CN104796096B - A kind of power amplifier feedback signal optimum phase system of selection and device - Google Patents
A kind of power amplifier feedback signal optimum phase system of selection and device Download PDFInfo
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- CN104796096B CN104796096B CN201410031083.0A CN201410031083A CN104796096B CN 104796096 B CN104796096 B CN 104796096B CN 201410031083 A CN201410031083 A CN 201410031083A CN 104796096 B CN104796096 B CN 104796096B
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Abstract
The invention provides a kind of feedback signal optimum phase system of selection and device, caching correlation is pre-set, methods described includes：Feedback data corresponding to output signal is grouped to obtain at least one set of packet feedback data according to phase；At least one set of packet feedback data is subjected to correlation computations with the output signal respectively, correlation corresponding to every set of group feedback data is drawn respectively, using maximum in the correlation as the maximum related value of the output signal；The caching the correlation whether maximum related value is more than in caching is judged, if it is, the caching correlation is updated into the maximum related value；Export phase corresponding to the caching correlation.By a kind of feedback signal optimum phase system of selection provided by the invention and device, adjust automatically threshold value can be carried out with the parameter change of output signal and amplifier, the optimum phase drawn is more accurate.
Description
Technical field
The present invention relates to signal processing technology field, more particularly to a kind of power amplifier feedback signal optimum phase to select
Method and device.
Background technology
In actual circuit, during power amplifier amplified signal, with the increase of input signal, output signal
Power can't linearly amplify.For the linearity of hoisting power amplifier, then need to the signal by power amplifier
Coupled Feedback is carried out, is calculated with this feedback signal with corresponding output signal, because feedback signal is for being related to feedback phase
The importance of computing is closed, the optimum phase of feedback signal is also particularly significant.
In the prior art, using calculating characteristic value (such as error signal, by phase detection signal and the Selecting phasing of previous round
Signal is compared, produce error signal) or peakvalue's checking result compared with fixed threshold, draw phase selection signal.
Wherein, peakvalue's checking result is prepared by the following：Training sequence code at least used in a carrier wave is extracted, to the carrier wave
Used training sequence code carries out simulation extension, obtains the simulated training sequence code signal of the carrier wave, using it is default extremely
Few two rotatable phases, the simulated training sequence code signal to the carrier wave carries out phase place, after the phase place
Spread training sequence code signal carries out peakvalue's checking.
It is visible by foregoing description, in the prior art, by fixed threshold set in advance come comparative feature value, and then
Go out phase selection signal, Selecting phasing adaptability is poor, it is impossible to adjust automatically with the change of signal, the relevant parameter of amplifier
Whole threshold value, the optimum phase drawn are not accurate enough.
The content of the invention
, can be with signal the invention provides a kind of power amplifier feedback signal optimum phase system of selection and device
Carry out adjust automatically threshold value with the parameter change of amplifier, the optimum phase drawn is more accurate.
On the one hand, the invention provides a kind of power amplifier feedback signal optimum phase system of selection, pre-set slow
Correlation is deposited, methods described includes：
Feedback data corresponding to output signal is grouped to obtain at least one set of packet feedback data according to phase；
At least one set of packet feedback data is subjected to correlation computations with the output signal respectively, drawn respectively each
Correlation corresponding to component group feedback data, using maximum in the correlation as the maximum related value of the output signal；
The caching the correlation whether maximum related value is more than in caching is judged, if it is, the caching is related
Value is updated to the maximum related value；
Export phase corresponding to the caching correlation.
Further, feedback data corresponding to output signal is grouped to obtain at least one set of point according to phase described
Before group feedback data, further comprise：The output signal is subjected to pre-distortion, the signal after pre-distortion is led to
Overpower amplifier is amplified to obtain feedback data corresponding to the output signal.
Further, the output signal is service signal, and/or, the output signal is cycle tests.
On the other hand, the invention provides a kind of power amplifier feedback signal optimum phase selection device, described device
Including：
Feedback data packet module, for feedback data corresponding to output signal to be grouped to obtain at least according to phase
Set of group feedback data；
Correlation value calculation module, at least one set of packet feedback data to be carried out into phase with the output signal respectively
Close and calculate, draw correlation corresponding to every set of group related data respectively, maximum at least one correlation is made
For the maximum related value of the output signal；
Judge module, the caching correlation pre-set whether being more than in caching for judging the maximum related value,
If it is, the caching correlation is updated to the maximum related value；
Output module, for exporting phase corresponding to the caching correlation.
