CN106453173A - Pre-distortion parameter estimation system and wireless transmitting system - Google Patents
Pre-distortion parameter estimation system and wireless transmitting system Download PDFInfo
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- CN106453173A CN106453173A CN201611059749.9A CN201611059749A CN106453173A CN 106453173 A CN106453173 A CN 106453173A CN 201611059749 A CN201611059749 A CN 201611059749A CN 106453173 A CN106453173 A CN 106453173A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
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Abstract
The invention discloses a pre-distortion parameter estimation system and a wireless transmitting system. The pre-distortion parameter estimation system comprises a power amplifier module, a spectrum analyzer, a computer and a vector signal source, wherein the power amplifier module carries out power amplification on an input signal; the spectrum analyzer receives an analog signal output by the power amplifier module and carries out sampling conversion on the analog signal to form a baseband digital signal; the computer carries out pre-distortion parameter estimation according to the baseband digital signal sent by the spectrum analyzer and a pre-distortion parameter sent to the vector signal source in order to obtain the pre-distortion parameter and a pre-distortion signal; and the vector signal source receives the pre-distortion signal sent by the computer, converts the pre-distortion signal to the analog signal and sends the pre-distortion signal to the power amplifier module at a preset radio frequency. According to the technical scheme, the pre-distortion parameter can be obtained iteratively, a feedback radio frequency link and a feedback analog-to-digital converter in a wireless transmitter are omitted, the power consumption is reduced and the cost is saved.
Description
Technical field
The present invention relates to wireless communication technology field, particularly to a kind of pre-distortion parameters estimating system and wireless transmission system
System.
Background technology
The number of mobile users of wireless communication system increases, transmission range lengthens, and requires the power amplifier output of equipment
Higher transmission power, could ensure the high performance requirements of practical communication system speech quality.Power amplifier is as channel radio
The important component part of letter system, is usually operated in inelastic region, is even operated near saturation region, this can bring apparent
Non-linear distortion.Existing settling mode is to increase feedback radio frequency link and feedback A/Ds use in wireless launcher
Estimate in pre-distortion parameters, but such way, by the obvious hardware cost increasing equipment, power consumption, also add equipment simultaneously
Volume and weight.
Content of the invention
The main object of the present invention is to provide a kind of pre-distortion parameters estimating system, it is desirable to provide one kind can save hardware
The pre-distortion parameters estimating system of cost.
For achieving the above object, a kind of pre-distortion parameters estimating system proposed by the present invention, including power amplifier module, frequently
Spectrometer, computer and vector signal source；Wherein,
Described power amplifier module, the signal of input is carried out power amplification；
Described spectrum analyzer, receives the analog signal of described power amplifier module output, and sample conversion is base-band digital
Signal；
Described computer, according to described spectrum analyzer send baseband digital signal and be sent to described vector signal source
Pre-distortion parameters carry out pre-distortion parameters estimation, obtain pre-distorted signals and pre-distortion parameters；
Described vector signal source, receives the described pre-distorted signals that computer sends, converts thereof into analog signal, and with
Default rf frequency is sent to described power amplifier module.
Preferably, the output end of described power amplifier module is connected with the sampling end of described spectrum analyzer, described frequency spectrum
The output end of analyzer is connected with the input of described computer, and the output end of described computer is defeated with described vector signal source
Enter end to connect, the output end of described vector signal source is connected with the input of described power amplifier module.
Preferably, pre-distortion parameters are estimated to be based on memory polynomial model：
Wherein x (n) be described power amplifier module the n moment signal input, y (n) is described power amplifier module in the n moment
Signal output, k is non-linear exponent number, and q is memory depth, and the n sampling of the y (n) based on collection and the n+q sampling of x (n) come
Estimate described pre-distortion parameters b, have equation below：
There is Y=XB, given X and Y, described pre-distortion parameters B=(X is calculated using least square methodHX)-1XHY.
Preferably, also include attenuator；Described attenuator input is connected with described power amplifier module output end, described
Attenuator output end is connected with described spectrum analyzer sampling end, and the signal inputting described spectrum analyzer is carried out pre- decay,
To protect described spectrum analyzer.
Preferably, the bandwidth of operation of described spectrum analyzer is 5 to 10 times of the bandwidth of operation of described power amplifier module.
Preferably, the bandwidth of operation of described vector signal source is 5 to 10 times of the bandwidth of operation of described power amplifier module.
Preferably, the sampling rate of described spectrum analyzer and described vector signal source is identical.
Preferably, described power amplifier module and described spectrum analyzer and vector signal source are all connected by RF cable
Connect.
Preferably, described computer is all connected by netting twine with described spectrum analyzer and described vector signal source.
The present invention also proposes a kind of wireless transmitting system, including pre-distortion module, digital to analog converter, radio-frequency transmissions mould
Block and pre-distortion parameters estimating system；Described pre-distortion parameters estimating system includes power amplifier module, spectrum analyzer, calculating
Machine and vector signal source；The output end of described power amplifier module is connected with the sampling end of described spectrum analyzer, described frequency spectrum
The output end of analyzer is connected with the input of described computer, and the output end of described computer is defeated with described vector signal source
Enter end to connect, the output end of described vector signal source is connected with the input of described power amplifier module；Described power amplification mould
Block, the signal of input is carried out power amplification；Described spectrum analyzer, receives the simulation letter of described power amplifier module output
Number, sample conversion is baseband digital signal；Described computer, according to described spectrum analyzer send baseband digital signal and send out
The pre-distortion parameters delivering to described vector signal source carry out pre-distortion parameters estimation, obtain pre-distorted signals and pre-distortion parameters；
Described vector signal source, is received the described pre-distorted signals of what computer sent, converts thereof into analog signal, and penetrated with default
Again and again rate is sent to described power amplifier module；
The output end of described pre-distortion module is connected with the input of described digital to analog converter, described digital to analog converter
Output end be connected with the input of described radiofrequency emitting module, the output end of described radiofrequency emitting module and described power amplification
The input of module connects, the parameter output of described computer with described with pre-distortion module parameter receiving terminal even
Connect；Wherein,
Described pre-distortion module, according to the calculated pre-distortion parameters of described pre-distortion parameters estimating system to defeated
The baseband signal entering carries out precorrection；
Described digital to analog converter, converts digital signals into analog signal；
Described radiofrequency emitting module, the signal of input is carried out frequency conversion, filtering, is converted to the radiofrequency signal of predetermined power.
The present invention passes through power amplifier module, spectrum analyzer, computer and vector signal source, defines a kind of predistortion
Parameter estimation system, by the signal of spectrum analyzer receiving power amplification module, is transferred to described computer after sample conversion,
Computer goes out pre-distorted signals according to this signal of change, and is carried out changing, fed back to described power by described vector signal source
Amplification module, by the continuous iteration of this backfeed loop, thus calculate pre-distortion parameters by computer.Energy iteration of the present invention
Obtain the pre-distortion parameters of power amplifier module, eliminate the feedback radio-frequency module in existing system, feed back digital to analog converter etc.
Module, has saved hardware cost, decreases the power consumption of system and device.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Structure according to these accompanying drawings obtains other accompanying drawings.
Fig. 1 is the functional block diagram of pre-distortion parameters estimating system one embodiment of the present invention；
Fig. 2 is the functional block diagram of wireless transmitting system one embodiment of the present invention；
Fig. 3 is the functional block diagram of pre-distortion module in wireless transmitting system of the present invention.
Drawing reference numeral explanation：
| Label | Title | Label | Title |
| 100 | Pre-distortion parameters estimating system | 120 | Spectrum analyzer |
| 200 | Pre-distortion module | 130 | Computer |
| 300 | Digital to analog converter | 140 | Vector signal source |
| 400 | Radiofrequency emitting module | 150 | Attenuator |
| 110 | Power amplifier module | 210 | Pre-distortion parameters table |
The realization of the object of the invention, functional characteristics and advantage will be described further in conjunction with the embodiments referring to the drawings.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of not making creative work all its
His embodiment, broadly falls into the scope of protection of the invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In explaining the relative position relation between each part, motion conditions etc. under a certain particular pose (as shown in drawings), if should
When particular pose changes, then directionality instruction also correspondingly changes therewith.
