CN104301267B - The multistage iteration detection method and device of a kind of mimo wireless communication receiver - Google Patents
The multistage iteration detection method and device of a kind of mimo wireless communication receiver Download PDFInfo
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Abstract
The invention discloses the multistage iteration detection method and device of a kind of mimo wireless communication receiver, multiple detection-phases are set, detection is iterated stage by stage, and each detection-phase only detects layer of the current detection stage reliability more than pre-determined threshold, and wherein methods described includes step：The docking collection of letters number carries out pre-treatment, and signal is initially received to generate the first detection-phase；Signal is initially received to the first detection-phase carries out many wheel iterative detections, to generate the first detection-phase decision signal, then by subsequent processing steps, signal is initially received to generate the second detection-phase；Detected according to default detection-phase number to all layers, to generate conclusive judgement signal.The present invention on the premise of less complexity and amount of calculation is increased, makes the performance of mimo wireless communication receiver get a promotion by the further improvement to existing iteration detection method, particularly effectively improves the performance of mimo wireless communication receiver under high order modulation.
Description
Technical field
The present invention relates to communication field, more particularly to a kind of multistage iteration detection method of mimo wireless communication receiver
And device.
Background technology
Multiple-input and multiple-output (MIMO, Multiple-Input Multiple-Output) technology utilizes the nothing of rich multipath
In line communication environments between different antennae channel gain uncorrelated characteristic, obtain high channel capacity, so as to improve whole system
The availability of frequency spectrum and reliability.
Receiver is the chief component of mimo system, is also the bottleneck of whole system performance and complexity.Therefore,
The detection method of the high-performance low-complexity of mimo wireless communication receiver is always the focus of research, including proposed in recent years
It is applied to the low-complexity detection method in extensive MIMO (Large MIMO, Massive MIMO) system.
First, simply easily realized using the mimo wireless communication receiver structure of linear equalization mode, but its poor-performing.
Wherein, common linear equalization mode includes that ZF (ZF, Zero Forcing) is balanced and least mean-square error (MMSE,
Minimum Mean Square Error) equilibrium etc..
Secondly, based on order interference eliminate (SIC, Successive Inference Cancellation) MIMO without
Line communication control processor, as a result of good interference mitigation technology so that the interference of different interlayers mitigates significantly, and performance is general
It is significantly better than the mimo wireless communication receiver for being based only upon linear equalization.But because complexity is too high and to channel measurement error
Sensitiveness, do not received extensively by industrial quarters still so far.
However, iteration detection method can keep the advantage that mimo wireless communication receiver structure is simply easily realized, and energy
It is obviously improved receiver performance.Effective iteration detection method has, Chinese invention patent (number of patent application：
2010105543129) a kind of Turbo Enhancement Methods of the mimo wireless communication receiver for proposing (are also called IIC, Iterative
Interference Cancellation), and suitable for LAS (the Likelihood Ascend of Large MIMO
Search), RTS (Reactive Tabu Search) etc..
It should be noted that：
Detection refers to be carried in the baseband signal containing interference noise after the treatment such as radio frequency, intermediate frequency demodulation from received
Take the process of useful information symbol or information bit；
Equilibrium refers to that the balanced device of the equilibrium to the characteristic of channel, i.e. receiving terminal produces the characteristic opposite with channel, can be disappeared
Except or partially remove influence of the channel to signal；
Reconstruct refers to the process of that reception signal reproduction corresponding to transmission signal obtains reconstruction signal, including corresponding with originator
Constellation point process and with channel estimate matrix multiplication processes；
Judgement refers to that the modulation system used according to transmitting terminal judges transmitted information bit or information symbol
Process；
Part judgement refers to according to Chinese invention patent (number of patent application：201210140037.5) the part judgement for proposing
The process that method quantifies to decision statistics.
In MIMO communication system, traditionally introduce layer concept, correspondence send each road independence data flow, for example by
I-th data flow i-th layer of symbol of correspondence of transmitting antenna transmitting.Each transmitting antenna is in one symbol of each slot transmission
Number, it is a layer symbol.