Further, feedback data corresponding to the output signal meets：
The output signal is subjected to pre-distortion, the signal after pre-distortion is put by power amplifier
Feedback data corresponding to the output signal is obtained greatly.
Further, the output signal is service signal, and/or, the output signal is cycle tests.
, can be with by a kind of power amplifier feedback signal optimum phase system of selection provided by the invention and device
The parameter change of output signal and amplifier carrys out adjust automatically threshold value, and the optimum phase drawn is more accurate.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is a kind of power amplifier feedback signal optimum phase system of selection flow chart provided in an embodiment of the present invention；
Fig. 2 is a kind of power amplifier feedback signal optimum phase selection device structural representation provided in an embodiment of the present invention
Figure.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments, based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained on the premise of creative work is not made, belongs to the scope of protection of the invention.
The embodiments of the invention provide a kind of power amplifier feedback signal optimum phase system of selection, referring to Fig. 1, the party
Method includes：Pre-set caching correlation；Specific steps include：
Step 101：Feedback data corresponding to output signal is grouped to obtain at least one set and be grouped to feed back according to phase
Data；
Step 102：At least one set of feedback data that is grouped is subjected to correlation computations with the output signal respectively, respectively
Correlation corresponding to every set of group feedback data is drawn, using maximum in the correlation as the maximum of the output signal
Correlation；
Step 103：The caching the correlation whether maximum related value is more than in caching is judged, if it is, by described in
Caching correlation is updated to the maximum related value；
Step 104：Export phase corresponding to the caching correlation.
, can be with by the embodiments of the invention provide a kind of power amplifier feedback signal optimum phase system of selection
The parameter change of output signal and amplifier carrys out adjust automatically threshold value, and the optimum phase drawn is more accurate.
Before step 101, further comprise：The output signal is subjected to pre-distortion, after pre-distortion
Signal be amplified to obtain feedback data corresponding to the output signal by power amplifier.
The output signal is service signal, and/or, the output signal is cycle tests.
It should be noted that：In embodiments of the present invention, feedback signal corresponding to output signal and output signal is saved
In the buffer, each phase of feedback signal is carried out related operation with output signal successively, and by the result cache of related operation.
After all phases are calculated, it is compared according to the correlated results of phase, the maximum phase of its correlation is by as optimal
Phase, cache the optimum phase and maximum related value.
In threshold value renewal process afterwards, previous caching correlation is cached before renewal caches correlation, is being updated
During Selecting phasing it is same as the above-mentioned method, and by the correlation after renewal with caching correlation be compared, if newly
The maximum related value of calculating is more than caching correlation and is then updated, and does not change if correlation after renewal is less than caching correlation
Become caching correlation, configuration is re-started according to the optimum phase cached.
The method proposed from foregoing description, the embodiment of the present invention, can realize optimum phase in candidate phases,
It can ensure to prevent effect of optimization from deteriorating in follow-up parameter renewal, have extraordinary specific aim to digital pre-distortion flow
And optimization.
Method provided in an embodiment of the present invention, to redundant phase without directly selected particular phases, but first will feedback
Data are grouped by phase, and packet feedback data calculates correlation with output signal successively, and is compared with caching correlation.
The embodiments of the invention provide a kind of power amplifier feedback signal optimum phase selection device, referring to Fig. 2, the dress
Put including：
Feedback data packet module 201, for feedback data corresponding to output signal to be grouped to obtain according to phase
At least one set packet feedback data；
Correlation value calculation module 202, at least one set of feedback data that is grouped to be entered with the output signal respectively
Row correlation computations, correlation corresponding to every set of group related data is drawn respectively, will be maximum at least one correlation
It is worth the maximum related value as the output signal；
Judge module 203, for judging that the caching pre-set the whether maximum related value is more than in caching is related
Value, if it is, the caching correlation is updated into the maximum related value；
Output module 204, for exporting phase corresponding to the caching correlation.
Wherein, feedback data corresponding to the output signal meets：
The output signal is subjected to pre-distortion, the signal after pre-distortion is put by power amplifier
Feedback data corresponding to the output signal is obtained greatly.
