Beam signal correction method, communication device, and readable storage medium

Abstract

Disclosed in the present application are a beam signal correction method, a communication device, and a readable storage medium, which are applied to a beam signal correction system. The beam signal correction system comprises a feedback link, at least one radio frequency digital link, at least one radio frequency analog link, and a target pre-distorter to which radio frequency digital links jointly correspond. The method comprises: on the basis of original digital signals of radio frequency digital links, generating radio frequency analog signals respectively corresponding to radio frequency analog links, wherein the radio frequency analog signals are obtained by jointly converting the original digital signals of the radio frequency digital links; by means of a feedback link, transmitting to a target pre-distorter a beam signal to be corrected to which the radio frequency analog signals jointly correspond; calculating a signal correction coefficient of said beam signal on the basis of said beam signal and the original digital signals; and correcting said beam signal at the target pre-distorter on the basis of the signal correction coefficient.

Description

Beam signal correction method, communication device and readable storage medium

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202311285257.1 filed on September 28, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of communication technology, and in particular to a beam signal correction method, communication equipment, and a readable storage medium. Background Art

[0004] With the continuous development of communication technology, high-efficiency, high-linearity, and high-carrier power amplifiers (PAs) are commonly used in transmitter systems in satellite communication scenarios to amplify signals to meet the coverage requirements of base station equipment. However, when amplifying linearly modulated signals, distortion is inevitable due to the operating characteristics of the power amplifier. Therefore, in order to improve the efficiency and linearity of the power amplifier (PA), the transmitter system often introduces pre-distortion technology to eliminate the nonlinearity of the power amplifier.

[0005] Currently, mainstream pre-distortion technologies for beam signal correction in fully connected beamforming architectures typically employ digital beamforming and analog beamforming correction schemes. The former requires a corresponding pre-distortion module (DPD) for each power amplifier (PA), a so-called "one-calibration-one-solution" approach. The latter involves installing a pre-distortion module in a power amplifier chain containing multiple PAs to correct the link signal, a so-called "one-calibration-multiple-solution" approach. However, due to the large number of PAs in a transmitter system and the presence of initial digital signals from different RF digital links in the same PA chain, the implementation cost of the "one-calibration-one-solution" approach is high. Furthermore, in the "one-calibration-multiple-solution" approach, digital signals from different RF digital links are combined before the PA, resulting in complex nonlinear intermodulation distortion in the amplified signal. Therefore, current approaches to beam signal correction in fully connected beamforming architectures cannot balance cost and effectiveness.

[0006] Summary of the Invention

[0007] The main purpose of this application is to provide a beam signal correction method, communication equipment and readable storage medium, aiming to solve the technical problem in the prior art that it is impossible to take into account both the correction cost and the correction effect when correcting the beam signal under the fully connected beamforming architecture.

[0008] In the first aspect, an embodiment of the present application provides a beam signal correction method. Applied to a beam signal correction system, the beam signal correction system includes a feedback link, at least one RF digital link, at least one RF analog link, and a target predistorter corresponding to each of the RF digital links. The beam signal correction method includes: generating RF analog signals corresponding to each of the RF analog links according to the original digital signals of each of the RF digital links, wherein the RF analog signals are obtained by converting the original digital signals of each of the RF digital links; transmitting the beam signal to be corrected corresponding to each of the RF analog signals to the target predistorter through the feedback link; calculating the signal correction coefficient of the beam signal to be corrected according to the beam signal to be corrected and each of the original digital signals; and correcting the beam signal to be corrected in the target predistorter according to the signal correction coefficient.

[0009] In a second aspect, an embodiment of the present application provides a communication device. The communication device includes: one or more processors; a memory; and one or more computer programs, wherein the one or more computer programs are stored on the memory. When the computer programs are executed by the one or more processors, the communication device performs the following steps: based on the original digital signals of each of the RF digital links, generating RF analog signals corresponding to each of the RF analog links, wherein the RF analog signals are obtained by converting the original digital signals of each of the RF digital links; transmitting the beam signal to be corrected corresponding to each of the RF analog signals to the target predistorter through the feedback link; calculating the signal correction coefficient of the beam signal to be corrected based on the beam signal to be corrected and each of the original digital signals; and correcting the beam signal to be corrected in the target predistorter based on the signal correction coefficient. The second aspect corresponds to any one of the implementation methods of the first aspect. The technical effects corresponding to the second aspect can refer to the technical effects corresponding to the above-mentioned first aspect and will not be repeated here.

[0010] In a third aspect, embodiments of the present application provide a computer-readable storage medium. This computer-readable storage medium includes a computer program. When executed on a communication device, the computer program causes the communication device to perform the beam signal correction method of the first aspect. The third aspect corresponds to any implementation of the first aspect. The technical effects corresponding to the third aspect can be referenced to the technical effects corresponding to the first aspect described above and are not further elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0013] FIG1 is a schematic flow chart of a first embodiment of a beam signal correction method of the present application;

[0014] FIG2 is a schematic structural diagram of a beam signal correction system according to a first embodiment of the beam signal correction method of the present application;

[0015] FIG3 is a first structural diagram of a beam signal correction system according to a first embodiment of the beam signal correction method of the present application;

[0016] FIG4 is a second structural diagram of the beam signal correction system of the first embodiment of the beam signal correction method of the present application;

[0017] FIG5 is a third structural diagram of the beam signal correction system of the first embodiment of the beam signal correction method of the present application;

[0018] FIG6 is a fourth structural diagram of the beam signal correction system of the first embodiment of the beam signal correction method of the present application;

[0019] FIG7 is a fifth structural diagram of the beam signal correction system of the first embodiment of the beam signal correction method of the present application;

[0020] FIG8 is a sixth structural diagram of the beam signal correction system of the first embodiment of the beam signal correction method of the present application;

[0021] FIG9 is a seventh structural diagram of the beam signal correction system of the first embodiment of the beam signal correction method of the present application;

[0022] FIG10 is an eighth structural diagram of the beam signal correction system of the first embodiment of the beam signal correction method of the present application;

[0023] FIG11 is a flow chart of a second embodiment of a beam signal correction method according to the present application;

[0024] FIG12 is a ninth structural diagram of the beam signal correction system according to the second embodiment of the beam signal correction method of the present application;

[0025] FIG13 is a tenth structural diagram of a beam signal correction system according to the second embodiment of the beam signal correction method of the present application;

[0026] FIG14 is a schematic structural diagram of the beam signal correction device of the present application;

[0027] FIG15 is a schematic diagram of the device structure of the hardware operating environment involved in the beam signal correction method in an embodiment of the present application.

[0028] The purpose, features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] To make the above-mentioned purposes, features, and advantages of the present application more clearly understood, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application.

[0030] 1 , an embodiment of the present application provides a beam signal correction method, which is applied to a beam signal correction system. The beam signal correction system includes a feedback link, at least one radio frequency digital link, at least one radio frequency analog link, and a target predistorter corresponding to each of the radio frequency digital links. In a first embodiment of the beam signal correction method of the present application, the beam signal correction method includes:

[0031] Step S10: generating radio frequency analog signals corresponding to the radio frequency analog links according to the original digital signals of the radio frequency digital links, wherein the radio frequency analog signals are obtained by converting the original digital signals of the radio frequency digital links;

[0032] Step S20: transmitting the beam signal to be corrected corresponding to each of the RF analog signals to the target predistorter through the feedback link;

[0033] Step S30, calculating a signal correction coefficient of the beam signal to be corrected according to the beam signal to be corrected and each of the original digital signals;

[0034] Step S40: Correcting the beam signal to be corrected in the target predistorter according to the signal correction coefficient.

