CN106487463B - MIMO signal testing result processing method and processing device - Google Patents
MIMO signal testing result processing method and processing device Download PDFInfo
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- CN106487463B CN106487463B CN201611073655.7A CN201611073655A CN106487463B CN 106487463 B CN106487463 B CN 106487463B CN 201611073655 A CN201611073655 A CN 201611073655A CN 106487463 B CN106487463 B CN 106487463B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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Abstract
The embodiment of the present invention provides a kind of MIMO signal testing result processing method and processing device, which comprises obtains the output signal that input signal to be detected obtains after the transmission of multiple-input and multiple-output mimo channel；Multiple estimated values of the input signal are determined according to the output signal；Accurate estimation is determined in the multiple estimated value according to preset algorithm；Export the accurate estimation.Using MIMO signal testing result processing method and processing device provided in an embodiment of the present invention, when determining the accurate estimation using the preset algorithm, the accurate estimation can directly be exported, without continuing to judge other estimated values, the expense of MIMO signal detection process is reduced, the computation complexity of MIMO signal detection method can be reduced.
Description
Technical field
The present invention relates to MIMO signal detection technique more particularly to a kind of MIMO signal detection knots
Fruit processing method and processing device.
Background technique
To by multiple-input and multiple-output (Multiple-Input Multiple-Output, abbreviation MIMO) transmission it
It is the essential function of multiaerial system receives link that signal afterwards, which is detected (referred to as MIMO detection), for true
Surely the estimated value of the input signal by mimo channel transmission.
In MIMO detection algorithm commonly used in the prior art, a big chunk algorithm is search type algorithm, working mechanism
It is the search space that a feasible solution is set in a manner of static or is dynamic, is found in the search space and receive signal Europe
Estimated value of the nearest feasible solution of formula distance as the MIMO input signal detected.Wherein feasible solution refers to
The possibility value of the estimated value for the input signal that MIMO is detected.
But finding a feasible solution nearest with receiving signal Euclidean distance in the prior art is with the side compared with traversal
Formula realize, that is, need to confirm all feasible solutions, finally search out with receive signal Euclidean distance recently one it is feasible
Solution makees the estimated value of the input signal.Existing this search type MIMO detection mode increases the complexity of detection system,
Reduce detection efficiency.
Summary of the invention
The present invention provides a kind of MIMO signal testing result processing method and processing device, for solving the prior art
In MIMO signal testing result processing method and processing device detection complexity it is high, the low technology of detection efficiency is asked
Topic.
In a first aspect, the embodiment of the present invention provides a kind of MIMO signal testing result processing method, comprising:
Obtain the output signal that input signal to be detected obtains after the transmission of multiple-input and multiple-output mimo channel；
Multiple estimated values of the input signal are determined according to the output signal；
Successively judge whether each estimated value is accurate estimation according to the preset algorithm；It is described correct obtaining
After estimated value, whether stopping uses the preset algorithm to judge remaining estimated value for accurate estimation；
Export the accurate estimation.
It is optionally, described successively to judge whether each estimated value is accurate estimation according to preset algorithm, comprising:
According to noise average power in the mimo channel transmission process of the output signal, the input signal and
The multiple estimated value judges whether each estimated value is accurate estimation.
Optionally, described according to the output signal, the input signal making an uproar in the mimo channel transmission process
Sound mean power and the multiple estimated value judge whether each estimated value is accurate estimation, comprising:
Using formulaEstimate described in judgement is each
EvaluationIt whether is accurate estimation, whereinFor classification function, for judging each estimated valueIt whether is correctly to estimate
Value, N0It is the mean power of noise w, n is mimo channel receiving end number of antennas.
Optionally, multiple estimated values that the input signal is determined according to the output signal, comprising:
Using preset search type algorithm, preset search space is determined；
According to the output signal, multiple estimated values of the input signal are determined in the preset search space.
Second aspect, the embodiment of the present invention also provide a kind of MIMO signal testing result processing unit, comprising:
Obtain module, for obtain input signal to be detected by multiple-input and multiple-output mimo channel transmission after obtain it is defeated
Signal out；
Determining module, for determining multiple estimated values of the input signal according to the output signal；
The determining module is also used to successively judge according to preset algorithm whether each estimated value is correctly to estimate
Value；And after obtaining the accurate estimation, whether stopping uses preset algorithm to judge remaining estimated value for accurate estimation；
Output module, for exporting the accurate estimation.
