CN117938096A - Efficient self-adaptive control system and method for linear power amplifier - Google Patents
Efficient self-adaptive control system and method for linear power amplifier Download PDFInfo
- Publication number
- CN117938096A CN117938096A CN202410339635.8A CN202410339635A CN117938096A CN 117938096 A CN117938096 A CN 117938096A CN 202410339635 A CN202410339635 A CN 202410339635A CN 117938096 A CN117938096 A CN 117938096A
- Authority
- CN
- China
- Prior art keywords
- signal
- power amplifier
- adaptive
- correction
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012937 correction Methods 0.000 claims abstract description 117
- 230000003044 adaptive effect Effects 0.000 claims abstract description 96
- 230000006978 adaptation Effects 0.000 claims abstract description 29
- 238000012545 processing Methods 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 238000013508 migration Methods 0.000 claims abstract description 6
- 230000005012 migration Effects 0.000 claims abstract description 6
- 230000003321 amplification Effects 0.000 claims description 21
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 21
- 238000012360 testing method Methods 0.000 claims description 20
- 238000004088 simulation Methods 0.000 claims description 18
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000012549 training Methods 0.000 claims description 6
- 238000010801 machine learning Methods 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000013178 mathematical model Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Landscapes
- Amplifiers (AREA)
Abstract
The invention provides a high-efficiency self-adaptive control system and method for a linear power amplifier, and relates to the technical field of microwave signals. The invention adopts a secondary conversion method, selects a reference power amplifier and describes the reference power amplifier by a mathematical model, and then carries out migration adaptation on the self characteristics of the adapted power amplifier and the reference power amplifier by a self-adaptive predistorter; the adaptive predistorter matches the adaptive power amplifier to the reference power amplifier through the adaptive power amplifier correction module, and then carries out predistortion correction processing on the adaptive power amplifier through the existing mathematical model, when a new amplifier needs to carry out predistortion processing, the adaptive predistorter can be matched to the model of the reference power amplifier again by only modifying the signal difference characteristic in the adaptive power amplifier correction module, so that the adaptation of different power amplifiers can be realized without newly creating a mathematical model, and the effect of reducing the adaptation time cost is achieved.
Description
Technical Field
The invention relates to the technical field of microwave signals, in particular to a high-efficiency self-adaptive control system and method for a linear power amplifier.
Background
The linear power amplifier is one of the core components of the electronic countermeasure system, and is a core component for realizing signal detection and interference of interference and defending combat equipment. Such as a main power amplifier of the transmitter radio frequency front end, converts low power signals from communication and radar equipment into high power transmission signals that are sent to the antenna and remain in a linear relationship with the original signal.
Power compression is an important indicator of the linearity and output power of a power amplifier. When the power amplifier works in a low power state, the output power and the input power are in a linear relation, namely the gain is constant; but when the input power of the transistor reaches a saturated state, the gain starts to drop, and when the actual output power is 1dB smaller than the ideal output power under the linear condition, i.e., the power gain drops by 1dB, the point is called a 1dB gain compression point, and the output power at this time is called a 1dB compression point (P1 dB).
To achieve linearization of the power amplifier, some processing means are usually adopted to compensate the linear distortion caused by power compression; among them, the predistortion technique is a widely used radio frequency power amplifier linearization technique. The predistortion circuit adds a predistorter in the input stage to make the input signal generate a distortion first and then cancel the distortion of the amplifier, thereby compensating the amplification gain and phase variation in the whole power variation range.
The method relies on measuring the nonlinear characteristics of a linear power amplifier, and a mathematical model needs to be established to describe the nonlinear behavior of the power amplifier; however, the characteristics of the power amplifiers are different, so that mathematical model description is required for the current power amplifier when predistortion processing is performed, and a lot of time is spent for adapting to linear power amplifiers in different situations.
