CN112787600B - Digital predistortion correction method and device with adjustable distortion suppression frequency band - Google Patents
Digital predistortion correction method and device with adjustable distortion suppression frequency band Download PDFInfo
- Publication number
- CN112787600B CN112787600B CN202011579438.1A CN202011579438A CN112787600B CN 112787600 B CN112787600 B CN 112787600B CN 202011579438 A CN202011579438 A CN 202011579438A CN 112787600 B CN112787600 B CN 112787600B
- Authority
- CN
- China
- Prior art keywords
- signal
- predistortion
- power amplifier
- digital
- distortion
- 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.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
Abstract
The invention discloses a digital predistortion correction method and a device with adjustable distortion suppression frequency band, wherein the method comprises the following steps: s1, collecting input and output signals of a power amplifier, and modeling the power amplifier to obtain a power amplifier mathematical model; s2, performing iterative processing on a signal generated by a baseband information source based on a power amplifier mathematical model, a digital filter and a delayer, calculating an error caused by signal distortion after the input signal passes through the power amplifier mathematical model during each iterative processing, then compensating the error signal into the input signal passing through the delayer after the error signal is processed by the digital filter, and obtaining a predistortion signal after K iterations; and S3, performing digital-to-analog conversion and up-conversion on the obtained predistortion signal, transmitting the predistortion signal to a power amplifier for amplification, and outputting the predistortion signal to the outside. The invention provides a digital predistortion correction method and device with adjustable distortion suppression frequency band, which can adjust the frequency band range of nonlinear distortion suppression and further effectively improve the distortion suppression effect of a power amplifier.
Description
Technical Field
The invention relates to distortion suppression of a power amplifier, in particular to a digital predistortion correction method and device with adjustable distortion suppression frequency band.
Background
The non-linearity of the power amplifier causes non-linear distortion of the output signal of the power amplifier. Assuming that the power amplifier baseband input signal is a broadband signal, the power amplifier baseband output is subtracted from the power amplifier input to obtain a baseband nonlinear distortion signal. The spectrum is schematically shown in fig. 1. It can be seen that the power amplifier input source signal is a broadband signal in a frequency band, but a nonlinear distorted signal is distributed in an expanded frequency band range, and a frequency band-f is defined 1 ～f 1 ，f 1 ～f 2 And f 2 ～f 3 Denoted as main channel band, adjacent channel band 1, and adjacent channel band 2, respectively.
Nonlinear distortion has two adverse effects: 1. the error rate of the receiver end is deteriorated, and the communication quality of the channel is reduced; 2. the distortion component leaked to the adjacent channel may interfere with communication of the adjacent channel. Interference to adjacent channels is not allowed in the communication standard, and therefore distortion component power of adjacent channels must be suppressed below the index. Such as an indication that the Adjacent Channel Power Ratio (ACPR) of the signal transmitted by the transmitter is required to be less than-45 dBc.
In order to solve the adverse effect of the nonlinear distortion and ensure the efficiency of the power amplifier, the digital predistortion technology is generally adopted in engineering to linearize the power amplifier, so as to restrain the nonlinear distortion. The traditional digital predistortion technology suppresses the whole nonlinear distortion, namely, suppresses the nonlinear distortion in the whole frequency band. The digital predistortion technology almost loses the effect under the condition that the power amplifier is under strong distortion, namely the nonlinear distortion of a main channel frequency band can not be effectively inhibited, and the nonlinear distortion of an adjacent channel can not be effectively inhibited.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a digital predistortion correction method and device with an adjustable distortion suppression frequency band, which can adjust the frequency band range of nonlinear distortion suppression, and further can effectively improve the distortion suppression effect of a power amplifier.
The purpose of the invention is realized by the following technical scheme: a digital predistortion correction method with adjustable distortion suppression frequency band comprises the following steps:
s1, collecting input and output signals of a power amplifier, and modeling the power amplifier to obtain a power amplifier mathematical model;
and S2, carrying out iterative processing on the signal generated by the baseband information source based on the power amplifier mathematical model, the digital filter and the delayer, calculating an error caused by signal distortion after the input signal passes through the power amplifier mathematical model during each iterative processing, then compensating the error signal into the input signal passing through the delayer after the error signal is processed through the digital filter, and obtaining a predistortion signal after K iterations.