The output signal is service signal, and/or, the output signal is cycle tests.
Visible by foregoing description, each phase of feedback data will carry out correlation computations, its phase with corresponding output signal
Closing property result will be compared with threshold value, and threshold value will be adaptively updated, and obtain optimum phase, each preferably to complete
Feed back related operation.
It should be noted that herein, such as first and second etc relational terms are used merely to an entity
Or operation makes a distinction with another entity or operation, and not necessarily require or imply and exist between these entities or operation
Any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant be intended to it is non-
It is exclusive to include, so that process, method, article or equipment including a series of elements not only include those key elements,
But also the other element including being not expressly set out, or also include solid by this process, method, article or equipment
Some key elements.In the absence of more restrictions, the key element limited by sentence " including one ", is not arranged
Except other identical factor in the process including the key element, method, article or equipment being also present.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above method embodiment can pass through
Programmed instruction related hardware is completed, and foregoing program can be stored in computer-readable storage medium, the program
Upon execution, the step of execution includes above method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or light
Disk etc. is various can be with the medium of store program codes.
It is last it should be noted that：Presently preferred embodiments of the present invention is the foregoing is only, is merely to illustrate the skill of the present invention
Art scheme, is not intended to limit the scope of the present invention.Any modification for being made within the spirit and principles of the invention,
Equivalent substitution, improvement etc., are all contained in protection scope of the present invention.
Claims (6)
1. a kind of power amplifier feedback signal optimum phase system of selection, it is characterised in that pre-set caching correlation, institute
The method of stating includes：
Feedback data corresponding to output signal is grouped to obtain at least one set of packet feedback data according to phase；
At least one set of packet feedback data is subjected to correlation computations with the output signal respectively, draws each component respectively
Correlation corresponding to group feedback data, using maximum in the correlation as the maximum related value of the output signal；
The caching the correlation whether maximum related value is more than in caching is judged, if it is, by the caching correlation more
It is newly the maximum related value；
Export phase corresponding to the caching correlation.
2. according to the method for claim 1, it is characterised in that it is described by feedback data corresponding to output signal according to phase
Before position is grouped to obtain at least one set of packet feedback data, further comprise：The output signal is carried out at predistortion
Reason, the signal after pre-distortion is amplified by power amplifier to obtain feedback data corresponding to the output signal.
3. according to the method for claim 1, it is characterised in that the output signal is service signal, and/or, it is described defeated
It is cycle tests to go out signal.
4. a kind of power amplifier feedback signal optimum phase selection device, it is characterised in that described device includes：
Feedback data packet module, for being grouped feedback data corresponding to output signal according to phase to obtain at least one set
It is grouped feedback data；
Correlation value calculation module, at least one set of packet feedback data to be carried out into correlometer with the output signal respectively
Calculate, correlation corresponding to every set of group related data is drawn respectively, using maximum at least one correlation as institute
State the maximum related value of output signal；
Judge module, the caching correlation pre-set whether being more than in caching for judging the maximum related value, if
It is that the caching correlation is then updated to the maximum related value；
Output module, for exporting phase corresponding to the caching correlation.
5. device according to claim 4, it is characterised in that feedback data corresponding to the output signal meets：
The output signal is subjected to pre-distortion, the signal after pre-distortion is amplified by power amplifier
To feedback data corresponding to the output signal.
6. device according to claim 4, it is characterised in that the output signal is service signal, and/or, it is described defeated
It is cycle tests to go out signal.
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| CN203086464U (en) * | 2013-01-21 | 2013-07-24 | 西安空间无线电技术研究所 | PN code rapid capture apparatus based on frequency domain |
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| US7646831B2 (en) * | 2001-10-19 | 2010-01-12 | Nokia Corporation | Method and a device for controlling data extraction from a data stream containing at lease one data packet |
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| CN102122956A (en) * | 2010-11-16 | 2011-07-13 | 钰创科技股份有限公司 | Phase selector, phase selecting method and clock pulse data recovery circuit |
| CN103036559A (en) * | 2011-09-28 | 2013-04-10 | 晨星软件研发(深圳)有限公司 | Phase locked loop and alignment method of relevant phase positions |
| CN203086464U (en) * | 2013-01-21 | 2013-07-24 | 西安空间无线电技术研究所 | PN code rapid capture apparatus based on frequency domain |
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