Therefore, it is necessary to provide an efficient adaptive control system and method for linear power amplifiers to solve the problem of inefficiency in adapting different linear power amplifiers in the prior art.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a high-efficiency adaptive control system for a linear power amplifier, configured to linearly amplify an original input signal to obtain a linear amplified signal, where the system includes: the device comprises an original signal input end, an adaptive predistorter, a signal coupler, an adaptive power amplifier and a signal output antenna;
The original signal input end is respectively and electrically connected with the input ends of the adaptive predistorter and the signal coupler, the output end of the adaptive predistorter is electrically connected with the other input end of the signal coupler, the output end of the signal coupler is electrically connected with the input end of the adaptive power amplifier, and the output end of the adaptive power amplifier is electrically connected with the signal output antenna;
The self-adaptive predistorter is used for generating a corresponding predistortion correction signal according to an original input signal, and comprises an ADC conversion module, a self-adaptive power amplifier correction module, a reference power amplifier correction module and a DAC conversion module which are electrically connected in sequence; the signal coupler is used for carrying out signal coupling on the original input signal and the predistortion correction signal to obtain a corresponding amplifier input signal; the adaptive power amplifier is used for carrying out signal amplification processing on an input signal of the amplifier to obtain a linear amplified signal; the adaptive power amplifier performs migration adaptation on the self characteristic and the reference power amplifier through the adaptive predistorter, so that an output signal of the reference power amplifier is used for predistortion of the adaptive power amplifier.
As a further solution, the adaptive power amplifier correction module is configured to store signal difference characteristics of the adaptive power amplifier, and correct the digital input signal according to the signal difference characteristics to obtain a reference correction signal; wherein the signal difference characteristic is used to describe an amplitude difference and a phase difference relationship between the adapted power amplifier and the reference power amplifier.
As a further solution, the adaptive power amplifier correction module further performs a data processing of the signal difference feature by using a difference comparison table; the difference comparison table comprises an amplitude difference comparison table and a phase difference comparison table; when the self-adaptive power amplifier correction module corrects the digital input signal, the difference value corresponding to the amplitude and the phase is extracted in a table look-up mode and is corrected.
As a further solution, the reference power amplifier correction module operates a reference predistortion correction model, and performs predistortion correction on the reference correction signal through the reference predistortion correction model to obtain a predistortion correction signal; the reference predistortion correction model is constructed by training a machine learning model or constructing a mathematical parameter model, so that the reference power amplifier can carry out predistortion correction through the reference predistortion correction model and output a linear amplification signal.
As a further solution, the power amplifier to be adapted is updated and an adapted power amplifier is obtained by a power amplification adaptation system, which comprises a signal generator, a simulation simulator, a synchronization signal, a signal comparator and a signal analyzer;
The signal generator is respectively and electrically connected with the input ends of the signal coupler and the self-adaptive predistorter, the output end of the self-adaptive predistorter is electrically connected with the other input end of the signal coupler, the output end of the signal coupler is respectively and electrically connected with the input ends of the power amplifier to be adapted and the simulation simulator, the output ends of the power amplifier to be adapted and the simulation simulator are respectively connected with the two input ends of the signal comparator after being subjected to signal synchronization through the synchronous signal device, the output end of the signal comparator is electrically connected with the signal analyzer, and the signal analyzer extracts signal difference characteristics and updates the signal difference characteristics in the self-adaptive power amplifier.
The high-efficiency self-adaptive control method for the linear power amplifier is applied to the high-efficiency self-adaptive control system for the linear power amplifier, and the original input signal is subjected to linear amplification to obtain a linear amplified signal by the following steps:
Step 1: the method comprises the steps of executing when starting for the first time, selecting a reference power amplifier, updating and adapting, training the reference power amplifier to obtain a corresponding reference predistortion correction model, implanting the reference predistortion correction model into a reference power amplifier correction module, and implanting signal difference characteristics into an adaptive power amplifier correction module;
Step 2: executing at the subsequent starting, and detecting whether the current power amplifier is an adaptive power amplifier or not; if yes, the next step is carried out, otherwise, the updating adaptation step is carried out;
step 3: the self-adaptive predistorter receives an original input signal, converts the original input signal into a digital input signal through the ADC conversion module and inputs the digital input signal to the self-adaptive power amplifier correction module;
step 4: the self-adaptive power amplifier correction module corrects the digital input signal through the signal difference characteristic of the adaptive power amplifier to obtain a reference correction signal;
Step 5: the reference power amplifier correction module performs predistortion correction on the reference correction signal through a reference predistortion correction model to obtain a predistortion correction signal;
Step 6: performing digital-to-analog conversion on the predistortion correction signal through a DAC conversion module;
step 7: the self-adaptive predistorter receives and couples the original input signal and the predistortion correction signal to obtain a corresponding amplifier input signal;
step 8: the adaptive power amplifier is used for carrying out signal amplification processing on an input signal of the amplifier to obtain a linear amplified signal and transmitting the linear amplified signal to the signal output antenna.