The digital predistortion correction method further comprises a conversion output step S3:
and D/A conversion and up-conversion are carried out on the predistortion signal obtained in the step S2, and then the predistortion signal is transmitted to a power amplifier for amplification processing and then is output externally.
The power amplifier mathematical model in step S1 includes, but is not limited to, a GMP model, and the GMP model is expressed as:
wherein x (n) represents an input signal at time n, x (n-q) represents an input signal at time (n-q), and f (x (n)) represents an output signal of a power amplifier mathematical model; k is 1 And K 2 Is the nonlinear order; q 1 And Q 2 The memory depth; m is the cross term memory depth, K in the model 1 、K 2 、Q 1 、Q 2 And M are both preset known parameters;
collecting input and output signals of the power amplifier, and fitting out a model coefficient c kq And c kqm Completing the construction of a power amplifier mathematical model;
preferably, model coefficients c are modeled using a model fitting method (e.g., least squares method) of a typical linear system kq And c kqm And (6) fitting.
Wherein the step S2 comprises the following substeps:
s201, setting a digital signal generated by a baseband information source as u 0 ；
S202, in the first iteration process, a digital signal u from a baseband information source is obtained 0 Sending the input signal into a power amplifier mathematical model to obtain an output signal y of the PA mathematical model 1 Then calculating an error signal e 1 ：
e 1 ＝u 0 -y 1 ；
Error signal e 1 Processing the signals by a digital filter to obtain a signal e' 1 To input a signal u 0 Processing the signal u 'through a time delay device to obtain a signal u' 0 D 'signal e' 1 Compensate to Signal u' 0 To getOutput signal u to the first iteration 1 ：
u 1 ＝u′ 0 +e′ 1 ；
S203, in the process of the second iteration, the output signal u of the first iteration is processed 1 As input signal, sending the input signal to a power amplifier mathematical model to obtain output signal y of the PA mathematical model 2 Then calculating an error signal e 2 ：
e 2 ＝u 0 -y 2 ；
Error signal e 2 Processing the signals by a digital filter to obtain a signal e' 2 To input a signal u 1 Processing the signal u 'through a time delay device to obtain a signal u' 1 D is signal e' 2 Compensate to Signal u' 1 In the first iteration, an output signal u of the second iteration is obtained 2 ：
u 2 ＝u′ 1 +e′ 2 ；
S204, similarly, in the process of the kth iteration, the output signal u of the kth-1 iteration is processed k-1 Sending the input signal into a power amplifier mathematical model to obtain an output signal y of the PA mathematical model k Then calculating an error signal e k ：
e k ＝u 0 -y k ；
Will error signal e k Processing the signals by a digital filter to obtain a signal e' k To input a signal u k-1 Processing the signal u 'through a time delay device to obtain a signal u' k-1 D 'signal e' k Compensate to Signal u' k-1 To obtain the output signal u of the kth iteration k ：
u k ＝u′ k-1 +e′ k ；
Wherein K =2,3, \8230, K;
and S205, after the K iterations are completed, taking the output signal of the K iteration as the finally obtained predistortion signal.
Preferably, the digital filters used in each iteration have the same time delay and passband frequency; the digital filter is an FIR filter; the time delay device adopted in each iteration process has the same time delay with the digital filter.
The digital predistortion correction method also comprises the step of adjusting the suppression frequency band:
the passband of the error signal in the iterative process is adjusted by controlling the passband range of the digital filter, so that the distortion suppression frequency band of the predistortion signal is adjusted.
Preferably, when the passband range of the digital filter is controlled, the passband frequency of the digital filter can be directly controlled by replacing (adjusting) the filter; or a digital filter with adjustable passband frequency can be adopted to directly adjust the channel frequency of the digital filter so as to achieve the effect of adjusting the distortion suppression frequency band of the predistortion signal.
A digital predistortion correcting device with adjustable distortion suppression frequency band, comprising:
the model building unit is used for collecting input and output signals of the power amplifier and modeling the power amplifier to obtain a power amplifier mathematical model;
the predistortion processing unit is used for carrying out iterative processing on the signal generated by the baseband information source through a power amplifier mathematical model, a digital filter and a delayer to obtain a predistortion signal;
and the conversion output unit is used for performing digital-to-analog conversion and up-conversion on the obtained predistortion signal, transmitting the predistortion signal to a power amplifier for amplification, and outputting the predistortion signal to the outside.
The predistortion processing unit comprises a K-level predistortion processing module;
each stage of the predistortion processing module calculates an error caused by signal distortion after an input signal passes through a power amplifier mathematical model, and then compensates the error signal into the input signal passing through the delayer after the error signal is processed by a digital filter to obtain an output signal of the stage of the predistortion processing module;
for the 1 st-stage pre-distortion processing module, a signal generated by a baseband information source is used as an input signal, and an output signal of the signal is transmitted to the 2 nd-stage pre-distortion processing module; for the 2 nd-K-1 level predistortion processing modules, the signal output by the previous level predistortion processing module is used as an input signal, and the output signal of the previous level predistortion processing module is transmitted to the next level predistortion processing module; and for the K-stage pre-distortion processing module, the signal output by the K-1-stage pre-distortion processing module is used as an input signal, and the output signal of the K-1-stage pre-distortion processing module is used as a final pre-distortion signal and is transmitted to the conversion output unit.
The invention has the beneficial effects that: the invention can arbitrarily control the target frequency band of the nonlinear suppression of the digital predistortion by controlling the passband range of the digital filter, can realize the suppression of the nonlinear distortion of the frequency band of interest only, and the suppression of the nonlinear distortion has higher precision, thereby effectively improving the distortion suppression effect of the power amplifier and ensuring that a transmitter meets the index requirement of a communication standard.
Drawings
FIG. 1 is a schematic diagram of a frequency band range of nonlinear distortion of a power amplifier;
FIG. 2 is a flow chart of a method of the present invention;
FIG. 3 is a schematic block diagram of the system of the present invention;
fig. 4 is a schematic diagram of a predistortion processing unit in an embodiment.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 2, a digital predistortion correction method with adjustable distortion rejection frequency band includes the following steps:
s1, collecting input and output signals of a power amplifier, and modeling the power amplifier to obtain a power amplifier mathematical model;
s2, iterative processing is carried out on signals generated by the baseband information source based on a power amplifier mathematical model, a digital filter and a time delay unit, during each iterative processing, errors caused by signal distortion are calculated after the input signals pass through the power amplifier mathematical model, then the error signals are compensated into the input signals passing through the time delay unit after being processed through the digital filter, and after K times of iterations, pre-distortion signals are obtained.
The digital predistortion correction method further comprises a conversion output step S3:
and D/A conversion and up-conversion are carried out on the predistortion signal obtained in the step S2, and then the predistortion signal is transmitted to a power amplifier for amplification processing and then is output externally.
The power amplifier mathematical model in step S1 includes, but is not limited to, a GMP model, and the GMP model is expressed as:
in the formula, x (n) represents an input signal at the time of n, x (n-q) represents an input signal at the time of (n-q), and f (x (n)) represents an output signal of a power amplifier mathematical model; k 1 And K 2 Is a non-linear order; q 1 And Q 2 The memory depth; m is the cross term memory depth, K in the model 1 、K 2 、Q 1 、Q 2 And M are both preset known parameters;
collecting input and output signals of a power amplifier, and fitting out a model coefficient c kq And c kqm Completing the construction of a power amplifier mathematical model;
in the embodiments of the present application, the model coefficient c is matched using a model fitting method (e.g., least squares method) of a typical linear system kq And c kqm And (6) fitting.
Wherein the step S2 comprises the substeps of:
s201, setting a digital signal generated by a baseband information source as u 0 ；
S202, in the first iteration process, a digital signal u from a baseband signal source is obtained 0 Sending the input signal into a power amplifier mathematical model to obtain an output signal y of the PA mathematical model 1 Then calculating an error signal e 1 ：
e 1 ＝u 0 -y 1 ；
Error signal e 1 Processing the signals by a digital filter to obtain a signal e' 1 To input a signal u 0 Processing the signal u 'by a delayer to obtain a signal u' 0 D is signal e' 1 Compensate to Signal u' 0 In the step (1), the first step,obtaining an output signal u of a first iteration 1 ：
u 1 ＝u′ 0 +e′ 1 ；
S203, in the second iteration process, outputting a signal u of the first iteration 1 As input signal, sending the input signal to a power amplifier mathematical model to obtain output signal y of the PA mathematical model 2 Then calculating an error signal e 2 ：
e 2 ＝u 0 -y 2 ；
Will error signal e 2 Processing the signals by a digital filter to obtain a signal e' 2 To input a signal u 1 Processing the signal u 'by a delayer to obtain a signal u' 1 D is signal e' 2 Compensate to Signal u' 1 In the first iteration, an output signal u of the second iteration is obtained 2 ：
u 2 ＝u′ 1 +e′ 2 ；
S204, similarly, in the process of the kth iteration, the output signal u of the kth-1 iteration is output k-1 Sending the input signal into a power amplifier mathematical model to obtain an output signal y of the PA mathematical model k Then calculating an error signal e k ：
e k ＝u 0 -y k ；
Will error signal e k Processed by a digital filter to obtain a signal e' k Input signal u k-1 Processing the signal u 'by a delayer to obtain a signal u' k-1 D is signal e' k Compensate to Signal u' k-1 In the step (b), an output signal u of the kth iteration is obtained k ：
u k ＝u′ k-1 +e′ k ；
Wherein K =2,3, \8230, K;
and S205, after the K iterations are completed, taking the output signal of the K iteration as the finally obtained predistortion signal.
In the embodiment of the application, the digital filters adopted in each iteration process have the same time delay and passband frequency; the digital filter is an FIR filter; the time delay device adopted in each iteration process has the same time delay as the digital filter.
The digital predistortion correction method also comprises the step of adjusting the suppression frequency band:
the passband of the error signal in the iterative process is adjusted by controlling the passband range of the digital filter, so that the distortion suppression frequency band of the predistortion signal is adjusted.
In the embodiment of the application, when the passband range of the digital filter is controlled, the passband frequency of the digital filter can be controlled directly by replacing (adjusting) the filter; or a digital filter with adjustable passband frequency can be adopted to directly adjust the channel frequency of the digital filter so as to achieve the effect of adjusting the distortion suppression frequency band of the predistortion signal.
As shown in fig. 3, a digital predistortion correction apparatus with adjustable distortion suppression frequency band, includes:
the model building unit is used for collecting input and output signals of the power amplifier and modeling the power amplifier to obtain a power amplifier mathematical model;
the predistortion processing unit is used for carrying out iterative processing on the signal generated by the baseband information source through a power amplifier mathematical model, a digital filter and a delayer to obtain a predistortion signal;
and the conversion output unit is used for performing digital-to-analog conversion and up-conversion on the obtained predistortion signal, transmitting the predistortion signal to a power amplifier for amplification processing, and then outputting the predistortion signal to the outside.
The predistortion processing unit comprises a K-level predistortion processing module;
each stage of the predistortion processing module calculates an error caused by signal distortion after an input signal passes through a power amplifier mathematical model, and then compensates the error signal into the input signal passing through the delayer after the error signal is processed by a digital filter to obtain an output signal of the stage of the predistortion processing module;
for the 1 st-stage pre-distortion processing module, a signal generated by a baseband information source is used as an input signal, and an output signal of the signal is transmitted to the 2 nd-stage pre-distortion processing module; for the 2 nd-K-1 level predistortion processing modules, the signal output by the previous level predistortion processing module is used as an input signal, and the output signal of the previous level predistortion processing module is transmitted to the next level predistortion processing module; and for the K-level pre-distortion processing module, the signal output by the K-1 level pre-distortion processing module is used as an input signal, and the output signal of the K-1 level pre-distortion processing module is used as a final pre-distortion signal and is transmitted to the conversion output unit.
In the embodiment of the present application, the principle of the predistortion processing unit is as shown in fig. 4, where x (n) denotes the source signal. u (n) represents the signal obtained by predistortion treatment, f (-) represents the power amplifier model, in the predistortion treatment unit, each level of predistortion quantity module calculates the error caused by signal distortion after passing the input signal through the power amplifier mathematical model f (-) and then compensates the error signal after passing through the digital filter DF until the error signal passes through the delayer z -d To obtain the output signal of the stage of pre-distortion processing module.
In summary, the present invention can adjust the frequency range of the nonlinear distortion suppression, such as adjusting to only suppress the nonlinear distortion of the adjacent channel frequency band or adjusting to only suppress the nonlinear distortion of the main channel frequency band according to the requirement, so that the digital predistortion method can still suppress the nonlinear distortion of the channel in the required frequency band in a targeted manner under the condition of strong distortion of the power amplifier, thereby improving the distortion suppression effect of the power amplifier.
Claims (8)
1. A digital predistortion correction method with adjustable distortion suppression frequency band is characterized in that: the method comprises the following steps:
s1, collecting input and output signals of a power amplifier, and modeling the power amplifier to obtain a power amplifier mathematical model;
s2, performing iterative processing on a signal generated by a baseband information source based on a power amplifier mathematical model, a digital filter and a delayer, wherein during each iterative processing, an input signal passes through the power amplifier mathematical model to calculate an error caused by signal distortion, then the error signal is compensated into the input signal passing through the delayer after being processed by the digital filter, and a predistortion signal is obtained after K iterations;
the step S2 includes the following substeps:
s201, setting a digital signal generated by a baseband information source as u 0 ；
S202, in the first iteration process, a digital signal u from a baseband information source is obtained 0 As input signal, sending the input signal to a power amplifier mathematical model to obtain output signal y of the PA mathematical model 1 Then calculating an error signal e 1 ：
e 1 ＝u 0 -y 1 ；
Will error signal e 1 Processing the signals by a digital filter to obtain a signal e' 1 To input a signal u 0 Processing the signal u 'through a time delay device to obtain a signal u' 0 D is signal e' 1 Compensate to Signal u' 0 In the first iteration, an output signal u is obtained 1 ：
u 1 ＝u′ 0 +e′ 1 ；
S203, in the second iteration process, outputting a signal u of the first iteration 1 As input signal, sending the input signal to a power amplifier mathematical model to obtain output signal y of the PA mathematical model 2 Then calculating an error signal e 2 ：
e 2 ＝u 0 -y 2 ；
Will error signal e 2 Processed by a digital filter to obtain a signal e' 2 Input signal u 1 Processing the signal u 'through a time delay device to obtain a signal u' 1 D is signal e' 2 Compensate to Signal u' 1 To obtain an output signal u for the second iteration 2 ：
u 2 ＝u′ 1 +e′ 2 ；
S204, similarly, in the process of the kth iteration, the output signal u of the kth-1 iteration is processed k-1 Sending the input signal into a power amplifier mathematical model to obtain an output signal y of the PA mathematical model k Then calculating an error signal e k ：
e k ＝u 0 -y k ；
Error signal e k Number of passesThe signal e 'is obtained after the processing of the digital filter' k Input signal u k-1 Processing the signal u 'through a time delay device to obtain a signal u' k-1 D is signal e' k Compensate to Signal u' k-1 To obtain the output signal u of the kth iteration k ：
u k ＝u′ k-1 +e′ k ；
Wherein K =2,3, \8230, K;
and S205, after the K iterations are completed, taking the output signal of the K iteration as the finally obtained predistortion signal.
2. The digital predistortion correction method of adjustable distortion rejection frequency band according to claim 1, characterized in that: the digital predistortion correction method further comprises a conversion output step S3:
and D/A conversion and up-conversion are carried out on the predistortion signal obtained in the step S2, and then the predistortion signal is transmitted to a power amplifier for amplification processing and then is output externally.
3. The digital predistortion correction method of adjustable distortion rejection frequency band of claim 1, characterized in that: the power amplifier mathematical model in step S1 includes but is not limited to a GMP model, and the GMP model is expressed as:
in the formula, x (n) represents an input signal at the time of n, x (n-q) represents an input signal at the time of (n-q), and f (x (n)) represents an output signal of a power amplifier mathematical model; k 1 And K 2 Is a non-linear order; q 1 And Q 2 The memory depth; m is the cross term memory depth, K in the model 1 、K 2 、Q 1 、Q 2 And M are both preset known parameters;
collecting input and output signals of a power amplifier, and fitting out a model coefficient c kq And c kqm And finishing the construction of the power amplifier mathematical model.
4. The digital predistortion correction method of adjustable distortion rejection frequency band according to claim 1, characterized in that: the digital filters used in each iteration have the same delay and passband frequency.
5. The digital predistortion correction method of adjustable distortion rejection frequency band according to claim 4, characterized in that: the digital filter is an FIR filter; the time delay device adopted in each iteration process has the same time delay as the digital filter.
6. The digital predistortion correction method of adjustable distortion rejection frequency band according to claim 4, characterized in that: the digital predistortion correction method also comprises the step of adjusting the suppression frequency band:
the passband of the error signal in the iterative process is adjusted by controlling the passband range of the digital filter, so that the distortion suppression frequency band of the predistortion signal is adjusted.
7. A digital predistortion correction device with adjustable distortion suppression frequency band, which adopts the method as claimed in any one of claims 1 to 6, characterized in that: the method comprises the following steps:
the model building unit is used for collecting input and output signals of the power amplifier and modeling the power amplifier to obtain a power amplifier mathematical model;
the predistortion processing unit is used for carrying out iterative processing on the signal generated by the baseband information source through a power amplifier mathematical model, a digital filter and a delayer to obtain a predistortion signal;
and the conversion output unit is used for performing digital-to-analog conversion and up-conversion on the obtained predistortion signal, transmitting the predistortion signal to a power amplifier for amplification, and outputting the predistortion signal to the outside.
8. The digital predistortion correction device with adjustable distortion rejection frequency band according to claim 7, characterized in that: the predistortion processing unit comprises a K-level predistortion processing module;
each stage of the predistortion processing module calculates an error caused by signal distortion after an input signal passes through a power amplifier mathematical model, and then compensates the error signal into the input signal passing through the delayer after the error signal is processed by a digital filter to obtain an output signal of the stage of the predistortion processing module;
for the 1 st-stage pre-distortion processing module, a signal generated by a baseband information source is used as an input signal, and an output signal of the baseband information source is transmitted to the 2 nd-stage pre-distortion processing module; for the 2 nd-K-1 level predistortion processing modules, the signal output by the previous level predistortion processing module is used as an input signal, and the output signal of the previous level predistortion processing module is transmitted to the next level predistortion processing module; and for the K-stage pre-distortion processing module, the signal output by the K-1-stage pre-distortion processing module is used as an input signal, and the output signal of the K-1-stage pre-distortion processing module is used as a final pre-distortion signal and is transmitted to the conversion output unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011579438.1A CN112787600B (en) | 2020-12-28 | 2020-12-28 | Digital predistortion correction method and device with adjustable distortion suppression frequency band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011579438.1A CN112787600B (en) | 2020-12-28 | 2020-12-28 | Digital predistortion correction method and device with adjustable distortion suppression frequency band |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112787600A CN112787600A (en) | 2021-05-11 |
| CN112787600B true CN112787600B (en) | 2022-11-08 |
Family
ID=75752867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011579438.1A Active CN112787600B (en) | 2020-12-28 | 2020-12-28 | Digital predistortion correction method and device with adjustable distortion suppression frequency band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112787600B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113381705B (en) * | 2021-06-22 | 2022-11-15 | 电子科技大学 | Digital predistortion implementation system and method in hardware scene |
| CN113612452B (en) * | 2021-08-11 | 2023-09-26 | 电子科技大学 | Digital predistortion correction method and device with frequency selection characteristic |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1870614A (en) * | 2005-05-27 | 2006-11-29 | 华为技术有限公司 | Universal device for predistortion processing base band digital signal |
| CN107565914A (en) * | 2017-07-26 | 2018-01-09 | 东南大学 | The digital pre-distortion system and its method of biobelt envelope tracking power amplifier are sent out altogether |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2373417B (en) * | 2001-03-13 | 2004-06-09 | Tandberg Television Asa | Satellite communication apparatus |
| US6812792B2 (en) * | 2003-01-02 | 2004-11-02 | Harris Corporation | Precorrection of a nonlinear amplifier |
| US8126036B2 (en) * | 2008-06-21 | 2012-02-28 | Vyycore Corporation | Predistortion and post-distortion correction of both a receiver and transmitter during calibration |
| CN100594669C (en) * | 2008-07-18 | 2010-03-17 | 东南大学 | Power amplifier predistortion method of Hammerstein model based on fuzzy neural network |
| CN101997492A (en) * | 2010-09-29 | 2011-03-30 | 东南大学 | Simplified fuzzy neural network reinforced Wiener model based power amplifier predistortion method |
| CN103326973B (en) * | 2013-07-03 | 2016-12-28 | 苏州工业园区昶辰通信科技有限公司 | Distorted characteristic estimation algorithm pre-distortion device and method |
| CN106506417B (en) * | 2017-01-03 | 2020-01-24 | 电子科技大学 | Narrow-band feedback digital predistortion system and method |
| CN111064439B (en) * | 2019-12-31 | 2023-09-05 | 西安烽火电子科技有限责任公司 | System and method for improving short wave digital predistortion performance |
| CN111245377B (en) * | 2020-03-20 | 2021-11-05 | 厦门大学 | Digital predistortion system and method based on direct learning structure |
| CN111585608B (en) * | 2020-05-07 | 2022-03-22 | 中国人民解放军63921部队 | Adaptive digital predistortion method for broadband spread frequency hopping system |
-
2020
- 2020-12-28 CN CN202011579438.1A patent/CN112787600B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1870614A (en) * | 2005-05-27 | 2006-11-29 | 华为技术有限公司 | Universal device for predistortion processing base band digital signal |
| CN107565914A (en) * | 2017-07-26 | 2018-01-09 | 东南大学 | The digital pre-distortion system and its method of biobelt envelope tracking power amplifier are sent out altogether |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112787600A (en) | 2021-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112787600B (en) | Digital predistortion correction method and device with adjustable distortion suppression frequency band | |
| CN107078980B (en) | Analog predistorter core module and analog predistorter system | |
| US7113036B2 (en) | Method and apparatus for adaptive digital predistortion using nonlinear and feedback gain parameters | |
| CN106506417B (en) | Narrow-band feedback digital predistortion system and method | |
| 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 | |
| US8903015B2 (en) | Apparatus and method for digital predistortion of non-linear amplifiers | |
| CN106170918A (en) | Linear damage modeling and the method for performance is adjusted in order to improve digital pre-distortion | |
| US9276533B2 (en) | Distortion compensation apparatus and method | |
| US20150031317A1 (en) | Apparatus and methods for providing a power amplifier with interference cancellation | |
| CN111064439B (en) | System and method for improving short wave digital predistortion performance | |
| US7194043B2 (en) | System and method for predistorting a signal to reduce out-of-band error | |
| CN101217522A (en) | A method and device to determine the predistortion parameter of open loop, commutator and commutating method | |
| CN114400979A (en) | System and method for improving digital predistortion of short wave interaction and harmonic distortion | |
| CN111245377B (en) | Digital predistortion system and method based on direct learning structure | |
| CN111010095B (en) | Broadband power amplifier linearization processing method and system of wireless communication system | |
| CN113612452B (en) | Digital predistortion correction method and device with frequency selection characteristic | |
| JP6035919B2 (en) | Transmission device and transmission method | |
| CN101695061A (en) | Linearization device and linearization method in broad band multicarrier communication system | |
| CN113114125A (en) | Digital predistortion correction method and system for double-loop resolving | |
| US10826444B2 (en) | Method for producing an amplification stage for a variable envelope signal | |
| CN106777533B (en) | Power amplifier nonlinear simulation method based on lookup table | |
| RU2731128C1 (en) | Method for combined digital linearization of power amplifier and quadrature modulator | |
| CN112636699A (en) | High-precision digital predistortion correction method and device based on iterative feedback | |
| US9628305B2 (en) | Systems and methods to compensate for memory effects using enhanced memory polynomials | |
| RU197110U1 (en) | Power Amplifier Distortion Corrector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |