CN110071883A - Microwave pre-distortion parameters estimation method, device and equipment, storage medium - Google Patents
Microwave pre-distortion parameters estimation method, device and equipment, storage medium Download PDFInfo
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- CN110071883A CN110071883A CN201810060026.3A CN201810060026A CN110071883A CN 110071883 A CN110071883 A CN 110071883A CN 201810060026 A CN201810060026 A CN 201810060026A CN 110071883 A CN110071883 A CN 110071883A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0475—Circuits with means for limiting noise, interference or distortion
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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 present invention discloses a kind of microwave pre-distortion parameters estimation method, device and equipment, computer readable storage medium, and the method comprising the steps of: obtaining the signal s of timing synchronization output1(n)；To the signal s1(n) it is handled, obtains the signal s of no amplifier distortion4(n)；According to the distortion model of amplifier, the signal s1(n) and the signal s4(n) estimation for carrying out pre-distortion parameters, obtains the estimated value g of non-once item pre-distortion parameters3.The present invention carries out the estimation of microwave pre-distortion parameters using the signal before channel equalization and the signal after channel counter-bonification；On the one hand be not in the problem of constant modulus signals are unable to estimate out pre-distortion parameters, can accurately estimate high-order term pre-distortion parameters；On the other hand do not have to increase radio frequency link in the originator of transmitter, reduce the complexity of originator radio frequency unit.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of microwave pre-distortion parameters estimation method, device and equipment,
Computer readable storage medium.
Background technique
Microwave communication techniques are a kind of efficient, high reliability Point-to-Point Data Transmission modes, due to passing through spacing wireless
It propagates, does not need to be laid with cable, cost is lower than traditional optical fiber transmission cost, has received widespread attention in recent years.
PA (Power Amplifier, power amplifier) is the Primary Component of microwave telecommunication system, and non-linear is power amplifier
Inherent characteristics.With the increase for sending power, the output of power amplifier no longer be entered as Linear Amplifer relationship, but occur full
With this saturation distortion can mathematically be modeled as non-linear distortion.
Reducing the non-linear most straightforward procedure influenced on microwave telecommunication system of power amplifier is to reduce the input power of power amplifier, i.e. function
Input power rollback is put, the cost of this method is reduction of microwave telecommunication system ODU's (OutDoor Unit, outdoor unit)
Maximum transmission power, while the power efficiency of power amplifier is reduced, reduce the distance of point-to-point transmission.Another more effectively side
Method is pre-distortion technology.This method can also improve microwave telecommunication system ODU most while reducing power amplifier non-linear effects
Big transmission power improves the power amplification efficiency of power amplifier.Pre-distortion technology in the prior art is used the received letter of microwave receiver
Number feedback to microwave transmitter carry out predistortion calculating, need to increase a complete signal feedback device from radio frequency to base band,
Cost of implementation is big.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of microwave pre-distortion parameters estimation method, device and equipment, meter
Calculation machine readable storage medium storing program for executing, to solve the problems, such as non-linear distortion in microwave telecommunication system.
It is as follows that the present invention solves technical solution used by above-mentioned technical problem:
According to an aspect of the present invention, a kind of microwave pre-distortion parameters estimation method provided, this method are used for microwave
Receiver, the method includes the steps:
Obtain the signal s of timing synchronization output1(n)；
To the signal s1(n) it is handled, obtains the signal s of no amplifier distortion4(n)；
According to the distortion model of amplifier, the signal s1(n) and the signal s4(n) estimating for pre-distortion parameters is carried out
Meter, obtains the estimated value g of non-once item pre-distortion parameters3。
According to another aspect of the present invention, a kind of microwave pre-distortion parameters estimation device provided, described device include
Obtain module, processing module and estimation module；
The acquisition module, for obtaining the signal s of timing synchronization output1(n)；
The processing module, for the signal s1(n) it is handled, obtains the signal s of no amplifier distortion4(n)；
The estimation module, for distortion model, the signal s according to amplifier1(n) and the signal s4(n) into
The estimation of row pre-distortion parameters obtains the estimated value g of non-once item pre-distortion parameters3。
According to another aspect of the present invention, a kind of microwave pre-distortion parameters estimation equipment provided, the equipment include:
The microwave pre-distortion parameters estimation journey that memory, processor and being stored in can be run on the memory and on the processor
Sequence, the microwave pre-distortion parameters estimation program realize above-mentioned microwave pre-distortion parameters estimation side when being executed by the processor
The step of method.
