRT system of Qualcomm.

[0101] The baseband subsystem can be integrated into one or more chips, which can be referred to as baseband processing chips or baseband chips. The baseband subsystem can be a standalone chip, which can be referred to as a modem or a modem chip. The baseband subsystem can be manufactured and sold in units of modem chips. The modem chip is sometimes also referred to as a baseband processor or a mobile processor. In addition, the baseband subsystem can be further integrated in a larger chip, which can be manufactured and sold in units of larger chips. This larger chip can be referred to as a system chip, a chip system, or a system on a chip (SoC), or simply an SoC chip. The software components of the baseband subsystem can be built into the hardware components of the chip before the chip is shipped, or can be imported into the hardware components of the chip from other non-volatile memories after the chip is shipped, or can also be downloaded and updated in an online manner through a network.

[0102] In addition, the communication device also includes a memory, for example Figure 3The memory and the mass storage in the communication device can be implemented by using one or more volatile memories and one or more non-volatile memories. In addition, one or more caches can be further included in the application subsystem and the baseband subsystem, respectively. In a specific implementation, the memory can be divided into a volatile memory and a non-volatile memory (NVM). The volatile memory refers to a memory in which the data stored therein will be lost when the power supply is interrupted. At present, the volatile memory mainly refers to a random access memory (RAM), including a static RAM (SRAM) and a dynamic RAM (DRAM). The non-volatile memory refers to a memory in which the data stored therein will not be lost when the power supply is interrupted. Common non-volatile memories include a read only memory (ROM), an optical disk, a magnetic disk, and various memories based on a flash memory technology, etc. Generally, the memory and the cache can be selected from the volatile memory, and the mass storage can be selected from the non-volatile memory, for example, a flash memory.

[0103] Figure 4 Another structural schematic diagram of a communication device provided by an embodiment of the present application is shown. Figure 4 Some common devices for processing radio frequency signals in the communication device are shown. It should be understood that, Figure 4 Although only one radio frequency receiving channel and one radio frequency transmitting channel are shown in the communication device, the communication device in the embodiment of the present application is not limited thereto, and the communication device can include one or more radio frequency receiving channels and one or more radio frequency transmitting channels. The radio frequency transmitting channel can include a digital to analog converter (DAC) and a mixer, etc. The output signal of the radio frequency transmitting channel is further processed by a PA and a filter, etc. before being transmitted by the antenna. The radio frequency receiving channel can include a mixer, a filter, and an analog to digital converter (ADC), etc. The antenna receiving signal of the radio frequency receiving channel can be further processed by a low noise amplifier (LNA), etc. Figure 4 Only examples are shown, and the modules included in the radio frequency receiving channel and the radio frequency transmitting channel are not listed one by one in the embodiment of the present application.

[0104] It should be noted that the ET power module and the DPD core can be located in the radio frequency transmitting channel or outside the radio frequency transmitting channel.

[0105] Embodiment one:

[0106] As shown in the foregoing description, Figure 5 is a structural schematic diagram of a communication device applicable to the embodiments of the present application.

[0107] Referring to Figure 5 , the communication device at least includes two radio frequency transmitting channels: a first radio frequency transmitting channel 501 and a second radio frequency transmitting channel 502, the first radio frequency transmitting channel 501 including modules such as mixers and DACs, and the second radio frequency transmitting channel 502 including modules such as mixers and DACs.

[0108] In actual applications, Figure 5 , the communication device shown in the foregoing description can be an RFIC, Figure 5 The communication device can also be externally connected to other modules to realize the transmission and reception of radio frequency signals. For example, Figure 5 , the output end of the first radio frequency transmitting channel 501 is connected to a first PA 5011, and the second radio frequency transmitting channel 502 is connected to a second PA 5021. The first PA 5011 can be located in the first radio frequency transmitting channel 501 or can be independent of the first radio frequency transmitting channel 501; correspondingly, the second PA 5021 can be located in the second radio frequency transmitting channel 502 or can be independent of the second radio frequency transmitting channel 502.

[0109] In the embodiments of the present application, the first PA 5011 needs to be powered by an external power supply to work when amplifying signals, and the voltage input end of the first PA 5011 can also be connected to a first power module 503, that is, the first power module 503 provides a power voltage for the first PA 5011. Figure 5 The foregoing description also includes other modules, such as a first DPD core 504 corresponding to the first radio frequency transmitting channel, a second DPD core 505 corresponding to the second radio frequency transmitting channel, and the like, which will not be listed one by one here.

