CN106788654A - MIMO signal testing result sorting technique and device - Google Patents
MIMO signal testing result sorting technique and device Download PDFInfo
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- CN106788654A CN106788654A CN201611073776.1A CN201611073776A CN106788654A CN 106788654 A CN106788654 A CN 106788654A CN 201611073776 A CN201611073776 A CN 201611073776A CN 106788654 A CN106788654 A CN 106788654A
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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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- 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
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
-
- 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
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
- H04B7/0854—Joint weighting using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion
Abstract
The embodiment of the present invention provides a kind of MIMO signal testing result sorting technique and device, and methods described includes：The reception signal that sending signal is obtained after multiple-input and multiple-output mimo channel is transmitted, and the estimate of the sending signal is determined according to the reception signal；According to the estimate of the noise average power and the sending signal of the reception signal, the sending signal in the mimo channel transmitting procedure, determine that the estimate of the sending signal is excellent solution or bad difference solution.Using MIMO signal testing result sorting technique provided in an embodiment of the present invention and device, after the estimate for determining sending signal, estimate to the sending signal carries out classification judgement, such that it is able to take different treatment strategies according to classification results, while MIMO detections are carried out using the relatively low detection algorithm of computation complexity as far as possible, it is ensured that detection performance.
Description
Technical field
The present invention relates to MIMO signal detection technique, more particularly to a kind of MIMO signal detection knot
Fruit sorting technique and device.
Background technology
To by multiple-input and multiple-output (Multiple-Input Multiple-Output, abbreviation MIMO) transmission it
Signal afterwards is detected that (referred to as MIMO detections) is an essential function of multiaerial system receives link, for true
The estimate of the fixed sending signal transmitted by the mimo channel.
The emphasis of MIMO detections research concern is generally placed upon lifting detection performance and reduces the complexity of algorithm in the prior art
Degree.Improving performance means MIMO detection algorithms to be retained as far as possible or fully excavates what mimo system itself can be provided
Various gains.Meanwhile, in practical application, due to hardware processing capability (such as, the processing speed of digital signal processing chip)
Limitation, it is desirable to the complexity of algorithm it is more low better or sufficiently low and can be by hardware supported.But, using algorithm complex
During low MIMO detection algorithms, it is possible to obtain testing result it is not accurate enough, so as to influence to detect performance.
The content of the invention
The embodiment of the present invention provides a kind of MIMO signal testing result sorting technique and device, in MIMO
According to the classification of testing result in detection, using corresponding inspection policies, the complexity of detection algorithm is reduced, while ensureing detection
Performance.
In a first aspect, the embodiment of the present invention provides a kind of MIMO signal testing result sorting technique, including：
Sending signal to be detected is obtained by the reception signal that obtains after the transmission of multiple-input and multiple-output mimo channel, and according to
It is described to receive the estimate that signal determines the sending signal；
According to the noise average power in the mimo channel transmitting procedure of reception signal, the sending signal and
The estimate of the sending signal, determines that the estimate of the sending signal is excellent solution or bad difference solution.
Alternatively, it is described according to the reception signal, the sending signal making an uproar in the mimo channel transmitting procedure
The estimate of sound mean power and the sending signal, determines that the estimate of the sending signal is that excellent solution or bad difference are solved,
Including：
Using formulaDetermine that described transmission is believed
Number estimate whether be excellent solution, wherein,The estimate of the sending signal is represented,It is classification function, for sentencing
The estimate of the sending signal of breakingWhether it is excellent solution, N0It is the mean power of noise w, n is mimo channel receiving terminal antenna
Number.
Alternatively, the estimate that the sending signal is determined according to the reception signal, including：
The estimate of the sending signal is determined using first order detection algorithm；
Methods described also includes：
Determine that the estimate of the sending signal is excellent solution according to the first order detection algorithm, then export described
Excellent solution.
Alternatively, the first order detection algorithm is squeeze theorem algorithm, or, minimum mean-squared error algorithm algorithm.
Alternatively, methods described also includes：
The estimate that the sending signal is determined according to the first order detection algorithm is bad difference solution, then using second
Level detection algorithm determines the new estimation value of the sending signal.
Alternatively, the second level detection algorithm is maximum likelihood algorithm.
Second aspect, the embodiment of the present invention provides a kind of MIMO signal testing result sorter, including：
Acquisition module, for obtaining sending signal to be detected by connecing for being obtained after the transmission of multiple-input and multiple-output mimo channel
The collection of letters number, and the estimate of the sending signal is determined according to the reception signal；
Determining module, for according to the reception signal, the sending signal is in the mimo channel transmitting procedure
The estimate of noise average power and the sending signal, determines that the estimate of the sending signal is excellent solution or bad difference solution.