[0035] In this embodiment, when correcting the beam signal under the fully connected beamforming architecture, since the power amplifier will have distortion when amplifying the linear modulated signal, a pre-distortion module is set to correct the beam signal. In theory, a pre-distortion module can be set for each power amplifier to achieve "one-to-one correction". However, in actual application scenarios, there is often an order of magnitude difference between the number of power amplifiers and the number of pre-distortion modules. For example, in a satellite communication system, the number of power amplifiers far exceeds the number of pre-distortion modules. In theory, a "one-correction-one" solution can be implemented, but the cost of implementation is difficult to estimate. In addition, when performing beam signal correction, a "one-correction-multiple" solution can also be implemented, that is, multiple power amplifiers are corrected by one pre-distortion module. However, this correction solution is only applicable to analog beamforming architectures, and there are differences in signal transmission between the fully connected beamforming architecture and the analog beamforming architecture. There are differences in the RF digital signal and the RF analog signal in the fully connected beamforming architecture. The pre-distortion module can only offset the nonlinearity of the RF digital signal from a single RF digital link, but cannot offset the nonlinearity generated by the RF digital signals of other included RF digital links. As a result, the signal in the beam direction after spatial synthesis still retains the above-mentioned distortion. That is, the signal after power amplification on different RF analog links generates complex nonlinear intermodulation distortion, which seriously deteriorates the quality of the transmitted signal. It can be seen that the current correction schemes for beam signals under the fully connected beamforming architecture have obvious technical defects. The former has too high an implementation cost, and the latter has limited correction effect. Therefore, when correcting the beam signals under the fully connected beamforming architecture, it is currently impossible to take into account both the correction cost and the correction effect. Beamforming refers to giving electromagnetic waves a certain shape for concentrated propagation.

[0036] In addition, the beam signal correction method used in the embodiment of the present application is applied to a beam signal correction system. The beam signal correction system is deployed in a communication device. The communication device can specifically be an AAU (Active Antenna Unit) product, an RRU (Remote Radio Unit) product, and a product that deploys a satellite phased array system. The scenarios for beam signal correction of the communication device include but are not limited to R&D commissioning, production testing, and system applications. Referring to Figure 2, Figure 2 is a structural diagram of the beam signal correction system, wherein the beam signal correction system includes X1, X2...X n RF digital link, including Y1, Y2...Y nThe RF digital link and the RF analog link are connected via a target predistorter. The target predistorter is an N-input, N-output predistortion module, which includes N-channel beam digital signal inputs and is used to output a corrected beam transmission signal. The feedback link is used to feed back the beam analog signal of the RF analog link to the target predistorter for signal correction by the target predistorter. Specifically, the predistorter may include devices such as an ADC (Analog-to-digital converter) and a PI (proportional-integral controller). Digital coding is used to transmit and process signals. The RF digital link refers to a communication link that transmits and processes signals in the digital domain, and the RF analog link refers to a communication link that transmits and processes signals in the analog domain.

[0037] Additionally, the target predistorter is used to characterize the distorter that performs the beam signal correction method, and may include an ADC / DAC (Digital to Analog Converter). The system comprises a digital-to-analog converter (DAC) interface, a transmit equalizer, a predistortion processing module, and a mixer, etc., which can be specifically one. The original digital signal is used to represent the digital signal input to the target predistorter, and can specifically be a digital signal input to the target predistorter after digital coding transmission and processing, or a digital signal input to the target predistorter after digital coding and phase shifting by a phase shifter. The RF analog signal is used to represent the analog signal output to the feedback link after transmission and processing via the RF analog link. The beam signal to be corrected is used to represent the beam digital signal to be corrected. The signal correction coefficient is used to represent the nonlinear coefficient corresponding to the correction of the nonlinear product, which can be implemented by a nonlinear correction module provided in the beam signal correction system. The nonlinear correction module can be provided inside the target predistorter or outside the target predistorter. The nonlinear correction module can solve the nonlinear coefficient of each RF digital link based on the beam signal to be corrected and the original digital signal. For example, in one practicable manner, it is assumed that the nonlinear correction module inputs N original digital signals X1, X2...X n , and input beam signals to be corrected S1, S2...S n The signal composition of the beam signal to be corrected includes nonlinear products generated by N original digital signals passing through the RF analog link. The nonlinear product can be specifically generated by a power amplifier set up in the RF analog link. Since the original digital signal and the beam signal to be corrected are both known quantities, the nonlinear coefficient corresponding to the nonlinear product can be obtained by establishing an equation and solving it.

[0038] In addition, in order to achieve the correction of the beam signal to be corrected, it is necessary to ensure that the RF analog signal of the RF analog link is converted from the original digital signal of multiple RF digital links, that is, to ensure that the RF analog link contains signals from different RF digital links before generating nonlinear products, thereby avoiding the channel differences before the RF analog link is amplified, so that targeted correction can be performed through the nonlinear coefficient. Referring to the existing fully connected beamforming architecture, corresponding devices are synchronously set in the RF digital link, RF analog link and feedback link, wherein the RF digital link includes a phase shifter, which is used to interleave and phase shift the digital signal. The phase shifter can be implemented by one or more digital beamforming chips, and is output to the subsequent module after the input signal is interleaved and phase shifted by the phase shifter, and then Each output signal contains the data of all input signals, so that multiple RF digital links can be transmitted to the RF analog link respectively. The RF analog link includes a digital-to-analog converter, an RF front-end link, a coupler and a power amplifier. The digital-to-analog converter is used to convert the digital signal into an analog signal. The RF front-end link includes but is not limited to RF devices such as up- and down-converters, baluns, attenuators and amplifiers. The power amplifier is used to amplify the RF analog signal. The coupler is used to transmit the output signal of the power amplifier. It can be implemented specifically through devices or microstrip lines. For example, referring to Figure 3, Figure 3 is a first structural diagram of the beam signal correction system, wherein the nonlinear correction module is arranged outside the target predistorter, and the digital encoding input digital signals X1, X2...X n The phase shifter to the RF digital link splits each digital signal to obtain 1-1, 1-2...1-m digital signals, and then the phase shifter can split M*N digital signals, and then combine them into M signals for output. That is, the digital beamforming chip corresponding to the phase shifter is an N-input and M-output module. Usually, the number of signal chains output by the phase shifter and the number of signal chains input to the phase shifter are orders of magnitude different, that is, M is much larger than N, and the original digital signal input to the target predistorter is M-channel digital signal containing N-channel digital signal components, that is, the original digital signal of M channels can be expressed as "y 11 、y 12 ...y 1n ", "y 21 、y 22 ...y 2n ”、……、“y (m-1)1 、y (m-1)2 ...y (m-1)n ”, “y m1 、y m2 ...y m2", and then the target predistorter converts the original digital signal into an analog signal through a digital-to-analog converter, and then transmits it through the RF front-end link and amplifies it with a power amplifier to obtain the RF analog signal corresponding to each RF analog link. That is, the RF analog signal of M channels can be expressed as "p1*(y 11 、y 12 ...y 1n )","p2*(y 21 、y 22 ...y 2n )”、……、“p m-1 *(y (m-1)1 、y (m-1)2 ...y (m-1)n )","p m *(y m1 、y m2 ...y m2 )", and then by setting M feedback sub-links in the feedback link, and setting an analog-to-digital converter in each feedback sub-link, the RF analog signal is converted into a digital signal, and then the digital signals output by the multiple feedback sub-links are collectively used as the beam signal to be corrected and input into the nonlinear correction module. Then, based on the known beam signal to be corrected and the original digital signal, the nonlinear correction module calculates the signal correction coefficient through a preset algorithm, and finally the nonlinear distortion of the transmitted signal can be eliminated through the signal correction coefficient.

[0039] As an example, steps S10 to S40 include: performing phase shifting on the input digital signals of each of the RF digital links through a phase shifter to obtain the original digital signals of each of the RF digital links; for any of the original digital signals, converting the original digital signal into an original analog signal through a digital-to-analog converter, and then transmitting the original analog signal to a power amplifier via a RF front-end link, and amplifying the original analog signals of all RF analog links into RF analog signals through each of the power amplifiers; converting the RF analog signals of all feedback sub-links into RF digital signals through at least one analog-to-digital converter, and transmitting all RF digital signals as beam signals to be corrected to a target predistorter and a nonlinear correction module; calculating, in the nonlinear correction module, a signal correction coefficient of the beam signal to be corrected based on each of the original digital signals and the beam signal to be corrected, wherein the time when the nonlinear correction module receives each of the original digital signals is not specifically limited, and can be during the process of generating the RF analog signal or during the process of transmitting the beam signal to be corrected; transmitting the signal correction coefficient from the nonlinear correction module to the target predistorter, and correcting the beam signal to be corrected in the target predistorter based on the signal correction coefficient.

[0040] As another example, steps S10 to S40 include: performing phase shifting on the input digital signals of each of the RF digital links through a phase shifter to obtain the original digital signals of each of the RF digital links; for any of the original digital signals, converting the original digital signal into an original analog signal through a digital-to-analog converter and then transmitting the original analog signal to a power amplifier via the RF front-end link, and amplifying the original analog signals of all RF analog links into RF analog signals through each of the power amplifiers; converting the RF analog signals of all feedback sub-links into RF digital signals through at least one analog-to-digital converter, and transmitting all RF digital signals as beam signals to be corrected to a target predistorter; calculating the signal correction coefficient of the beam signal to be corrected based on the beam signal to be corrected and each of the original digital signals through the nonlinear correction module of the target predistorter; and correcting the beam signal to be corrected based on the signal correction coefficient through the predistortion processing module of the target predistorter.

[0041] In one practicable manner, the specific steps of calculating the signal correction are as follows:

[0042] Among them, x1, x2, ... x n is the input digital signal, y1, y2...y n is the original digital signal, z1, z2...z m is the RF analog signal, s1, s2...s m Together as the beam signal to be corrected, α ij represents the phase modulation coefficient of the i-th beam signal corresponding to the j-th transmission signal, i=1,2,3…,m,j=1,2,3…,n,m>>n,p jk is the kth nonlinear coefficient corresponding to the jth power amplifier, and when k=1, it represents the power amplifier gain. The RF analog signal in, is a nonlinear signal, and:

[0043] Among them, β ji To express the contribution coefficient of the j-th RF analog signal to the i-th beam after beamforming, in the above equation, since the matrices s, β, and x are all known quantities, that is, by calculating the original digital signal and the beam signal to be corrected, it can be concluded that the output specific beam signal has nonlinear parameters that cause all signals to be coupled with each other. Ultimately, the beam signal can be specifically corrected through the nonlinear parameters.

[0044] In one practicable manner, referring to FIG. 4 , which is a second structural schematic diagram of a beam signal correction system, the nonlinear correction module is disposed inside the predistorter. This eliminates the need to separately transmit the original digital signal to the predistorter and the nonlinear correction module, thereby reducing the layout area of ​​the beam signal correction system. This lays the foundation for reducing the beam signal correction cost under a fully connected beamforming architecture.

[0045] In another practicable manner, the original digital signal may be one or more groups. When the original digital signal is multiple groups, the complexity of the phase shifter module can be reduced when the phase shifter is used for phase shifting. This is applicable to both digital domain phase shifter modules and analog domain phase shifter modules. Referring to FIG5 , FIG5 is a third structural diagram of a beam signal correction system. In this beam signal correction system, it is assumed that there are two groups of original digital signals "x1, x2...x n ” and “x n+1 , x n+2 …x 2n ", the two groups of original digital signals are the same. After the two groups of original digital signals are input to the phase shifter, the phase shifter corresponding to each group of original signals splits each digital signal into M / 2 paths, and obtains 1-1, 1-2...1-M / 2 digital signals, that is, "x1, x2...x n " corresponds to 1~M / 2 RF analog links, "x n+1 , x n+2 …x 2n "This corresponds to M / 2+1 to M RF analog links, resulting in a total of M RF analog links. Each group can be branched through a phase shifter to obtain M / 2*N digital signals, which are then combined into M / 2 signals for output. That is, the digital beamforming chip corresponding to the phase shifter is an N-input, M / 2-output module. Compared with the beam signal correction system that deploys an N-input, M-output phase shifter module, the beam correction system architecture shown in Figure 5 reduces the number of phase shifter branches, thereby reducing the complexity of the phase shifter module. Moreover, the phase shifter is located in the analog link, that is, the phase shifter module is implemented in the analog domain, thereby greatly reducing the complexity of the power division network. For example, the power division network is reduced from 1 to M to 1 to M / 2, and its complexity is reduced by half. When there are Q groups of beam signals, the complexity of the phase shifter will be reduced by Q times. In summary, the embodiments of the present application further reduce the structural complexity of the beam signal correction system.

[0046] In this way, after the beam signal correction system in the embodiment of the present application obtains the original digital signal through phase shifting by the phase shifter, it converts the digital signal into an analog signal through a digital-to-analog converter, and transmits the analog signal to the power amplifier through multiple RF front-end links. The power amplifier amplifies all analog signals into RF analog signals, and then transmits the output signal of the power amplifier through the coupler, and converts all RF analog signals into RF digital signals through the analog-to-digital converter, and then transmits all RF digital signals together as the beam signal to be corrected to the target predistorter. Since the original digital signal and the beam signal to be corrected are both known quantities, the signal correction coefficient of the beam signal to be corrected can be directly calculated, and finally the target predistorter is used according to the signal correction coefficient. , the beam signal to be corrected is corrected. Since the RF analog signal is obtained by converting the original digital signal of each RF digital link, the nonlinear product in the beam signal to be corrected can be corrected in a targeted manner through the signal correction coefficient, thereby achieving the purpose of ensuring the signal transmission quality of the beam signal correction system. At the same time, since only one target predistorter is used in the process of correcting the beam signal to be corrected, the beam signal correction cost under the fully connected beamforming architecture can be controlled. That is, the beam signal correction system of the embodiment of the present application not only reduces the distortion of the beam signal after power amplification of different RF analog links, but also effectively controls the correction cost. Therefore, when correcting the beam signal under the fully connected beamforming architecture, both the correction cost and the correction effect are taken into account.

[0047] The RF digital link includes a first phase shifter, the RF analog link includes a first digital-to-analog converter, a first RF front-end link, and a first power amplifier, and generating RF analog signals corresponding to each RF analog link according to the original digital signals of each RF digital link includes:

[0048] Step A10: performing phase shifting on the original digital signals of all RF digital links by the first phase shifter to obtain first beam digital signals corresponding to each of the RF analog links;

[0049] Step A20: For any first beam digital signal, convert the first beam digital signal into a first beam analog signal through the first digital-to-analog converter, and then transmit the first beam analog signal to the first power amplifier via the first RF front-end link;

[0050] Step A30: amplify the first beam analog signals of all radio frequency analog links into the radio frequency analog signals through the first power amplifiers.

[0051] In this embodiment, the requirements for beam signal correction vary in different business scenarios. Therefore, in this embodiment, a beam signal correction system different from the above-mentioned embodiment is proposed to improve the applicability of beam signal correction under the fully connected beamforming architecture. Referring to Figure 6, Figure 6 is a fourth structural schematic diagram of the beam signal correction system, wherein the target predistorter is arranged before the phase shifter, that is, the original digital signal is directly input into the nonlinear correction module, rather than the digital signal after phase shifting by the phase shifter as the original digital signal input into the nonlinear correction module. In comparison, the former can reduce the amount of wiring, while the latter can reduce the computational complexity of the nonlinear correction module. Therefore, the above two beam signal correction systems can broaden the different business scenarios of beam signal correction.

[0052] Additionally, in the beam signal correction system of this embodiment, the digitally encoded, transmitted, and processed signal is directly used as the original digital signal. That is, the input digital signal of the radio frequency digital link is not processed before being input into the target predistorter. Then, when calculating the signal correction coefficient of the beam signal to be corrected, the signal is adjusted as the original digital signal of a known quantity. For example, in one practicable manner, the specific steps of calculating the signal correction are as follows:

[0053] Among them, t1, t2, ..., t n is the original digital signal, r1, r2...r n It is the first beam digital signal. For other contents, please refer to the above description, which will not be described in detail in this embodiment.

[0054] As an example, steps A10 to A30: after the target predistorter outputs the original digital signals of each of the RF digital links, the original digital signals of all the RF digital links are phase-shifted by the first phase shifter to obtain the first beam digital signals corresponding to each of the RF analog links, wherein the first beam digital signal refers to the digital signal output by multiple RF digital links received by each of the RF analog links; for any of the first beam digital signals, the first beam digital signal is converted into a first beam analog signal by the first digital-to-analog converter, and the first beam analog signal is transmitted to the first power amplifier through the first RF front-end link; the first beam analog signals of all RF analog links are power-amplified to the RF analog signal by each of the first power amplifiers.

[0055] In one implementation, the original digital signal can be represented as “X1, X2…X n ", that is, X1 represents the original digital signal of the first RF digital link, X2 represents the original digital signal of the second RF digital link, Xn The original digital signal of the Nth RF digital link is represented. There are N RF digital links in total. The phase shifter can split the original digital signal of each RF digital link into m signals. The m signals can be represented as "1-1, 1-2...1-(m-1), 1-m" in sequence. After the phase shift is completed, a first beam digital signal matching the number of links in the RF analog link is obtained. The first beam digital signal can be represented as:

[0056] “(y 11 ,y 12 …y 1n )、(y 21 ,y 22 …y 2n )…(y (m-1)1 ,y (m-1)2 …y (m-1)n )、(y m1 ,y m2 …y mn )”.

[0057] Among them, (y 11 ,y 12 …y 1n ) is the first beam digital signal of the first RF analog link, (y 21 ,y 22 …y 2n ) is the first beam digital signal of the second RF analog link, (y m1 ,y m2 …y mn ) is the first beam digital signal of the mth RF analog link. For the first beam digital signal of any RF analog link, it contains digital signal components from N channels. For each RF analog link, a digital-to-analog converter is provided for signal conversion, a RF front-end link is provided for signal transmission, and a power amplifier is provided for analog signal amplification. Then, the RF analog signal is converted into the beam signal to be corrected "s1, s2, ... s" through the feedback link and the analog-to-digital converter provided on the feedback link. n-1 ,s n "Finally, the beam signal to be corrected is corrected through the calculated signal correction coefficient, wherein the number of beam signals to be corrected is the same as the number of links in the RF digital link, so as to facilitate the smooth execution of the subsequent calculation of the signal correction coefficient.

[0058] In this way, the embodiment of the present application directly sends the input digital signal of the RF digital link as the original digital signal to the nonlinear correction module, and places the phase shifting operation of the digital beamforming chip corresponding to the phase shifter after the target predistorter, that is, the first phase shifter is placed in the RF digital link, and then the first beam digital signal corresponding to different RF analog links is obtained by phase shifting through the first phase shifter in the RF digital link, and then a first digital-to-analog converter, a first RF front-end link and a first power amplifier are provided in different RF analog links. Finally, RF analog signals are obtained in different RF analog links through signal conversion and signal power amplification, so that subsequent processes rely on the beam signal to be corrected corresponding to each RF analog signal to calculate the signal correction parameters, and lay the foundation for the final correction of the beam signal to be corrected. At the same time, beam signal correction systems with different fully connected beamforming architectures can also adapt to the signal correction requirements in different business scenarios, thereby improving the applicability of the beam signal correction system.

[0059] The RF analog link includes a second phase shifter, a second digital-to-analog converter, a second RF front-end link, and a second power amplifier, and generating RF analog signals corresponding to each of the RF analog links according to the original digital signals of each of the RF digital links includes:

[0060] Step B10: For any of the original digital signals, convert the original digital signal into an original analog signal using the second digital-to-analog converter, and then transmit the original analog signal to the second phase shifter via the second RF front-end link; and perform phase shifting on all the original analog signals using the second phase shifter to obtain second beam analog signals corresponding to each of the RF analog links.

[0061] Step B20: For any second beam analog signal, amplify the second beam analog signal into the radio frequency analog signal through the second power amplifier.

[0062] In this embodiment, since the processing difficulty of signal phase shifting in the RF digital link and the RF analog link is different, and at the same time, the conditions for executing the phase shifting processing are different in different business scenarios, a beam signal correction system different from the above-mentioned embodiment is proposed in this embodiment to improve the applicability of beam signal correction under the fully connected beamforming architecture. Referring to Figure 7, Figure 7 is a fifth structural schematic diagram of the beam signal correction system, wherein the signal phase shifting processing is implemented in the analog domain of the fully connected beamforming architecture, that is, the RF analog link includes a second phase shifter, a second digital-to-analog converter, a second RF front-end link, and a second power amplifier, while the RF digital link only serves as a medium for transmitting the original digital signal, wherein the original analog signal refers to the output signal of the second digital-to-analog converter, and the second beam analog signal refers to the output signal of the second phase shifter. For the relevant definitions of the second phase shifter, the second digital-to-analog converter, the second RF front-end link, and the second power amplifier, refer to the above-mentioned embodiment and are not repeated in this embodiment.

[0063] As an example, steps B10 to B20 include: for any of the original digital signals, converting the original digital signal into an original analog signal through a second digital-to-analog converter, transmitting the original analog signal to the second phase shifter through a second RF front-end link, and phase-shifting all original analog signals through the second phase shifter to obtain second beam analog signals corresponding to each of the RF analog links; for any of the second beam analog signals, amplifying the second beam analog signal through the second power amplifier to obtain the RF analog signal.

[0064] When the beam signal correction system of this embodiment corrects the beam signal to be corrected, the phase shifting process is implemented in the analog domain, that is, the n-way original analog signal is phase-shifted into m-way second beam analog signal in the analog domain. In this way, the embodiment of the present application directly transmits the input digital signal as the original digital signal to the RF analog link via the RF digital link, and then after the digital signal is converted to an analog signal in the RF analog link, the original analog signal is transmitted via the RF front-end link, and the original analog signal is phase-shifted into a second beam analog signal by the second phase shifter. Finally, the second beam analog signal is evenly amplified in different RF analog links by the second power amplifier to obtain an RF analog signal, so that the subsequent process depends on the beam signal to be corrected corresponding to each RF analog signal to calculate the signal correction parameter, and lays the foundation for the final correction of the beam signal to be corrected. At the same time, since the phase shifting process can be implemented in the digital domain or the analog domain according to different business scenarios, the beam signal correction system with different fully connected beamforming architectures can also adapt to the signal correction requirements in different business scenarios, thereby further improving the applicability of the beam signal correction system.

[0065] The RF analog link includes a third phase shifter, a phase shift link, and a third power amplifier, wherein the phase shift link includes a third digital-to-analog converter and a third RF front-end link, and generating RF analog signals corresponding to each of the RF analog links according to the original digital signals of each of the RF digital links includes:

[0066] Step C10: for any of the original digital signals, dividing the original digital signal into at least one branch digital signal by the third phase shifter;

[0067] Step C20: for any of the branched digital signals, convert the branched digital signal into a branched analog signal through the third digital-to-analog converter, and output the branched analog signal to the third phase shifter through the third RF front-end link;

[0068] Step C30: combining the branch analog signals into third beam analog signals corresponding to the respective RF analog links through the third phase shifters;

[0069] Step C40: For any of the third beam analog signals, amplify the third beam analog signal into the radio frequency analog signal through the third power amplifier.