As a still further solution, step 2 detects whether the current power amplifier is an adapted power amplifier by the following specific steps:
Step A1: setting a standard input signal and a standard output signal, and generating the standard input signal through a signal generator;
step A2: the adaptive predistorter receives a standard input signal and generates a corresponding predistortion correction signal;
step A3: the signal coupler receives and carries out signal coupling on the standard input signal and the predistortion correction signal to obtain a corresponding amplifier input signal;
step A4: the current power amplifier to be detected receives an input signal of the amplifier and performs signal amplification processing to obtain an actual output signal;
Step A5: judging whether the standard output signal is matched with the actual output signal;
If yes, updating adaptation is not needed, and the current power amplifier to be detected is set as an adapted power amplifier;
If not, updating and adapting are needed, and the current power amplifier to be detected is set as the power amplifier to be adapted.
As a still further solution, step 2 performs the update adaptation by the following specific steps:
step B1: deploying a power amplification adaptive system, and simulating a reference power amplifier through a simulation simulator;
step B2: the signal generator generates a test signal and inputs the test signal into the signal coupler and the adaptive predistorter respectively;
step B3: the self-adaptive predistorter corrects the test signal through the current signal difference characteristic to obtain a corresponding predistortion correction signal;
Step B4: the signal coupler receives and carries out signal coupling on the test signal and the predistortion correction signal to obtain a corresponding amplifier input signal and respectively inputs the corresponding amplifier input signal into the simulation simulator and the power amplifier to be adapted;
step B5: the power amplifier to be adapted generates a first output signal, the simulator generates a second output signal through simulation and performs synchronization processing through the synchronization signal generator;
step B6: continuously adjusting the test signal until the first output signal reaches the target signal, and performing step B7;
step B7: comparing the target signal with the second output signal through the signal comparator, and outputting a corresponding difference signal;
step B8: extracting signal difference characteristics in the difference signals through a signal analyzer, and returning to update the signal difference characteristics in the adaptive predistorter;
Step B9: repeating the steps B1 to B8 until the test adaptation of all target signals is completed.
Compared with the related art, the high-efficiency self-adaptive control system and method for the linear power amplifier provided by the invention have the following beneficial effects:
The invention adopts a secondary conversion method, selects a reference power amplifier and describes the reference power amplifier by a mathematical model, and then carries out migration adaptation on the self characteristics of the adapted power amplifier and the reference power amplifier by a self-adaptive predistorter; the adaptive predistorter matches the adaptive power amplifier to the reference power amplifier through the adaptive power amplifier correction module, and then carries out predistortion correction processing on the adaptive power amplifier through the existing mathematical model, when a new amplifier needs to carry out predistortion processing, the adaptive predistorter can be matched to the model of the reference power amplifier again by only modifying the signal difference characteristic in the adaptive power amplifier correction module, so that the adaptation of different power amplifiers can be realized without newly creating a mathematical model, and the effect of reducing the adaptation time cost is achieved.
Drawings
Fig. 1 is a schematic diagram of a high-efficiency adaptive control system for a linear power amplifier according to the present invention;
fig. 2 is a schematic diagram of a high-efficiency adaptive control method for a linear power amplifier according to the present invention;
FIG. 3 is a schematic diagram of the adaptation detection provided by the present invention;
Fig. 4 is a schematic diagram of update adaptation provided in the present invention.
Detailed Description
The invention will be further described with reference to the drawings and embodiments.
As shown in fig. 1, a high-efficiency adaptive control system for a linear power amplifier, configured to linearly amplify an original input signal to obtain a linearly amplified signal, the system includes: the device comprises an original signal input end, an adaptive predistorter, a signal coupler, an adaptive power amplifier and a signal output antenna;
The original signal input end is respectively and electrically connected with the input ends of the adaptive predistorter and the signal coupler, the output end of the adaptive predistorter is electrically connected with the other input end of the signal coupler, the output end of the signal coupler is electrically connected with the input end of the adaptive power amplifier, and the output end of the adaptive power amplifier is electrically connected with the signal output antenna;
The self-adaptive predistorter is used for generating a corresponding predistortion correction signal according to an original input signal, and comprises an ADC conversion module, a self-adaptive power amplifier correction module, a reference power amplifier correction module and a DAC conversion module which are electrically connected in sequence; the signal coupler is used for carrying out signal coupling on the original input signal and the predistortion correction signal to obtain a corresponding amplifier input signal; the adaptive power amplifier is used for carrying out signal amplification processing on an input signal of the amplifier to obtain a linear amplified signal; the adaptive power amplifier performs migration adaptation on the self characteristic and the reference power amplifier through the adaptive predistorter, so that an output signal of the reference power amplifier is used for predistortion of the adaptive power amplifier.