Optionally, the determining module, is specifically used for:
According to noise average power in the mimo channel transmission process of the output signal, the input signal and
The multiple estimated value judges whether each estimated value is accurate estimation.
Optionally, the determining module, is specifically used for:
Using formulaEstimate described in judgement is each
EvaluationIt whether is accurate estimation, whereinFor decision function, for judging each estimated valueIt whether is correctly to estimate
Value, N0It is the mean power of noise w, n is mimo channel receiving end number of antennas.
Optionally, the determining module, is specifically used for:
Using preset search type algorithm, preset search space is determined；
According to the output signal, multiple estimated values of the input signal are determined in the preset search space.
Multi output signal detecting result processing method and processing device of the embodiment of the present invention is passed through by obtaining input signal to be detected
Cross the output signal obtained after the transmission of multiple-input and multiple-output mimo channel；The input signal is determined according to the output signal
Multiple estimated values；Successively judge whether each estimated value is accurate estimation according to preset algorithm；And it is described just in acquisition
After true estimated value, whether stopping uses the preset algorithm to judge remaining estimated value for accurate estimation.Implemented using the present invention
The multi output signal detecting result processing method and processing device that example provides, when the use preset algorithm determines the correct estimation
When value, the accurate estimation can be directly exported, other estimated values are judged without continuing, reduces search type MIMO
The expense of signal detection process may finally reduce the computation complexity of described search type MIMO signal detection method.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the flow diagram of MIMO signal of embodiment of the present invention testing result processing method；
Fig. 2 is the estimated value that MIMO signal of embodiment of the present invention testing result processing method determines input signal
Process schematic；
Fig. 3 is the structural schematic diagram of MIMO signal of embodiment of the present invention testing result processing unit.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of MIMO signal testing result processing method and processing device, for be checked
Input signal is surveyed after the transmission of multiple-input and multiple-output mimo channel, it is true using search type MIMO detection algorithm in signal receiving end
During the estimated value of the fixed input signal, the detection complexity of search type MIMO detection algorithm is reduced, promotes detection effect
Rate.
Fig. 1 is the flow diagram of MIMO signal of embodiment of the present invention testing result processing method.
Referring to Fig. 1, MIMO signal testing result processing method of the embodiment of the present invention includes:
S101: the output signal that input signal to be detected obtains after the transmission of multiple-input and multiple-output mimo channel is obtained；
S102: multiple estimated values of the input signal are determined according to the output signal；
Specifically, multiple estimated values that the input signal is determined according to the output signal, comprising:
Using preset search type algorithm, preset search space is determined；
According to the output signal, multiple estimated values of the input signal are determined in the preset search space.
Specifically, the mimo channel model can indicate are as follows: y=Hx+w, wherein x is input signal, and H is MIMO letter
Road matrix, w are the additive noises in channel, and y is then output signal.The MIMO detection refers in known mimo channel matrix H
Under conditions of output signal y, the accurate estimation of input signal x is obtainedSignal processing.Described search type algorithm,
(semi-relaxation detector, abbreviation SRD) algorithm and K shortest path (k- can be detected for Sphere Decoding, semidefinite decoding
Shortest paths, abbreviation KSP) algorithm.
S103: successively judge whether each estimated value is accurate estimation according to preset algorithm；It is described just in acquisition
After true estimated value, whether stopping uses the preset algorithm to judge remaining estimated value for accurate estimation.
It is described successively to judge whether each estimated value is accurate estimation according to preset algorithm, comprising:
According to noise average power in the mimo channel transmission process of the output signal, the input signal and
The multiple estimated value judges whether each estimated value is accurate estimation.
The noise according to the output signal, the input signal in the mimo channel transmission process is averaged function
Rate and the multiple estimated value judge whether each estimated value is accurate estimation, comprising:
Using formulaEstimate described in judgement is each
EvaluationIt whether is accurate estimation, whereinFor decision function, for judging each estimated valueIt whether is correctly to estimate
Value, N0It is the mean power of noise w, n is mimo channel receiving end number of antennas.
Wherein, N0It can count to obtain by passing through long-term observation in systems in practice.When the output signal, described defeated
Enter any one estimated value of signalNoise average power N0And the relationship between mimo channel matrix H meets the decision letter
NumberIt takes when correctly solving corresponding establishment condition, then described search type MIMO detection algorithm can terminate, by current estimation
ValueAccurate estimation as the input signalIn actual use, numerically micro- can be to above-mentioned decision strategy
It adjusts, for example, to N0ln(1/N0) and 1-lnN0Carry out constant times scaling.
Due to decision functionIntroducing so that MIMO detection algorithm only need search out one meet condition can
Termination algorithm can be shifted to an earlier date when row solution immediately, be not the feasible solution for excluding to become final result in a manner of exclusive method
And the search space of reduction is obtained, without in search space signal Euclidean distance is searched out and received by traversing relatively
The final solving result that a nearest feasible solution is detected as MIMO.
Fig. 2 is the estimated value that MIMO signal of embodiment of the present invention testing result processing method determines input signal
Process schematic.
Specifically, referring to Fig. 2, by taking Sphere Decoding as an example, it is assumed that the inspection policies of Sphere Decoding MIMO detection algorithm itself are determined
Determined be to the search process of the estimated value of the input signal: from root node 1 to node 2 to node 5 to leaf node 11 to
Node 3 is to node 7 to leaf node 14 finally to leaf node 15.It is detected using MIMO signal of the embodiment of the present invention
When result processing method carries out MIMO detection, described search type algorithm is according to inspection policies in search to leaf node 11, leaf
The decision function is called when node 14 or leaf node 15 respectivelyTo judge whether leaf node 11,14 and 15 can mention
Preceding termination detection, if then exiting algorithm at once.For example, being determined that when described search type algorithm search is to leaf node 11
The estimated value of the input signal arrived is accurate estimation, then the search after the leaf node 11 just no longer needs to execute,
Directly using the corresponding solution of the leaf node 11 as the accurate estimation of the input signal, to greatly reduce search type
The expense of MIMO signal detection process may finally reduce the computation complexity of described search type MIMO signal detection method.
S104: the accurate estimation is exported.
Multi output signal detecting result processing method provided in an embodiment of the present invention is passed through by obtaining input signal to be detected
Cross the output signal obtained after the transmission of multiple-input and multiple-output mimo channel；The input signal is determined according to the output signal
Multiple estimated values；Successively judge whether each estimated value is accurate estimation according to preset algorithm；And it is described just in acquisition
After true estimated value, whether stopping uses the preset algorithm to judge remaining estimated value for accurate estimation.Implemented using the present invention
The multi output signal detecting result processing method that example provides, when determining the accurate estimation using the preset algorithm,
The accurate estimation can be directly exported, other estimated values are judged without continuing, reduces search type MIMO signal
The expense of detection process may finally reduce the computation complexity of described search type MIMO signal detection method.
Fig. 3 is the structural schematic diagram of MIMO signal of embodiment of the present invention testing result processing unit.
Referring to Fig. 3, MIMO signal testing result processing unit of the embodiment of the present invention includes:
Module 310 is obtained, is obtained after the transmission of multiple-input and multiple-output mimo channel for obtaining input signal to be detected
Output signal；
Determining module 320, for determining multiple estimated values of the input signal according to the output signal；
The determining module 320 is also used to successively judge according to preset algorithm whether each estimated value is correctly to estimate
Evaluation；And after obtaining the accurate estimation, whether stopping uses preset algorithm to judge remaining estimated value for accurate estimation.
Output module 330, for exporting the accurate estimation.
Further, the determining module 320, is specifically used for:
According to noise average power in the mimo channel transmission process of the output signal, the input signal and
The multiple estimated value judges whether each estimated value is accurate estimation.
Further, the determining module 320, is specifically used for:
Using formulaEstimate described in judgement is each
EvaluationIt whether is accurate estimation, whereinFor classification function, for judging each estimated valueIt whether is correctly to estimate
Value, N0It is the mean power of noise w, n is mimo channel receiving end number of antennas.
Further, the determining module 320, is specifically used for:
Using preset search type algorithm, preset search space is determined；
According to the output signal, multiple estimated values of the input signal are determined in the preset search space.
MIMO signal testing result processing unit of the embodiment of the present invention is mentioned for executing above method embodiment
The MIMO signal testing result processing method of confession, implements principle and technical effect is similar with embodiment of the method,
Details are not described herein.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned include: ROM, RAM, magnetic disk or
The various media that can store program code such as person's CD.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (4)
1. a kind of MIMO signal testing result processing method characterized by comprising
Obtain the output signal that input signal to be detected obtains after the transmission of multiple-input and multiple-output mimo channel；
Multiple estimated values of the input signal are determined according to the output signal；
Successively judge whether each estimated value is accurate estimation according to preset algorithm；Obtaining the accurate estimation
Afterwards, stop that the preset algorithm is used to judge remaining estimated value whether for accurate estimation；
Export the accurate estimation；
It is described successively to judge whether each estimated value is accurate estimation according to preset algorithm, comprising:
According to noise average power in the mimo channel transmission process of the output signal, the input signal and described
Multiple estimated values judge whether each estimated value is accurate estimation；
The noise average power according to the output signal, the input signal in the mimo channel transmission process and
The multiple estimated value judges whether each estimated value is accurate estimation, comprising:
Using formulaJudge each estimated valueIt whether is accurate estimation, whereinFor classification function, for judging each estimated valueIt whether is accurate estimation, N0
It is the mean power of noise w, n is mimo channel receiving end number of antennas, and the y is the output signal, and the H is described
The matrix of mimo channel.
2. the method according to claim 1, wherein described determine the input signal according to the output signal
Multiple estimated values, comprising:
Using preset search type algorithm, preset search space is determined；
According to the output signal, multiple estimated values of the input signal are determined in the preset search space.
3. a kind of MIMO signal testing result processing unit characterized by comprising
Module is obtained, the output letter obtained after the transmission of multiple-input and multiple-output mimo channel for obtaining input signal to be detected
Number；
Determining module, for determining multiple estimated values of the input signal according to the output signal；
The determining module is also used to successively judge whether each estimated value is accurate estimation according to preset algorithm；And
After obtaining the accurate estimation, whether stopping uses preset algorithm to judge remaining estimated value for accurate estimation；
Output module, for exporting the accurate estimation；
The determining module, is specifically used for:
According to noise average power in the mimo channel transmission process of the output signal, the input signal and described
Multiple estimated values judge whether each estimated value is accurate estimation；
The determining module, is specifically used for:
Using formulaJudge each estimated valueIt whether is accurate estimation, whereinFor decision function, for judging each estimated valueIt whether is accurate estimation, N0
It is the mean power of noise w, n is mimo channel receiving end number of antennas, and the y is the output signal, and the H is described
The matrix of mimo channel.
4. device according to claim 3, which is characterized in that the determining module is specifically used for:
Using preset search type algorithm, preset search space is determined；
According to the output signal, multiple estimated values of the input signal are determined in the preset search space.
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| CN103595664A (en) * | 2012-08-17 | 2014-02-19 | 中兴通讯股份有限公司 | Channel estimation method and device in multiple-receiving antenna system |
| CN104980202A (en) * | 2015-06-12 | 2015-10-14 | 电子科技大学 | Uplink detection method based on MCMC technology in large-scale MIMO system |
| WO2016010291A1 (en) * | 2014-07-15 | 2016-01-21 | 엘지전자 주식회사 | Method by which mimo receiver processes reception signal by aligning plurality of layers by re group unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101383652A (en) * | 2007-09-04 | 2009-03-11 | 中兴通讯股份有限公司 | Signal detection method and apparatus for MIMO system |
| CN103595664A (en) * | 2012-08-17 | 2014-02-19 | 中兴通讯股份有限公司 | Channel estimation method and device in multiple-receiving antenna system |
| WO2016010291A1 (en) * | 2014-07-15 | 2016-01-21 | 엘지전자 주식회사 | Method by which mimo receiver processes reception signal by aligning plurality of layers by re group unit |
| CN104980202A (en) * | 2015-06-12 | 2015-10-14 | 电子科技大学 | Uplink detection method based on MCMC technology in large-scale MIMO system |
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