WO2019090693A1

WO2019090693A1 - Method and device for performing digital pre-distortion processing during beam forming

Info

Publication number: WO2019090693A1
Application number: PCT/CN2017/110447
Authority: WO
Inventors: 赵光玲
Original assignee: 上海诺基亚贝尔股份有限公司
Priority date: 2017-11-10
Filing date: 2017-11-10
Publication date: 2019-05-16
Also published as: CN111226397A; CN111226397B

Abstract

The present invention aims to provide a method and device for use in performing digital pre-distortion processing during beam forming; compared to the existing technology, the present invention selects a reference power amplifier (PA) channel from a wireless radio frequency channel corresponding to beam forming, and corrects a pre-stored beam forming weight according to a phase difference in the amplitude of another PA channel relative to the reference PA channel so as to satisfy a forming condition for an ideal beam; since the phase difference of the amplitudes is caused by differences in PA properties, the corrected beam weight eliminates such differences such that digital pre-distortion (DPD) designed for a reference PA may also be used for all of the PAs, and thus the adjacent channel power ratio (ACPR) of each PA complies with requirements, while beam shape is close to the ideal beam.

Description

Method and device for performing digital predistortion processing in beamforming

Technical field

The present invention relates to the field of communications technologies, and in particular, to a technique for performing digital predistortion processing in beamforming. .

Background technique

In the 5G large-scale multi-output (Multiple Input Multiple Output) application, due to the existence of many antennas, it is impossible to apply a dedicated DPD (Digital Pre-Distortion) for each PA (Power Amplifier). distortion). For example, in RF (radio frequency) beamforming, an RF channel can have many active antennas and their corresponding PAs. For many physical reasons, it is difficult to make all PAs have the same performance. Therefore, a single DPD of a selected PA cannot be used for other PAs, otherwise the ACPR (Adjacent Channel Power Ratio) of the antenna array will be poor, and the radiation pattern of the beam is not required. That one. To make PA production easier, less costly, and the beam pattern required is more accurate, the compensator should be designed so that the single DPD can be applied to all PAs.

In the prior art, in order to solve the above problem, phase unwinding is usually performed in all feedback paths at first, and then DPD is estimated for all PAs in a cascade manner. However, this method is too complicated for large antenna arrays and is not feasible. Multiple feedback paths will introduce synchronization issues.

Summary of the invention

It is an object of the present invention to provide a method and apparatus for digital predistortion processing in beamforming.

According to an aspect of the invention, a method of performing digital predistortion processing in beamforming is provided, wherein the method comprises:

a selecting a reference PA channel in the radio frequency channel corresponding to the beamforming, and performing digital predistortion processing on the reference PA channel;

b correcting the beamforming weights pre-stored by the remaining PA channels according to the output signals of the reference PA channel and the respective output signals of the remaining PA channels in the radio frequency channel at the same time;

And performing beamforming on the radio frequency channel according to the beamforming weight of the reference PA channel and the beamforming weights of the remaining respective PA channels.

Preferably, the step b comprises:

Performing delay processing on the reference PA channel to synchronize with other PA channels in the radio frequency channel;

Wherein, the step c includes:

The radio frequency channel is beamformed according to the delayed beamforming weight of the reference PA channel and the corrected beamforming weights of the remaining respective PA channels.

Preferably, the method comprises:

The input signals are equally divided to obtain a plurality of the radio frequency channels, wherein each of the radio frequency channels has the same power value.

Preferably, the step b comprises:

Correcting the pre-stored beams of the remaining PA channels by using an analog multiplier and/or an analog divider according to an output signal of the reference PA channel and respective outputs of the remaining PA channels in the radio frequency channel at the same time Forming weights.

Preferably, the step b comprises:

Obtaining pre-stored beamforming weights of the remaining PA channels in the radio frequency channel from the original codebook;

And correcting beamforming weights pre-stored by the remaining PA channels according to the output signals of the reference PA channel and the respective output signals of the remaining PA channels in the radio frequency channel at the same time.

Preferably, the antenna array corresponding to the beamforming is linearly consistent.

According to another aspect of the present invention, there is also provided a processing apparatus for performing digital predistortion processing in beamforming, wherein the processing apparatus comprises:

a selecting device, configured to select a reference PA channel in the radio frequency channel corresponding to the beamforming, and perform digital predistortion processing on the reference PA channel;

a correction device, configured to correct, according to the output signal of the reference PA channel, and the output signals of the remaining PA channels in the radio frequency channel at the same time, the pre-stored beam shaping weights of the remaining PA channels;

And an executing device, configured to perform beamforming on the radio frequency channel according to a beamforming weight of the reference PA channel and a beamforming weight of the remaining each PA channel.