Alternatively, the determining module, specifically for：
Using formulaDetermine that described transmission is believed
Number estimate whether be correct solution, wherein,Be classification function, for judge it is any toWhether it is correct solution, N0It is
The mean power of noise w, n is mimo channel receiving terminal number of antennas.
Alternatively, the determining module, specifically for：
The estimate of the sending signal is determined using first order detection algorithm；
Described device also includes：
Output module, for determining the sending signal using the first order detection algorithm in the determining module
When estimate is excellent solution, the excellent solution is exported.
Alternatively, the determining module is additionally operable to：
When using the first order detection algorithm to determine the estimate of the sending signal for bad difference solution, using second
Level detection algorithm determines the new estimation value of the sending signal.
MIMO signal testing result sorting technique provided in an embodiment of the present invention and device, it is to be checked by obtaining
Sending signal is surveyed by the reception signal obtained after the transmission of multiple-input and multiple-output mimo channel, institute is determined according to the reception signal
State the estimate of sending signal；According to the reception signal, the sending signal making an uproar in the mimo channel transmitting procedure
The estimate of sound mean power and the sending signal, determines that the estimate of the sending signal is excellent solution or bad difference solution.Adopt
With MIMO signal testing result sorting technique provided in an embodiment of the present invention and device, sending signal is being determined
After estimate, the estimate to the sending signal carries out classification judgement, such that it is able to take different according to classification results
MIMO inspection policies, while MIMO detections are carried out using the relatively low detection algorithm of computation complexity as far as possible, it is ensured that detection property
Energy.
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
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of embodiment of the present invention MIMO signal testing result sorting technique；
Fig. 2 is the application flow schematic diagram of embodiment of the present invention MIMO signal testing result sorting technique；
Fig. 3 is the application process schematic diagram of embodiment of the present invention MIMO signal testing result sorting technique；
Fig. 4 is the structural representation of embodiment of the present invention MIMO signal testing result sorter.
Specific 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
A part of 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 under the premise of creative work is not made, belongs to the scope of protection of the invention.
The embodiment of the present invention provides a kind of MIMO signal testing result sorting technique and device, in signal
Receiving terminal is sentenced when MIMO detection algorithms detection of transmitted signals is by the estimate after the transmission of multiple-input and multiple-output mimo channel
The detection accuracy of disconnected transmitting signal estimated value, inspection policies are adjusted according to detection accuracy, such that it is able to as far as possible using meter
While the relatively low detection algorithm of calculation complexity carries out MIMO detections, it is ensured that detection performance.
Fig. 1 is the schematic flow sheet of embodiment of the present invention MIMO signal testing result sorting technique.
MIMO signal testing result sorting technique provided in an embodiment of the present invention, including：
S101：The reception signal that sending signal to be detected is obtained after multiple-input and multiple-output mimo channel is transmitted is obtained,
And the estimate of the sending signal is determined according to the reception signal；
Specifically, the mimo channel model can be expressed as：Y=Hx+w, wherein, x is sending signal, and H is MIMO letters
Road matrix, w is the additive noise in channel, and y is then to receive signal.The MIMO detections refer in known mimo channel matrix H
Under conditions of sending signal y, the signal processing of the accurate estimation x of sending signal x is obtained.
S102：It is average according to the noise of the reception signal, the sending signal in the mimo channel transmitting procedure
The estimate of power and the sending signal, determines that the estimate of the sending signal is correct solution.
Specifically, it is described according to the reception signal, the sending signal making an uproar in the mimo channel transmitting procedure
The estimate of sound mean power and the sending signal, determines that the estimate of the sending signal is correct solution, including：
Using formulaDetermine that described transmission is believed
Number estimate whether be excellent solution, wherein,The estimate of the sending signal is represented,It is classification function, for sentencing
The estimate of the sending signal of breakingWhether it is excellent solution, N0It is the mean power of noise w, n is mimo channel receiving terminal antenna
Number.
Fig. 2 is the application flow schematic diagram of embodiment of the present invention MIMO signal testing result sorting technique.
Refer to Fig. 2, the estimate that the sending signal is determined according to the reception signal, including：
The estimate of the sending signal is determined using first order detection algorithm.
Methods described also includes：
Determine that the estimate of the sending signal is excellent solution according to the first order detection algorithm, then export described
Excellent solution.
Wherein, the first order detection algorithm can be ZF (Zero Forcing, abbreviation ZF) detection algorithm, or,
Least mean-square error (Minimum Mean Square Error, abbreviation MMSE) detection algorithm.
Further, in order to ensure the detection accuracy of the MIMO signal testing result sorting technique,
On the basis of above-described embodiment, methods described also includes：
The estimate that the sending signal is determined according to the first order detection algorithm is bad difference solution, then using second
Level detection algorithm determines the new estimation value of the sending signal.