[0070] In this embodiment, when phase shifting is implemented in the analog domain, since the number of links in the RF analog link is much larger than the number of links in the RF digital link, if the branching operation and the combining operation in the phase shifting process are both implemented in the analog domain, the complexity of the fully connected beamforming architecture will increase. Therefore, this embodiment proposes a beam signal correction system that is different from the above-mentioned embodiment, so as to improve the applicability of beam signal correction under the fully connected beamforming architecture while reducing the complexity of the fully connected beamforming architecture. Referring to Figure 8, Figure 8 is a sixth structural diagram of the beam signal correction system. In this beam signal correction system, the branching operation in the phase shifting process is implemented in the digital domain, and the combining operation in the phase shifting process is implemented in the analog domain, that is, the RF analog link includes A third phase shifter, a phase shift link and a third power amplifier, wherein the phase shift link is used to perform phase shifting and combining on the branched digital signals branched from the RF digital link, and the phase shift link includes a third digital-to-analog converter and a third RF front-end link. For example, in one feasible method, the beam signal correction system has a total of N RF digital signals, and by performing a branching operation of phase shifting processing in the RF digital link, M*N branched digital signals are obtained, and then M*N digital-to-analog converters and M*N RF front-end links are set in the beam signal correction system, and the RF analog link combines them into M third beam analog signals, and power amplifiers are set in the M RF analog links for power amplification, and finally RF analog signals are obtained in all RF analog links.

[0071] As an example, steps C10 to C40: for any of the original digital signals, the original digital signal is divided into at least one branch digital signal through the third phase shifter; for any of the branch digital signals, the branch digital signal is converted through the third digital-to-analog converter to obtain a branch analog signal, and the branch analog signal is output to the third phase shifter through the third RF front-end link, wherein the branch analog signal refers to the output of the third digital-to-analog converter; each of the branch analog signals is combined into a third beam analog signal corresponding to each of the RF analog links through each of the third phase shifters, wherein the third beam analog signal refers to the output of the third phase shifter; for any of the third beam analog signals, the third beam analog signal is amplified into the RF analog signal through the third power amplifier.

[0072] In this way, the embodiment of the present application branches the original digital signal through the RF digital link to obtain multiple branched digital signals, and then converts the branched digital signal into a branched analog signal through the digital-to-analog converter in the RF analog link, and transmits it to the third phase shifter through the third RF front-end link, and combines the multiple analog signals into third beam analog signals corresponding to different RF analog links through the third phase shifter. Finally, the third beam analog signal is evenly amplified in different RF analog links through the second power amplifier to obtain an RF analog signal, so that the subsequent process depends on the beam signal to be corrected corresponding to each RF analog signal to calculate the signal correction parameter, and lays the foundation for the final correction of the beam signal to be corrected. At the same time, since the signal branching operation is performed in the digital domain and the signal combining operation is performed in the analog domain during the phase shifting process, and the number of links in the RF analog link is much larger than the number of links in the RF digital link, the complexity of the phase shifting processing on the RF analog link is reduced.

[0073] The RF digital link includes a fourth phase shifter, the RF analog link includes a fourth digital-to-analog converter, a fourth RF front-end link, and a fourth power amplifier, and generating RF analog signals corresponding to each RF analog link according to the original digital signals of each RF digital link includes:

[0074] Step D10: performing phase shifting on the original digital signals of all RF digital links by the fourth phase shifter to obtain second beam digital signals corresponding to each of the RF analog links;

[0075] Step D20: transmitting all second beam digital signals to their corresponding RF analog links via the target predistorter;

[0076] Step D30: For any second-beam digital signal, the second beam digital signal is converted into a fourth beam analog signal through the fourth digital-to-analog converter and then transmitted to the fourth power amplifier via the fourth RF front-end link, and the fourth beam analog signal is amplified into the RF analog signal through the fourth power amplifier.

[0077] In this embodiment, during the phase shifting process implemented in the digital domain, since the calculation of the signal correction coefficient of the beam signal to be corrected depends on the original digital signal and the beam signal to be corrected, the RF analog signal needs to be calculated according to the contribution coefficient during the calculation process to obtain the factor used for the subsequent calculation of the signal correction coefficient. Therefore, the complexity of calculating the signal correction coefficient is high. Therefore, this embodiment proposes a beam signal correction system that is different from the above-mentioned embodiment to reduce the computational complexity of calculating the signal correction coefficient while taking into account the correction cost and correction effect under the fully connected beamforming architecture. Referring to Figure 9, Figure 9 is a seventh structural schematic diagram of the beam signal correction system, wherein the second beam digital signal obtained after phase shifting by the fourth phase shifter is made to be the same as the RF analog signal ultimately output by the RF analog link. Therefore, the final beam signal to be corrected does not require equation transformation. For example, in one practicable manner, the steps of calculating the signal correction coefficient by the beam signal correction system proposed in this embodiment are as follows:

[0078] Among them, l1, l2...l n It is a radio frequency analog signal, and the contents of this embodiment that are the same as those in the above embodiment will not be repeated here.

[0079] As an example, steps D10 to D30 include: shifting the phase of the original digital signals of all RF digital links through a fourth phase shifter to obtain second beam digital signals corresponding to each RF analog link; transmitting each second beam digital signal to its corresponding RF analog link through the target predistorter; for any second beam digital signal, converting the second beam digital signal into a fourth beam analog signal through the fourth digital-to-analog converter, transmitting each fourth beam analog signal to the fourth power amplifier through the fourth RF front-end link of each RF analog link, and amplifying the fourth beam analog signal into the RF analog signal through the fourth power amplifier, wherein the fourth beam analog signal refers to the output of the fourth power amplifier.

[0080] In this way, the embodiment of the present application implements the phase shifting processing completely in the RF digital link and places the phase shifting processing before the target predistorter, and then uses the fourth phase shifter to shift the original digital signals of all RF digital links into second beam digital signals of different RF analog links, transmit the second beam digital signals through the target predistorter, and perform signal conversion, transmission and power amplification processing on the RF analog link through the fourth digital-to-analog converter, the fourth RF front-end link and the fourth power amplifier. Finally, RF analog signals are obtained in different RF analog links, so that subsequent processes can calculate the signal correction parameters based on the beam signals to be corrected corresponding to each RF analog signal, and lay the foundation for the final correction of the beam signals to be corrected. At the same time, since the digital signal output by the target predistorter is the same as the RF analog signal output by the RF analog link, the RF analog signal is used as an input to the nonlinear correction module, so as to achieve the purpose of reducing the calculation amount of the signal correction coefficient, thereby laying the foundation for improving the calculation efficiency of the signal correction coefficient.

[0081] The radio frequency digital link includes a fifth phase shifter, and calculating the signal correction coefficient of the beam signal to be corrected based on the beam signal to be corrected and each of the original digital signals includes:

[0082] Step E10: Phase-shifting all original digital signals into third beam digital signals corresponding to each of the radio frequency analog links through the fifth phase shifter;

[0083] Step E20: Calculate a signal correction coefficient of the beam signal to be corrected according to the beam signal to be corrected and each of the third beam digital signals.

[0084] In this embodiment, during the phase shifting process implemented in the digital domain, the calculation of the signal correction coefficient of the beam signal to be corrected depends on the original digital signal and the beam signal to be corrected. During the calculation process, the original digital signal must be calculated based on the phase adjustment coefficient to obtain a factor used in the subsequent calculation of the signal correction coefficient. Therefore, the complexity of calculating the signal correction coefficient is high. Therefore, this embodiment proposes a beam signal correction system that differs from the above-described embodiments. This system reduces the computational complexity of calculating the signal correction coefficient while taking into account both the correction cost and the correction effect under a fully connected beamforming architecture. Referring to FIG. 10 , FIG. 10 is a schematic diagram illustrating an eighth structure of the beam signal correction system. The fifth phase shifter is positioned before the target predistorter. By changing the other input "original digital signal" for calculating the signal correction coefficient, the remaining structure is the same as the seventh schematic diagram of the beam signal correction system. This further reduces the computational complexity of the nonlinear correction module. For example, in one practicable embodiment, the steps for calculating the signal correction coefficient are as follows:

[0085] Among them, b1, b2...b n It is the third beam digital signal.

[0086] As an example, step E10 and step E20 include: shifting all original digital signals into third beam digital signals corresponding to each of the RF analog links through the fifth phase shifter; and calculating the signal correction coefficient of the beam signal to be corrected based on the beam signal to be corrected and each of the third beam digital signals.

[0087] In this way, the embodiment of the present application implements the phase shifting process completely in the RF digital link and places the phase shifting process before the target predistorter. Then, the original digital signals of all RF digital links are phase-shifted into third beam digital signals of different RF analog links through the fifth phase shifter. The fifth beam digital signal is transmitted through the target predistorter, and signal conversion, transmission and power amplification processing are performed on the RF analog link through the fifth digital-to-analog converter, the fifth RF front-end link and the fifth power amplifier. Ultimately, RF analog signals are obtained in different RF analog links, so that subsequent processes can calculate signal correction parameters based on the beam signal to be corrected corresponding to each RF analog signal, and lay the foundation for ultimately achieving the correction of the beam signal to be corrected. At the same time, since the fifth phase shifter is placed before the target predistorter, regardless of whether the nonlinear correction module is located in the target predistorter, it uses the phase-shifted signal as the input for the nonlinear correction module to calculate the signal correction coefficient. By changing the original digital signal input, the purpose of reducing the computational complexity of calculating the signal correction coefficient can be achieved, thus laying the foundation for improving the computational efficiency of the signal correction coefficient.

[0088] An embodiment of the present application provides a beam signal correction method, which generates a radio frequency analog signal corresponding to each of the radio frequency analog links based on the original digital signal of each of the radio frequency digital links, wherein the radio frequency analog signal is obtained by converting the original digital signals of each of the radio frequency digital links; the beam signal to be corrected corresponding to each of the radio frequency analog signals is transmitted to the target predistorter through the feedback link; the signal correction coefficient of the beam signal to be corrected is calculated based on the beam signal to be corrected and each of the original digital signals; and the beam signal to be corrected is corrected in the target predistorter based on the signal correction coefficient. In this way, when beam signal correction is performed through the beam signal correction system, corresponding RF analog signals are generated in the RF analog digital link through the original digital signal of the RF analog link. Since the correction of the beam signal to be corrected depends on the original digital signals of all RF digital links, the purpose of inputting the signal of the target predistorter to include the original digital signals of all RF digital links is achieved, and then the target predistorter calculates the signal correction coefficient by jointly calculating the common corresponding beam signal to be corrected of all RF analog links received through the feedback link and the original digital signal received through the RF digital link, so that the target predistorter realizes the correction of the beam signals from different links through the signal correction coefficient. The purpose of correcting the beam signals of all channels is to correct the beam signals, that is, the purpose of correcting the beam signals can be achieved by setting a target predistorter. At the same time, since the RF analog signal is converted from the original digital signal of each RF digital link, that is, the RF digital signal input by each RF analog link contains signals from different RF digital links, it is ensured that different RF analog links will not generate complex nonlinear intermodulation distortion due to the channel difference before power amplification during power amplification, thereby reducing the distortion of the beam signals after power amplification of different RF analog links. Therefore, when correcting the beam signals under the fully connected beamforming architecture, both the correction cost and the correction effect are taken into account.

[0089] Referring to FIG11 , in a second embodiment of the present application, the same or similar contents as those in the above embodiment may be referred to above and will not be described in detail. The beam signal correction system further includes a combining network, the feedback link includes a first analog-to-digital converter, and the feedback link transmits the beam signal to be corrected corresponding to each of the RF analog signals to the target predistorter, including:

[0090] Step F10, combining the RF analog signals into a first total analog signal corresponding to the RF analog signals through the combining network;

[0091] Step F20, converting the first total analog signal into the beam signal to be corrected by the first analog-to-digital converter;

[0092] Step F30: transmitting the beam signal to be corrected to the target predistorter.

[0093] In this embodiment, the combining network combines M analog transmit signals (i.e., the output of the power amplifier) ​​into one or N analog RF signals. This output signal is consistent with the beam signal shaped at the antenna. The purpose is to use the combining network to create an equivalent beam signal at the antenna, which is divided into a transmission part and a synthesis part. The transmission part can be implemented using microstrip lines, a Butler matrix, or other forms. The M analog signals pass through different microstrip lines or have different phase delays. By adjusting the microstrip line length and setting the appropriate phase, the M analog signals can be simulated to the antenna element. Then, the synthesis part synthesizes all the signals into 1 or N beam signals, which can be implemented in the form of microstrip lines, Butler matrices, synthesizers, etc.; since the RF analog signals are usually transmitted through one-to-one feedback links, in order to reduce the number of feedback channels and simplify the beam signal correction process, and further reduce the cost and power consumption of the correction, this embodiment proposes a beam signal correction system that is different from the above embodiment. Referring to Figure 12, Figure 12 is a ninth structural diagram of the beam signal correction system, wherein the combining network integrates the RF analog signals output by the m-channel RF analog links into a first total analog signal, and then transmits the beam signal to be corrected converted from the first total analog signal to the nonlinear correction module and the target predistorter. Since the combining network will change the input factor of the nonlinear correction module, the calculation equation needs to be synchronously transformed when calculating the signal correction coefficient. For example, in one feasible method, the specific calculation steps are as follows:

[0094] Among them, [s a ] To integrate the obtained signal, it is necessary to decompose it into a matrix during the solution process:

[0095] Then, the solution is obtained to find that the output specific beam signal contains nonlinear parameters of the mutual coupling of all signals.

[0096] As an example, steps F10 to F30 include: combining the RF analog links output by all RF analog links into a first total analog signal corresponding to each of the RF analog signals through the combining network; converting the first total analog signal into the beam signal to be corrected through the first analog-to-digital converter; and transmitting the beam signal to be corrected to the target predistorter.

[0097] The feedback link includes a second analog-to-digital converter, and transmitting the beam signal to be corrected corresponding to each of the RF analog signals to the target predistorter through the feedback link includes:

[0098] Step G10, combining the RF analog signals into second total analog signals corresponding to the RF digital links respectively through the combining network;

[0099] Step G20: for any second total analog signal, convert the second total analog signal into a total radio frequency digital signal by the second analog-to-digital converter;

[0100] Step G30: transmitting the beam signal to be corrected corresponding to all the total RF digital signals to the target predistorter.

[0101] In this embodiment, since the signals are combined into one channel and then input into the nonlinear correction module for signal correction coefficients, there is also a need to disassemble the beam signal to be corrected to obtain a matrix corresponding to the number of links of the RF digital link, thereby laying the foundation for quickly calculating the signal correction coefficients. This embodiment proposes a beam signal correction system that is different from the above-mentioned embodiment. Referring to Figure 13, Figure 13 is a tenth structural diagram of the beam signal correction system, wherein the number of feedback channels corresponding to the second total analog signal corresponds to the number of links of the RF digital link.

[0102] As an example, steps G10 to G30: combine each of the RF analog signals into a second total analog signal corresponding to each of the RF digital links through the combining network; for any second total analog signal, convert the second total analog signal into a total RF digital signal through the second analog converter; and transmit the beam signal to be corrected corresponding to all the total RF digital signals to the target predistorter.

[0103] In this way, the RF analog signals of multiple RF analog links are combined into a second total analog signal equal to the number of links of the RF digital link, and then the analog signal is converted into a digital signal through a second analog-to-digital converter in each feedback channel to obtain a total RF digital signal. Finally, the beam signal to be corrected corresponding to the total RF digital signal is transmitted to the target predistorter, so that the nonlinear correction module does not need to perform matrix decomposition on the output signal of the combining network when calculating the signal correction coefficient, thereby laying the foundation for improving the calculation efficiency of the signal correction coefficient.

[0104] The embodiment of the present application provides a beam signal combining method. That is, the RF analog signals are combined into a first total analog signal corresponding to each of the RF analog signals through the combining network; the first total analog signal is converted into the beam signal to be corrected through the first analog-to-digital converter; the beam signal to be corrected is transmitted to the target predistorter. The embodiment of the present application combines the RF analog signals output by the RF analog link through the combining network to obtain a first total analog signal, and then converts the first total analog signal into the beam signal to be corrected through the first analog-to-digital converter, and finally transmits the beam signal to be corrected to the target predistorter. Since the combining network can save feedback channels and layout area, it can further save costs. At the same time, compared with traditional calibration schemes, due to the characteristics of the combining network, the purpose of obtaining the input of the nonlinear correction module can be achieved through fewer communication lines, so it lays the foundation for reducing the cost and power consumption of correction.

[0105] To achieve the above objectives, referring to FIG. 14 , the present application further provides a beam signal correction device, which is applied to a beam signal correction system. The beam signal correction system includes a feedback link, at least one radio frequency digital link, at least one radio frequency analog link, and a target predistorter corresponding to each of the radio frequency digital links. The beam signal correction device includes:

[0106] A generating module 101 is configured to generate a radio frequency analog signal corresponding to each of the radio frequency analog links according to the original digital signal of each of the radio frequency digital links, wherein the radio frequency analog signal is obtained by converting the original digital signal of each of the radio frequency digital links;

[0107] The transmission module 102 is configured to transmit the beam signal to be corrected corresponding to each of the RF analog signals to the target predistorter through the feedback link;

[0108] A calculation module 103 is configured to calculate a signal correction coefficient of the beam signal to be corrected based on the beam signal to be corrected and each of the original digital signals;

[0109] The correction module 104 is configured to correct the beam signal to be corrected in the target predistorter according to the signal correction coefficient.

[0110] In one embodiment, the RF digital link includes a first phase shifter, the RF analog link includes a first digital-to-analog converter, a first RF front-end link, and a first power amplifier, and the generating module 101 is further configured to:

[0111] Phase-shifting the original digital signals of all radio frequency digital links by the first phase shifter to obtain first beam digital signals corresponding to each of the radio frequency analog links;

[0112] For any first beam digital signal, convert the first beam digital signal into a first beam analog signal through the first digital-to-analog converter, and then transmit the first beam analog signal to the first power amplifier via the first RF front-end link;

[0113] The first beam analog signals of all radio frequency analog links are amplified into the radio frequency analog signals by the first power amplifiers.

[0114] In one embodiment, the radio frequency analog link includes a second phase shifter, a second digital-to-analog converter, a second radio frequency front-end link, and a second power amplifier, and the generating module 101 is further configured to:

[0115] For any of the original digital signals, convert the original digital signal into an original analog signal through the second digital-to-analog converter, and then transmit the original analog signal to the second phase shifter through the second RF front-end link, and perform phase shifting on all the original analog signals through the second phase shifter to obtain second beam analog signals corresponding to each of the RF analog links;

[0116] For any second beam analog signal, the second beam analog signal is amplified into the radio frequency analog signal by the second power amplifier.

[0117] In one embodiment, the RF analog link includes a third phase shifter, a phase shift link, and a third power amplifier, wherein the phase shift link includes a third digital-to-analog converter and a third RF front-end link, and the generating module 101 is further configured to:

[0118] For any of the original digital signals, dividing the original digital signal into at least one branch digital signal by the third phase shifter;

[0119] For any of the branched digital signals, convert the branched digital signal into a branched analog signal through the third digital-to-analog converter, and output the branched analog signal to the third phase shifter through the third RF front-end link;

[0120] Combining the branch analog signals into third beam analog signals corresponding to the radio frequency analog links respectively through the third phase shifters;

[0121] For any of the third beam analog signals, the third beam analog signal is amplified into the radio frequency analog signal by the third power amplifier.

[0122] In one embodiment, the RF digital link includes a fourth phase shifter, the RF analog link includes a fourth digital-to-analog converter, a fourth RF front-end link, and a fourth power amplifier, and the generating module 101 is further configured to:

[0123] Phase-shifting the original digital signals of all radio frequency digital links by the fourth phase shifter to obtain second beam digital signals corresponding to each radio frequency analog link;

[0124] Transmitting all second beam digital signals to their respective corresponding radio frequency analog links via the target predistorter;

[0125] For any second-beam digital signal, the second beam digital signal is converted into a fourth beam analog signal by the fourth digital-to-analog converter and then transmitted to the fourth power amplifier via the fourth RF front-end link, and the fourth beam analog signal is amplified into the RF analog signal by the fourth power amplifier.

[0126] In one embodiment, the beam signal correction system further includes a combining network, the feedback link includes a first analog-to-digital converter, and the transmission module 102 is further configured to:

[0127] combining the RF analog signals into a first total analog signal corresponding to the RF analog signals through the combining network;

[0128] Converting the first total analog signal into the beam signal to be corrected by the first analog-to-digital converter;

[0129] The beam signal to be corrected is transmitted to the target predistorter.

[0130] In one embodiment, the radio frequency digital link includes a fifth phase shifter, and the calculation module 104 is further configured to:

[0131] Combine the radio frequency analog signals into second total analog signals corresponding to the radio frequency digital links respectively through the combining network;

[0132] For any second total analog signal, convert the second total analog signal into a total radio frequency digital signal by the second analog-to-digital converter;

[0133] The beam signal to be corrected corresponding to all the total radio frequency digital signals is transmitted to the target predistorter.

[0134] The beam signal correction device provided in this application utilizes the beam signal correction method described in the aforementioned embodiments, resolving the technical issue of being unable to balance correction cost and effectiveness when correcting beam signals in a fully connected beamforming architecture. Compared to the prior art, the beam signal correction device provided in this application's embodiments achieves the same beneficial effects as the beam signal correction method described in the aforementioned embodiments. Other technical features of this device are the same as those disclosed in the aforementioned embodiments and are not further detailed here.

[0135] An embodiment of the present application provides a communication device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the beam signal correction method in the above-mentioned embodiment 1.

[0136] Reference is now made to FIG15 , which illustrates a schematic diagram of a communication device suitable for implementing embodiments of the present disclosure. The communication device in the embodiments of the present disclosure may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. The communication device illustrated in FIG15 is merely an example and should not limit the functionality or scope of use of the embodiments of the present disclosure.

[0137] As shown in FIG15 , the communication device may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. Various programs and data required for the operation of the communication device are also stored in the RAM 1004. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus.

[0138] Typically, the following systems may be connected to I / O interface 1006: input device 1007 including, for example, a touch screen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output device 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage device 1003 including, for example, a magnetic tape, hard disk, etc.; and communication device 1009. The communication device may allow the communication device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows a communication device with various systems, it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems may be implemented or have alternatively.

[0139] According to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication device 1009, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment of the present disclosure are performed.

[0140] The communication device provided in this application utilizes the beam signal correction method of the aforementioned embodiment, resolving the technical issue of being unable to balance correction cost and effectiveness when correcting beam signals in a fully connected beamforming architecture. Compared to the prior art, the communication device provided in this application embodiment achieves the same beneficial effects as the beam signal correction method provided in the aforementioned embodiment. Other technical features of this communication device are the same as those disclosed in the aforementioned embodiment and are not further detailed here.

[0141] The various parts of the present disclosure may be implemented in hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any appropriate manner in any one or more embodiments or examples.

[0142] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

[0143] This embodiment provides a computer-readable storage medium having computer-readable program instructions stored thereon, and the computer-readable program instructions are used to execute the beam signal correction method in the above-mentioned embodiment 1.

[0144] The computer-readable storage medium provided in the embodiment of the present application can be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. A more specific example of a computer-readable storage medium can include, but is not limited to, an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present embodiment, the computer-readable storage medium can be any tangible medium containing or storing a program that can be used by an instruction execution system, a system or a device or used in combination therewith. The program code contained in the computer-readable storage medium can be transmitted with any appropriate medium, including but not limited to: an electric wire, an optical cable, RF (radio frequency), etc., or any suitable combination thereof.

[0145] The computer-readable storage medium may be included in the communication device, or may exist independently without being incorporated into the communication device.

[0146] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the communication device, the communication device: generates a radio frequency analog signal corresponding to each of the radio frequency analog links according to the original digital signal of each of the radio frequency digital links, wherein the radio frequency analog signal is obtained by converting the original digital signals of each of the radio frequency digital links; transmits the beam signal to be corrected corresponding to each of the radio frequency analog signals to the target predistorter through the feedback link; calculates the signal correction coefficient of the beam signal to be corrected according to the beam signal to be corrected and each of the original digital signals; and corrects the beam signal to be corrected in the target predistorter according to the signal correction coefficient.

[0147] Computer program code for performing the operations of the present disclosure may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0148] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0149] The modules involved in the embodiments described in this disclosure may be implemented in software or hardware, wherein the name of a module does not necessarily limit the unit itself.

[0150] The computer-readable storage medium provided in this application stores computer-readable program instructions for executing the aforementioned beam signal correction method, resolving the technical issue of balancing correction cost and effectiveness when correcting beam signals in a fully connected beamforming architecture. Compared to the prior art, the beneficial effects of the computer-readable storage medium provided in this embodiment of the application are similar to those of the beam signal correction method provided in the aforementioned embodiment and are not further elaborated here.

[0151] The above are only some embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent scope of the present application.

Claims

1. A beam signal correction method, wherein: Applied to a beam signal correction system, the beam signal correction system includes a feedback link, at least one radio frequency digital link, at least one radio frequency analog link, and a target predistorter corresponding to each of the radio frequency digital links, and the beam signal correction method includes: Generate a radio frequency analog signal corresponding to each of the radio frequency analog links according to the original digital signal of each of the radio frequency digital links, wherein the radio frequency analog signal is obtained by converting the original digital signal of each of the radio frequency digital links; Transmitting the beam signal to be corrected corresponding to each of the RF analog signals to the target predistorter through the feedback link; Calculating a signal correction coefficient of the beam signal to be corrected according to the beam signal to be corrected and each of the original digital signals; The to-be-corrected beam signal is corrected in the target predistorter according to the signal correction coefficient.

2. The beam signal correction method according to claim 1, wherein: The radio frequency digital link includes a first phase shifter, and the radio frequency analog link includes a first digital-to-analog converter, a first radio frequency front-end link and a first power amplifier. Generating the RF analog signals corresponding to the RF analog links respectively according to the original digital signals of the RF digital links includes: Phase-shifting the original digital signals of all radio frequency digital links by the first phase shifter to obtain first beam digital signals corresponding to each of the radio frequency analog links; For any first beam digital signal, convert the first beam digital signal into a first beam analog signal through the first digital-to-analog converter and then transmit the first beam analog signal to the first power amplifier via the first RF front-end link; The first beam analog signals of all radio frequency analog links are amplified into the radio frequency analog signals by the first power amplifiers.

3. The beam signal correction method according to claim 1, wherein: The radio frequency analog link includes a second phase shifter, a second digital-to-analog converter, a second radio frequency front-end link and a second power amplifier. Generating the RF analog signals corresponding to the RF analog links respectively according to the original digital signals of the RF digital links includes: For any of the original digital signals, convert the original digital signal into an original analog signal through the second digital-to-analog converter and transmit the signal to the second phase shifter via the second RF front-end link, and perform phase shifting on all the original analog signals through the second phase shifter to obtain second beam analog signals corresponding to each of the RF analog links; For any second beam analog signal, the second beam analog signal is amplified into the radio frequency analog signal by the second power amplifier.

4. The beam signal correction method according to claim 1, wherein: The radio frequency analog link includes a third phase shifter, a phase shift link and a third power amplifier, wherein the phase shift link includes a third digital-to-analog converter and a third radio frequency front-end link, Generating the RF analog signals corresponding to the RF analog links respectively according to the original digital signals of the RF digital links includes: For any of the original digital signals, the original digital signal is divided into at least one branch digital signal by the third phase shifter; For any of the branched digital signals, convert the branched digital signal into a branched analog signal through the third digital-to-analog converter, and output the branched analog signal to the third phase shifter through the third RF front-end link; Combining the branch analog signals into third beam analog signals corresponding to the radio frequency analog links respectively through the third phase shifters; For any of the third beam analog signals, the third beam analog signal is amplified into the radio frequency analog signal by the third power amplifier.

5. The beam signal correction method according to claim 1, wherein: The radio frequency digital link includes a fourth phase shifter, the radio frequency analog link includes a fourth digital-to-analog converter, a fourth radio frequency front-end link and a fourth power amplifier, Generating the RF analog signals corresponding to the RF analog links respectively according to the original digital signals of the RF digital links includes: Phase shifting is performed on the original digital signals of all radio frequency digital links by the fourth phase shifter to obtain second beam digital signals corresponding to each of the radio frequency analog links; Transmitting all second beam digital signals to their respective corresponding radio frequency analog links via the target predistorter; For any of the second beam digital signals, the second beam digital signal is converted into a fourth beam analog signal by the fourth digital-to-analog converter and then transmitted to the fourth power amplifier via the fourth RF front-end link, and the fourth beam analog signal is amplified into the RF analog signal by the fourth power amplifier.

6. The beam signal correction method according to any one of claims 1 to 5, wherein: The beam signal correction system further includes a combining network, the feedback link includes a first analog-to-digital converter, The step of transmitting the beam signal to be corrected corresponding to each of the RF analog signals to the target predistorter through the feedback link includes: Combine the RF analog signals into a first total analog signal corresponding to the RF analog signals through the combining network; Converting the first total analog signal into the beam signal to be corrected by the first analog-to-digital converter; The to-be-corrected beam signal is transmitted to the target predistorter.

7. The beam signal correction method according to claim 1, wherein: The radio frequency digital link comprises a fifth phase shifter, The calculating, according to the beam signal to be corrected and each of the original digital signals, a signal correction coefficient of the beam signal to be corrected comprises: Phase-shift all original digital signals into third beam digital signals respectively corresponding to each of the radio frequency analog links through the fifth phase shifter; A signal correction coefficient of the beam signal to be corrected is calculated according to the beam signal to be corrected and each of the third beam digital signals.

8. The beam signal correction method according to claim 6, wherein: The feedback link comprises a second analog-to-digital converter, The step of transmitting the beam signal to be corrected corresponding to each of the RF analog signals to the target predistorter through the feedback link includes: Combine the radio frequency analog signals into second total analog signals respectively corresponding to the radio frequency digital links through the combining network; For any second total analog signal, convert the second total analog signal into a total radio frequency digital signal by the second analog-to-digital converter; The beam signal to be corrected corresponding to all the total radio frequency digital signals is transmitted to the target predistorter.

9. A communication device, wherein: The communication equipment includes: at least one processor; and, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one The processor is capable of executing the steps of the beam signal correction method described in any one of claims 1 to 8.

10. A computer-readable storage medium, wherein: The computer-readable storage medium stores a program for implementing the beam signal correction method, and the program for implementing the beam signal correction method is executed by a processor to implement the steps of the beam signal correction method as claimed in any one of claims 1 to 8.

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