WO2016187889A1

WO2016187889A1 - Signal processing method and power amplification device

Info

Publication number: WO2016187889A1
Application number: PCT/CN2015/080130
Authority: WO
Inventors: 游飞; 韦前华; 江中坡
Original assignee: 华为技术有限公司; 电子科技大学
Priority date: 2015-05-28
Filing date: 2015-05-28
Publication date: 2016-12-01

Abstract

The present invention relating to a communication system provides a signal processing method and a power amplification device, and solves the problem of low efficiency when an existing radio frequency power amplifier is working under an average power. The power amplification device comprises an extraction module, a segmentation module, a control module and a number M of parallel power amplification branches; the extraction module is used for extracting a signal envelope of an input signal; the segmentation module is used for segmenting the signal envelope according to an peak-to-average power ratio of the input signal and at least one of parameters of partial or all power amplification branches and obtaining at least one segment of a sub-signal envelope, and the parameters include the maximum peak-to-average power ratio of signals that the power amplification branches are capable of processing; and the control module is used for amplifying, in a corresponding time range respectively, the power of a sub-signal corresponding to each segment of the sub-signal envelope by the power amplification branch which matches the peak-to-average power ratio of the sub-signal and outputting the sub-signal to obtain an output signal.

Description

Signal processing method and power amplifying device

Technical field

The present invention relates to the field of communications, and in particular, to a signal processing method and a power amplifying device.

Background technique

With the 4th Generation mobile communication technology (4G) of wireless communication technology, the 5th Generation mobile communication technology (5G) mobile communication pre-phase The demand for R&D has increased, and the requirements for signal bandwidth for wireless communications and transmitter efficiency for communication systems are increasing. RF power amplifiers are an important component of various types of transmitters in wireless communication systems. Therefore, higher requirements are placed on the operating bandwidth, efficiency, and output power of RF power amplifiers. However, the increase in the operating bandwidth, efficiency, and output power of the RF power amplifier will constrain each other; for example, to increase the bandwidth of the RF power amplifier, it is necessary to sacrifice the power and efficiency of the RF power amplifier; Under the bandwidth, to increase the output power of the RF power amplifier, it is necessary to sacrifice the efficiency of the RF power amplifier.

In the prior art, in order to simultaneously satisfy the bandwidth and efficiency of the RF power amplifier, the bandwidth is generally extended by structurally improving a certain high-efficiency RF power amplifier. However, with the development of wireless communication technologies, in order to meet the high data rate characteristics of signals, the prior art generally increases the complexity of the modulation signal, thereby expanding the signal bandwidth and the peak-to-average power ratio. , referred to as PAPR) becomes larger. In order to meet the linearity requirement of the input signal of the peak-to-average power ratio, the existing high-frequency RF power amplifier that satisfies the bandwidth requirement cannot operate in its peak power region, but will fall back to the average power region, thereby making the high-frequency RF power amplifier The efficiency has dropped dramatically.

Therefore, how to achieve the shot when the RF power amplifier falls back to the average power region The uniformity of frequency power amplifier efficiency and bandwidth to meet the demand for RF power amplifiers in wireless communication systems in the future has become an urgent problem to be solved in the industry.

Summary of the invention

Embodiments of the present invention provide a signal processing method and a power amplifying device, which solve the problem that the existing radio frequency power amplifier operates at an average power efficiency.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In a first aspect, a power amplifying device is provided, comprising: an extracting module, a segmentation module, a control module, and M parallel power amplification branches, where M is a natural number greater than 1, wherein:

The extraction module is configured to extract a signal envelope of the input signal;

The segmentation module is configured to segment the signal envelope according to at least one of a peak-to-average power ratio of the input signal and a parameter of a part or all of the power amplification branch to obtain at least one sub-signal envelope;

The control module is configured to separately perform power amplification and output by using a power amplification branch matched with a peak-to-average power ratio of the sub-signal in a corresponding time domain range in a corresponding sub-signal corresponding to each sub-signal envelope, Get the output signal.

In a first possible implementation manner of the first aspect, the segmentation module segments the signal envelope according to a peak-to-average power ratio of the input signal, and when the at least one sub-signal envelope is obtained, specifically includes :

Segmenting the peak-to-average power ratio of the input signal to obtain N peak-to-average power ratio intervals, and segmenting the signal envelope according to the N peak-to-average power ratio intervals to obtain N segment sub-signal envelopes Each sub-signal envelope corresponds to a peak-to-average power ratio interval; wherein the N is a natural number greater than 1.

In a second possible implementation manner of the first aspect, the parameter of the part or all of the power amplification branch includes the number of branches of the part or all of the power amplification branch, and the part or all of the power amplification branch The branch performance of each power amplification branch and the maximum peak-to-average power ratio of the signals that can be processed; the branch performance of the power amplification branch includes the bandwidth of the power amplification branch.

According to the first aspect or the first or second possible implementation of the first aspect, In a third possible implementation manner of the first aspect, the control module is further configured to select N power amplification branches, and obtain each power amplification branch of the N power amplification branches The maximum peak-to-average power ratio of the processed signal;

The segmentation module segments the signal envelope according to a peak-to-average power ratio of the input signal and a parameter of a part or all of the power amplification branch, and when the N sub-signal envelopes are obtained, the method specifically includes: following the control The N maximum peak-to-average power ratios obtained by the module and the peak-to-average power ratio of the input signal segment the signal envelope to obtain N sub-signal envelopes; wherein the N is a natural number greater than 1.

According to the first aspect or the first possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, when the segmentation module is configured according to a peak-to-average power ratio of the input signal The signal envelope is segmented to obtain at least one sub-signal envelope;

The control unit control module is further configured to select N power amplification branches, and adjust each power amplification branch in the N power amplification branches according to a peak-to-average power ratio of each sub-signal envelope corresponding to the sub-signal The maximum peak-to-average power ratio of the signal that the road can handle.

In a fifth possible implementation manner of the first aspect, the control unit control module passes each sub-signal envelope corresponding to the sub-signal, and respectively passes a peak-to-average power ratio with the sub-signal in a corresponding time domain range. The matched power amplification branch performs power amplification and output, and the output signal is specifically used to include:

And each sub-signal envelope corresponds to the sub-signal, and respectively performs power amplification in a corresponding time domain range by a power amplifying branch matched with a peak-to-average power ratio of the sub-signal;

All the power amplified sub-signals are combined to obtain an output signal.

According to the first aspect, or the fifth possible implementation manner of the first aspect, in the sixth possible implementation manner of the first aspect, the control module is configured to respectively associate each sub-signal envelope with a sub-signal in a corresponding When the power amplification is performed by the power amplification branch matching the peak-to-average power ratio of the sub-signal in the time domain, the specific includes:

A sub-signal envelope corresponding to the current time domain is determined to correspond to the sub-signal, and a power amplification branch matching the peak-to-average power ratio of the sub-signal is gated.

According to the first aspect or the first to sixth possible implementations of the first aspect In a seventh possible implementation manner of the first aspect, the power amplifying device further includes:

a modulation module, configured to modulate the input signal into a radio frequency signal;

Further, the control module performs power amplification by using a power amplification branch that matches each of the sub-signal envelope corresponding sub-signals in a corresponding time domain range and matches a peak-to-average power ratio of the sub-signals, respectively.

And each of the radio frequency signals is respectively subjected to power amplification in a corresponding time domain range by a power amplification branch matched with a peak-to-average power ratio of the sub-signals corresponding to the radio frequency sub-signals.

According to the first aspect, or any one of the first to the seventh possible implementation manners of the first aspect, in an eighth possible implementation manner of the first aspect, the :

The signal envelope of the input signal is periodically extracted according to a predetermined time period; or the signal envelope of the input signal is extracted aperiodically.

In a second aspect, a signal processing method is provided, which is applied to the power amplifying device provided by the first aspect, the method comprising:

Extracting a signal envelope of the input signal;

And segmenting the signal envelope according to at least one of a peak-to-average power ratio of the input signal and a parameter of a part or all of the power amplification branch to obtain at least one sub-signal envelope;

Each sub-signal envelope corresponds to a sub-signal, and is respectively amplified and outputted by a power amplifying branch matched with a peak-to-average power ratio of the sub-signal in a corresponding time domain range to obtain an output signal.

In a first possible implementation manner of the second aspect, the segmenting the signal envelope according to a peak-to-average power ratio of the input signal, to obtain at least one sub-signal envelope, specifically includes:

Segmenting the peak-to-average power ratio of the input signal to obtain N peak-to-average power ratio intervals, and segmenting the signal envelope according to the N peak-to-average power ratio intervals to obtain N segment sub-signal envelopes Each sub-signal envelope corresponds to a peak-to-average power ratio interval; Wherein, the N is a natural number greater than 1.

In a second possible implementation manner of the second aspect, the parameter of the part or all of the power amplification branch includes the number of branches of the part or all of the power amplification branch, and the part or all of the power amplification branch The branch performance of each power amplification branch and the maximum peak-to-average power ratio of the signals that can be processed; the branch performance of the power amplification branch includes the bandwidth of the power amplification branch.

According to the second aspect or the first or second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the signal enveloping according to a parameter of the power amplification branch Before performing segmentation to obtain at least one sub-signal envelope, the method further includes:

Selecting N power amplification branches and obtaining a maximum peak-to-average power ratio of signals that can be processed by each of the N power amplification branches;

Decoding the signal envelope according to the parameter of the power amplification branch, and obtaining at least one sub-signal envelope specifically includes: comparing the N maximum peak-to-average power ratios and the peak-to-average power ratio of the input signal The signal envelope is segmented to obtain N sub-signal envelopes; wherein N is a natural number greater than one.

According to the second aspect or the first possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the performing the signal envelope according to a peak-to-average power ratio of the input signal After segmentation, after obtaining at least one sub-signal envelope, the method further includes:

Selecting N power amplification branches, and adjusting a maximum peak value of a signal that can be processed by each power amplification branch in the N power amplification branches according to a peak-to-average power ratio of each sub-signal envelope corresponding to the sub-signal Power ratio.

In a fifth possible implementation manner of the second aspect, the sub-signal envelope corresponding sub-signals are respectively amplified by a power matching the peak-to-average power ratio of the sub-signals in a corresponding time domain range. The branch is subjected to power amplification and output, and the output signal specifically includes:

Each sub-signal envelope is corresponding to the sub-signal, and respectively, the power amplifier is respectively performed by a power amplification branch matching the peak-to-average power ratio of the sub-signals in a corresponding time domain range. Big;

All the power amplified sub-signals are combined to obtain an output signal.

According to the second aspect, or the fifth possible implementation manner of the second aspect, in the sixth possible implementation manner of the second aspect, the sub-signal envelopes each sub-signal corresponding to the corresponding time domain The power amplification by the power amplification branch matched with the peak-to-average power ratio of the sub-signal includes:

According to the second aspect, or any one of the first to the sixth possible implementation manners of the second aspect, in the seventh possible implementation manner of the second aspect, the sub-signal packet The network corresponding sub-signals are respectively amplified and outputted by a power amplifying branch matching the peak-to-average power ratio of the sub-signals in a corresponding time domain range, and the output signal is obtained, and the method further includes:

Modulating the input baseband signal into a radio frequency signal;

Further, the sub-signal envelope corresponding sub-signals are respectively subjected to power amplification in a corresponding time domain range by a power amplification branch matching the time domain range and the peak-to-average power ratio of the sub-signals, specifically including :

According to the second aspect, or any one of the first to the seventh possible implementation manners of the second aspect, in the eighth possible implementation manner of the second aspect, the extracting the input baseband The signal envelope of the signal specifically includes:

The signal processing method and the power amplifying device provided by the embodiment of the present invention segment the signal envelope of the input signal according to at least one of a peak-to-average power ratio of the input signal and a parameter of part or all of the power amplification branch to obtain at least a sub-signal envelope, and then each sub-signal envelope corresponding to the sub-signal, respectively passed in the corresponding time domain range The power amplification branch matched with the peak-to-average power ratio of the sub-signal is subjected to power amplification and output to obtain an output signal. In this way, each sub-signal is power amplified by a power amplifying branch that matches the peak-to-average power ratio of the sub-signal, so that each power amplifying branch can perform power amplification in its peak power region without falling back to The average power area increases the power amplifier efficiency of each power amplification branch, thereby improving the power amplifier efficiency of the entire power amplifying device.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a drawing of some embodiments of the invention.

1 is a schematic structural diagram of a power amplifying device according to an embodiment of the present invention;

2 is a schematic diagram of a signal envelope segmentation according to an embodiment of the present invention;

3 is a schematic structural diagram of another power amplifying device according to an embodiment of the present invention;

4 is a schematic diagram of selection of a power amplification branch according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of another power amplification branch selection according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic diagram showing the comparison between the efficiency of the existing ideal class B radio frequency power amplifier and the power amplifier efficiency between the class B radio frequency power amplifiers provided by the present invention;

FIG. 7 is a schematic flowchart diagram of a signal processing method according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of an overall solution according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic diagram of an envelope amplitude partition according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Some embodiments, but not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Embodiments of the present invention provide a power amplifying apparatus. In this embodiment, the power amplifying apparatus is configured to divide an input signal of a peak-to-average power ratio into a plurality of sub-signals having a low peak-to-average power ratio, and each sub-signal passes Different power amplification branches in the power amplifying device perform power amplification, thereby improving the efficiency of the power amplifying device, and optimizing the efficiency and bandwidth of the power amplifying device. As shown in FIG. 1, the power amplifying device comprises: an extracting module 11, a segmentation module 12, a control module 13 and M parallel power amplification branches 14, wherein:

The extraction module 11 is configured to extract a signal envelope of the input baseband signal.

The above input signals include, but are not limited to: second generation mobile communication technology (English: second generation, 2G for short) global mobile communication system (English: global system for mobile communications, GSM for short), third generation mobile communication technology (English: 3rd-generation, referred to as 3G) Code Division Multiple Access (English: Code Division Multiple Access, CDMA2000 for short), Time Division-Synchronous Code Division Multiple Access (English: Time Division-Synchronous Code Division Multiple Access, TD-SCDMA for short) ) and Wideband Code Division Multiple Access (W-CDMA), the long-term evolution of the 4th Generation mobile communication technology (English: Long Term Evolution) , referred to as LTE) signal, and the future fifth-generation mobile communication (English: the 5th Generation mobile communication technology, referred to as 5G) signal. The above envelope signal refers to a signal envelope obtained by connecting the peak points of the input signal, and the signal envelope is a curve for reflecting the amplitude variation of the input signal.

Illustratively, when the above input signal is a baseband signal, since the baseband signal is observed from the time domain as a sine wave whose amplitude is constantly changing, the amplitude is not constant, the peak value of the signal amplitude in one cycle and the peak value of the signal amplitude in other periods. It is different, so that the average power and peak power of each cycle are different. Therefore, the power amplification The extraction module 11 of the device may segment the signal envelope of the input signal within the length of time according to a certain period of time length, wherein the period length may be changed or unchanged. Specifically, the extraction module 11 is specifically configured to: periodically extract a signal envelope of the input signal according to a predetermined time period; or extract a signal envelope of the input signal aperiodically.

The segmentation module 12 is configured to segment the signal envelope according to at least one of a peak-to-average power ratio of the input signal and a parameter of part or all of the power amplification branch 14 to obtain at least one sub-signal envelope.

Illustratively, the parameters of some or all of the above power amplification branches include: the number of branches of the part or all of the power amplification branches, and each of the power amplification branches of the part or all of the power amplification branches The maximum peak-to-average power ratio of the signal that can be processed, the branch performance of each of the power amplification branches in the power amplification branch, wherein the branch performance of the power amplification branch includes the power The bandwidth occupied by the amplifying branch 14, the signal amplification efficiency, the hardware cost, and the like. Specifically, since the existing power amplifier performs power amplification on the input signal, the input signal of the higher peak-to-average power ratio greatly affects the overall efficiency of the power amplifier. Therefore, the power amplifying device in this embodiment segments the input signal of the peak-to-average power ratio to obtain a sub-signal with a lower peak-to-average power ratio, thereby improving the efficiency of the power amplifier at a high back-off amount.

Exemplarily, when the segmentation module segments the input signal, the segmentation method can be segmented according to the following two implementation manners. Of course, the segmentation method described below is only an example, and other segments capable of implementing the envelope signal can be realized. The method belongs to the protection scope of the present invention. For example, the input signal is segmented according to the amplitude of the signal envelope; it can also be segmented according to a fixed time length, and only the selected fixed time length is suitable, and the peak-to-average power ratio can also be reduced.

Specifically, the first implementation:

The segmentation module 12 segments the signal envelope according to the peak-to-average power ratio of the input signal, and obtains at least one sub-signal envelope, which specifically includes: segmenting the peak-to-average power ratio of the input signal to obtain N peak-to-average powers. In the ratio interval, the signal envelope is segmented according to the N peak-to-average power ratio intervals, and N segment sub-signal envelopes are obtained, and each sub-signal envelope corresponds to a peak-to-average power ratio interval; wherein the above N is a natural number greater than 1. .

The second way to achieve:

When the segmentation module 12 segments the signal envelope according to the peak-to-average power ratio of the input signal and the parameters of part or all of the power amplification branch 14, to obtain N sub-signal envelopes, the control module 13 is configured to: select N The strip power amplifies the branch 14 and obtains the maximum peak-to-average power ratio of the signals that can be processed by each of the power amplifying branches 14 of the N power amplifying branches 14. Based on the N maximum peak-to-average power ratios obtained by the control module 13 and the peak-to-average power ratio of the input signal, the segmentation module segments the signal envelope to obtain N sub-signal envelopes, so that each sub-signal envelope corresponds to one power. The maximum peak-to-average power ratio of the amplification branch 14; wherein the above N is a natural number greater than one.

It should be noted that since the peak-to-average power ratio of the signal is a value that measures the degree of envelope fluctuation of the air interface signal, the peak-to-average power ratio of the input signal is directly divided to implement a signal envelope of the input baseband signal. Segmentation is the most convenient segmentation method.

In addition, since the segmentation module 12 segments the input signal according to the first implementation manner, the peak-to-average power ratio of the input signal is segmented according to a predetermined segmentation strategy, according to the peak-to-average power ratio after segmentation. The input signal is segmented such that the degree of matching between the parameters of the power amplification branch 14 and the segmented sub-signals in the power amplifying device is not high. Therefore, when the segmentation module 12 segments the signal envelope according to the peak-to-average power ratio of the input signal to obtain at least one sub-signal envelope, the control module 13 is further configured to select the N power amplification branches 14 and The maximum peak-to-average power ratio of the signals that can be processed by each of the power amplification branches 14 in the N power amplification branches 14 is adjusted according to the peak-to-average power ratio of the sub-signal envelopes corresponding to the sub-signal envelopes.

Exemplarily, when the maximum peak-to-average power ratio of the signal that can be processed by the selected power amplification branch 14 is set, the control module 13 may be set by the control circuit or may be set by software. For example, if the amplifier is included in the power amplification branch 14, the peaks of the amplified signals of the power amplification branch 14 can be changed by changing the drain or gate voltage of the amplifier in the power amplification branch 14. The maximum threshold for the power ratio. For example, by lowering the drain voltage of the amplifier in the selected power amplification branch 14, the power tube of the amplifier can be operated in a high efficiency region (ie, A signal that handles the peak-to-average power ratio).

Exemplarily, as shown in FIG. 2, if the peak-to-average power ratio of the input signal is 9 db, the signal envelope of the input signal may be segmented according to a predetermined allocation strategy, for example, if the allocation strategy is The peak-to-average power ratio of the input signal is averaged, and the peak-to-average power ratio interval of each sub-signal envelope after segmentation is 0-3db, 3-6db, 6-9db, respectively, due to the envelope of the 3-segment sub-signal The peak value of the peak-to-average power ratio is 3db, and both are smaller than the peak-to-average power ratio before segmentation. The segment value is 9db. Therefore, the sub-signal corresponding to the sub-signal envelope has a lower peak-to-average power ratio, thus processing The power amplification branch 14 of the sub-signal corresponding to the sub-signal envelope has less 6 dB back-off than the current specific power amplifier, and the power amplifier efficiency can be improved by about 20%.

The control module 13 is configured to separately perform power amplification and output through the power amplification branch 14 matching the peak-to-average power ratio of the sub-signals in the corresponding time domain range, respectively, to obtain an output. signal.

Wherein, the corresponding time domain range refers to a time domain range corresponding to the sub-signal envelope of each segment, for example, when a certain power amplification branch is controlled according to a sub-signal envelope of a segment When the amplification is performed, the power amplification branch amplifies the sub-signals corresponding to the sub-signal envelope of the segment.

Exemplarily, the control module 13 specifically includes, when the sub-signals corresponding to each sub-signal envelope are respectively subjected to power amplification by the power amplification branch 14 matching the peak-to-average power ratio of the sub-signals in the corresponding time domain range. The sub-signal envelope corresponding to the current time domain is determined to correspond to the sub-signal, and the power amplification branch 14 matching the peak-to-average power ratio of the sub-signal is gated, and the other power amplification branches 14 are turned off. That is, the control module 13 sequentially strobes the different power amplification branches 14 according to the time domain range of each sub-signal of the input signal corresponding to the time domain to power-amplify each sub-signal envelope corresponding sub-signal, wherein each selection The pass power amplification branch 14 amplifies the sub-signals that match the maximum peak-to-average power ratio of the signals that can be processed.

In addition, the control module 13 performs power amplification on each of the sub-signals corresponding to each sub-signal envelope by the power amplification branch 14 matching the peak-to-average power ratio of the sub-signals in the corresponding time domain. After the power of the output of the amplification branch 14 is amplified, The sub-signals are not directly output and need to be combined into a complete output signal for output. At this point, all the power-amplified sub-signals can be directly combined to obtain a complete output information.

Exemplarily, the control module can use the following two implementation manners to respectively transmit the sub-signals corresponding to each sub-signal envelope through the power amplification branch 14 that matches the peak-to-average power ratio of the sub-signals in the corresponding time domain range. Perform power amplification. Specifically, the following is a specific implementation process of the three implementation manners.

The first implementation (each power amplification branch 14 processes only a sub-signal corresponding to a sub-signal envelope):

As shown in FIG. 3, the power amplifying device 1 further includes a shunting module 15, and the shunting multiple of the shunting module 15 is Y, and the shunt multiple Y is greater than or equal to the number M of the selected power amplifying branch 14.

Specifically, the shunt module 15 is configured to split the input signal to obtain a Y input signal; the control module 13 is configured to input any M input signals of the Y input signals to the M-channel power amplification branch respectively. In step 14, the power amplification branch 14 matching the peak-to-average power ratio of the sub-signal is respectively gated in the time domain of each sub-signal envelope corresponding to the sub-signal.

As shown in FIG. 4, if Y=3 and M=4, the number of input signals obtained after the shunt is less than the number 4 of the selected power amplification branch, and the control module selects the branch 1, the branch 2, and the branch. The road 3 inputs the input signals for the working branches respectively, and the corresponding branch 4 belongs to the redundant circuit, and no signal passes. At this time, in the implementation manner, the number of sub-signal envelopes N after segmentation needs to be equal to or smaller than the shunt multiple Y, so that the sub-signals corresponding to the sub-signal envelope after segmentation can be completely processed, otherwise the partial sub-signals will be caused. The sub-signal corresponding to the signal envelope is lost. Alternatively, as shown in FIG. 5, if Y=4 and M=3, since the branching multiple 4 is larger than the number of selected power amplification branches 3, all three branches need to be selected as the working branch, and there is a The pilot signal is not input to the power amplification branch. At this time, in the implementation manner, the number of sub-signal envelopes N after segmentation needs to be less than or equal to the number M of power amplification branches, so that the sub-signals corresponding to the sub-signal envelopes after segmentation can be completely processed, otherwise The sub-signals corresponding to the partial sub-signal envelope are lost.

The second implementation mode (each power amplification branch can process the sub-signals corresponding to the multi-segment sub-signal envelope)

As shown in FIG. 3, the power amplifying device 1 further includes a shunting module 14, and the shunting multiple of the shunting module is Y, and the shunt multiple Y is smaller than the number M of the selected power amplifying branch.

Specifically, the shunt module is configured to split the input signal to obtain a Y input signal; the control module is configured to determine the power amplification branch 14 matched by the sub-signal corresponding to each sub-signal envelope, and then in each segment Within the time domain of the signal envelope corresponding to the sub-signal, the unpowered power amplification branch 14 is selected from the matched power amplification branch 14 for power amplification. Exemplarily, if the input signal is composed of the sub-signal 1, the sub-signal 2, and the sub-signal 3 in the time domain order, the branching multiple is 2, and the selected power amplification branch is the branch 1 and the branch 2, the control is performed. a module, determining that the power amplification branch matching the peak-to-average power ratio of the sub-signal 1 is the branch 1 and the branch 2, and the power amplification branch matching the peak-to-average power ratio of the sub-signal 1 is the branch 2 The power amplification branch matching the peak-to-average power ratio of the sub-signal 3 is the

branches

1, 2. The control module 13 simultaneously inputs the input signal 1 and the input signal 2 to the branch 1 and the branch 2, and then according to the time domain sequence of the input signal, the strobe branch 1 power-amplifies the sub-signal 1 and then strobes the branch 2 The sub-signal 2 is subjected to power amplification, and finally the strobe branch 2 is continued to power-amplify the sub-signal 3. At this time, the branch 1 outputs the sub-signal 1 after the power-amplification is amplified, and the branch 2 outputs the amplified sub-signal. Signal 2 and sub-signal 3.

As shown in FIG. 3, the power amplifying device 1 further includes: a modulation module 16, wherein:

The modulation module 16 is configured to modulate the input signal into a radio frequency signal.

In this embodiment, the modulation module 16 is configured to perform an up-conversion process on the input baseband signal to obtain a high-frequency up-conversion signal. At the same time, since the obtained up-converted signal has a small frequency and is not suitable for direct input into the power amplifier, the modulation module 16 is also required to perform signal modulation on the up-converted signal to obtain a radio frequency signal having a relatively high frequency. Wherein, the above up-conversion means that the modulation module 16 shifts the frequency spectrum of the baseband signal to the desired higher carrier frequency. It should be noted that when the modulation module 16 performs up-conversion processing on the input baseband signal through the modulator or the mixer in the modulation module 16, the adjustment The controller or mixer requires a local oscillator signal that is consistent with the carrier frequency.

The control module 13 performs power amplification by using the power amplification branch 14 matching the peak-to-average power ratio of the sub-signals in each of the sub-signal envelope corresponding sub-signals in the corresponding time domain, and specifically includes: modulating the module 16 Each of the obtained radio frequency signals is respectively subjected to power amplification in a corresponding time domain range by a power amplification branch 14 matching the peak-to-average power ratio of the sub-signals corresponding to the radio frequency sub-signals.

Illustratively, if the power amplifying device of the present invention is exemplified by a class B radio frequency power amplifier (that is, applying the power amplifying device principle provided by the present invention to an existing class B radio frequency power amplifier), refer to the present embodiment shown in FIG. A comparison of the efficiency of an ideal Class B RF power amplifier with the power amplifier efficiency of a Class B RF power amplifier provided by the present invention. The curve 1 in FIG. 6 is the efficiency curve of the ideal class B radio frequency power amplifier provided by the embodiment of the present invention, and the curve 2 is the efficiency curve of the existing ideal class B radio frequency power amplifier. Referring to the curve 1 shown in FIG. 6, the ideal class B power amplifier provided by the embodiment of the present invention performs power amplification by dividing the input signal into two parts. Specifically, when retracting to 6 db, the embodiment of the present invention The power of the ideal class B power amplifier is 78% higher than that of the existing ideal class B radio frequency power amplifier, and the ideal class B power amplifier provided by the embodiment of the present invention remains at a higher amount of backoff. It can maintain high efficiency, which ensures the efficiency of the RF power amplifier when it is retracted.

In addition, it should be noted that in the prior art, the average efficiency of the fallback interval is usually also improved by a Doherty RF power amplifier. The Doherty RF power amplifier mainly uses a load modulation structure to achieve power amplification. Load modulation This technique improves the average efficiency of the back-off interval by synthesizing at least two RF power amplifiers with different offsets to achieve multiple peak efficiency points. For Doherty RF power amplifiers, it is equivalent to active load modulation, with small load resistance at high power, and large load resistance at low power, so that the main RF power amplifier can be at two power points. A higher saturation efficiency is achieved, that is, the instantaneous power of the output signal is changed by modulating the supply voltage to obtain higher instantaneous efficiency.

But because the Doherty RF power amplifier is an active load modulation architecture, The Doherty RF power amplifier has a very narrow bandwidth and a very narrow range of use. However, the present invention is different. The power amplifier in the power amplifying branch of the power amplifying device provided by the present invention is a broadband power amplifier, and has a wide bandwidth and a wider use range.

The power amplifying device provided by the embodiment of the present invention segments the signal envelope of the input signal according to at least one of a peak-to-average power ratio of the input signal and parameters of some or all of the power amplifying branches to obtain at least one sub-signal packet. Then, each sub-signal envelope corresponds to the sub-signal, and respectively power-amplifies and outputs the power amplification branch matched with the peak-to-average power ratio of the sub-signal in the corresponding time domain to obtain an output signal. In this way, each sub-signal is power amplified by a power amplifying branch that matches the peak-to-average power ratio of the sub-signal, so that each power amplifying branch can perform power amplification in its peak power region without falling back to The average power area increases the power amplifier efficiency of each power amplification branch, thereby improving the power amplifier efficiency of the entire power amplifying device.

An embodiment of the present invention provides a signal processing method. As shown in FIG. 7, the signal processing method is applied to the power amplifying device corresponding to FIG. 1 and FIG. 3, and the power amplifying device includes M parallel power amplifying branches.

It should be noted that the descriptions of the technical terms, concepts, and the like related to the previous embodiment in this embodiment may refer to the description in the previous embodiment in FIG. 1 and will not be further described in this embodiment.

Specifically, the signal processing method specifically includes the following steps:

201. The power amplifying device extracts a signal envelope of the input signal.

In this embodiment, the power amplifying device may periodically extract the signal envelope of the input signal according to a predetermined time period; or the power amplifying device may extract the signal envelope of the input signal aperiodically.

202. The power amplifying device segments the signal envelope according to at least one of a peak-to-average power ratio of the input signal and a parameter of some or all of the power amplifying branches to obtain at least one sub-signal envelope.

Exemplarily, the parameters of some or all of the above power amplification branches include: the number of branches of the part or all of the power amplification branch, and the power amplification of the part or all The maximum peak-to-average power ratio of the signals that can be processed by each of the power amplification branches in the branch, and the branch performance of each of the power amplification branches in the part or all of the power amplification branches, wherein the power is The branch performance of the amplifying branch includes the bandwidth occupied by the power amplifying branch, signal amplification efficiency, hardware cost, and the like.

Exemplarily, in the embodiment, the input signal can be segmented by at least the following two implementation manners.

The first way to achieve:

202a. The power amplifying device segments the signal envelope according to a peak-to-average power ratio of the input signal to obtain at least one sub-signal envelope.

Optionally, step 202a specifically includes:

202a1. The power amplifying device segments the peak-to-average power ratio of the input signal to obtain N peak-to-average power ratio intervals, and segments the signal envelope according to the N peak-to-average power ratio intervals to obtain N segment sub-signal envelopes. Each sub-signal envelope corresponds to a peak-to-average power ratio interval.

As shown in FIG. 2, if the peak-to-average power ratio of the input signal is 9 db, the signal envelope of the input signal may be segmented according to a predetermined allocation strategy, for example, if the allocation strategy is for the input signal The peak-to-average power ratio is averaged, and the peak-to-average power ratio of each sub-signal envelope after segmentation is 0-3db, 3-6db, 6-9db, respectively, due to the peak-to-average power ratio of the three-segment sub-signal envelope. The segment values are all 3db, and are smaller than the peak-to-average power ratio before segmentation. The segment value is 9db. Therefore, the sub-signals corresponding to the segmented sub-signal envelope have a lower peak-to-average power ratio, so that the segment is processed. The power amplification branch of the sub-signal corresponding to the sub-signal envelope is less than 6 dB back-off compared to some specific power amplifiers, and the power amplifier efficiency can be improved by about 20%.

Optionally, after the step 202a, the method further includes the following steps;

202a2, the power amplifying device selects N power amplifying branches, and adjusts a signal that can be processed by each power amplifying branch in the N power amplifying branches according to a peak-to-average power ratio of each sub-signal envelope corresponding to the sub-signal Maximum peak-to-average power ratio.

The second way to achieve:

202b, the power amplifying device according to the peak-to-average power ratio of the input signal and part or all The parameters of the power amplification branch segment the signal envelope to obtain at least one sub-signal envelope.

Optionally, before step 202b, the method further includes the following steps:

202b1. The power amplifying device selects N power amplification branches, and obtains a maximum peak-to-average power ratio of signals that can be processed by each of the power amplification branches in the N power amplification branches.

Based on step 202b1, step 202b specifically includes:

202b2. The power amplifying device segments the signal envelope according to the N maximum peak-to-average power ratio and the peak-to-average power ratio of the input signal, and obtains N sub-signal envelopes, and each sub-signal envelope corresponds to a maximum peak-to-average power ratio; The above N is a natural number greater than 1.

203. The power amplifying device respectively performs power amplification and output by using a power amplifying branch matched with a peak-to-average power ratio of the sub-signal in a corresponding time domain range to obtain an output signal. .

Optionally, step 203 specifically includes the following steps:

203a. The power amplifying device buffers each sub-signal envelope into sub-signals, and respectively performs power amplification in a corresponding time domain range by a power amplifying branch that matches a peak-to-average power ratio of the sub-signals.

203b. The power amplifying device combines all the power amplified sub-signals to obtain an output signal.

Exemplarily, based on the power amplifying device described in step 203 or step 203a, each sub-signal envelope corresponds to a sub-signal, and the power amplification is respectively performed by a power amplifying branch matching the time domain range and the peak-to-average power ratio of the sub-signal. Specifically, the power amplifying device determines a sub-signal envelope corresponding to the sub-range corresponding to the current time domain, and strobes the power amplification branch that matches the peak-to-average power ratio of the sub-signal, and turns off other power amplification branches. road.

In addition, before step 203, the method further includes:

203c1. The power amplifying device modulates the input baseband signal into a radio frequency signal.

Based on step 203c1, step 203 specifically includes the following steps:

203c2: The power amplifying device performs power amplification on each of the radio frequency signals in a corresponding time domain range by a power amplification branch matched with a peak-to-average power ratio of the sub-signals corresponding to the radio frequency sub-signals.

The signal processing method provided by the embodiment of the present invention segments the signal envelope of the input signal according to at least one of a peak-to-average power ratio of the input signal and a parameter of part or all of the power amplification branch to obtain at least one sub-signal packet. Then, each sub-signal envelope corresponds to the sub-signal, and respectively power-amplifies and outputs the power amplification branch matched with the peak-to-average power ratio of the sub-signal in the corresponding time domain to obtain an output signal. In this way, each sub-signal is power amplified by a power amplifying branch that matches the peak-to-average power ratio of the sub-signal, so that each power amplifying branch can perform power amplification in its peak power region without falling back to The average power area increases the power amplifier efficiency of each power amplification branch, thereby improving the power amplifier efficiency of the entire power amplifying device.

Optionally, another embodiment of the present invention performs segmentation processing on the amplitude of the envelope signal according to the envelope amplitude of the baseband signal, and is used to control the broadband RF amplifier branch of each power level to achieve high broadband backoff. The purpose of efficiency.

FIG. 8 is a general scheme of an embodiment of the present invention. As shown in FIG. 8, in the system scheme, an envelope amplitude segmentation processing unit segments a signal envelope according to a specific segmentation strategy, and the decision result is used. For the corresponding branch of the strobe, the high-efficiency RF power amplifier structure can be selected to be biased in any of the Class AB or Class B RF power amplifier structures. The single-band broadband RF power amplifier has basically solved the bandwidth problem, so this structure can achieve broadband effect.

Optionally, as shown in FIG. 8, an envelope signal extracting unit is configured to extract a baseband envelope signal, and an envelope amplitude segmentation processing unit is configured to extract the extracted baseband envelope signal from the RF power amplifying unit branch. The RF power amplifying unit is configured to amplify the broadband RF signal; the strobe unit controls the branch strobe of the single-tube amplifier through the strobe unit.

Optionally, in the embodiment of the present invention, the envelope amplitude may be segmented, and the peak-to-average ratio signal is segmented in real time according to the instantaneous power level thereof, and is divided into Sub-signals with lower peak-to-average ratios, each sub-signal is amplified by a different RF power amplifier branch.

FIG. 9 is a schematic diagram of an envelope amplitude partition according to an embodiment of the present invention. As shown in FIG. 9 , each sub-signal is completely orthogonal in the time domain, and each sub-signal is amplified by a separately optimized high-efficiency RF power amplifier branch. . Each individually optimized RF power amplifier branch is a wideband RF power amplifier that achieves the best RF power amplifier efficiency for the corresponding sub-signal amplification, which is equivalent to each RF power amplifier branch. A broadband high efficiency RF power amplifier. The advantage of this is that the peak-to-average ratio range of the high-efficiency operation can be achieved by the alternate operation of the RF power amplifiers. For example, a single-ended Class B RF power amplifier can achieve 40% drain efficiency by 6dB back-off. By designing a high-efficiency RF power amplifier with three signal partitions, it is theoretically possible to achieve a 10dB back-off 50% drain efficiency. . And the single-ended RF power amplifier has a mature broadband design method, which avoids the narrow-band bottleneck of the Doherty RF power amplifier.

It will be clearly understood by those skilled in the art that for the convenience and brevity of the description, only the division of each functional module described above is exemplified. In practical applications, the above function assignment can be completed by different functional modules as needed. The internal structure of the device is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the foregoing system and module, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed power amplifying device and signal processing method may be implemented in other manners. For example, the system embodiment described above is merely illustrative. For example, the division of the module is only a logical function division. In actual implementation, there may be another division manner, for example, multiple modules or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interface, indirect coupling or communication connection of the module, and may be in electrical, mechanical or other form.

In addition, each functional module in each embodiment of the present application can be integrated in one place. In the management module, each module may exist physically separately, or two or more modules may be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto.

Claims

A power amplifying device, comprising: an extracting module, a segmentation module, a control module and M parallel power amplification branches, wherein M is a natural number greater than 1, wherein:

The extraction module is configured to extract a signal envelope of the input signal;

The segmentation module is configured to segment the signal envelope according to at least one of a peak-to-average power ratio of the input signal and a parameter of a part or all of the power amplification branch to obtain at least one sub-signal envelope;

The control module is configured to separately perform power amplification and output by using a power amplification branch matched with a peak-to-average power ratio of the sub-signal in a corresponding time domain range in a corresponding sub-signal corresponding to each sub-signal envelope, Get the output signal.
The power amplifying device according to claim 1, wherein the segmentation module segments the signal envelope according to a peak-to-average power ratio of the input signal, and obtains at least one sub-signal envelope. include:

Segmenting the peak-to-average power ratio of the input signal to obtain N peak-to-average power ratio intervals, and segmenting the signal envelope according to the N peak-to-average power ratio intervals to obtain N segment sub-signal envelopes Each sub-signal envelope corresponds to a peak-to-average power ratio interval; wherein the N is a natural number greater than 1.
The power amplifying device according to claim 1, wherein the parameter of the part or all of the power amplifying branch comprises a number of branches of the part or all of the power amplifying branch, the part or all of the power amplifying branch The branch performance of each of the power amplification branches and the maximum peak-to-average power ratio of the signals that can be processed; the branch performance of the power amplification branch includes the bandwidth of the power amplification branch.
The power amplifying device according to claim 1 or 3, wherein the control module is further configured to select N power amplification branches, and acquire each power amplification branch of the N power amplification branches The maximum peak-to-average power ratio of the signal that the road can handle;

The segmentation module segments the signal envelope according to a peak-to-average power ratio of the input signal and a parameter of a part or all of the power amplification branch, and when the N sub-signal envelopes are obtained, the method specifically includes: following the control N maximum peak-to-average power ratios obtained by the module and the The peak-to-average power ratio of the input signal segments the signal envelope to obtain N sub-signal envelopes; wherein N is a natural number greater than one.
The power amplifying device according to claim 1 or 2, wherein when the segmentation module segments the signal envelope according to a peak-to-average power ratio of the input signal, at least one sub-signal envelope is obtained. Time;

The control unit control module is further configured to select N power amplification branches, and adjust each power amplification branch in the N power amplification branches according to a peak-to-average power ratio of each sub-signal envelope corresponding to the sub-signal The maximum peak-to-average power ratio of the signal that the road can handle.
The power amplifying device according to claim 1, wherein the control unit control module passes each sub-signal envelope corresponding to the sub-signal, and respectively passes the peak-to-average power of the sub-signal in a corresponding time domain range. Compared with the matched power amplification branch, the power is amplified and outputted, and the output signal is specifically used to include:

And each sub-signal envelope corresponds to the sub-signal, and respectively performs power amplification in a corresponding time domain range by a power amplifying branch matched with a peak-to-average power ratio of the sub-signal;

All the power amplified sub-signals are combined to obtain an output signal.
The power amplifying device according to claim 1 or 6, wherein the control module passes each sub-signal envelope corresponding sub-signal to a peak-to-average power ratio of the sub-signal in a corresponding time domain range The power amplification of the matched power amplification branch specifically includes:

A sub-signal envelope corresponding to the current time domain is determined to correspond to the sub-signal, and a power amplification branch matching the peak-to-average power ratio of the sub-signal is gated.
The power amplifying device according to any one of claims 1 to 7, wherein the power amplifying device further comprises:

a modulation module, configured to modulate the input signal into a radio frequency signal;

Further, the control module performs power amplification by using a power amplification branch that matches each of the sub-signal envelope corresponding sub-signals in a corresponding time domain range and matches a peak-to-average power ratio of the sub-signals, respectively.

And each of the radio frequency signals is respectively placed in a corresponding time domain range by a power matching ratio of a peak-to-average power ratio of the sub-signals corresponding to the radio frequency sub-signals Large branch roads for power amplification.
The power amplifying device according to any one of claims 1 to 8, wherein the extraction module is specifically configured to:

The signal envelope of the input signal is periodically extracted according to a predetermined time period; or the signal envelope of the input signal is extracted aperiodically.
A signal processing method, characterized by being applied to the power amplifying device of claims 1 to 9, the method comprising:

Extracting a signal envelope of the input signal;

And segmenting the signal envelope according to at least one of a peak-to-average power ratio of the input signal and a parameter of a part or all of the power amplification branch to obtain at least one sub-signal envelope;

Each sub-signal envelope corresponds to a sub-signal, and is respectively amplified and outputted by a power amplifying branch matched with a peak-to-average power ratio of the sub-signal in a corresponding time domain range to obtain an output signal.
The method according to claim 10, wherein the segmenting the signal envelope according to a peak-to-average power ratio of the input signal to obtain at least one sub-signal envelope comprises:

Segmenting the peak-to-average power ratio of the input signal to obtain N peak-to-average power ratio intervals, and segmenting the signal envelope according to the N peak-to-average power ratio intervals to obtain N segment sub-signal envelopes Each sub-signal envelope corresponds to a peak-to-average power ratio interval; wherein the N is a natural number greater than 1.
The method according to claim 10, wherein the parameters of the part or all of the power amplifying branch comprise the number of branches of the part or all of the power amplifying branch, and each of the part or all of the power amplifying branches The branch performance of the power amplification branches and the maximum peak-to-average power ratio of the signals that can be processed; the branch performance of the power amplification branch includes the bandwidth of the power amplification branch.
The method according to claim 10 or 12, wherein the method further comprises: before segmenting the signal envelope according to a parameter of the power amplification branch to obtain at least one sub-signal envelope, the method further comprising:

Selecting N power amplification branches and obtaining a maximum peak-to-average power ratio of signals that can be processed by each of the N power amplification branches;

Decoding the signal envelope according to the parameter of the power amplification branch, and obtaining at least one sub-signal envelope specifically includes: comparing the N maximum peak-to-average power ratios and the peak-to-average power ratio of the input signal The signal envelope is segmented to obtain N sub-signal envelopes; wherein N is a natural number greater than one.
The method according to claim 10 or 11, wherein the method further comprises: segmenting the signal envelope according to a peak-to-average power ratio of the input signal, after obtaining at least one sub-signal envelope, the method further include:

Selecting N power amplification branches, and adjusting a maximum peak value of a signal that can be processed by each power amplification branch in the N power amplification branches according to a peak-to-average power ratio of each sub-signal envelope corresponding to the sub-signal Power ratio.
The method according to claim 10, wherein said each sub-signal envelope corresponds to a sub-signal, respectively, in a corresponding time domain range, by a power amplification branch matching the peak-to-average power ratio of said sub-signal The circuit performs power amplification and output, and the output signal specifically includes:

And each sub-signal envelope corresponds to the sub-signal, and respectively performs power amplification in a corresponding time domain range by a power amplifying branch matching the peak-to-average power ratio of the sub-signal;

All the power amplified sub-signals are combined to obtain an output signal.
The method according to claim 10 or 15, wherein the sub-signal envelope corresponding sub-signals respectively pass power matching the peak-to-average power ratio of the sub-signals in a corresponding time domain range. Amplifying the branch for power amplification specifically includes:

A sub-signal envelope corresponding to the current time domain is determined to correspond to the sub-signal, and a power amplification branch matching the peak-to-average power ratio of the sub-signal is gated.
The method according to any one of claims 10 to 16, wherein the sub-signal envelope corresponding sub-signals are respectively compared with the peak-to-average power ratio of the sub-signals in a corresponding time domain range. The matched power amplification branch performs power amplification and output to obtain an output signal, and the method further includes:

Modulating the input baseband signal into a radio frequency signal;

Further, the sub-signal envelope corresponding sub-signals are respectively subjected to power amplification in a corresponding time domain range by a power amplification branch matching the time domain range and the peak-to-average power ratio of the sub-signals, specifically including :

And each of the radio frequency signals is respectively subjected to power amplification in a corresponding time domain range by a power amplification branch matched with a peak-to-average power ratio of the sub-signals corresponding to the radio frequency sub-signals.
The method according to any one of claims 10 to 17, wherein the extracting the signal envelope of the input baseband signal specifically comprises:

The signal envelope of the input signal is periodically extracted according to a predetermined time period; or the signal envelope of the input signal is extracted aperiodically.