According to another aspect of the present invention, a kind of computer readable storage medium provided, it is described computer-readable to deposit
Microwave pre-distortion parameters estimation program is stored on storage media, when the microwave pre-distortion parameters estimation program is executed by processor
The step of realizing above-mentioned microwave pre-distortion parameters estimation method.
The microwave pre-distortion parameters estimation method of the embodiment of the present invention, device and equipment, computer readable storage medium, benefit
Microwave pre-distortion parameters estimation is carried out with the signal before channel equalization and the signal after channel counter-bonification；On the one hand will not go out
The problem of existing constant modulus signals are unable to estimate out pre-distortion parameters, can accurately estimate high-order term pre-distortion parameters；Another party
Face does not have to increase radio frequency link in the originator of transmitter, reduces the complexity of originator radio frequency unit.
Detailed description of the invention
Fig. 1 is the microwave pre-distortion parameters estimation method flow diagram of first embodiment of the invention；
Fig. 2 is another flow diagram of microwave pre-distortion parameters estimation method of first embodiment of the invention；
Fig. 3 is the microwave pre-distortion parameters estimation device structural schematic diagram of second embodiment of the invention；
Fig. 4 is schematic diagram of processing module structure in the microwave pre-distortion parameters estimation device of second embodiment of the invention；
Fig. 5 is another structural schematic diagram of microwave pre-distortion parameters estimation device of second embodiment of the invention；
Fig. 6 is that the microwave pre-distortion parameters of third embodiment of the invention estimate device structure schematic diagram；
Fig. 7-Fig. 8 is the microwave telecommunication system structural schematic diagram of the embodiment of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
In order to be clearer and more clear technical problems, technical solutions and advantages to be solved, tie below
Drawings and examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
First embodiment
As shown in Figure 1, first embodiment of the invention provides a kind of microwave pre-distortion parameters estimation method, this method is for micro-
Wave receiver, the method includes the steps:
S11, the signal s for obtaining timing synchronization output1(n)。
In the present embodiment, the signal s of timing synchronization output1It (n) is comprising radio channel multi-path decline distortion letter
Number and/or originator amplifier distortion signal.
It should be understood that in order to enable the signal s of timing synchronization output1(n) output signal-to-noise ratio reaches maximum, can be right
The signal s1(n) matched filtering is carried out.
S12, to the signal s1(n) it is handled, obtains the signal s of no amplifier distortion4(n)。
Below according to the signal s of timing synchronization output1(n) whether include radio channel multi-path decline distorted signal point
It is not illustrated:
In the first embodiment, if the signal s1(n) comprising radio channel multi-path decline distorted signal；Then to institute
State signal s1(n) time domain equalization, the signal s after obtaining time domain equalization are carried out2(n)；To the signal s2(n) it carries out sentencing reason firmly,
The signal dd (n) that sentenced that treated firmly；Molding filtration is carried out to the signal dd (n), the signal s after obtaining molding filtration3
(n)；To the signal s3(n) channel counter-bonification is carried out, the signal s of no amplifier distortion is obtained4(n)。
In the second embodiment, if the signal s1(n) radio channel multi-path decline distorted signal is not included；It is then right
The signal s1(n) time domain equalization, the signal s after obtaining time domain equalization are carried out2(n)；To the signal s2(n) it is sentenced firmly
Reason, the signal dd (n) that sentenced that treated firmly；Molding filtration is carried out to the signal dd (n), the signal after obtaining molding filtration
s3(n), the signal s after molding filtration3It (n) is the signal s4(n)。
In above two embodiment, to the signal s1(n) time domain equalization is carried out, the filter of balanced device can be obtained
Coefficient w (n) and the signal s after time domain equalization2(n).The filter of balanced device can eliminate the distortion of wireless channel, and multipath is believed
The distortion information in road is mainly reflected in w (n).When channel does not have multipath fading distorted signal, the filter coefficient of balanced device
An only intermediate virtual value, remaining is close to 0.