Preferably, the correction device is for:

Wherein the execution device is used to:

Preferably, the processing device comprises:

The equalizing device is configured to divide the input signals to obtain a plurality of the radio frequency channels, wherein each of the radio frequency channels has the same power value.

Preferably, the correction device is for:

According to an output signal of the reference PA channel, and the radio frequency channel thereof Each of the output signals of the respective PA channels at the same time corrects the beamforming weights pre-stored by the remaining PA channels.

Compared with the prior art, the present invention selects a reference PA channel in the radio frequency channel corresponding to the beamforming, performs digital predistortion processing on the reference PA channel, according to the output signal of the reference PA channel, and the wireless Each of the output signals of the remaining PA channels in the RF channel at the same time corrects the beamforming weights pre-stored by the remaining PA channels, and further, according to the beam shaping weight of the reference PA channel, and the remaining PA channels Correcting the beamforming weights, performing beamforming on the radio frequency channels, correcting the output signals of the radio frequency channels to be consistent, greatly improving the spectrum and radiation pattern of the beamforming, and adopting this manner The orientation of the antenna array corresponding to the beamforming does not change, but the corresponding sidelobe value is adjusted. According to the amplitude phase difference of other PA channels with respect to the reference PA channel, the present invention corrects the previously stored beam weights to satisfy the ideal beam forming conditions. Since these amplitude phase differences are caused by the difference in characteristics of the PA, the modified The beamforming weights eliminate these differences, so that the DPD designed for the reference PA can also be used for all PAs, so that the ACPR of each PA meets the requirements while making the beam shape close to the ideal beam.

DRAWINGS

Other features, objects, and advantages of the present invention will become more apparent from the Detailed Description of Description

1 shows a flow chart of a method of performing digital predistortion processing in beamforming in accordance with an aspect of the present invention;

2 is a diagram showing digital predistortion processing in beamforming in accordance with a preferred embodiment of the present invention;

3 to 6 are schematic views showing digital predistortion processing according to the prior art;

7 to 8 are diagrams showing digital predistortion processing in beamforming in accordance with another preferred embodiment of the present invention;

Figure 9 is a diagram showing digital predistortion processing according to the prior art;

10 to 11 are diagrams showing digital predistortion processing in beamforming in accordance with another preferred embodiment of the present invention;

Figure 12 shows the radiation pattern of the compensated and uncompensated beams.

The same or similar reference numerals in the drawings denote the same or similar components.

Detailed ways

The term "base station" as used herein may be considered synonymous with and may hereinafter sometimes be referred to as a Node B, an evolved Node B, an eNodeB, an eNB, a Transceiver Base Station (BTS), RNC and the like, and can describe a transceiver that communicates with and provides wireless resources to a mobile terminal in a wireless communication network that can span multiple technology generations. In addition to the ability to implement the methods discussed herein, the base stations discussed herein can have all of the functionality associated with conventional well-known base stations.

The methods discussed below can be implemented in hardware, software, firmware, middleware, microcode, hardware description languages, or any combination thereof. When implemented in software, firmware, middleware or microcode, the program code or code segments to carry out the necessary tasks can be stored in a machine or computer readable medium, such as a storage medium. The processor(s) can perform the necessary tasks.

The specific structural and functional details disclosed are merely representative and are for the purpose of describing exemplary embodiments of the invention. The present invention may, however, be embodied in many alternative forms and should not be construed as being limited only to the embodiments set forth herein. It should be understood that although the terms "first," "second," etc. may be used herein to describe the various elements, these elements should not be limited by these terms. These terms are used only to distinguish one unit from another. For example, a first unit could be termed a second unit, and similarly a second unit could be termed a first unit, without departing from the scope of the exemplary embodiments. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.

It should be understood that when a unit is referred to as "connected" or "coupled" to another order In meta time, it may be directly connected or coupled to the other unit, or an intermediate unit may be present. In contrast, when a unit is referred to as being "directly connected" or "directly coupled" to another unit, there is no intermediate unit. Other words used to describe the relationship between the units should be interpreted in a similar manner (eg "between" and "directly between" and "adjacent to" Than "directly adjacent to", etc.).

The terminology used herein is for the purpose of describing the particular embodiments, The singular forms "a", "an", It is also to be understood that the terms "comprising" and """ Other features, integers, steps, operations, units, components, and/or combinations thereof.

It should also be noted that, in some alternative implementations, the functions/acts noted may occur in a different order than that illustrated in the drawings. For example, two figures shown in succession may in fact be executed substantially concurrently or sometimes in the reverse order, depending on the function/acts involved.

All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It should also be understood that, unless explicitly defined herein, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be idealized. Or too formal meaning to explain.

The invention is further described in detail below with reference to the accompanying drawings.

1 shows a flow chart of a method of performing digital predistortion processing in beamforming in accordance with an aspect of the present invention.

In step S101, the processing device 1 selects a reference PA channel in the radio frequency channel corresponding to the beamforming, and performs digital predistortion processing on the reference PA channel.

Specifically, the beamforming has a corresponding radio frequency channel, and in step S101, The processing device 1 can select a radio frequency channel as a reference PA channel and perform digital pre-distortion (DPD) processing on the reference PA channel, which can be, for example, a conventional digital pre-distortion process.

Here, it is assumed that the antenna array corresponding to the beamforming is linearly uniform.

In step S102, the processing device 1 corrects the pre-stored beamforming of the remaining PA channels according to the output signal of the reference PA channel and the respective output signals of the remaining PA channels in the radio frequency channel at the same time. Weights.

Specifically, each radio frequency channel may have a corresponding beamforming weight in advance. For example, if two radio frequency channels are used, one of the radio frequency channels selected as the reference PA channel has a beamforming weight of w ₀ . The output communication signal flow is x ₀ , and the other radio frequency channel has a beamforming weight of w ₁ . Since different PAs have different performances, it is assumed that the output communication signal flow of the other radio frequency channel becomes x ₁ , then in step S102, the processing apparatus 1 according to the reference output signal x ₀ PA passage, and the passage radio frequency channel PA output signal remaining the same time x _1, the corrected remaining PA beamforming channels prestored The shape weight w ₁ , then the remaining PA channel modified beam weights are as follows:

It should be understood by those skilled in the art that the above parameters are merely examples, and should not impose any practical limitations on the present invention. Other existing or future possible parameter information, such as may be applicable to the present invention, shall also be included in the present invention. It is covered by the scope of protection and is hereby incorporated by reference.

Preferably, in step S102, the processing device 1 utilizes an analog multiplier and/or an analog divider according to an output signal of the reference PA channel and respective outputs of the remaining PA channels in the radio frequency channel at the same time. The beamforming weights pre-stored by the remaining respective PA channels are corrected.

Specifically, in step S102, the processing device 1 can implement the above functions by using an analog multiplier and/or an analog divider, for example, the corrected beam of another radio frequency channel calculated by the processing device 1 described in the previous example. Forming weight

The first processing device 1 may output a communication signal stream output communication signal stream x ₀ is chosen as the reference radio channel PA radio frequency channel and other radio frequency channels x _1, analog divider, to obtain

And then using the analog multiplier to obtain the corrected beamforming weight according to the pre-stored beamforming weight w _{1 of} the other radio frequency channel.

Preferably, in step S102, the processing device 1 acquires pre-stored beamforming weights of the remaining PA channels in the radio frequency channel from the original codebook; according to the output signal of the reference PA channel, and the wireless Each output signal of the remaining PA channels in the RF channel at the same time corrects the beam shaping weights pre-stored by the remaining PA channels.

Specifically, the beamforming weights of the respective radio frequency channels may be previously stored in the original codebook. In step S102, the processing device 1 acquires pre-stored beamforming of each radio frequency channel from the original codebook. Weights, these pre-stored beamforming weights include both pre-stored beamforming weights of the reference PA channel, and pre-stored beamforming weights of the remaining PA channels; where the beamforming weights are prior The weight of the ideal beam stored in the original codebook. Then, according to the output signal of the reference PA channel and the output signals of the remaining PA channels in the radio frequency channel at the same time, calculate new beamforming weights of the remaining PA channels, thereby pre-storing the Beamforming weights are corrected. Here, the processing device 1 obtains the weight of the ideal beam from the original codebook, and the analog signals of the remaining PA channels in the radio frequency channel with respect to the reference PA channel, and then corrects the new beam according to the ideal beam weight. Forming weights.

For example, suppose the beamforming has four radio frequency channels, one of which is selected as the radio channel of the reference PA channel, and the pre-stored beamforming weight is w ₀ , and the corresponding output communication signal stream is x ₀ , the 4 The pre-stored beamforming weights of the remaining PA channels in the radio frequency channel are w ₁ , w ₂ , w ₃ , respectively, and the corresponding output signal streams are x ₁ , x ₂ , x ₃ , beam-formed codebooks, respectively. as follows:

Beam point is

If all PAs are the same, the ideal beam would be the following formula:

y=x ₀ w ₀ +x ₀ w ₁ +x ₀ w ₂ +x ₀ w ₃ w ₀ =1

However, due to the inconsistency of the PA performance, in step S102, the processing device 1 recalculates the new beamforming weights of the remaining PA channels, thereby correcting the pre-stored beamforming weights, applying the following equation:

among them,

That is, the beamforming weights of the remaining PA channels are corrected.

In step S103, the processing device 1 performs beamforming on the radio frequency channel according to the beamforming weight of the reference PA channel and the beamforming weights of the remaining PA channels.

Specifically, after the processing device 1 corrects the beam shaping weights stored in the remaining PA channels in advance to obtain the beam shaping weights of the remaining PA channels, in step S103, the processing device 1 according to the The modified beamforming weights, and the unaltered pre-stored beamforming weights of the reference PA channel, perform beamforming on the radio frequency channels such that the output signals of the radio frequency channels Corrected to the same, greatly improving the spectrum and radiation pattern of the beamforming.

In this way, the orientation of the antenna array corresponding to the beamforming is not changed, but the corresponding sidelobe value is adjusted.

Preferably, in step S102, the processing device 1 performs delay processing on the reference PA channel to synchronize with the remaining PA channels in the radio frequency channel; wherein, in step S103, the processing device 1 is based on the delay. The beam shaping weight of the reference PA channel, and the modified beamforming weights of the remaining PA channels, beamforming the radio frequency channel.

Specifically, since the analog PA multiplier and/or the analog divider are required to process the remaining PA channels in the radio frequency channel, the processing is not required for the reference PA channel, and therefore, in step S102, the processing device 1 It is also necessary to delay processing the reference PA channel to synchronize with the remaining PA channels in the radio frequency channel.

For example, as shown in Figure 2, a compensated beamforming weight vector is designed to be applied to each PA. The communication signal stream x ₀ is transmitted and then converted into an analog waveform by a DAC (Digital-to-Analog Converter). This signal is divided into n branches, where n = 4 is assumed. Select one of the radio frequency channels, channel 1 as shown in Figure 2 as the reference PA channel, to perform DPD as usual. Therefore, the DPD will be the unified DPD that all PAs perform. It can also be seen in Figure 2 that a delay unit is applied in the reference PA channel, which can be compensated for in production. The bandwidth of the analog computing circuit should be wide enough.

Beamformed codebook is

Beam point is

Here, it is assumed that the antenna array is linearly uniform.

If all PAs are the same, the ideal beam would be y = x ₀ w ₀ + x ₀ w ₁ + x ₀ w ₂ + x ₀ w ₃ w ₀ =1. However, due to the inconsistency of the PA performance, the following equation can be applied, and the difference between x ₀ is extracted by the dividing circuit to obtain the phase difference and the amplitude difference.

Through the above derivation, the weight of beamforming is a time-varying vector modulator (VM) that accumulates the difference in PA. The modified beamforming weights of these radio frequency channels cause the antenna array to again coincide with the reference PA channel, and thus the spectrum and radiation pattern of the beamforming is greatly improved. The original beamform codebook is applied to the vector modulator.

Preferably, the method further comprises a step S104 (not shown). In step S104, the processing device 1 divides the input signals to obtain a plurality of the radio frequency channels, wherein the power values of each of the radio frequency channels are the same.

Specifically, in step S104, the input signal of the beamforming by the processing device 1 can be equally divided. For example, in the previous example, the input signal is divided into n branches, each branch having the same power, where n= 4, you can get 4 wireless RF channels, where each wireless RF channel has the same power value.

3 to 11 respectively show the prior art and the advantageous effects after the application of the present invention.

Figure 3 shows the spectrum of an antenna array with 4 PAs in the prior art, which are slightly different.

Figure 4 shows the spectrum of one of the PA1s of Figure 3, which is used as a reference PA in the simulation.

FIG. 5 shows the spectrum of the reference PA in FIG. 4 after performing DPD.

Figure 6 shows the spectrum of the beam for the single DPD of the reference PA applied directly to all PAs without any compensation.

Figure 7 shows the frequency spectrum in which the present invention is applied. As can be seen from Figure 6 to Figure 7, the ACPR is large. It is reduced by about 30 dB, which means that it is not feasible to directly apply a single DPD of the reference PA to all the PAs as shown in FIG.

Figure 8 shows the AM-AM (amplitude) curve of the compensated beam of the present invention. It is linear and has no saturation bending.

Figure 9 shows that a single DPD with reference PA is applied directly to all PAs, but without compensation, it can be seen that it has no effect at all.

Figures 10 and 11 show the difference in phase and amplitude between the reference PA channel and the other PA channels. The difference can be seen as a linear distribution and can be represented by a set of mean or linear values. Unfortunately, these linear models cannot be used for the entire analog signal and cannot be compensated in the digital domain. It can be seen that the problem cannot be solved with a simple linear fit.

Figure 12 shows the radiation pattern of the compensated and uncompensated beams. The shape of the beam due to the difference in PA characteristics is not compensated. Although the direction is unchanged, the amplitude of the main lobe becomes smaller, the side lobes increase, and these deteriorations vary with the difference of PA. The greater the difference, the more serious the deterioration. The compensated beam will be close to the ideal beam.

The beneficial effects of the present invention are that it is simple and effective and will relax the production requirements of the PA. The present invention enhances the robustness of the RF system in which some compensation mechanisms must be used, otherwise the risk will be high due to the unsatisfactory inconsistency of the PA. If it does, the only way is to backoff the work point, but it will deviate from the original intention of the DPD.

According to another aspect of the present invention, there is also provided a processing apparatus for performing digital predistortion processing in beamforming, wherein the processing apparatus 1 includes a selecting means, a correcting means, and an executing means.

The selection device selects a reference PA channel in the radio frequency channel corresponding to the beamforming, and performs digital predistortion processing on the reference PA channel.

Specifically, the beamforming has a corresponding radio frequency channel, and the selecting device can select one radio frequency channel as the reference PA channel, and perform digital pre-distortion (DPD) processing on the reference PA channel, for example, the digital pre-distortion processing may be Traditional digital predistortion processing.

The correcting means corrects the beam shaping weights pre-stored by the remaining PA channels according to the output signals of the reference PA channel and the respective output signals of the remaining PA channels in the radio frequency channel at the same time.

Specifically, each radio frequency channel may have a corresponding beamforming weight in advance. For example, if two radio frequency channels are used, one of the radio frequency channels selected as the reference PA channel has a beamforming weight of w ₀ . The output communication signal flow is x ₀ , and the other radio frequency channel has a beamforming weight of w ₁ . Since different PAs have different performances, it is assumed that the output communication signal flow of the other radio frequency channel becomes x ₁ , the correction means based on the output signal x ₀ of the reference PA channel, and the radio frequency channel to rest PA channel output signal in the same timing x _1, fix the beamforming weights of the remaining channels previously stored weight w _1, the The beamforming weights of the remaining PA channels are as follows:

Preferably, the correcting means corrects the remaining PAs by using an analog multiplier and/or an analog divider according to an output signal of the reference PA channel and respective outputs of the remaining PA channels in the radio frequency channel at the same time. The beam pre-stored beamforming weights.

Specifically, the correcting means can implement the above functions by means of an analog multiplier and/or an analog divider, for example, the processing device 1 described in the previous example calculates

Modified beamforming weights for another radio frequency channel

The first correction means may output the communication signal stream output communication signal stream x ₀ is chosen as the reference radio channel PA radio frequency channel and other radio frequency channels x _1, analog divider, to obtain

Preferably, the correcting means acquires pre-stored beamforming weights of the remaining PA channels in the radio frequency channel from the original codebook; and according to the output signal of the reference PA channel, and the remaining PAs in the radio frequency channel Each output signal of the channel at the same time corrects the beamforming weights pre-stored by the remaining PA channels.

Specifically, the beamforming weights of the respective radio frequency channels may be pre-stored in the original codebook, and the correcting device obtains pre-stored beamforming weights of the respective radio frequency channels from the original codebook, and these pre-stored weights. The beamforming weight includes both pre-stored beamforming weights of the reference PA channel, and pre-stored beamforming weights of the remaining PA channels; wherein the beamforming weights are pre-stored in the original codebook The weight of the ideal beam in . Then, according to the output signal of the reference PA channel and the output signals of the remaining PA channels in the radio frequency channel at the same time, calculate new beamforming weights of the remaining PA channels, thereby pre-storing the Beamforming weights are corrected. Here, the correcting device obtains the weight of the ideal beam from the original codebook, and the analog signals of the remaining PA channels in the radio frequency channel with respect to the reference PA channel, and then corrects the new beam according to the ideal beam weight. Shape weight.

For example, suppose the beamforming has four radio frequency channels, one of which is selected as the radio channel of the reference PA channel, and the pre-stored beamforming weight is w ₀ , and the corresponding output communication signal stream is x ₀ , the 4 The pre-stored beamforming weights of the remaining PA channels in the radio frequency channel are w ₁ , w ₂ , w ₃ , respectively, and the corresponding output signal streams are x ₁ , x ₂ , x ₃ , beam-formed codebooks. as follows:

Beam point is

If all PAs are the same, the ideal beam would be the following formula:

y=x ₀ w ₀ +x ₀ w ₁ +x ₀ w ₂ +x ₀ w ₃ w ₀ =1

However, due to the inconsistency of the PA performance, the correction device recalculates the new beamforming weights of the remaining PA channels, thereby correcting the pre-stored beamforming weights, applying the following equation:

among them,

That is, the beamforming weights of the remaining PA channels are corrected.

The executing device performs beamforming on the radio frequency channel according to the beamforming weight of the reference PA channel and the beamforming weights of the remaining respective PA channels.

Specifically, after the modifying device corrects the beamforming weights pre-stored by the remaining PA channels to obtain the beamforming weights of the remaining PA channels, the performing device determines the weights according to the modified beam, and the reference PA. The channel's unaltered pre-stored beamforming weights are used to perform beamforming on these radio frequency channels, thereby correcting the output signals of these radio frequency channels to a uniformity, greatly improving the spectrum and radiation pattern of the beamforming.

Preferably, the correcting means delays the reference PA channel to make it Synchronizing the remaining PA channels in the radio frequency channel; wherein, the executing device is configured to perform the radio beam shaping weight of the reference PA channel after the delay, and the modified beamforming weights of the remaining PA channels, to the wireless device The RF channel is beamformed.

Specifically, since the analog PA multiplier and/or the analog divider are required to process the remaining PA channels in the radio frequency channel, and the reference PA channel does not need to perform such processing, the correction device also needs to refer to the reference. The PA channel is delayed to synchronize with the remaining PA channels in the radio frequency channel.

Beamformed codebook is

Beam point is

Here, it is assumed that the antenna array is linearly uniform.

Through the above derivation, the weight of beamforming is a time-varying vector modulator (VM) that accumulates the difference in PA. The modified beamforming weights of these radio frequency channels cause the antenna array to again coincide with the reference PA channel, and thus the spectrum and radiation pattern of the beamforming is greatly improved. The original beamforming codebook is applied In this vector modulator.

Preferably, the processing device 1 further comprises a sharing device (not shown). The equalizing device divides the input signals to obtain a plurality of the radio frequency channels, wherein each of the radio frequency channels has the same power value.

Specifically, the equalization device can equally divide the beamformed input signal. For example, in the previous example, the input signal is divided into n branches, each branch having the same power. Here, if n=4, it can be obtained. 4 wireless RF channels, wherein each wireless RF channel has the same power value.

It should be noted that the present invention can be implemented in software and/or a combination of software and hardware, for example, using an application specific integrated circuit (ASIC), a general purpose computer, or any other similar hardware device. In one embodiment, the software program of the present invention may be executed by a processor to implement the steps or functions described above. Likewise, the software program (including related data structures) of the present invention can be stored in a computer readable recording medium such as a RAM memory, a magnetic or optical drive or a floppy disk and the like. Additionally, some of the steps or functions of the present invention may be implemented in hardware, for example, as a circuit that cooperates with a processor to perform various steps or functions.

Additionally, a portion of the invention can be applied as a computer program product, such as computer program instructions, which, when executed by a computer, can invoke or provide a method and/or solution in accordance with the present invention. The program instructions for invoking the method of the present invention may be stored in a fixed or removable recording medium and/or transmitted by a data stream in a broadcast or other signal bearing medium, and/or stored in a The working memory of the computer device in which the program instructions are run. Here, an embodiment in accordance with the present invention includes a device including storage for storing computer program instructions And a processor for executing program instructions, wherein when the computer program instructions are executed by the processor, the apparatus is triggered to operate based on the methods and/or technical solutions described above in accordance with various embodiments of the present invention.

It is apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the invention is defined by the appended claims instead All changes in the meaning and scope of equivalent elements are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim. In addition, it is to be understood that the word "comprising" does not exclude other elements or steps. A plurality of units or devices recited in the device claims may also be implemented by a unit or device by software or hardware. The first, second, etc. words are used to denote names and do not denote any particular order.

Claims

A method for performing digital predistortion processing in beamforming, wherein the method comprises:

a selecting a reference PA channel in the radio frequency channel corresponding to the beamforming, and performing digital predistortion processing on the reference PA channel;

b correcting the beamforming weights pre-stored by the remaining PA channels according to the output signals of the reference PA channel and the respective output signals of the remaining PA channels in the radio frequency channel at the same time;

And performing beamforming on the radio frequency channel according to the beamforming weight of the reference PA channel and the beamforming weights of the remaining respective PA channels.
The method of claim 1 wherein said step b comprises:

Performing delay processing on the reference PA channel to synchronize with other PA channels in the radio frequency channel;

Wherein, the step c includes:

The radio frequency channel is beamformed according to the delayed beamforming weight of the reference PA channel and the corrected beamforming weights of the remaining respective PA channels.
The method of claim 1 or 2, wherein the method comprises:

The input signals are equally divided to obtain a plurality of the radio frequency channels, wherein each of the radio frequency channels has the same power value.
The method of claim 1 or 2, wherein said step b comprises:

Correcting the pre-stored beams of the remaining PA channels by using an analog multiplier and/or an analog divider according to an output signal of the reference PA channel and respective outputs of the remaining PA channels in the radio frequency channel at the same time Forming weights.
The method of claim 1 or 2, wherein said step b comprises:

Obtaining pre-stored beamforming weights of the remaining PA channels in the radio frequency channel from the original codebook;

And correcting beamforming weights pre-stored by the remaining PA channels according to the output signals of the reference PA channel and the respective output signals of the remaining PA channels in the radio frequency channel at the same time.
The method according to claim 1 or 2, wherein the antenna array corresponding to the beamforming is linearly uniform.
A processing device for performing digital predistortion processing in beamforming, wherein the processing device comprises:

a selecting device, configured to select a reference PA channel in the radio frequency channel corresponding to the beamforming, and perform digital predistortion processing on the reference PA channel;

a correction device, configured to correct, according to the output signal of the reference PA channel, and the output signals of the remaining PA channels in the radio frequency channel at the same time, the pre-stored beam shaping weights of the remaining PA channels;

And an executing device, configured to perform beamforming on the radio frequency channel according to a beamforming weight of the reference PA channel and a beamforming weight of the remaining each PA channel.
The processing device according to claim 7, wherein said correcting means is for:

Performing delay processing on the reference PA channel to synchronize with other PA channels in the radio frequency channel;

Wherein the execution device is used to:

The radio frequency channel is beamformed according to the delayed beamforming weight of the reference PA channel and the corrected beamforming weights of the remaining respective PA channels.
The processing device according to claim 7 or 8, wherein the processing device comprises:

The equalizing device is configured to divide the input signals to obtain a plurality of the radio frequency channels, wherein each of the radio frequency channels has the same power value.
A processing apparatus according to claim 7 or 8, wherein said correcting means is for:

Correcting the pre-stored beams of the remaining PA channels by using an analog multiplier and/or an analog divider according to an output signal of the reference PA channel and respective outputs of the remaining PA channels in the radio frequency channel at the same time Forming weights.
A processing apparatus according to claim 7 or 8, wherein said correcting means is for:

Obtaining pre-stored beamforming weights of the remaining PA channels in the radio frequency channel from the original codebook;

And correcting beamforming weights pre-stored by the remaining PA channels according to the output signals of the reference PA channel and the respective output signals of the remaining PA channels in the radio frequency channel at the same time.
The processing device according to claim 7 or 8, wherein the antenna array corresponding to the beamforming is linearly uniform.