As a further solution, the adaptive power amplifier correction module is configured to store signal difference characteristics of the adaptive power amplifier, and correct the digital input signal according to the signal difference characteristics to obtain a reference correction signal; wherein the signal difference characteristic is used to describe an amplitude difference and a phase difference relationship between the adapted power amplifier and the reference power amplifier.
It should be noted that: the traditional predistortion method needs to describe a mathematical model of nonlinear characteristics of an amplifier, and then counteracts the nonlinear characteristics through a predistorter so as to obtain corresponding linear amplified signals; however, this method needs to adapt to different power amplifiers, which can take a lot of manpower and material resources. Therefore, the embodiment adopts a secondary conversion method, selects a reference power amplifier and describes the reference power amplifier by a mathematical model, and then carries out migration adaptation on the self characteristics of the adapted power amplifier and the reference power amplifier by an adaptive predistorter; the adaptive predistorter matches the adaptive power amplifier to the reference power amplifier through the adaptive power amplifier correction module, and then carries out predistortion correction processing on the adaptive power amplifier through the existing mathematical model, when a new amplifier needs to carry out predistortion processing, the adaptive predistorter can be matched to the model of the reference power amplifier again by only modifying the signal difference characteristic in the adaptive power amplifier correction module, so that the adaptation of different power amplifiers can be realized without newly creating a mathematical model, and the effect of reducing the adaptation time cost is achieved.
As a further solution, the adaptive power amplifier correction module further performs a data processing of the signal difference feature by using a difference comparison table; the difference comparison table comprises an amplitude difference comparison table and a phase difference comparison table; when the self-adaptive power amplifier correction module corrects the digital input signal, the difference value corresponding to the amplitude and the phase is extracted in a table look-up mode and is corrected.
It should be noted that: the difference comparison table is used for carrying out formatted data processing on the signal difference characteristics, so that the rapid processing and matching of the signal data can be realized, the calculated amount during linear processing is reduced, the system load is lightened, and the correction and the update are convenient (only the data in the table need to be modified).
As a further solution, the reference power amplifier correction module operates a reference predistortion correction model, and performs predistortion correction on the reference correction signal through the reference predistortion correction model to obtain a predistortion correction signal; the reference predistortion correction model is constructed by training a machine learning model or constructing a mathematical parameter model, so that the reference power amplifier can carry out predistortion correction through the reference predistortion correction model and output a linear amplification signal.
It should be noted that: the method mainly uses a machine learning model with powerful functions at present, so that a more accurate predistortion correction effect is realized.
As shown in fig. 4, as a further solution, the power amplifier to be adapted is updated and an adapted power amplifier is obtained by a power amplification adaptation system comprising a signal generator, a simulation simulator, a synchronization signal, a signal comparator and a signal analyzer;
The signal generator is respectively and electrically connected with the input ends of the signal coupler and the self-adaptive predistorter, the output end of the self-adaptive predistorter is electrically connected with the other input end of the signal coupler, the output end of the signal coupler is respectively and electrically connected with the input ends of the power amplifier to be adapted and the simulation simulator, the output ends of the power amplifier to be adapted and the simulation simulator are respectively connected with the two input ends of the signal comparator after being subjected to signal synchronization through the synchronous signal device, the output end of the signal comparator is electrically connected with the signal analyzer, and the signal analyzer extracts signal difference characteristics and updates the signal difference characteristics in the self-adaptive power amplifier.
It should be noted that: the embodiment mainly provides a hardware basis for modifying, correcting and adapting the signal difference characteristics in the adaptive power amplifier correction module, and particularly needs to combine the following steps.