[0110] In the embodiments of the present application, the bandwidth of the first radio frequency transmitting channel 501 works in the first bandwidth and the second bandwidth, and the bandwidth of the second radio frequency transmitting channel 502 works in the first bandwidth. Wherein, the first bandwidth is not equal to the second bandwidth, for example, the first bandwidth can be greater than the second bandwidth.

[0111] For example, the center frequency point of the first bandwidth is different from the center frequency point of the second bandwidth, for example, the center frequency point of the first bandwidth is 3.5 GHz; and the center frequency point of the second bandwidth is 2.1 GHz. Of course, the above is only an example, and the specific values of the center frequency point of the first bandwidth and the center frequency point of the second bandwidth can be determined according to actual conditions, which will not be listed one by one here.

[0112] It should be noted that the first radio frequency transmitting channel 501 can perform bandwidth switching when a control instruction of performing bandwidth switching is received. The specific format of the control instruction is not limited in the embodiments of the present application.

[0113] For example, the communication device is applied in a super uplink (SU) scenario. The first radio frequency transmitting channel 501 can continuously perform fast switching between a bandwidth with a center frequency of 3.5 GHz and a bandwidth with a center frequency of 2.1 GHz according to the control instruction.

[0114] According to the foregoing description, in the embodiments of the present application, when the first radio frequency transmitting channel 501 performs switching between different bandwidths, the first PA 5011 can be compensated by different ways, so that it is not necessary to load the pre-distortion coefficient LUT corresponding to different bandwidths in the first DPD core 504 each time the bandwidth is switched, thereby reducing the switching delay and improving the working efficiency of the PA and the linearity of the system. The specific content of the pre-distortion coefficient LUT can refer to the description in the prior art, and the specific implementation manner of the pre-distortion coefficient LUT is not limited in the embodiments of the present application.

[0115] Specifically, in combination with the foregoing description, Figure 5 In the embodiments of the present application, when the first radio frequency transmitting channel 501 works in the first bandwidth, the first DPD core 504 can output the signal processed by digital pre-distortion to the first radio frequency transmitting channel 501, and the first radio frequency transmitting channel 501 processes the received signal and outputs the first signal. That is, the first signal output by the first radio frequency transmitting channel 501 is the signal processed by digital pre-distortion.

[0116] It should be noted that the first DPD core 504 can pre-store the pre-distortion coefficient LUT corresponding to the first bandwidth. When the first radio frequency transmitting channel 501 works in the first bandwidth, the pre-distortion coefficient LUT corresponding to the first bandwidth is used to perform digital pre-distortion processing on the input signal.

[0117] When the first radio frequency transmitting channel 501 works in the first bandwidth, the first radio frequency transmitting channel 501 is configured to provide the first PA 5011 with the signal processed by digital pre-distortion.

[0118] The first PA 5011 is configured to amplify the signal output by the first radio frequency transmitting channel 501, that is, to amplify the first signal.

[0119] Further, the first power supply module 503 is configured to provide the first PA with a power supply voltage in a non-envelope waveform, i.e., the waveform of the power supply voltage of the first PA 5011 is in a non-envelope waveform. For example, in this case, the first power supply module 503 can output a fixed voltage to power the first PA 5011, at which time the waveform of the power supply voltage of the first PA 5011 is a straight line, and the fixed voltage can be the rated power supply voltage of the first PA 5011. Alternatively, the first power supply module 503 can also use the average power tracking (APT) method to power the first PA 5011, at which time the power supply voltage of the first PA 5011 jumps between multiple voltages at different time periods, such as from 3V to 5V, and from 5V to 4V, etc., which is determined according to actual conditions.

[0120] When the first radio frequency transmitting channel 501 works in the second bandwidth, the first radio frequency transmitting channel is configured to provide the first PA with a signal that has not been subjected to digital pre-distortion processing. Specifically, the first DPD core 504 is configured to bypass the input end of the first PA 5011 and no longer perform digital pre-distortion processing on the radio frequency signal input into the first radio frequency transmitting channel 501. At this time, the signal input into the first radio frequency transmitting channel 501 is no longer subjected to the processing of the first DPD core 504, that is, the second signal input into the first PA 5011 is a signal that has not been subjected to digital pre-distortion processing.

[0121] In this case, the first power supply module 503 is configured to provide the first PA 503 with a power supply voltage in an envelope waveform, and the waveform of the power supply voltage provided by the first power supply module 503 is in an envelope waveform; and the first PA 5011 is configured to amplify the signal output by the first radio frequency transmitting channel 501, i.e., to amplify the second signal.

[0122] It should be noted that the first power supply module 503 can provide a voltage in an envelope waveform because the first power supply module 503 uses the envelope tracking (ET) technology to generate the supply voltage. Specifically, the first power supply module 503 can pre-store an envelope tracking LUT corresponding to the first bandwidth, and when the first radio frequency transmitting channel 501 works in the second bandwidth, the first power supply module 503 can use the envelope tracking LUT corresponding to the second bandwidth to generate the power supply voltage provided for the first PA 5011.

[0123] The specific content of the envelope tracking LUT can be referred to the description in the prior art, and the specific implementation mode of the envelope tracking LUT is not limited in the embodiments of the present application.

[0124] Further, in the embodiment of the present application, when the second radio frequency transmitting channel 502 works at the first bandwidth, the second DPD core 505 in the second radio frequency transmitting channel 502 can be used for performing digital pre-distortion processing on the input signal. Wherein, the second DPD core 505 can pre-store the pre-distortion coefficient LUT corresponding to the first bandwidth, so as to perform digital pre-distortion processing on the input signal by using the pre-distortion coefficient LUT corresponding to the first bandwidth.

[0125] Correspondingly, the second PA 5021 in the second radio frequency transmitting channel 502 can be used for amplifying the signal after the digital pre-distortion processing of the second DPD core 505.

[0126] Wherein, the second PA 5021 can be supplied with a fixed voltage, such as a rated power supply voltage of the second PA 5021, or can be supplied with an APT technology, or can be supplied with an ET technology.

[0127] Through the above scheme, when the first radio frequency transmitting channel switches between different bandwidths, in order to ensure the rapid switching of the bandwidth and reduce the nonlinear distortion of the first PA in the first radio frequency transmitting channel, different ways can be used to reduce the nonlinear distortion of the first PA when the first radio frequency transmitting channel works at different bandwidths. Specifically, the input signal of the first PA can be digitally pre-distorted when working at the first bandwidth, and the envelope waveform power supply voltage can be provided for the first PA when working at the second bandwidth. Since the LUT required for digital pre-distortion processing does not need to be adjusted, and the LUT required for generating the envelope waveform power supply voltage does not need to be adjusted when the bandwidth is switched, the rapid switching of the bandwidth can be realized, and the energy efficiency of the first PA can be ensured. In the above scheme, the radio frequency channel linearization in the uplink high dynamic switching scenario can be realized with the lowest control overhead; and the DPD core does not need to store all the pre-distortion coefficient LUT, and the ET power supply module does not need to store all the envelope tracking LUT, so that the linearization performance of the system can be improved and the transmission efficiency of the system can be improved without increasing the internal storage space of the DPD core and the ET power supply module.

[0128] Embodiment two:

[0129] Figure 5 Wherein, the output end of the first radio frequency transmitting channel 501 is connected with a PA, and in the embodiment of the present application, the output end of the first radio frequency transmitting channel 501 can also be selectively connected with two PAs. For details, please refer to Figure 6 . Figure 6 and Figure 5The structure is similar, and the difference is that the output end of the first radio frequency transmitting channel 501 is coupled with the first PA 5011 and the third PA 5012. The voltage input end of the third PA 5012 is connected with the output end of the first power supply module 503.

[0130] The first power supply module 503 can be a set of multiple power supply modules or an independent power supply module. When the first power supply module 503 is a set of multiple power supply modules, it can be a set of power supply modules capable of providing envelope waveform power supply voltage and power supply modules capable of providing non-envelope waveform power supply voltage.

[0131] Specifically, when the first radio frequency transmitting channel 501 works in the first bandwidth, the first radio frequency transmitting channel 501 is configured to provide the first PA 5011 with a signal processed by digital pre-distortion, the first power supply module 503 is configured to provide the first PA with a non-envelope waveform power supply voltage, the third PA 5012 is configured to bypass the output end of the first radio frequency transmitting channel 501, the first PA 5011 is configured to be connected with the output end of the first radio frequency transmitting channel 501, the waveform of the power supply voltage of the first PA 5011 is a non-envelope waveform, and the first PA 5011 is configured to amplify the first signal output by the first radio frequency transmitting channel 501, wherein the first signal is a signal processed by digital pre-distortion.

[0132] When the first radio frequency transmitting channel 501 works in the second bandwidth, the first radio frequency transmitting channel is configured to provide the third PA with a signal not processed by digital pre-distortion, the third PA 5012 is configured to be connected with the output end of the first radio frequency transmitting channel 501, the first PA 5011 is configured to bypass the output end of the first radio frequency transmitting channel, the first power supply module 503 is configured to provide the third PA 5012 with a power supply voltage, the waveform of the power supply voltage provided by the first power supply module is an envelope waveform, and the third PA 5012 is configured to amplify the second signal output by the first radio frequency transmitting channel 501, wherein the second signal is a signal not processed by digital pre-distortion.

[0133] By the above scheme, when the first radio frequency transmitting channel works at the first bandwidth, the radio frequency signal of the first radio frequency transmitting channel is processed by digital pre-distortion, which can reduce the nonlinear distortion; when the first radio frequency transmitting channel works at the second bandwidth, although the radio frequency signal of the first radio frequency transmitting channel is not processed by digital pre-distortion, the third PA for amplifying the output signal is powered by the envelope waveform power supply voltage, so as to reduce the nonlinear distortion. In the above scheme, since the LUT required for digital pre-distortion processing does not need to be adjusted and the LUT required for generating the envelope waveform power supply voltage does not need to be adjusted when the bandwidth is switched, the rapid switching of the bandwidth can be realized, and the nonlinear distortion of the output signal of the first radio frequency transmitting channel can be reduced.

[0134] Embodiment three:

[0135] In combination with the foregoing description, in combination with Figure 6 As Figure 7 shown, the second PA 5021 needs external power supply to work when amplifying the signal, and the voltage input end of the second PA 5021 can also be connected with the second power module 506, that is, the second power module 506 provides the power voltage for the second PA 5021. The waveform of the power voltage provided by the second power module 506 is an envelope waveform.

[0136] It should be noted that the second power module 506 can provide the envelope waveform voltage because the second power module 506 can generate the power supply voltage by using the ET technology.

[0137] Specifically, the second power module 506 can pre-store the envelope tracking LUT corresponding to the first bandwidth, and when the second radio frequency transmitting channel 502 works at the first bandwidth, the second power module 506 can generate the power voltage provided for the second PA 5021 by using the envelope tracking LUT corresponding to the first bandwidth.

[0138] The foregoing embodiments describe how to process the output signal of the first radio frequency transmitting channel 501 when the first radio frequency transmitting channel 501 works at different bandwidths. Further, in combination with the foregoing description, when the first radio frequency transmitting channel 501 works at the first bandwidth, the voltage waveform input at the voltage input end of the first PA 5011 is a straight line, that is, the input voltage is a fixed voltage, for example, 5V; when the first radio frequency transmitting channel 501 works at the second bandwidth, the voltage waveform input at the voltage input end of the first PA 5011 or the third PA 5012 is an envelope waveform, that is, the input voltage is constantly changing, which can be referred to Figure 8 .

[0139] Figure 8 In the foregoing embodiments, the voltage waveform input at the voltage input end of the second PA 5021 is also described.Figure 8 The voltage inputted by the voltage input end of the second PA 5021 is fixed voltage as an example for description. When the second power supply module 506 provides the power supply voltage for the second PA 5021, the voltage inputted by the voltage input end of the second PA 5021 can refer to Figure 9 as shown.

[0140] It can be known from Figure 8 and Figure 9 that the voltage waveform inputted by the voltage input end of the first PA 5011 is switched between the fixed voltage and the envelope waveform along with the bandwidth switching of the first radio frequency transmitting channel 501. The voltage waveform inputted by the voltage input end of the second PA 5021 is a straight line in Figure 8 and is an envelope waveform in Figure 9 .

[0141] Figure 10 A flowchart of a signal processing method provided by an embodiment of the present application is shown. The method can be implemented by a communication device including the first power supply module, the first PA, the third PA and the first radio frequency transmitting channel in the foregoing technical solutions. The communication device can be a terminal or a base station. As Figure 10 shown, the method can include the following steps.

[0142] Step 1001: when the first radio frequency transmitting channel works at a first bandwidth, amplifying and processing a first signal outputted by the first radio frequency transmitting channel through a first PA.

[0143] The third PA is configured to bypass the output end of the first radio frequency transmitting channel, and the first PA is configured to be connected with the output end of the first radio frequency transmitting channel. The first signal is a signal processed by digital pre-distortion, and the waveform of the power supply voltage of the first PA is a non-envelope waveform.

[0144] Step 1002: when the first radio frequency transmitting channel works at a second bandwidth, amplifying and processing a second signal outputted by the first radio frequency transmitting channel through a third PA.

[0145] The third PA is configured to be connected with the output end of the first radio frequency transmitting channel, and the first PA is configured to bypass the output end of the first radio frequency transmitting channel. The second signal is a signal not processed by digital pre-distortion, and the power supply voltage of the third PA is provided by the first power supply module. The waveform of the power supply voltage provided by the first power supply module is an envelope waveform. The first bandwidth is greater than the second bandwidth.

[0146] In an optional implementation, before the first signal is amplified by the first PA, the method further includes: performing digital pre-distortion processing on a signal input to the first radio frequency transmitting channel by a first digital pre-distortion (DPD) core to obtain the first signal.

[0147] In an optional implementation, before the second signal is amplified by the first PA, the method further includes: configuring a first digital pre-distortion (DPD) core to bypass an input end of the first PA.

[0148] In an optional implementation, the center frequency point of the first bandwidth is different from the center frequency point of the second bandwidth.

[0149] In an optional implementation, the center frequency point of the first bandwidth is 3.5 GHz, and the center frequency point of the second bandwidth is 2.1 GHz.

[0150] In an optional implementation, the communication apparatus further includes a second DPD core and a second radio frequency transmitting channel, the second radio frequency transmitting channel includes a second PA; the method further includes: when the second radio frequency transmitting channel works in the first bandwidth, performing digital pre-distortion processing on a signal input to the second radio frequency transmitting channel by the second DPD core; and amplifying the signal processed by the second DPD core by the second PA.

[0151] In an optional implementation, the communication apparatus further includes a second power supply module, and the method further includes: providing a power supply voltage for the second PA by the second power supply module, and the power supply voltage provided by the second power supply module is in an envelope waveform.

[0152] In a possible design, the first power supply module is a power supply module using envelope tracking (ET) technology.

[0153] In a possible design, the second power supply module is a power supply module using envelope tracking (ET) technology.

[0154] Figure 11 A signal processing method flow diagram is provided for the embodiments of the present application. The method can be implemented by the communication apparatus including the first power supply module and the first radio frequency transmitting channel in the foregoing technical solutions. The communication apparatus can be a terminal or a base station. As shown in the figure, Figure 11 The method can include:

[0155] Step 1101: when the first radio frequency transmitting channel works in the first bandwidth, amplifying a first signal output by the first radio frequency transmitting channel by the first PA.

[0156] The first signal is a signal processed by digital pre-distortion, and the power voltage of the first PA is a non-envelope waveform.

[0157] In step 1102, when the first radio frequency transmitting channel works in the second bandwidth, the second signal output by the first radio frequency transmitting channel is amplified by the first PA.

[0158] The second signal is a signal not processed by digital pre-distortion, the power voltage of the first PA is provided by the first power module, the power voltage provided by the first power module is an envelope waveform, and the first bandwidth is greater than the second bandwidth.

[0159] In an optional implementation, before the first signal is amplified by the first PA, the method further includes: processing the signal input into the first radio frequency transmitting channel by a first digital pre-distortion (DPD) core to obtain the first signal.

[0160] In an optional implementation, before the second signal is amplified by the first PA, the method further includes: configuring the first digital pre-distortion (DPD) core to bypass the input end of the first PA.

[0161] In an optional implementation, the center frequency point of the first bandwidth is different from the center frequency point of the second bandwidth.

[0162] In an optional implementation, the center frequency point of the first bandwidth is 3.5 GHz, and the center frequency point of the second bandwidth is 2.1 GHz.

[0163] In an optional implementation, the communication device further includes a second DPD core and a second radio frequency transmitting channel, and the second radio frequency transmitting channel includes a second PA. The method further includes: when the second radio frequency transmitting channel works in the first bandwidth, processing the signal input into the second radio frequency transmitting channel by the second DPD core; and amplifying the signal processed by the second DPD core by the second PA.

[0164] In an optional implementation, the communication device further includes a second power module, and the method further includes: providing the power voltage for the second PA by the second power module, and the power voltage provided by the second power module is an envelope waveform.

[0165] In a possible design, the first power module is a power module using envelope tracking (ET) technology.

[0166] In one possible design, the second power module is a power module employing envelope tracking (ET) technology.

[0167] Those skilled in the art will appreciate that embodiments of the present application can be readily used as software, hardware, or a combination of software and hardware. In one example, embodiments of the present application can be implemented in software and / or firmware. In one embodiment, the software and / or firmware implements the methodology described herein as a computer program product. In one embodiment, the computer program product includes a computer readable storage medium having stored, thereon, computer readable program code. Examples of computer readable storage media include, but are not limited to, magnetic storage media such as hard disks, floppy disks, and magnetic tape; optical storage media such as Compact Disc (CD) and DVD; magneto-optical storage media such as optical disks; and semiconductor storage media such as flash memory, EPROM, and EEPROM. In another embodiment, the computer readable program code can be downloaded into a computer from one of these computer readable storage media, or can be downloaded into a computer from another computer via a computer network, or a combination thereof. In another embodiment, the computer readable program code can be downloaded into a computer from one of these computer readable storage media, or can be downloaded into a computer from another computer via a computer network, or a combination thereof.

[0168] The present application is described in reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in one or more of the flowchart illustrations and / or block diagrams. Figure 1 means for performing the functions specified in one or more of the flowchart illustrations and / or block diagrams.

[0169] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more functions specified in one or more of the flowchart illustrations and / or block diagrams. Figure 1 means for performing the functions specified in one or more of the flowchart illustrations and / or block diagrams.

[0170] It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the scope of the application. Thus, it is intended that the present application cover the modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims

1. A communication device, characterized in that, include: A first power supply module and a first radio frequency (RF) transmitting channel; wherein the first RF transmitting channel and the first power supply module are respectively coupled to a first power amplifier (PA); When the first radio frequency transmission channel operates in the first bandwidth, the first radio frequency transmission channel is configured to provide a digitally predistorted signal to the first PA, and the first power supply module is configured to provide a fixed voltage to the first PA. When the first RF transmission channel operates in the second bandwidth, the first RF transmission channel is configured to provide the first PA with a signal without digital predistortion processing, and the first power module is configured to provide the first PA with a power supply voltage of the envelope waveform.

2. A communication device, characterized in that, include: A first power supply module and a first radio frequency transmission channel; wherein the first radio frequency transmission channel and the first power supply module are respectively coupled to a first power amplifier (PA) and a third power amplifier (PA); When the first radio frequency transmission channel operates in the first bandwidth, the first radio frequency transmission channel is configured to provide a digitally predistorted signal to the first PA, and the first power supply module is configured to provide a fixed voltage to the first PA. When the first RF transmission channel operates in the second bandwidth, the first RF transmission channel is configured to provide the third PA with a signal without digital predistortion processing, and the first power module is configured to provide the third PA with a power supply voltage of the envelope waveform.

3. The apparatus according to claim 1 or 2, characterized in that, The device also includes a first digital predistortion (DPD) core; When the first radio frequency transmission channel operates at the first bandwidth, the first DPD core is used to perform digital predistortion processing on the signal input to the first radio frequency transmission channel. When the first radio frequency transmission channel operates in the second bandwidth, the first DPD core is configured to bypass the input of the first PA.

4. The apparatus according to claim 3, characterized in that, The first DPD core uses a predistortion coefficient lookup table (LUT) corresponding to the first bandwidth to perform digital predistortion processing on the signal input to the first radio frequency transmission channel.

5. The apparatus according to claim 1 or 2, characterized in that, When the first RF transmission channel operates in the second bandwidth, the first power module uses an envelope tracking LUT corresponding to the second bandwidth to generate a power supply voltage for the first PA or the third PA.

6. The apparatus according to claim 1 or 2, characterized in that, The center frequency of the first bandwidth is different from that of the second bandwidth.

7. The apparatus according to claim 1 or 2, characterized in that, The center frequency of the first bandwidth is 3.5 GHz; the center frequency of the second bandwidth is 2.1 GHz.

8. The apparatus according to claim 1 or 2, characterized in that, The device also includes a second DPD core, a second radio frequency transmission channel, and a second PA; When the second radio frequency transmission channel operates at the first bandwidth, the second DPD core is used to perform digital predistortion processing on the signal input to the second radio frequency transmission channel; The second radio frequency transmission channel is configured to provide a digitally predistorted signal to the second PA.

9. The apparatus according to claim 8, characterized in that, The device also includes a second power supply module; The second power module is used to provide power voltage to the second PA, and the waveform of the power voltage provided by the second power module is an envelope waveform.

10. The apparatus according to claim 1 or 2, characterized in that, The first bandwidth is greater than the second bandwidth.

11. A signal processing method, characterized in that, An application to a communication device including a first power supply module and a first radio frequency transmission channel; wherein the first radio frequency transmission channel and the first power supply module are respectively coupled to a first power amplifier PA; the method includes: When the first radio frequency transmission channel operates in the first bandwidth, it outputs a signal that has undergone digital predistortion processing to the first PA through the first radio frequency transmission channel; wherein, the first power supply module is configured to provide a fixed voltage to the first PA; When the first RF transmission channel operates in the second bandwidth, it provides a signal to the first PA without digital predistortion processing through the first RF transmission channel; wherein, the first power module is configured to provide the first PA with a power supply voltage of the envelope waveform.

12. A signal processing method, characterized in that, An application to a communication device including a first power supply module and a first radio frequency transmission channel; wherein the first radio frequency transmission channel and the first power supply module are respectively coupled to a first power amplifier (PA) and a third power amplifier (PA); the method includes: When the first radio frequency transmission channel operates in the first bandwidth, it provides a digitally predistorted signal to the first PA through the first radio frequency transmission channel; the first power supply module is configured to provide a fixed voltage to the first PA; When the first RF transmission channel operates in the second bandwidth, the first RF transmission channel is configured to provide the third PA with a signal without digital predistortion processing; the first power module is configured to provide the third PA with a power supply voltage of the envelope waveform.

13. The method according to claim 11 or 12, characterized in that, The communication device further includes a first digital predistortion (DPD) core; When the first radio frequency transmission channel operates at the first bandwidth, the signal input to the first radio frequency transmission channel is digitally predistorted through the first DPD core.

14. The method according to claim 13, characterized in that, The first DPD core uses a predistortion coefficient lookup table (LUT) corresponding to the first bandwidth to perform digital predistortion processing on the signal input to the first radio frequency transmission channel.

15. The method according to claim 11 or 12, characterized in that, The center frequency of the first bandwidth is different from that of the second bandwidth.

16. The method according to claim 11 or 12, characterized in that, The center frequency of the first bandwidth is 3.5 GHz; the center frequency of the second bandwidth is 2.1 GHz.

17. The method according to claim 11 or 12, characterized in that, The communication device further includes a second DPD core, a second radio frequency transmission channel, and a second PA; When the second radio frequency transmission channel operates at the first bandwidth, the signal input to the second radio frequency transmission channel is digitally predistorted by the second DPD core; The digitally predistorted signal is output to the second PA through the second radio frequency transmission channel; The first power module provides a fixed voltage to the first PA; the second PA amplifies the digitally predistorted signal.

18. The method according to claim 17, characterized in that, The communication device also includes a second power module; The second power module provides power voltage to the second PA, and the waveform of the power voltage provided by the second power module is an envelope waveform.

19. The method according to claim 11 or 12, characterized in that, The first bandwidth is greater than the second bandwidth.

20. A communication device, characterized in that, include: Processor and memory; The memory is used to store program instructions; The processor is used to execute program instructions stored in the memory to implement the method of any one of claims 11 to 19.

21. A communication device, characterized in that, include: Processor and interface circuitry; The interface circuit is used to access a memory, which stores program instructions. The processor is configured to access the memory via the interface circuit and execute program instructions stored in the memory to implement the method of any one of claims 11 to 19.

22. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores program code that, when executed by a computer, implements the method of any one of claims 11 to 19.

23. A computer program product, characterized in that, When the program code contained in the computer program product is executed by a computer, it implements the method of any one of claims 11 to 19.

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