In mimo wireless communication system, in order to improve the spectrum efficiency of system, generally using ary modulation high.Wherein,
Typical ary modulation high is including 16QAM (Quadrature Amplitude Modulation), 64QAM etc..
But, performance of the detection method of existing mimo wireless communication receiver under ary modulation high need at present
In further improvement.
It is more sensitive to the extra reception diversity of system in view of its performance of iteration detection method, that is to say, that in NT＜ NR
In the case of the detection performance of mimo system to be substantially better than NT=NRSituation, wherein, NTAnd NRRespectively transmitting antenna number and
Reception antenna number.The present invention is it has been investigated that one kind is being not limited to existing NT＜ NREffectively utilized in the case of system and additionally connect
The method of contracture collection.
The content of the invention
The purpose of the present invention is exactly to solve the above problems, there is provided a kind of multistage of mimo wireless communication receiver
Iteration detection method and device, it has on the premise of less complexity and amount of calculation is increased, and receives mimo wireless communication
The advantage that the performance of machine gets a promotion.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of multistage iteration detection method of mimo wireless communication receiver, comprises the following steps：
Step R11：Reception signal to mimo wireless communication receiver is processed, and is obtained the initial of the first detection-phase and is connect
The collection of letters number；
The treatment includes down coversion, analog-to-digital conversion, synchronization, channel estimation and equilibrium,
The equilibrium allows to be ZF balanced, MMSE equilibriums and other any feasible equalization methods；
Step R12：Initial reception signal to first detection-phase of the step R11 carries out multistage iterative detection,
Obtain corresponding conclusive judgement signal；
Step R13：Conclusive judgement signal to being obtained through multistage iterative detection makes decisions；
Step R14：Signal after output judgement, that is, export final detection result.
Carrying out multistage iterative detection in the step R12 is：Multiple detection-phases are set, inspection is iterated stage by stage
Survey：
Wherein, in the first detection-phase, only detect that reliability is higher than 1- α1Corresponding N1Layer, you can by property more than default
Thresholding 1- α1Layer, wherein, 1- α1It is first stage predetermined threshold value；
It should be noted that the quadrature component and in-phase component of and if only if decision statistics are satisfied by reliability higher than 1-
α1When, the reliability for just claiming corresponding layer is higher than 1- α1, i.e. this layer is layer of the reliability more than pre-determined threshold；
, it is necessary to channel matrix to be corresponded to the N of the first detection-phase detection before the second detection-phase is carried out1The row of layer
Zero is set to, and the N that the first detection-phase is detected1After the corresponding judgement output signal reconstruct of layer, as interference from the first detection
Eliminated in the initial reception signal in stage, obtain the initial reception signal of the second detection-phase；So as to by former NT×NRMIMO systems
System is equivalent to (a NT-N1)×NRMimo system；
In the second detection-phase, by former NT×NRMimo system be equivalent to (a NT-N1)×NRMimo system after, press
The method same with the first detection-phase detects that reliability is higher than predetermined threshold value 1- α2Corresponding N2Layer.Wherein, NTAnd NRPoint
Wei not transmitting antenna number and reception antenna number, N1It is the number of the layer of the first detection-phase detection, α2For the second detection-phase is default
Threshold value；
It is intended to do a upper detection-phase foregoing to the first detection-phase identical in m-th detection-phase, before detection
Treatment so that the system in current detection stage is equivalent to [a NT-(N1+…+Nm-1)]×NRSystem, effectively utilize system
Extra reception diversity.Wherein, m=1,2 ..., M, M are default detection-phase number；
The N that M-1 detection-phase is not detected before last m-th detection-phase detectionT-(N1+…+NM-1) layer, that is, work as NTLayer
It is detected when finishing, M stage iterative detections terminate；
The iterations K of each default iterative detection of detection-phasemWith judgement distance threshold value αmPermission is identical also to be allowed
It is different.Wherein, 0 ＜ αm＜ 1, m=1,2 ..., M, M are default detection-phase number.
The step R12 comprises the following steps：
Step R12-1：The initial reception signal of storing step R11 outputs, the initial reception signal is the first detection rank
The corresponding initial reception signal of each layer in sectionThat is m=1；
Step R12-2：To the initial reception signal r of the first detection-phase described in step R12-1(m)Equilibrium is carried out, is sentenced
Certainly obtain the primary decision signal in current detection stageWherein, ()ΤRepresenting matrix or vector
Transposition；
Step R12-3：Using the primary decision signal of the step R12-2To obtain mimo wireless communication receiver
The reconstruction signal of the l layers of symbol correspondence transmission signal for receiving, i.e.,L=1,2 ..., NT；Further, it is right
Other N in addition to l layers that mimo wireless communication receiver is receivedTThe reconstruction signal of -1 layer of symbol correspondence transmission signal enters
Row superposition is obtainedl∈{1,2,…,NT, i.e. other NT- 1 layer of symbol is to the l layers of interference of symbol；Wherein, H(m)It is m-th channel estimate matrix of detection-phase,For the l of corresponding channel estimate matrix is arranged, m=1,2 ..., M, l
=1,2 ..., NT；
Step R12-4：Carry out m-th K of detection-phasemWheel iterative detection, and determine the current detection stage detection can
The corresponding label of layer by property more than current preset thresholding, i.e.,I=1,2 ..., Nm, m-th inspection of correspondence
The N of survey stage detectionmLayer；
Step R12-5：Update m-th N of detection-phase detectionmThe reconstruction signal of layer symboli
=1,2 ..., Nm, and corresponded to reconstruction signal sumFrom the initial reception signal r in current detection stage(m)In
Eliminate, so as to obtain the initial reception signal r of next detection-phase(m+1)；
Step R12-6：By channel estimate matrix H(m)Corresponding to the N of current detection stage detectionmThe row zero setting of layer, that is, exist
At the end of m-th detection-phase, orderI=1,2 ..., Nm, obtain H(m+1), and recalculate
Balanced matrix；
Step R12-7：M=m+1, continues next detection-phase, that is, repeat the above steps R12-2 to step R12-6；
Step R12-8：Last detection-phase terminates, and exports the conclusive judgement signal of M stage iterative detections
Each detection-phase reliability depends on default reliable more than the number of the layer of pre-determined threshold in the step R12-4
Property threshold value 1- αm。
Last detection-phase no longer needs to carry out step R12-5 to described in step R12-7 in the step R12-8
Renewal process and subsequent processes, that is, by the K described in step R12-4MWheel iterative detection obtains conclusive judgement
The output described in step R12-8 is directly carried out after signal.
K in m-th detection-phase of the step R12-4mWheel iterative detection, refers to choose a kind of iteration detection method
(for example, IIC) carries out KmTake turns the process of detection.
M-th detection-phase K in the step R12-4mAfter wheel iterative detection is completed, if the same phase of decision statistics point
Amount and quadrature component are higher than 1- α in reliabilitymIn the range of, then corresponding layer is defined as layer of the reliability more than pre-determined threshold,
I.e. m-th layer of detection-phase detection.Wherein, 1- αmIt is default reliability threshold value.The primary for updating m-th detection-phase is sentenced
Certainly signalCorresponding to the detection-phase detection NmThe component of layer, obtains m-th conclusive judgement signal of detection-phase
Reliability more than the layer of pre-determined threshold is determined according to Euclidean distance in the multistage iterative detection of the step R13
's：On standard constellation point mapping graph, to each detection-phase judgement distance threshold value α for givingmIf, decision statistics to standard
The Euclidean distance of constellation point is not more than αm, then the corresponding layer of the decision statistics is that reliability is higher than 1- αmLayer.It should be noted that
Here 1- α in describingmIt is default reliability threshold value, αmIt is judgement distance threshold value.
A kind of multistage iterative detection device of mimo wireless communication receiver, including receive pre-processing module, multistage
Iterative detection module, judging module and output module；
The reception pre-processing module, the signal to receiving is carried out at down coversion, analog-to-digital conversion, synchronization and channel estimation
Reason, obtains first detection-phase and initially receives signal；
The multistage iterative detection module, letter is successively extracted to the initial signal that receives by stage using iteration detection method
Number, obtain multistage iterative detection conclusive judgement signal；
Judging module, the conclusive judgement signal to being obtained through multistage iterative detection makes decisions；
Output module, the signal after output judgement, that is, export final detection result.
Beneficial effects of the present invention：
The present invention by the further improvement to existing iteration detection method, before less complexity and amount of calculation is increased
Put, the performance of mimo wireless communication receiver is got a promotion.
Brief description of the drawings
Fig. 1 is the general schematic flow diagram of reception signal method in a kind of mimo system according to embodiments of the present invention.
Fig. 2 is that a kind of multistage iteration detection method of mimo wireless communication receiver according to embodiments of the present invention is specific
The general schematic flow diagram of realization.
Fig. 3 is the schematic diagram of reception recoil simulator in a kind of mimo system according to embodiments of the present invention.
Specific embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
In the following embodiments, iteration detection method uses IIC, obtains the mode of iteration initial value using MMSE criterions
Direct detection after linear equalization, each detection-phase reliability determines more than the layer of pre-determined threshold according to part decision method.
Reliability refers to the probability that institute's transmission signal is correctly adjudicated, and the probability correctly adjudicated is bigger, and reliability is bigger.
Fig. 1 is the general schematic flow diagram of reception signal method in a kind of mimo system according to embodiments of the present invention.
The method includes following processing procedure.
In the embodiment, corresponding mimo channel model is represented by r=Hx+n.Wherein,For
Emission signal vector,It is received signal vector, xiAnd yj, i=1,2 ..., NT, j=1,2 ..., NRPoint
Not Wei certain moment transmission symbol and receive symbol；It is noise vector；
It is channel matrix, Hi, i=1,2 ..., NT, it is the Column vector groups of H.
In the embodiment, NT≤NR。
In R11, the docking collection of letters number respectively is processed, and obtains the initial reception signal of the first detection-phase.Wherein, treatment bag
Include equilibrium of down coversion, analog-to-digital conversion, synchronization and channel estimation and routine etc..
In R12, multistage iterative detection is carried out to above-mentioned initial reception signal, obtain corresponding conclusive judgement signal.
In R13, the above-mentioned conclusive judgement signal through obtained by multistage iterative detection is made decisions.
In R14, the signal after above-mentioned judgement is exported, that is, export final detection result.
It should be noted that, reliability is according to Euclidean distance more than the layer of pre-determined threshold during multistage iterative detection
Determine.Specifically, on standard constellation point mapping graph, to each detection-phase predetermined threshold value α for givingmIf, decision statistic
Measure the Euclidean distance no more than α of standard constellation pointm, then the corresponding layer of the decision statistics is that reliability is higher than 1- αmLayer.Example
Such as, confidence level involved in part decision method and error correcting code etc. is used equally to judge reliability more than pre-determined threshold
Layer.
Fig. 2 is that a kind of multistage iteration detection method of mimo wireless communication receiver according to embodiments of the present invention is specific
The general schematic flow diagram of realization.
In the present embodiment, NR=NT=100, detection-phase M=3, corresponding to each detection-phase iterative detection repeatedly
Generation number is respectively K1=5, K2=6, K3=8, threshold value is α1=0.75, α2=0.55, α3=0.5；In m-th detection-phase
Detected reliability is N more than the number of the layer of pre-determined thresholdm, m=1, then 2,3, N1+N2+N3=NT。
In R12-1, the output of storage Fig. 1 steps R11, the i.e. initial reception signal of the first detection-phaseM=1.
In R12-2, signal r is received to initial(m)Carry out MMSE balanced, and current detection is obtained using part decision method
The primary decision signal in stageWherein, ()ΤThe transposition of representing matrix or vector.
In R12-3, using above-mentioned primary decision signalCorresponding reception signal is reconstructed, i.e.,L=1,
2 ..., 100, it is the reconstruction signal of the l layers of symbol correspondence transmission signal received to mimo wireless communication receiver.Wherein,L ∈ { 1,2 ..., 100 }, are other in addition to l layers received to mimo wireless communication receiver
NT- 1 layer of superposition of the reconstruction signal of symbol correspondence transmission signal.
R12-4, carries out KmWheel IIC detections, and determine the layer of the reliability more than pre-determined threshold of current detection stage detection
Corresponding label, i.e.,I=1,2 ..., Nm, m-th N of detection-phase detection of correspondencemLayer.
The K in m-th detection-phase in the present embodiment is provided belowmTake turns the specific descriptions of IIC implementation process.The method
Including following operating process：Interference cancellation process, maximum-ratio combing process, part judging process and renewal current detection layer symbol
Corresponding reconstruction signal process.
For the sake of for description simply, as a example by detecting the l layers of description for implementing process of symbol in a wheel IIC.
The interference cancellation process is：From the initial reception signal in current detection stage
In subtract N in addition to l layers of symbolTThe superposition of -1 layer of symbol correspondence reconstruction signal and, i.e.,l
∈ { 1,2 ..., 100 }.
Maximum-ratio combing process refers to the baseband signal z that will be obtained(m)PremultiplicationI.e.
Wherein,Represent vectorial pseudo-inverse operation.
Part judging process refers to, using part decision method pairQuantified, obtained l layers of current detection-phase
The corresponding part decision signal of symbol
Updating the current detection layer corresponding reconstruction signal process of symbol refers to, according to described in above-mentioned steps R12-3
The process of correspondence reconstruction signal old value is updated after the reconstruct that reconstructing method completes to the corresponding transmission signal of l layer symbol, i.e., it is heavy
It is new to calculateTo update corresponding reconstruction signal, the reconstruction signal after renewal will be used for during next layer of symbol detection
Interference cancellation process.
It should be appreciated by those skilled in the art that repeating the interference cancellation process, maximum-ratio combing process, partly adjudicating
Journey with update the current detection corresponding reconstruction signal process of layer symbol to NTLayer symbol has detected, has completed one and take turns IIC detections；Weight
The multiple wheel IIC detection process KmIt is secondary, complete KmWheel IIC detections.
It should be further stated that, current detection stage KmAfter wheel IIC detections are completed, if decision statistics's
In-phase component and quadrature component are in the reserved area (D of part decision methodk-αm,Dk+αm) beyond, then be defined as can for corresponding layer
The N of the layer by property more than pre-determined threshold, i.e. current detection stage detectionmLayer.Wherein, DkIt is hard decision thresholding, with modulation system number
It is relevant, αmIt is predetermined fraction decision threshold.Update the primary decision signal in current detection stageCorresponding to the detection-phase
The N of detectionmThe component of layer, can obtain the conclusive judgement signal of current detection-phase
In R12-5, the N of current detection stage detection is updatedmThe reconstruction signal of layer symbol, i.e., I=1,2 ..., Nm, and corresponded to reconstruction signal sumFrom current detection rank
The initial reception signal r of section(m)In eliminate, obtain the initial reception signal r of next detection-phase(m+1)。
In R12-6, by channel estimate matrix H(m)Corresponding to the N of current detection stage detectionmThe row zero setting of layer, i.e.,I=1,2 ..., Nm, obtain H(m+1), and recalculate balanced matrix.
In R12-7, m=m+1, continue next detection-phase, that is, repeat the above steps R12-2-R12-6.
In R12-8, last detection-phase terminates, the conclusive judgement signal of output M stages IIC detection
It should be noted that the predetermined threshold value of part decision method in step R12-2 can be with different detection-phases
It is identical can also be different.Usually, in order to obtain better performance, what the thresholding of the detection-phase for first carrying out was carried out after should be greater than
The thresholding of detection-phase.It should be further stated that, each detection-phase reliability is more than predetermined threshold value in step R12-4
The number of layer depend on the predetermined threshold value of the part decision method.
Last detection-phase no longer needs to carry out step R12-5 to described in step R12-7 in the step R12-8
Renewal process and subsequent processes, that is, by the K described in step R12-4MWheel iterative detection obtains conclusive judgement
The output described in step R12-8 is directly carried out after signal.
Fig. 3 is the schematic diagram of reception recoil simulator in a kind of mimo system according to embodiments of the present invention.The device 300 is wrapped
Include reception pre-processing module 310, multistage iterative detection module 320, judging module 330, output module 340.Receive pre-treatment
Module 310, the signal to receiving carries out radio frequency, intermediate frequency demodulation and Base-Band Processing, including down coversion, analog-to-digital conversion, synchronization and
Equilibrium of channel estimation and routine etc., obtains the corresponding initial reception signal of first each layer symbol of detection-phase；Multistage changes
For detection module 320, signal is successively extracted by stage using iteration detection method to the initial signal that receives, obtain multistage iteration
Detection conclusive judgement signal；Judging module 330, completes conclusive judgement；Output module 340, exports final detection result.
It should be appreciated by those skilled in the art that when the embodiment of the present invention is realized, simply to illustrate that convenience in figure 3
Main functional module is simply just given, the implementation of other processing modules is increased under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
For convenience and simplicity of description, described in Fig. 3 device and its specific work process of comprising modules, may be referred to
Corresponding process in preceding method embodiment, will not be repeated here.
In the embodiment that the application is proposed, it should be appreciated that disclosed apparatus and method can be in other way
Realize.For example, what device described above was merely exemplary, for example, the division of the module is only a kind of logic work(
Can divide, there can be other dividing mode when actually realizing.
It should be appreciated by those skilled in the art that the precoding functional module in each embodiment of the invention can be comprising multiple
Processing unit, in may alternatively be integrated within a processing unit.
In the above-described embodiments, the description to each embodiment all emphasizes particularly on different fields, and does not have the portion described in detail in certain embodiment
Divide the associated description that may refer to other embodiment.
Although above-mentioned be described with reference to accompanying drawing to specific embodiment of the invention, not to present invention protection model
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need the various modifications made by paying creative work or deformation still within protection scope of the present invention.
Claims (9)
1. a kind of multistage iteration detection method of mimo wireless communication receiver, it is characterized in that, comprise the following steps：
Step R11：The docking collection of letters number respectively is processed, and obtains the initial reception signal of the first detection-phase；The treatment includes
Down coversion, analog-to-digital conversion, synchronization, channel estimation and equilibrium；
Step R12：Multistage iterative detection is carried out to above-mentioned initial reception signal, corresponding conclusive judgement signal is obtained；
Step R13：Conclusive judgement signal to being obtained through multistage iterative detection makes decisions；
Step R14：Signal after output judgement, that is, export final detection result；
The carrying out multistage iterative detection of the step R12 is：Multiple detection-phases are set, detection is iterated stage by stage：
Wherein, in the first detection-phase, only detect that reliability is higher than 1- α1Corresponding N1Layer, you can be more than pre-determined threshold by property
1-α1Layer, wherein, α1It is first stage predetermined threshold value；
The quadrature component and in-phase component of and if only if decision statistics are satisfied by reliability higher than 1- α1When, just claim respective layer
Reliability is higher than 1- α1, i.e. this layer is layer of the reliability more than pre-determined threshold；
, it is necessary to channel matrix to be corresponded to the N of the first detection-phase detection before the second detection-phase is carried out1The row of layer are set to
Zero, and the N that the first detection-phase is detected1After the corresponding judgement output signal reconstruct of layer, as interference from current detection stage
Initial reception signal in eliminate, obtain the initial reception signal of the second detection-phase；So as to by former NT×NRMimo system etc.
It is (a N to imitateT-N1)×NRMimo system；
In the second detection-phase, by former NT×NRMimo system be equivalent to (a NT-N1)×NRMimo system after, by with
The same method of one detection-phase detects that reliability is higher than predetermined threshold value 1- α2Corresponding N2Layer；Wherein, NTAnd NRRespectively
Transmitting antenna number and reception antenna number, N1It is the number of the layer of first stage detection, α2It is current detection stage predetermined threshold value；
It was intended to do a upper detection-phase foregoing to the treatment of the first detection-phase identical before m-th detection-phase detection,
So that the system in current detection stage is equivalent to [a NT-(N1+…+Nm-1)]×NRSystem, be effectively utilized extra reception
Diversity；Wherein, m=1,2 ..., M, M are default detection-phase number；
The N that M-1 detection-phase is not detected before last m-th detection-phase detectionT-(N1+…+NM-1) layer, that is, work as NTLayer quilt
When detection is finished, M stage iterative detections terminate；
The iterations K of each default iterative detection of detection-phasemWith judgement distance threshold value αmAllow identical also permission not
Together；Wherein, 0 ＜ αm＜ 1, m=1,2 ..., M, M are default detection-phase number.
2. a kind of multistage iteration detection method of mimo wireless communication receiver as claimed in claim 1, it is characterized in that, institute
Step R12 is stated to comprise the following steps：
Step R12-1：The initial reception signal of storing step R11 outputs, the initial reception signal is in the first detection-phase
The corresponding initial reception signal of each layer
Step R12-2：To the initial reception signal r described in step R12-1(m)Carry out MMSE balanced, and using part judgement side
Method obtains the corresponding primary decision signal of current detection stage each layerWherein, ()ΤRepresent square
The transposition of battle array or vector；
Step R12-3：Using the primary decision signal of the step R12-2Received to obtain mimo wireless communication receiver
The reconstruction signal of the l layers of symbol correspondence transmission signal for arriving, i.e.,Further, to MIMO without
Other N in addition to l layers that line communication control processor is receivedTThe reconstruction signal of -1 layer of symbol correspondence transmission signal is superimposed
ArriveThat is other NT- 1 layer of symbol is to the l layers of interference of symbol；Wherein, H(m)It is m-th
The channel estimate matrix of detection-phase,For the l of corresponding channel estimate matrix is arranged, m=1,2 ..., M, l=1,2 ...,
NT；
Step R12-4：Carry out m-th K of detection-phasemWheel iterative detection, and determine that the current detection stage reliability of detection is big
In the corresponding label of the layer of current preset thresholding, i.e.,M-th detection-phase of correspondence
The N of detectionmLayer；
Step R12-5：Update m-th N of detection-phase detectionmThe reconstruction signal of layer symbol
And corresponded to reconstruction signal sumFrom the initial reception signal r in current detection stage(m)In eliminate so that
Obtain the initial reception signal r of next detection-phase(m+1)；
Step R12-6：By channel estimate matrix H(m)Corresponding to the N of current detection stage detectionmThe row zero setting of layer, i.e.,Obtain H(m+1), and recalculate balanced matrix；
Step R12-7：M=m+1, continues next detection-phase, that is, repeat the above steps R12-2 to step R12-6；
Step R12-8：Last detection-phase terminates, the conclusive judgement signal of output M stages IIC detection
3. a kind of multistage iteration detection method of mimo wireless communication receiver as claimed in claim 2, it is characterized in that,
Each detection-phase reliability depends on default reliability door more than the number of the layer of pre-determined threshold in the step R12-4
Limit value 1- αm；
Last detection-phase no longer needs to carry out step R12-5 to step R12-7 in the step R12-8, in step
The output of step R12-8 is directly carried out after R12-4.
4. a kind of multistage iteration detection method of mimo wireless communication receiver as claimed in claim 2, it is characterized in that,
K in m-th detection-phase of the step R12-4mWheel IIC detections, including：Interference cancellation process, maximum-ratio combing mistake
Journey, part judging process reconstruction signal process corresponding with current detection layer symbol is updated.
5. a kind of multistage iteration detection method of mimo wireless communication receiver as claimed in claim 4, it is characterized in that,
The interference cancellation process is：From the initial reception signal in current detection stageIn subtract except l
N beyond layer symbolTThe superposition of -1 layer of symbol correspondence reconstruction signal and, i.e.,
The maximum-ratio combing process is：The baseband signal z that will be obtained(m)PremultiplicationI.e.Wherein,Represent vectorial pseudo-inverse operation.
6. a kind of multistage iteration detection method of mimo wireless communication receiver as claimed in claim 5, it is characterized in that,
The part judging process is：Using part decision method pairQuantified, obtained l layers of symbol of current detection-phase
Number corresponding part decision signal
The renewal current detection layer corresponding reconstruction signal process of symbol be：According to the reconstruct side described in step R12-3
After method completes the reconstruct to the corresponding transmission signal of l layer symbol, the process of correspondingly reconstruction signal old value is updated, that is, recalculatedTo update corresponding reconstruction signal, the reconstruction signal after renewal is by for the interference during next layer of symbol detection
Elimination process.
7. a kind of multistage iteration detection method of mimo wireless communication receiver as claimed in claim 2, it is characterized in that,
M-th detection-phase K in the step R12-4mWheel iterative detection complete after, if the in-phase component of decision statistics and
Quadrature component is higher than 1- α in reliabilitymIn the range of, then corresponding layer is defined as layer of the reliability more than pre-determined threshold, i.e. m
The layer of individual detection-phase detection；Wherein, 1- αmIt is default reliability threshold value；Update m-th primary judgement letter of detection-phase
NumberCorresponding to the detection-phase detection NmThe component of layer, obtains m-th conclusive judgement signal of detection-phase
8. a kind of multistage iteration detection method of mimo wireless communication receiver as claimed in claim 2, it is characterized in that,
Reliability more than the layer of predetermined threshold value is determined according to Euclidean distance in the multistage iterative detection of the step R13
's：On standard constellation point mapping graph, to each detection-phase judgement distance threshold value α for givingmIf, decision statistics to standard
The Euclidean distance of constellation point is not more than αm, then the corresponding layer of the decision statistics is that reliability is higher than 1- αmLayer.
9. the multistage iterative detection device of a kind of mimo wireless communication receiver, it is characterized in that, including receive pre-processing module,
Multistage iterative detection module, judging module and output module；
The reception pre-processing module, the signal to receiving carries out radio frequency, intermediate frequency demodulation and Base-Band Processing, obtains first detection
The corresponding initial reception signal of stage each layer symbol；
The multistage iterative detection module, signal is successively extracted to the initial signal that receives by stage using iteration detection method,
Obtain multistage iterative detection conclusive judgement signal；
Judging module, the conclusive judgement signal to being obtained through multistage iterative detection makes decisions；
Output module, the signal after output judgement, that is, export final detection result；
It is described that signal is successively extracted by stage using iteration detection method to the initial signal that receives, obtain multistage iterative detection most
Whole decision signal refers to：
Multiple detection-phases are set, detection is iterated stage by stage：
Wherein, in the first detection-phase, only detect that reliability is higher than 1- α1Corresponding N1Layer, you can be more than pre-determined threshold by property
1-α1Layer, wherein, α1It is first stage predetermined threshold value；
The quadrature component and in-phase component of and if only if decision statistics are satisfied by reliability higher than 1- α1When, just claim respective layer
Reliability is higher than 1- α1, i.e. this layer is layer of the reliability more than pre-determined threshold；
, it is necessary to channel matrix to be corresponded to the N of the first detection-phase detection before the second detection-phase is carried out1The row of layer are set to
Zero, and the N that the first detection-phase is detected1After the corresponding judgement output signal reconstruct of layer, as interference from current detection stage
Initial reception signal in eliminate, obtain the initial reception signal of the second detection-phase；So as to by former NT×NRMimo system etc.
It is (a N to imitateT-N1)×NRMimo system；
In the second detection-phase, by former NT×NRMimo system be equivalent to (a NT-N1)×NRMimo system after, by with
The same method of one detection-phase detects that reliability is higher than predetermined threshold value 1- α2Corresponding N2Layer；Wherein, NTAnd NRRespectively
Transmitting antenna number and reception antenna number, N1It is the number of the layer of first stage detection, α2It is current detection stage predetermined threshold value；
It was intended to do a upper detection-phase foregoing to the treatment of the first detection-phase identical before m-th detection-phase detection,
So that the system in current detection stage is equivalent to [a NT-(N1+…+Nm-1)]×NRSystem, be effectively utilized extra reception
Diversity；Wherein, m=1,2 ..., M, M are default detection-phase number；
The N that M-1 detection-phase is not detected before last m-th detection-phase detectionT-(N1+…+NM-1) layer, that is, work as NTLayer quilt
When detection is finished, M stage iterative detections terminate；
The iterations K of each default iterative detection of detection-phasemWith judgement distance threshold value αmAllow identical also permission not
Together；Wherein, 0 ＜ αm＜ 1, m=1,2 ..., M, M are default detection-phase number.
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| US10263669B2 (en) * | 2016-08-26 | 2019-04-16 | Qualcomm Incorporated | Tiered control of iterative MIMO receivers |
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| Publication number | Priority date | Publication date | Assignee | Title |
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