It, can be to the signal s in above two embodiment2(n) according to standard planisphere with minimum euclidean distance standard
It then carries out sentencing reason firmly, obtains the signal dd (n).It is relatively high in noise, it, can be extensive by sentencing firmly in balanced convergent situation
Appear again originator the baseband signalling without any distortion.
In above two embodiment, molding filtration can be root raised cosine filter.To signal of sentencing that treated firmly
Dd (n) can carry out integral multiple zero insertion first, obtain the signal s using root raised cosine filter3(n)。
In the first above-mentioned embodiment, to the signal s3(n) channel counter-bonification is carried out, i.e., by the filter of balanced device
Wave device coefficient w (n) counter-bonification is to s3(n), the only signal s without amplifier distortion is obtained4(n)。
In this embodiment, the channel counter-bonification can be realized by way of frequency domain compensation.As illustratively, frequency domain
The specific implementation process of compensation can be as follows:
1), to the coefficients w (n) of balanced device carry out L point FFT (Fast Fourier Transformation,
Fast Fourier transform) change to frequency domain, L is greater than the length of w (n), the part being greater than can be row that length is L with zero padding, w (k) to
Amount, L can select 512:
2), in frequency-domain calculations channel counter-bonification factor c (k)
Wherein, w (k)*It is the conjugation of w (k), σ2It is noise power.
3), by s3(n) it is divided into every section of L long, there are several segment data s of overlapping from beginning to end3,z(l), the length of overlapping can basis
The multidiameter delay of channel selects, to data s3,z(l) it does FFT transform and obtains s to frequency domain3,z(k)
4) counter-bonification s, is carried out to channel distortion in frequency domain4,z(k)=c (k) s3,z(k), when compensated signal becomes again
Domain obtains the time-domain signal comprising channel distortion:
5), to the s of all segmentations3(n) channel counter-bonification processing as above is carried out, can be obtained completely comprising wireless communication
The signal s of road distortion4(n)。
S13, the distortion model according to amplifier, the signal s1(n) and the signal s4(n) pre-distortion parameters are carried out
Estimation, obtain the estimated value g of non-once item pre-distortion parameters3。
In the present embodiment, according to the distortion model of amplifier, the signal s1(n) and the signal s4(n), it uses
Least square method carries out the estimation of pre-distortion parameters, obtains the estimated value g of non-once item pre-distortion parameters3。
By taking the distortion model of amplifier is the multinomial distortion model of three rank amplifiers as an example, the multinomial of three rank amplifiers
Distortion model is as follows: y=(g1+g3|x|2)x.Following estimation equation can be established:
G=Ps1(n), then g1=G (1), g3=G (2).
So far the estimated value g of pre-distortion parameters has been obtained1And g3, it can be seen that in above-mentioned estimation equation | s4(n) | be by
Signal after molding filtration, not constant modulus signals, so the non-once item in the multinomial distortion model of three rank amplifiers loses in advance
True parameter g3It can accurately be estimated by above-mentioned estimation equation.
It should be understood that can estimate pre-distortion parameters using multi-group data, then to estimation to increase the precision of estimation
As a result it is averaged.
It please refers to shown in Fig. 2, in one embodiment, the distortion model according to amplifier, the signal s1(n)
And the signal s4(n) estimation for carrying out pre-distortion parameters, obtains the estimated value g of non-once item pre-distortion parameters3It also wraps later
Include step:
S14, by the estimated value g of the non-once item pre-distortion parameters3Feed back to microwave transmitter.
In this embodiment, microwave transmitter receives the estimated value g of the non-once item pre-distortion parameters of feedback3, into
Row predistortion correction.The loop of a closed loop feedback is constituted between microwave transmitter and microwave receiver, is guaranteed in environment temperature
Degree variation when, microwave receiver can be with real-time estimation pre-distortion parameters, and feed back to microwave transmitter, microwave transmitter can and
The adjustment of Shi Jinhang predistortion.
In this embodiment, microwave transmitter can set 0 for non-once item pre-distortion parameters in the initial stage,
Start to update pre-distortion parameters after receiving the feedback of microwave receiver.
In this embodiment, first order pre-distortion parameters g1It is linear distortion, without feedback.
The present embodiment in order to better understand, below in conjunction with Fig. 7-Fig. 8 to microwave pre-distortion parameters in microwave telecommunication system
Estimation be illustrated.
It should be noted that the difference of Fig. 7 and Fig. 8 is, the microwave receiver of Fig. 8 has channel counter-bonification module, and
Fig. 7 does not have channel counter-bonification module.In order to describe conveniently, only it is illustrated below to 8.
As shown in figure 8, microwave telecommunication system includes microwave transmitter, wireless channel and microwave receiver.Usual situation
Under, microwave transmitter is provided simultaneously with microwave receiving function, and microwave receiver is provided simultaneously with Microwave emission function.
Baseband signal in microwave transmitter forms pre-distorted signals by originator predistortion, which passes through digital-to-analogue conversion
Device is transformed into analog domain, and power amplifier is reached after upconversion process, is then communicated to microwave receiver；Microwave receiver
The signal from microwave transmitter is received, down-converted is carried out, is then wrapped by analog-digital converter, timing synchronization
Signal s containing amplifier distortion1(n)。
The signal s of timing synchronization output1(n) by matched filter, channel equalization module and firmly sentence module it
Afterwards, the signal dd (n) after being sentenced firmly.Signal dd (n) after sentencing firmly carries out two times of zero insertions, obtains letter using formed filter
Number s3(n), by channel counter-bonification module to signal s3(n) channel counter-bonification is carried out, the signal s of no amplifier distortion is obtained4
(n).Finally, distortion model, signal s of the pre-distortion parameters estimation module according to amplifier1(n) and signal s4(n) it is lost in advance
The estimation of true parameter, obtains the estimated value g of non-once item pre-distortion parameters3。
Pre-distortion parameters estimation module is by the estimated value g of non-once item pre-distortion parameters3Feed back to the hair of microwave transmitter
Predistortion module is held, the adjustment of predistortion is carried out.
The microwave pre-distortion parameters estimation method of the embodiment of the present invention, using before channel equalization signal and channel is counter mends
Signal after repaying carries out the estimation of microwave pre-distortion parameters；It on the one hand is not in that constant modulus signals are unable to estimate out pre-distortion parameters
The problem of, it can accurately estimate high-order term pre-distortion parameters；On the other hand do not have to increase rf chain in the originator of transmitter
Road reduces the complexity of originator radio frequency unit.
Second embodiment
As shown in figure 3, second embodiment of the invention provides a kind of microwave pre-distortion parameters estimation device, described device includes
Obtain module 21, processing module 22 and estimation module 23；
The acquisition module 21, for obtaining the signal s of timing synchronization output1(n)。
In the present embodiment, the signal s of timing synchronization output1It (n) is comprising radio channel multi-path decline distortion letter
Number and/or originator amplifier distortion signal.
It should be understood that in order to enable the signal s of timing synchronization output1(n) output signal-to-noise ratio reaches maximum, can be right
The signal s1(n) matched filtering is carried out.