Specifically, the second level detection algorithm can be examined for maximum likelihood (maximum-likelihood, ML) algorithm
Survey.
In order to ensure that the MIMO detection process has relatively low computation complexity while taking into account detection accuracy, described first
Level detection algorithm can be to detect the poor-performing still relatively low algorithm of computation complexity, and the second level detection algorithm can be
Computation complexity is higher, but the algorithm of detection better performances.It will be understood to those skilled in the art that above-mentioned for the first order
Detection algorithm and it is described second detection level algorithm citing be not construed as limiting the invention, the first order detection algorithm and
The second detection level algorithm can also be other similar algorithms.
Specifically, operationally, first order detection algorithm carries out MIMO detections to above-mentioned two-stage MIMO detection algorithms first, so
The input signal estimate that the first order detection algorithm is obtained is differentiated by the preset algorithm afterwards.If described first
The transmitting signal estimated value that level detection algorithm is tried to achieve is excellent solution, then the second level detection algorithm need not be performed, directly by institute
Input signal estimate that first order detection algorithm obtains is stated as output；If the transmission letter that the first order detection algorithm is obtained
Number estimate is bad difference solution, then need to perform the second level detection algorithm and try to achieve more preferable transmitting signal estimated value.In reality
In implementation procedure, the second level detection algorithm is not that can be called every time, and can only be performed under certain conditions.Cause
This, the MIMO signal testing result sorting technique can be reduced on the premise of good detection performance is kept
The complexity of MIMO detections.
In Rayleigh fading MIMO systems, above-mentioned two-stage MIMO detection algorithms have full marks intensity, wherein full diversity
Degree represents the optimal detection performance under the conditions of high s/n ratio.
The MIMO signal testing result sorting technique provided using the embodiment of the present invention, can be to any
The solving result of MIMO detection algorithms carries out good and bad classification, is that the follow-up processing module of receives link (such as, channel decoding) is carried
For a kind of configured information of data reliability.Solved when receives link is transmitted signal estimate according to MIMO detection algorithms
Afterwards, the MIMO signal testing result sorting technique for being provided according to embodiments of the present invention is estimated the sending signal
Value carries out superiority-inferiority sorting technique discriminating, and so as to know MIMO detections output data, which is that excellent solution (has probability very high
It is correct), which is then bad difference solution.Then subsequent treatment module (such as, channel decoding) can just use more computing resources
Enter row decoding in corresponding data are solved to bad difference.Because bad difference solution is it is more likely that wrong data is, it is necessary in channel decoding treatment
By error-detection error-correction, and the corresponding data of excellent solution are then correct because of there is very maximum probability, and channel decoding does not need overspending
Computing resource carry out data error detection error correction.Which achieves the computing resource distribution according to need at channel decoding, keeping counting
On the premise of calculation resource overhead is constant, more resources are used to carry out error-detection error-correction to the data for more likely malfunctioning, so as to carry
Channel decoding performance is risen, the whole detection-decoding performance of receives link is also just improved.
Fig. 3 is the application process schematic diagram of embodiment of the present invention MIMO signal testing result sorting technique.
Fig. 3 is referred to, in actual applications, it is possible to use the MIMO signal inspection that the embodiment of the present invention is provided
Results sorting method is surveyed, a kind of error in data to communication link receiving terminal Digital Signal Processing is designed and is tracked and recalls
Method.The method of this wrong data tracking and backtracking can assist system research and development personnel positioning number in the system research and development debugging stage
Occur in MIMO detection-phases or channel decoding stage according to mistake, and system maintenance personnel are real-time when communication link is safeguarded
Follow the trail of link abnormal conditions.The current demand of error in data tracking and backtracking, can be construed in practical communication system：With
(that is, 2G/3G/4G systems), the data of receives link in communication link as a example by two generations, the third generation and forth generation GSM
Treatment needs just know receiving area in CRC (Cyclic Redundancy Check, the abbreviation CRC check) stage
Whether reason there occurs error in data (that is, CRC check failure occur).CRC check is always arranged on receives link signal transacting
Least significant end, it is as shown below, once occur CRC check failure, not can know which data (bit) there occurs substantially
Mistake, can not know that receives link is difficult in which of receives link there occurs mistake, therefore existing system in stage
Wrong data is tracked and recalled.The MIMO signal testing result sorting technique provided using the embodiment of the present invention can
Superiority-inferiority classification is carried out with for MIMO detections output data, good solution, bad difference solution is distinguished, wherein bad poor solution is easily error
Data, can begin to track the data of easy error after MIMO detection algorithms, so as to assist research staff to mistake
Data are positioned.
Fig. 4 is the structural representation of embodiment of the present invention MIMO signal testing result sorter.
Fig. 4 is referred to, the MIMO signal testing result sorter that the embodiment of the present invention is provided, including：
Acquisition module 410, obtains for obtaining sending signal to be detected by after the transmission of multiple-input and multiple-output mimo channel
Reception signal, and the estimate of the sending signal is determined according to the reception signal；
Determining module, for according to the reception signal, the sending signal is in the mimo channel transmitting procedure
The estimate of noise average power and the sending signal, determines that the estimate of the sending signal is excellent solution or bad difference solution.
Alternatively, the determining module 420, specifically for：
Using formula
Whether the estimate for determining the sending signal is correct solution, wherein,It is classification function, it is any for judging
GivenWhether it is correct solution, N0It is the mean power of noise w, n is mimo channel receiving terminal number of antennas.Alternatively, it is described true
Cover half block 420, specifically for：
The estimate of the sending signal is determined using first order detection algorithm；
Described device also includes：
Output module 430, for determining that described transmission is believed using the first order detection algorithm in the determining module
Number estimate when being excellent solution, export the excellent solution.
Alternatively, the determining module 420 is additionally operable to：
When using the first order detection algorithm to determine the estimate of the sending signal for bad difference solution, using second
Level detection algorithm determines the new estimation value of the sending signal.
Embodiment of the present invention MIMO signal testing result sorter is carried for performing above method embodiment
The MIMO signal testing result sorting technique of confession, implements principle and technique effect is similar with embodiment of the method,
Will not be repeated here.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
The related hardware of programmed instruction is crossed to complete.Foregoing program can be stored in a computer read/write memory medium.The journey
Sequence upon execution, performs the step of including above-mentioned each method embodiment；And foregoing storage medium includes：ROM, RAM, magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of MIMO signal testing result sorting technique, it is characterised in that including：
The reception signal that sending signal to be detected is obtained after multiple-input and multiple-output mimo channel is transmitted is obtained, and according to described
Receive the estimate that signal determines the sending signal；
According to the noise average power in the mimo channel transmitting procedure of reception signal, the sending signal and described
The estimate of sending signal, determines that the estimate of the sending signal is excellent solution or bad difference solution.
2. method according to claim 1, it is characterised in that described to be existed according to the reception signal, the sending signal
The estimate of noise average power and the sending signal in the mimo channel transmitting procedure, determines the sending signal
Estimate is that excellent solution or bad difference are solved, including：
Using formulaDetermine the sending signal
Whether estimate is excellent solution, wherein,The detected value of the sending signal is represented,It is classification function, for judging
State the estimate of sending signalWhether it is excellent solution, N0It is the mean power of noise w, n is mimo channel receiving terminal antenna number
Mesh.
3. method according to claim 1 and 2, it is characterised in that described that the transmission is determined according to the reception signal
The estimate of signal, including：
The estimate of the sending signal is determined using first order detection algorithm；
Methods described also includes：
The estimate that the sending signal is determined according to the first order detection algorithm is excellent solution, then export described excellent
Solution.
4. method according to claim 3, it is characterised in that the first order detection algorithm is squeeze theorem algorithm, or
Person, minimum mean-squared error algorithm algorithm.
5. method according to claim 3, it is characterised in that methods described also includes：
The estimate that the sending signal is determined according to the first order detection algorithm is bad difference solution, then examined using the second level
Method of determining and calculating determines the new estimation value of the sending signal.
6. method according to claim 5, it is characterised in that the second level detection algorithm is maximum likelihood algorithm.
7. a kind of MIMO signal testing result sorter, it is characterised in that including：
Acquisition module, believes for obtaining sending signal to be detected by the reception obtained after the transmission of multiple-input and multiple-output mimo channel
Number, and the estimate of the sending signal is determined according to the reception signal；
Determining module, for the noise according to the reception signal, the sending signal in the mimo channel transmitting procedure
The estimate of mean power and the sending signal, determines that the estimate of the sending signal is excellent solution or bad difference solution.
8. device according to claim 7, it is characterised in that the determining module, specifically for：
Using formulaDetermine the sending signal
Whether estimate is correct solution, wherein,Be classification function, for judge it is any toWhether it is correct solution, N0It is noise
The mean power of w, n is mimo channel receiving terminal number of antennas.
9. the device according to claim 7 or 8, it is characterised in that the determining module, specifically for：
The estimate of the sending signal is determined using first order detection algorithm；
Described device also includes：
Output module, the estimation for determining the sending signal using the first order detection algorithm in the determining module
It is worth during for excellent solution, exports the excellent solution.
10. device according to claim 9, it is characterised in that the determining module is additionally operable to：
When using the first order detection algorithm to determine the estimate of the sending signal for bad difference solution, examined using the second level
Method of determining and calculating determines the new estimation value of the sending signal.
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