As shown in fig. 2, a method for high-efficiency adaptive control of a linear power amplifier is applied to a high-efficiency adaptive control system for a linear power amplifier, which is described in any one of the above, and the method is used for performing linear amplification on an original input signal to obtain a linear amplified signal, by:
Step 1: the method comprises the steps of executing when starting for the first time, selecting a reference power amplifier, updating and adapting, training the reference power amplifier to obtain a corresponding reference predistortion correction model, implanting the reference predistortion correction model into a reference power amplifier correction module, and implanting signal difference characteristics into an adaptive power amplifier correction module;
Step 2: executing at the subsequent starting, and detecting whether the current power amplifier is an adaptive power amplifier or not; if yes, the next step is carried out, otherwise, the updating adaptation step is carried out;
step 3: the self-adaptive predistorter receives an original input signal, converts the original input signal into a digital input signal through the ADC conversion module and inputs the digital input signal to the self-adaptive power amplifier correction module;
step 4: the self-adaptive power amplifier correction module corrects the digital input signal through the signal difference characteristic of the adaptive power amplifier to obtain a reference correction signal;
Step 5: the reference power amplifier correction module performs predistortion correction on the reference correction signal through a reference predistortion correction model to obtain a predistortion correction signal;
Step 6: performing digital-to-analog conversion on the predistortion correction signal through a DAC conversion module;
step 7: the self-adaptive predistorter receives and couples the original input signal and the predistortion correction signal to obtain a corresponding amplifier input signal;
step 8: the adaptive power amplifier is used for carrying out signal amplification processing on an input signal of the amplifier to obtain a linear amplified signal and transmitting the linear amplified signal to the signal output antenna.
As a still further solution, step 2 detects whether the current power amplifier is an adapted power amplifier by the following specific steps:
Step A1: setting a standard input signal and a standard output signal, and generating the standard input signal through a signal generator;
step A2: the adaptive predistorter receives a standard input signal and generates a corresponding predistortion correction signal;
step A3: the signal coupler receives and carries out signal coupling on the standard input signal and the predistortion correction signal to obtain a corresponding amplifier input signal;
step A4: the current power amplifier to be detected receives an input signal of the amplifier and performs signal amplification processing to obtain an actual output signal;
Step A5: judging whether the standard output signal is matched with the actual output signal;
If yes, updating adaptation is not needed, and the current power amplifier to be detected is set as an adapted power amplifier;
If not, updating and adapting are needed, and the current power amplifier to be detected is set as the power amplifier to be adapted.
It should be noted that: as shown in fig. 3, this step mainly finds and detects whether the current power amplifier completes matching in time, and when the characteristic change occurs due to the influence of aging, interference and the like, we need to find and update the characteristic change in time, so as to ensure the effectiveness of predistortion processing.
As a still further solution, step 2 performs the update adaptation by the following specific steps:
step B1: deploying a power amplification adaptive system, and simulating a reference power amplifier through a simulation simulator;
step B2: the signal generator generates a test signal and inputs the test signal into the signal coupler and the adaptive predistorter respectively;
step B3: the self-adaptive predistorter corrects the test signal through the current signal difference characteristic to obtain a corresponding predistortion correction signal;
Step B4: the signal coupler receives and carries out signal coupling on the test signal and the predistortion correction signal to obtain a corresponding amplifier input signal and respectively inputs the corresponding amplifier input signal into the simulation simulator and the power amplifier to be adapted;
step B5: the power amplifier to be adapted generates a first output signal, the simulator generates a second output signal through simulation and performs synchronization processing through the synchronization signal generator;
step B6: continuously adjusting the test signal until the first output signal reaches the target signal, and performing step B7;
step B7: comparing the target signal with the second output signal through the signal comparator, and outputting a corresponding difference signal;
step B8: extracting signal difference characteristics in the difference signals through a signal analyzer, and returning to update the signal difference characteristics in the adaptive predistorter;
Step B9: repeating the steps B1 to B8 until the test adaptation of all target signals is completed.
It should be noted that: as shown in fig. 4, in this embodiment, by setting a target signal and adjusting a test signal to fix the input and output of a power amplifier to be adapted currently, and fixing the input condition (the same test signal) of a reference power amplifier, the amplitude difference comparison table and the phase difference comparison table of the adapter are updated continuously, so that the power amplifier to be adapted and the reference power amplifier can obtain the same output signal under the same input condition, thereby completing the signal difference feature elimination of the two.
The foregoing is only illustrative of the present invention and is not to be construed as limiting the scope of the invention, and all equivalent structures or equivalent flow modifications which may be made by the teachings of the present invention and the accompanying drawings or which may be directly or indirectly employed in other related art are within the scope of the invention.