The processing module 22, for the signal s1(n) it is handled, obtains the signal s of no amplifier distortion4
(n)。
It please refers to shown in Fig. 4, in one embodiment, the processing module 22 includes first processing units 221 and the
Two processing units 222；
The first processing units 221, if being used for the signal s1(n) comprising radio channel multi-path decline distorted signal；
Then to the signal s1(n) it carries out time domain equalization, sentence reason, molding filtration and channel counter-bonification firmly, obtain the no amplification
The signal s of device distortion4(n)；
Described the second processing unit 222, if being used for the signal s1(n) radio channel multi-path decline distortion letter is not included
Number；Then to the signal s1(n) it carries out time domain equalization, sentence reason and molding filtration firmly, obtain the no amplifier distortion
Signal s4(n)。
Specifically, to the signal s1(n) time domain equalization is carried out, the coefficients w (n) and time domain of balanced device can be obtained
Signal s after equilibrium2(n).The filter of balanced device can eliminate the distortion of wireless channel, and the distortion information master of multipath channel
It is embodied in w (n).When channel does not have multipath fading distorted signal, the filter coefficient of balanced device only has intermediate one to have
Valid value, remaining is close to 0.
To the signal s2(n) reason is sentenced firmly with the least euclidean distance criteria progress according to standard planisphere, is sentenced firmly
Treated signal dd (n).It is relatively high in noise, in balanced convergent situation, originator can be recovered without any by sentencing firmly
The baseband signalling of distortion.
Molding filtration can be root raised cosine filter.To sentencing that treated firmly, signal dd (n) can carry out integral multiple first
Zero insertion, the signal s after molding filtration is obtained using root raised cosine filter3(n)。
To the signal s after molding filtration3(n) channel counter-bonification is carried out, i.e., is instead mended the coefficients w (n) of balanced device
Repay s3(n), the signal s of no amplifier distortion is obtained4(n)。
In this embodiment, the difference of described the second processing unit 222 and the first processing units 221 is, institute
Stating the second processing unit 222 does not have channel counter-bonification.Signal s after 222 molding filtration of the second processing unit3(n) it is
Signal s without amplifier distortion4(n)。
In this embodiment, the channel counter-bonification can be realized by way of frequency domain compensation.As illustratively, frequency domain
The specific implementation process of compensation can be as follows:
1), to the coefficients w (n) of balanced device carry out L point FFT (Fast Fourier Transformation,
Fast Fourier transform) change to frequency domain, L is greater than the length of w (n), the part being greater than can be row that length is L with zero padding, w (k) to
Amount, L can select 512:
2), in frequency-domain calculations channel counter-bonification factor c (k)
Wherein, w (k)*It is the conjugation of w (k), σ2It is noise power.
3), by s3(n) it is divided into every section of L long, there are several segment data s of overlapping from beginning to end3,z(l), the length of overlapping can basis
The multidiameter delay of channel selects, to data s3,z(l) it does FFT transform and obtains s to frequency domain3,z(k)
4) counter-bonification s, is carried out to channel distortion in frequency domain4,z(k)=c (k) s3,z(k), when compensated signal becomes again
Domain obtains the time-domain signal comprising channel distortion:
5), to the s of all segmentations3(n) channel counter-bonification processing as above is carried out, can be obtained completely comprising wireless communication
The signal s of road distortion4(n)。
The estimation module 23, for distortion model, the signal s according to amplifier1(n) and the signal s4(n)
The estimation for carrying out pre-distortion parameters, obtains the estimated value g of non-once item pre-distortion parameters3。
In the present embodiment, according to the distortion model of amplifier, the signal s1(n) and the signal s4(n), it uses
Least square method carries out the estimation of pre-distortion parameters, obtains the estimated value g of non-once item pre-distortion parameters3。
By taking the distortion model of amplifier is the multinomial distortion model of three rank amplifiers as an example, the multinomial of three rank amplifiers
Distortion model is as follows: y=(g1+g3|x|2)x.Following estimation equation can be established:
G=Ps1(n), then g1=G (1), g3=G (2).
So far the estimated value g of pre-distortion parameters has been obtained1And g3, it can be seen that in above-mentioned estimation equation | s4(n) | be by
Signal after molding filtration, not constant modulus signals, so the non-once item in the multinomial distortion model of three rank amplifiers loses in advance
True parameter g3It can accurately be estimated by above-mentioned estimation equation.
It should be understood that can estimate pre-distortion parameters using multi-group data, then to estimation to increase the precision of estimation
As a result it is averaged.
It please refers to shown in Fig. 5, in one embodiment, described device further includes feedback module 24；
The feedback module 24, for by the estimated value g of the non-once item pre-distortion parameters3Feed back to Microwave emission
Machine.
In this embodiment, microwave transmitter receives the estimated value g of the non-once item pre-distortion parameters of feedback3, into
Row predistortion correction.The loop of a closed loop feedback is constituted between microwave transmitter and microwave receiver, is guaranteed in environment temperature
Degree variation when, microwave receiver can be with real-time estimation pre-distortion parameters, and feed back to microwave transmitter, microwave transmitter can and
The adjustment of Shi Jinhang predistortion.
In this embodiment, microwave transmitter can set 0 for non-once item pre-distortion parameters in the initial stage,
Start to update pre-distortion parameters after receiving the feedback of microwave receiver.
In this embodiment, first order pre-distortion parameters g1It is linear distortion, without feedback.
The present embodiment in order to better understand, below in conjunction with Fig. 7-Fig. 8 to microwave pre-distortion parameters in microwave telecommunication system
Estimation be illustrated.
It should be noted that the difference of Fig. 7 and Fig. 8 is, the microwave receiver of Fig. 8 has channel counter-bonification module, and
Fig. 7 does not have channel counter-bonification module.In order to describe conveniently, only it is illustrated below to 8.
As shown in figure 8, microwave telecommunication system includes microwave transmitter, wireless channel and microwave receiver.Usual situation
Under, microwave transmitter is provided simultaneously with microwave receiving function, and microwave receiver is provided simultaneously with Microwave emission function.
Baseband signal in microwave transmitter forms pre-distorted signals by originator predistortion, which passes through digital-to-analogue conversion
Device is transformed into analog domain, and power amplifier is reached after upconversion process, is then communicated to microwave receiver；Microwave receiver
The signal from microwave transmitter is received, down-converted is carried out, is then wrapped by analog-digital converter, timing synchronization
Signal s containing amplifier distortion1(n)。
The signal s of timing synchronization output1(n) by matched filter, channel equalization module and firmly sentence module it
Afterwards, the signal dd (n) after being sentenced firmly.Signal dd (n) after sentencing firmly carries out two times of zero insertions, obtains letter using formed filter
Number s3(n), by channel counter-bonification module to signal s3(n) channel counter-bonification is carried out, the signal s of no amplifier distortion is obtained4
(n).Finally, distortion model, signal s of the pre-distortion parameters estimation module according to amplifier1(n) and signal s4(n) it is lost in advance
The estimation of true parameter, obtains the estimated value g of non-once item pre-distortion parameters3。
Pre-distortion parameters estimation module is by the estimated value g of non-once item pre-distortion parameters3Feed back to the hair of microwave transmitter
Predistortion module is held, the adjustment of predistortion is carried out.
The microwave pre-distortion parameters estimation device of the embodiment of the present invention, using before channel equalization signal and channel is counter mends
Signal after repaying carries out the estimation of microwave pre-distortion parameters；It on the one hand is not in that constant modulus signals are unable to estimate out pre-distortion parameters
The problem of, it can accurately estimate high-order term pre-distortion parameters；On the other hand do not have to increase rf chain in the originator of transmitter
Road reduces the complexity of originator radio frequency unit.
3rd embodiment
As shown in fig. 6, third embodiment of the invention provides a kind of microwave pre-distortion parameters estimation equipment, the equipment packet
It includes: memory 31, processor 32 and being stored in the microwave that can be run on the memory 31 and on the processor 32 and lose in advance
True Parameter estimation routines, when the microwave pre-distortion parameters estimation program is executed by the processor 32, for realizing following institute
The step of microwave pre-distortion parameters estimation method stated:
Obtain the signal s of timing synchronization output1(n)；
To the signal s1(n) it is handled, obtains the signal s of no amplifier distortion4(n)；
According to the distortion model of amplifier, the signal s1(n) and the signal s4(n) estimating for pre-distortion parameters is carried out
Meter, obtains the estimated value g of non-once item pre-distortion parameters3。
When microwave pre-distortion parameters estimation program is executed by the processor 32, it is also used to realize as described below micro-
The step of wave pre-distortion parameters estimation method:
If the signal s1(n) comprising radio channel multi-path decline distorted signal；Then to the signal s1(n) time domain is carried out
Reason, molding filtration and channel counter-bonification are sentenced in equilibrium firmly, obtain the signal s of the no amplifier distortion4(n)；
If the signal s1(n) radio channel multi-path decline distorted signal is not included；Then to the signal s1(n) when carrying out
Domain is balanced, sentences reason and molding filtration firmly, obtains the signal s of the no amplifier distortion4(n)。
When microwave pre-distortion parameters estimation program is executed by the processor 32, it is also used to realize as described below micro-
The step of wave pre-distortion parameters estimation method:
The channel counter-bonification is realized by way of frequency domain compensation.
When microwave pre-distortion parameters estimation program is executed by the processor 32, it is also used to realize as described below micro-
The step of wave pre-distortion parameters estimation method:
According to the distortion model of amplifier, the signal s1(n) and the signal s4(n), it is carried out using least square method
The estimation of pre-distortion parameters obtains the estimated value g of non-once item pre-distortion parameters3。
When microwave pre-distortion parameters estimation program is executed by the processor 32, it is also used to realize as described below micro-
The step of wave pre-distortion parameters estimation method:
By the estimated value g of the non-once item pre-distortion parameters3Feed back to microwave transmitter.
The microwave pre-distortion parameters of the embodiment of the present invention estimate equipment, using before channel equalization signal and channel is counter mends
Signal after repaying carries out the estimation of microwave pre-distortion parameters；It on the one hand is not in that constant modulus signals are unable to estimate out pre-distortion parameters
The problem of, it can accurately estimate high-order term pre-distortion parameters；On the other hand do not have to increase rf chain in the originator of transmitter
Road reduces the complexity of originator radio frequency unit.
Fourth embodiment
Fourth embodiment of the invention provides a kind of computer readable storage medium, deposits on the computer readable storage medium
Microwave pre-distortion parameters estimation program is contained, for realizing the when microwave pre-distortion parameters estimation program is executed by processor
Described in one embodiment the step of microwave pre-distortion parameters estimation method.
The computer readable storage medium of the embodiment of the present invention, using before channel equalization signal and channel counter-bonification it
Signal afterwards carries out the estimation of microwave pre-distortion parameters；It on the one hand is not in that constant modulus signals are unable to estimate out asking for pre-distortion parameters
Topic, can accurately estimate high-order term pre-distortion parameters；On the other hand do not have to increase radio frequency link, drop in the originator of transmitter
The complexity of low originator radio frequency unit.
It should be noted that above-mentioned apparatus embodiment and embodiment of the method belong to same design, specific implementation process is detailed
See embodiment of the method, and the technical characteristic in embodiment of the method is corresponding applicable in Installation practice, which is not described herein again.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to be realized by hardware, but very much
In the case of the former be more preferably embodiment.Based on this understanding, technical solution of the present invention is substantially in other words to existing
The part that technology contributes can be embodied in the form of software products, which is stored in a storage
In medium (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal device (can be mobile phone, calculate
Machine, server, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
Preferred embodiments of the present invention have been described above with reference to the accompanying drawings, not thereby limiting the scope of the invention.This
Without departing from the scope and spirit of the invention, there are many variations to implement the present invention by field technical staff, for example as one
The feature of a embodiment can be used for another embodiment and obtain another embodiment.It is all to use institute within technical concept of the invention
Any modifications, equivalent replacements, and improvements of work, should all be within interest field of the invention.
Claims (10)
1. a kind of microwave pre-distortion parameters estimation method, this method is used for microwave receiver, which is characterized in that the method includes
Step:
Obtain the signal s of timing synchronization output1(n)；
To the signal s1(n) it is handled, obtains the signal s of no amplifier distortion4(n)；
According to the distortion model of amplifier, the signal s1(n) and the signal s4(n) estimation for carrying out pre-distortion parameters, obtains
To the estimated value g of non-once item pre-distortion parameters3。
2. a kind of microwave pre-distortion parameters estimation method according to claim 1, which is characterized in that described to the signal
s1(n) it is handled, obtains the signal s of no amplifier distortion4(n) comprising steps of
If the signal s1(n) comprising radio channel multi-path decline distorted signal；Then to the signal s1(n) carry out time domain equalization,
Reason, molding filtration and channel counter-bonification are sentenced firmly, obtains the signal s of the no amplifier distortion4(n)；
If the signal s1(n) radio channel multi-path decline distorted signal is not included；Then to the signal s1(n) it is equal to carry out time domain
Weighing apparatus sentences reason and molding filtration firmly, obtains the signal s of the no amplifier distortion4(n)。
3. a kind of microwave pre-distortion parameters estimation method according to claim 2, which is characterized in that pass through frequency domain compensation
Mode realizes the channel counter-bonification.
4. a kind of microwave pre-distortion parameters estimation method according to claim 1, which is characterized in that described according to amplifier
Distortion model, the signal s1(n) and the signal s4(n) estimation for carrying out pre-distortion parameters, obtains non-once item and loses in advance
The estimated value g of true parameter3Comprising steps of
According to the distortion model of amplifier, the signal s1(n) and the signal s4(n), it is lost in advance using least square method
The estimation of true parameter, obtains the estimated value g of non-once item pre-distortion parameters3。
5. a kind of microwave pre-distortion parameters estimation method according to claim 1, which is characterized in that described according to amplifier
Distortion model, the signal s1(n) and the signal s4(n) estimation for carrying out pre-distortion parameters, obtains non-once item and loses in advance
The estimated value g of true parameter3It further comprises the steps of: later
By the estimated value g of the non-once item pre-distortion parameters3Feed back to microwave transmitter.
6. a kind of microwave pre-distortion parameters estimation device, which is characterized in that described device include obtain module, processing module and
Estimation module；
The acquisition module, for obtaining the signal s of timing synchronization output1(n)；
The processing module, for the signal s1(n) it is handled, obtains the signal s of no amplifier distortion4(n)；
The estimation module, for distortion model, the signal s according to amplifier1(n) and the signal s4(n) it carries out pre-
The estimation of distortion parameter obtains the estimated value g of non-once item pre-distortion parameters3。
7. a kind of microwave pre-distortion parameters estimation device according to claim 6, which is characterized in that the processing module packet
Include first processing units and the second processing unit；
The first processing units, if being used for the signal s1(n) comprising radio channel multi-path decline distorted signal；Then to described
Signal s1(n) it carries out time domain equalization, sentence reason, molding filtration and channel counter-bonification firmly, obtain the no amplifier distortion
Signal s4(n)；
Described the second processing unit, if being used for the signal s1(n) radio channel multi-path decline distorted signal is not included；Then to institute
State signal s1(n) it carries out time domain equalization, sentence reason and molding filtration firmly, obtain the signal s of the no amplifier distortion4(n)。
8. a kind of microwave pre-distortion parameters estimation device according to claim 6, which is characterized in that described device further includes
Feedback module；
The feedback module, for by the estimated value g of the non-once item pre-distortion parameters3Feed back to microwave transmitter.
9. a kind of microwave pre-distortion parameters estimate equipment, which is characterized in that the equipment includes: memory, processor and storage
On the memory and the microwave pre-distortion parameters estimation program that can run on the processor, microwave predistortion ginseng
Number estimation program realizes that the microwave pre-distortion parameters as described in any one of claims 1 to 5 are estimated when being executed by the processor
The step of meter method.
10. a kind of computer readable storage medium, which is characterized in that it is pre- to be stored with microwave on the computer readable storage medium
Distortion parameter estimates that program, the microwave pre-distortion parameters estimation program are realized when being executed by processor as in claim 1 to 5
The step of described in any item microwave pre-distortion parameters estimation methods.
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