In addition, the description being related to " first ", " second " etc. in the present invention is only used for describing purpose, and it is not intended that referring to
Show or imply its relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", "
Two " feature can be expressed or implicitly include at least one this feature.In addition, the technical scheme between each embodiment can
To be combined with each other, but must be capable of by those of ordinary skill in the art based on, when the combination of technical scheme occurs
Conflicting or will be understood that the combination of this technical scheme does not exist, also not in the protection model of application claims when cannot realize
Within enclosing.
The present invention proposes a kind of pre-distortion parameters estimating system.
With reference to Fig. 1, including power amplifier module 110, spectrum analyzer 120, computer 130 and vector signal source 140；Its
In, described power amplifier module 110, the signal of input is carried out power amplification；Described spectrum analyzer 120, receives described work(
The analog signal of rate amplification module 110 output, sample conversion is baseband digital signal；Described computer 130, according to described frequency spectrum
Baseband digital signal that analyzer 120 sends and be sent to the pre-distortion parameters of described vector signal source 140 and carry out predistortion ginseng
Number is estimated, obtains pre-distorted signals and pre-distortion parameters；Described vector signal source 140, receives the described predistortion of computer 130
Signal, converts thereof into analog signal, and is sent to described power amplifier module 110 with default rf frequency.
It should be noted that predistortion is exactly artificially to add a characteristic and the system including power amplifier module
The just the opposite system of non-linear distortion, is compensated mutually, reduces the distortion of signal system.
It should be noted that the pre-distortion parameters that the computer 130 in the present invention calculates are continuous iteration producing.Repeatedly
Generation is the activity repeating feedback procedure, and its purpose is typically to approaching required target or result.Repetition to process each time
It is referred to as once " iteration ", and the result that iteration obtains each time can be used as the initial value of next iteration.Computer 130 is counted every time
The pre-distortion parameters calculating are transferred to described power amplifier module 110 by vector signal source 140 and are amplified, then pass through frequency spectrum
The collection of analyzer 120 feeds back to computer 130, the reference data that the signal that this feeds back to is estimated as this predistortion again,
And then it is repeated continuously feedback procedure, make the pre-distortion parameters of acquisition constantly approach the pre-distortion parameters of standard.
The present invention passes through power amplifier module 110, spectrum analyzer 120, computer 130 and vector signal source 140, is formed
A kind of pre-distortion parameters estimating system 100, by the signal of spectrum analyzer 120 receiving power amplification module 110, sampling turns
It is transferred to described computer 130, computer 130 goes out pre-distorted signals according to this signal of change, and believes by described vector after changing
Number source 140 carries out changing, feeds back to described power amplifier module 110, by the continuous iteration of this backfeed loop, thus by calculating
Machine 130 calculates pre-distortion parameters.The pre-distortion parameters of the acquisition power amplifier module 110 of energy iteration of the present invention, eliminate existing
There is the feedback radio-frequency module in system, feed back the modules such as digital to analog converter, saved hardware cost, decreased the work(of system and device
Consumption.
Specifically, the output end of described power amplifier module 110 is connected with the sampling end of described spectrum analyzer 120, institute
The output end stating spectrum analyzer 120 is connected with the input of described computer 130, the output end of described computer 130 and institute
State the input connection of vector signal source 140, the output end of described vector signal source 140 and described power amplifier module 110
Input connects.
Specifically, pre-distortion parameters are estimated to be based on memory polynomial model：
Wherein x (n) be described power amplifier module 110 the n moment signal input, y (n) is described power amplifier module 110 in n
The signal output in moment, the n sampling of the y (n) based on collection and n+q of x (n) sample to estimate described pre-distortion parameters b,
There is equation below：
There is Y=XB, given X and Y, described pre-distortion parameters B=(X is calculated using least square methodHX)-1XHY.
It should be noted that least square method is a kind of mathematical optimization techniques.It is sought by the quadratic sum minimizing error
The optimal function looking for data is mated.Unknown data can easily be tried to achieve using least square method, and these are tried to achieve
Between data and real data, the quadratic sum of error is minimum.
Specifically, also include attenuator 150；Described attenuator 150 input and described power amplifier module 110 output end
Connect, described attenuator 150 output end is connected with described spectrum analyzer 120 sampling end, will input described spectrum analyzer 120
Signal carry out pre- decay, to protect described spectrum analyzer 120.
It should be noted that attenuator is a kind of electronic devices and components providing decay, it is widely used in electronic equipment,
It is mainly used for：(1) in adjustment circuit signal size；(2) in comparative method for measuring circuit, can be used to direct-reading by survey grid
The pad value of network；(3) improve impedance matching, if some circuit requirements have a more stable load impedance, can here
Insert an attenuator between circuit and actual loading impedance, the change of impedance can be buffered.
Further, in the present invention, this attenuator 150 is used for adjusting signal, it is to avoid signal is excessive and damage that instrument is caused
Evil.
Specifically, the bandwidth of operation of described spectrum analyzer 120 is the 5 of the bandwidth of operation of described power amplifier module 110
To 10 times.
Specifically, the bandwidth of operation of described vector signal source 140 is the 5 of the bandwidth of operation of described power amplifier module 110
To 10 times.
It should be noted that because the nonlinear characteristic of power amplifier module 110, usually requiring that vector signal source 140
With 5-10 times of a width of power amplifier module 110 desired operation bandwidth, the desired output 5MHz letter of such as power amplifier module 110
Number, need input signal to support 25～50MHz bandwidth.The bandwidth of spectrum analyzer 120 also must be power amplifier module 110 phase
Hope bandwidth of operation 5-10 times, and related to feature power amplifier module 110.
Further, spectrum analyzer 120 and vector signal source 140 can with different sampling rates, but calculate pre-
Require during distortion parameter to keep consistent with another sampling rate after one of sampling rate resampling.
Specifically, in the embodiment of the present invention, the sampling rate of described spectrum analyzer 120 and described vector signal source 140
Identical.
Specifically, described power amplifier module 110 and described spectrum analyzer 120 and vector signal source 140 all pass through to penetrate
Frequency cable connects.
Specifically, described computer 130 and described spectrum analyzer 120 and described vector signal source 140 all pass through netting twine
Connect.
The present invention passes through power amplifier module 110, spectrum analyzer 120, computer 130 and vector signal source 140 and is formed
One pre-distortion parameters estimates backfeed loop.Gather the output of power amplifier module 110, computer by spectrum analyzer 120
130 estimation pre-distortion parameters, and pre-distortion parameters are sent to by power amplifier module 110 by vector signal source 140.By this
The continuous iteration of backfeed loop, and then obtain accurate pre-distortion parameters.The present invention also adds in the sampling end of spectrum analyzer 120
Connect attenuator 150, it is to avoid sampled signal is excessive and damage that spectrum analyzer 120 is caused.Present invention saves pre- lose
The hardware cost of true parameter estimation apparatus, decreases power consumption.
With reference to Fig. 2, the present invention also proposes a kind of wireless transmitting system, and this wireless transmitting system includes pre-distortion module
200th, digital to analog converter 300, radiofrequency emitting module 400 and pre-distortion parameters estimating system 100 as above；Described predistortion
The output end of processing module 200 is connected with the input of described digital to analog converter 300, the output end of described digital to analog converter 300
It is connected with the input of described radiofrequency emitting module 400, the output end of described radiofrequency emitting module 400 and described power amplification mould
The input of block 110 connects, the parameter output of described computer 130 with described with pre-distortion module 200 parameter
Receiving terminal connects；Wherein, described pre-distortion module 200, calculated according to described pre-distortion parameters estimating system 100
Pre-distortion parameters carry out precorrection to the baseband signal of input；Described digital to analog converter 300, converts digital signals into simulation letter
Number；Described radiofrequency emitting module, the signal of input is carried out frequency conversion, filtering, is converted to the radiofrequency signal of predetermined power.This pre- mistake
Concrete structure reference above-described embodiment of true parameter estimation system 100, because wireless transmitting system employs above-mentioned all enforcement
Whole technical schemes of example, therefore at least have all beneficial effects that the technical scheme of above-described embodiment is brought, here is not
Repeat one by one again.
It should be noted that described pre-distortion module 200 is estimated offline according to pre-distortion parameters estimating system 100
To pre-distortion parameters to input baseband signal AM-AM and AM-PM characteristic carry out precorrection.By the pre- mistake after pre-distortion
True thermal compensation signal sends digital to analog converter 300 to and converts digital signals into analog if signal, radiofrequency emitting module 400, then
Intermediate-freuqncy signal is carried out intermediate frequency filtering and frequency conversion, to obtain low power radiofrequency signal, low power radiofrequency signal is put through power
Big module 110 amplification obtains radio frequency and amplifies signal.
With reference to Fig. 3, it is the pre-distortion module principle figure of the embodiment of the present invention.Further it is assumed that predistortion model
Represent pre-distortion parameters using 3 LUT, described memory polynomial module formula can be write as further：
Wherein, fi(abs(x(n-Ki))) correspond to different delays KiPre-distortion parameters look-up table lut (n-Ki), KiAnd Di
Value can be different.
The foregoing is only the preferred embodiments of the present invention, not thereby limit the present invention the scope of the claims, every this
Under the inventive concept of invention, the equivalent structure transformation made using description of the invention and accompanying drawing content, or directly/indirectly use
In the scope of patent protection that other related technical fields are included in the present invention.
Claims (10)
1. a kind of pre-distortion parameters estimating system it is characterised in that include power amplifier module, spectrum analyzer, computer and
Vector signal source；Wherein,
Described power amplifier module, the signal of input is carried out power amplification；
Described spectrum analyzer, receives the analog signal of described power amplifier module output, and sample conversion is baseband digital signal；
Described computer, according to described spectrum analyzer send baseband digital signal and be sent to the pre- of described vector signal source
Distortion parameter carries out pre-distortion parameters estimation, obtains pre-distorted signals and pre-distortion parameters；
Described vector signal source, receives the described pre-distorted signals that described computer sends, converts thereof into analog signal, and with
Default rf frequency is sent to described power amplifier module.
2. pre-distortion parameters estimating system as claimed in claim 1 is it is characterised in that the output end of described power amplifier module
It is connected with the sampling end of described spectrum analyzer, the output end of described spectrum analyzer is connected with the input of described computer,
The output end of described computer is connected with the input of described vector signal source, the output end of described vector signal source and described work(
The input of rate amplification module connects.
3. pre-distortion parameters estimating system as claimed in claim 2 is it is characterised in that pre-distortion parameters estimation is many based on memory
Item formula model：Wherein x (n) be described power amplifier module the n moment letter
Number input, y (n) is the signal output in the n moment for the described power amplifier module, k be non-linear exponent number, q be memory depth, be based on
The n+q sampling of the n sampling of the y (n) of collection and x (n), to estimate described pre-distortion parameters b, has equation below：
Y=[y (Q) y (Q+1) ... y (Q+N)]T,
B=[b00b10b20... bK0b01b11b21... bK1... b00b10b20... bKQ]T,
There is Y=XB, given X and Y, described pre-distortion parameters B=(X is calculated using least square methodHX)-1XHY.
4. pre-distortion parameters estimating system as claimed in claim 2 is it is characterised in that also include attenuator；Described attenuator
Input is connected with described power amplifier module output end, and described attenuator output end is with described spectrum analyzer sampling end even
Connect, the signal inputting described spectrum analyzer is carried out pre- decay, to protect described spectrum analyzer.
5. pre-distortion parameters estimating system as claimed in claim 4 is it is characterised in that the bandwidth of operation of described spectrum analyzer
For the bandwidth of operation of described power amplifier module 5 to 10 times.
6. pre-distortion parameters estimating system as claimed in claim 5 is it is characterised in that the bandwidth of operation of described vector signal source
For the bandwidth of operation of described power amplifier module 5 to 10 times.
7. pre-distortion parameters estimating system as claimed in claim 6 is it is characterised in that described spectrum analyzer and described vector
The sampling rate of signal source is identical.
8. the pre-distortion parameters estimating system as described in claim 1 to 7 any one is it is characterised in that described power amplification
Module is all connected by RF cable with described spectrum analyzer and vector signal source.
9. pre-distortion parameters estimating system as claimed in claim 8 is it is characterised in that described computer and described spectrum analysis
Instrument and described vector signal source are all connected by netting twine.
10. a kind of wireless transmitting system is it is characterised in that include pre-distortion module, digital to analog converter, radiofrequency emitting module
And the pre-distortion parameters estimating system as described in claim 1 to 9 any one；The output end of described pre-distortion module with
The input of described digital to analog converter connects, and the output end of described digital to analog converter is connected with the input of described radiofrequency emitting module
Connect, the output end of described radiofrequency emitting module is connected with the input of described power amplifier module, the parameter of described computer is defeated
Go out end with described with pre-distortion module parameter receiving terminal be connected；Wherein,
Described pre-distortion module, according to the calculated pre-distortion parameters of described pre-distortion parameters estimating system to input
Baseband signal carries out precorrection；
Described digital to analog converter, converts digital signals into analog signal；
Described radiofrequency emitting module, the signal of input is carried out frequency conversion, filtering, is converted to the radiofrequency signal of predetermined power.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107689896A (en) * | 2017-07-17 | 2018-02-13 | 武汉正维电子技术有限公司 | Signal delay method of estimation and device for base station digital pre-distortion system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7561636B2 (en) * | 2004-05-11 | 2009-07-14 | Samsung Electronics Co., Ltd. | Digital predistortion apparatus and method in power amplifier |
| CN103248597A (en) * | 2013-05-17 | 2013-08-14 | 上海无线通信研究中心 | Self-adaptive digital pre-distortion system based on reference signal and initialization correction method |
| CN103685111A (en) * | 2013-12-26 | 2014-03-26 | 大唐移动通信设备有限公司 | Calculating method of digital pre-distortion parameters and pre-distortion system |
| CN103731105A (en) * | 2014-01-03 | 2014-04-16 | 东南大学 | Amplifier digital pre-distortion device and method based on dynamic fuzzy neural network |
| CN104796364A (en) * | 2014-01-16 | 2015-07-22 | 京信通信***（中国）有限公司 | Pre-distortion parameter solving method and pre-distortion processing system |
-
2016
- 2016-11-24 CN CN201611059749.9A patent/CN106453173A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7561636B2 (en) * | 2004-05-11 | 2009-07-14 | Samsung Electronics Co., Ltd. | Digital predistortion apparatus and method in power amplifier |
| CN103248597A (en) * | 2013-05-17 | 2013-08-14 | 上海无线通信研究中心 | Self-adaptive digital pre-distortion system based on reference signal and initialization correction method |
| CN103685111A (en) * | 2013-12-26 | 2014-03-26 | 大唐移动通信设备有限公司 | Calculating method of digital pre-distortion parameters and pre-distortion system |
| CN103731105A (en) * | 2014-01-03 | 2014-04-16 | 东南大学 | Amplifier digital pre-distortion device and method based on dynamic fuzzy neural network |
| CN104796364A (en) * | 2014-01-16 | 2015-07-22 | 京信通信***（中国）有限公司 | Pre-distortion parameter solving method and pre-distortion processing system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107689896A (en) * | 2017-07-17 | 2018-02-13 | 武汉正维电子技术有限公司 | Signal delay method of estimation and device for base station digital pre-distortion system |
| CN107689896B (en) * | 2017-07-17 | 2020-06-09 | 武汉正维电子技术有限公司 | Signal delay estimation method and device for base station digital predistortion system |
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