Claims (8)
1. A high-efficiency adaptive control system for a linear power amplifier for linearly amplifying an original input signal to obtain a linearly amplified signal, the system comprising: the device comprises an original signal input end, an adaptive predistorter, a signal coupler, an adaptive power amplifier and a signal output antenna;
The original signal input end is respectively and electrically connected with the input ends of the adaptive predistorter and the signal coupler, the output end of the adaptive predistorter is electrically connected with the other input end of the signal coupler, the output end of the signal coupler is electrically connected with the input end of the adaptive power amplifier, and the output end of the adaptive power amplifier is electrically connected with the signal output antenna;
The self-adaptive predistorter is used for generating a corresponding predistortion correction signal according to an original input signal, and comprises an ADC conversion module, a self-adaptive power amplifier correction module, a reference power amplifier correction module and a DAC conversion module which are electrically connected in sequence; the signal coupler is used for carrying out signal coupling on the original input signal and the predistortion correction signal to obtain a corresponding amplifier input signal; the adaptive power amplifier is used for carrying out signal amplification processing on an input signal of the amplifier to obtain a linear amplified signal; the adaptive power amplifier performs migration adaptation on the self characteristic and the reference power amplifier through the adaptive predistorter, so that an output signal of the reference power amplifier is used for predistortion of the adaptive power amplifier.
2. The system of claim 1, wherein the adaptive power amplifier correction module is configured to store signal difference characteristics of the adaptive power amplifier, and correct the digital input signal by the signal difference characteristics to obtain a reference correction signal; wherein the signal difference characteristic is used to describe an amplitude difference and a phase difference relationship between the adapted power amplifier and the reference power amplifier.
3. The system of claim 2, wherein the adaptive power amplifier correction module further performs a data processing to format the signal difference characteristics via a difference lookup table; the difference comparison table comprises an amplitude difference comparison table and a phase difference comparison table; when the self-adaptive power amplifier correction module corrects the digital input signal, the difference value corresponding to the amplitude and the phase is extracted in a table look-up mode and is corrected.
4. The system of claim 1, wherein the reference power amplifier correction module operates a reference predistortion correction model and performs predistortion correction on the reference correction signal by the reference predistortion correction model to obtain a predistortion correction signal; the reference predistortion correction model is constructed by training a machine learning model or constructing a mathematical parameter model, so that the reference power amplifier can carry out predistortion correction through the reference predistortion correction model and output a linear amplification signal.
5. A high efficiency adaptive control system for a linear power amplifier according to claim 2, wherein the power amplifier to be adapted is updated and an adapted power amplifier is obtained by a power amplification adaptation system comprising a signal generator, a simulation simulator, a synchronization signal, a signal comparator and a signal analyzer;
The signal generator is respectively and electrically connected with the input ends of the signal coupler and the self-adaptive predistorter, the output end of the self-adaptive predistorter is electrically connected with the other input end of the signal coupler, the output end of the signal coupler is respectively and electrically connected with the input ends of the power amplifier to be adapted and the simulation simulator, the output ends of the power amplifier to be adapted and the simulation simulator are respectively connected with the two input ends of the signal comparator after being subjected to signal synchronization through the synchronous signal device, the output end of the signal comparator is electrically connected with the signal analyzer, and the signal analyzer extracts signal difference characteristics and updates the signal difference characteristics in the self-adaptive power amplifier.
6. A method for high-efficiency adaptive control of a linear power amplifier, applied to a high-efficiency adaptive control system for a linear power amplifier according to any one of claims 1 to 5, characterized in that the method comprises the following steps of linearly amplifying an original input signal to obtain a linear amplified signal:
Step 1: the method comprises the steps of executing when starting for the first time, selecting a reference power amplifier, updating and adapting, training the reference power amplifier to obtain a corresponding reference predistortion correction model, implanting the reference predistortion correction model into a reference power amplifier correction module, and implanting signal difference characteristics into an adaptive power amplifier correction module;
Step 2: executing at the subsequent starting, and detecting whether the current power amplifier is an adaptive power amplifier or not; if yes, the next step is carried out, otherwise, the updating adaptation step is carried out;
step 3: the self-adaptive predistorter receives an original input signal, converts the original input signal into a digital input signal through the ADC conversion module and inputs the digital input signal to the self-adaptive power amplifier correction module;
step 4: the self-adaptive power amplifier correction module corrects the digital input signal through the signal difference characteristic of the adaptive power amplifier to obtain a reference correction signal;
Step 5: the reference power amplifier correction module performs predistortion correction on the reference correction signal through a reference predistortion correction model to obtain a predistortion correction signal;
Step 6: performing digital-to-analog conversion on the predistortion correction signal through a DAC conversion module;
step 7: the self-adaptive predistorter receives and couples the original input signal and the predistortion correction signal to obtain a corresponding amplifier input signal;
step 8: the adaptive power amplifier is used for carrying out signal amplification processing on an input signal of the amplifier to obtain a linear amplified signal and transmitting the linear amplified signal to the signal output antenna.
7. The efficient adaptive control method for a linear power amplifier according to claim 6, wherein step 2 detects whether the current power amplifier is an adapted power amplifier by:
Step A1: setting a standard input signal and a standard output signal, and generating the standard input signal through a signal generator;
step A2: the adaptive predistorter receives a standard input signal and generates a corresponding predistortion correction signal;
step A3: the signal coupler receives and carries out signal coupling on the standard input signal and the predistortion correction signal to obtain a corresponding amplifier input signal;
step A4: the current power amplifier to be detected receives an input signal of the amplifier and performs signal amplification processing to obtain an actual output signal;
Step A5: judging whether the standard output signal is matched with the actual output signal;
If yes, updating adaptation is not needed, and the current power amplifier to be detected is set as an adapted power amplifier;
If not, updating and adapting are needed, and the current power amplifier to be detected is set as the power amplifier to be adapted.
8. The efficient adaptive control method for a linear power amplifier according to claim 6, wherein step 2 performs update adaptation by:
step B1: deploying a power amplification adaptive system, and simulating a reference power amplifier through a simulation simulator;
step B2: the signal generator generates a test signal and inputs the test signal into the signal coupler and the adaptive predistorter respectively;
step B3: the self-adaptive predistorter corrects the test signal through the current signal difference characteristic to obtain a corresponding predistortion correction signal;
Step B4: the signal coupler receives and carries out signal coupling on the test signal and the predistortion correction signal to obtain a corresponding amplifier input signal and respectively inputs the corresponding amplifier input signal into the simulation simulator and the power amplifier to be adapted;
step B5: the power amplifier to be adapted generates a first output signal, the simulator generates a second output signal through simulation and performs synchronization processing through the synchronization signal generator;
step B6: continuously adjusting the test signal until the first output signal reaches the target signal, and performing step B7;
step B7: comparing the target signal with the second output signal through the signal comparator, and outputting a corresponding difference signal;
step B8: extracting signal difference characteristics in the difference signals through a signal analyzer, and returning to update the signal difference characteristics in the adaptive predistorter;
Step B9: repeating the steps B1 to B8 until the test adaptation of all target signals is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410339635.8A CN117938096B (en) | 2024-03-25 | Efficient self-adaptive control system and method for linear power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410339635.8A CN117938096B (en) | 2024-03-25 | Efficient self-adaptive control system and method for linear power amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117938096A true CN117938096A (en) | 2024-04-26 |
| CN117938096B CN117938096B (en) | 2024-05-28 |
Family
ID=
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001267851A (en) * | 2000-03-22 | 2001-09-28 | Hitachi Kokusai Electric Inc | Distortion compensating amplifier |
| US20080174365A1 (en) * | 2002-05-01 | 2008-07-24 | Dali Systems Co. Ltd. | Power Amplifier Time-Delay Invariant Predistortion Methods and Apparatus |
| WO2010102439A1 (en) * | 2009-03-09 | 2010-09-16 | Zte Wistron Telecom Ab | A digital predistortion circuit with extended operating range and a method thereof |
| JP2012065220A (en) * | 2010-09-17 | 2012-03-29 | Hitachi Kokusai Electric Inc | Adaptive predistorter |
| CN102710220A (en) * | 2012-06-28 | 2012-10-03 | 武汉虹信通信技术有限责任公司 | Feed-forward power amplifier on basis of pre-distortion and Doherty |
| CN102751950A (en) * | 2012-06-29 | 2012-10-24 | 宁波大学 | Digital predistortion method of multirange multimode radio frequency power amplifier |
| US20160065147A1 (en) * | 2014-08-28 | 2016-03-03 | Analog Devices Global | Receivers for digital predistortion |
| CN208675192U (en) * | 2018-08-16 | 2019-03-29 | 奥维飞越通信有限公司 | A kind of wideband predistortion power amplifier apparatus |
| CN109983693A (en) * | 2016-11-17 | 2019-07-05 | 赛灵思公司 | The method and circuit of predistortion for power amplifier |
| CN209419582U (en) * | 2019-03-05 | 2019-09-20 | 成都中亚通茂科技股份有限公司 | A kind of superlinearity shortwave amplifier |
| US10727880B1 (en) * | 2019-03-07 | 2020-07-28 | Analog Devices International Unlimited Company | Crest factor reduction in cable communication systems |
| CN113809993A (en) * | 2021-11-18 | 2021-12-17 | 成都市卫莱科技有限公司 | Working signal monitoring control device, system and method for power amplifier |
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001267851A (en) * | 2000-03-22 | 2001-09-28 | Hitachi Kokusai Electric Inc | Distortion compensating amplifier |
| US20080174365A1 (en) * | 2002-05-01 | 2008-07-24 | Dali Systems Co. Ltd. | Power Amplifier Time-Delay Invariant Predistortion Methods and Apparatus |
| WO2010102439A1 (en) * | 2009-03-09 | 2010-09-16 | Zte Wistron Telecom Ab | A digital predistortion circuit with extended operating range and a method thereof |
| JP2012065220A (en) * | 2010-09-17 | 2012-03-29 | Hitachi Kokusai Electric Inc | Adaptive predistorter |
| CN102710220A (en) * | 2012-06-28 | 2012-10-03 | 武汉虹信通信技术有限责任公司 | Feed-forward power amplifier on basis of pre-distortion and Doherty |
| CN102751950A (en) * | 2012-06-29 | 2012-10-24 | 宁波大学 | Digital predistortion method of multirange multimode radio frequency power amplifier |
| US20160065147A1 (en) * | 2014-08-28 | 2016-03-03 | Analog Devices Global | Receivers for digital predistortion |
| CN109983693A (en) * | 2016-11-17 | 2019-07-05 | 赛灵思公司 | The method and circuit of predistortion for power amplifier |
| CN208675192U (en) * | 2018-08-16 | 2019-03-29 | 奥维飞越通信有限公司 | A kind of wideband predistortion power amplifier apparatus |
| CN209419582U (en) * | 2019-03-05 | 2019-09-20 | 成都中亚通茂科技股份有限公司 | A kind of superlinearity shortwave amplifier |
| US10727880B1 (en) * | 2019-03-07 | 2020-07-28 | Analog Devices International Unlimited Company | Crest factor reduction in cable communication systems |
| CN113809993A (en) * | 2021-11-18 | 2021-12-17 | 成都市卫莱科技有限公司 | Working signal monitoring control device, system and method for power amplifier |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1326321C (en) | Calibration of an adaptive signal conditioning system | |
| KR101763410B1 (en) | Digital Pre-distortion Power Amplifier and Method for Controlling Sync Digitally thereof | |
| EP2202879B1 (en) | A predistortion apparatus and predistortion method | |
| EP1797639B1 (en) | Arbitrary waveform predistortion table generation | |
| JP5742186B2 (en) | Amplifier | |
| US9397619B2 (en) | Distortion compensation apparatus and distortion compensation method | |
| KR20120026549A (en) | A high efficiency transmitter for wireless communication | |
| EP2795792B1 (en) | Adaptive predistortion for a non-linear subsystem based on a model as a concatenation of a non-linear model followed by a linear model | |
| US6531917B2 (en) | Non-linear distortion compensating apparatus | |
| US9444412B2 (en) | Distortion compensation apparatus and method therefor | |
| CN102437821A (en) | Device and method for linearization of synthetic aperture radar transmitter | |
| KR101931150B1 (en) | ICS_APD Linearization apparatus of power amplifier with improved non-linearity characteristics and control method therefor | |
| CN117938096B (en) | Efficient self-adaptive control system and method for linear power amplifier | |
| CN110971197B (en) | Digital predistortion device and method | |
| EP2752995B1 (en) | Modeling transmitter and/or transmit observation receiver frequency response and utilization thereof | |
| CN117938096A (en) | Efficient self-adaptive control system and method for linear power amplifier | |
| CN102983820A (en) | Nonlinear injection type linearization system and digital predistortion method | |
| CN1254911C (en) | Linearised radio transmitter | |
| US20100097137A1 (en) | Lookup table generation method and related device for a predistorter | |
| US8538349B2 (en) | Method and device for pre-distorting an exciter and predistortion exciter | |
| CN100508369C (en) | Pre-distortion f non-linear devices by post-detection | |
| CN115913140B (en) | Piecewise polynomial digital predistortion device and method for controlling operation precision | |
| CN113285727B (en) | Wireless signal transmitting device and processing method thereof | |
| Sanchez et al. | Memory behavioral modeling of RF power amplifiers | |
| RU2761856C1 (en) | Method for increasing the linearity of high-frequency power amplifiers and apparatus for implementation thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |