CN105337653B - Signal acceptance method, apparatus and system in a kind of mimo system - Google Patents
Signal acceptance method, apparatus and system in a kind of mimo system Download PDFInfo
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- CN105337653B CN105337653B CN201410395305.7A CN201410395305A CN105337653B CN 105337653 B CN105337653 B CN 105337653B CN 201410395305 A CN201410395305 A CN 201410395305A CN 105337653 B CN105337653 B CN 105337653B
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Abstract
The invention discloses signal acceptance method, device and the mimo systems in a kind of mimo system.Signal acceptance method in its mimo system include: successively it is determining it is to be detected send the estimated value that each component of symbol is respectively sent in signal, and the corresponding Soft output information of each component is determined according to the estimated value of each component for sending symbol respectively；In one transmission symbol of every determination after the corresponding Soft output information of each component, the corresponding Soft output information of each component of the transmission symbol is exported；According to the corresponding Soft output information of each component of the transmission symbol received, the transmission symbol is decoded.Signal acceptance method in mimo system provided in an embodiment of the present invention carries out MIMO detection by component, and compared with the prior art, detection error probability is lower, can effectively improve system performance.
Description
Technical field
The present invention relates to multiple-input and multiple-output (Multiple-Input Multiple-Output, MIMO) communication technology necks
Domain more particularly to signal acceptance method, apparatus and system in a kind of mimo system.
Background technique
Mimo system is the transmission that wireless signal is carried out using more transmission antennas and Duo Gen receiving antenna.
Mimo system includes at least MIMO transmitter and MIMO receiver.Wherein, MIMO transmitter completes the transmission of signal
Process, MIMO receiver complete the receive process of signal.
MIMO detection is the core of MIMO receive process.Wherein, (Symbol-level is deleted based on the soft interference of symbol level
Soft interference Cancellation, SLSC) and linear minimum mean-squared error (LMMSE) filtering detection algorithm
(hereinafter referred to as SLSC-LMMSE detection algorithm) is considered as achievable and performance preferably MIMO detection algorithm.
In MIMO receiver using SLSC-LMMSE detection algorithm, the channel decoder serial stage of detector and rear end
Connection, interaction external information, gradually restrains during iterative receiver between detector and channel decoder, obtains successfully decoded.
Existing SLSC-LMMSE detection algorithm, during iterative receiver, modulation symbol is deleted one by one.Due to repeatedly
The mistake of detection each time during pickup is received can be all passed down, and be accumulated in an iterative process, and modulate symbol one by one
Number delete occur detection mistake probability it is larger, so that overall performance be made to deteriorate.
In addition, existing use polynary low density parity check code (Low Density Parity Check Code, LDPC)
The mimo system of encoder/decoder.Wherein, the order of the finite field of LDPC code is equal or higher with order of modulation, this is for high contrast
For system, the complexity of channel decoding can be very high.
Summary of the invention
The object of the present invention is to provide the signal acceptance methods and device in a kind of mimo system, to solve iterative receiver mistake
The problem of Cheng Zhong, the detection error probability that modulation symbol is deleted one by one is larger, and overall performance is caused to deteriorate.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of signal acceptance method in mimo system, comprising:
Successively determine the estimated value that each component of symbol is respectively sent in transmission signal to be detected, and according to transmission symbol
The estimated value of each component determines the corresponding Soft output information of each component respectively；Each component is corresponding in one transmission symbol of every determination
After Soft output information, the corresponding Soft output information of each component of the transmission symbol is exported；
According to the corresponding Soft output information of each component of the transmission symbol received, the transmission symbol is decoded.
Preferably, successively determining the estimated value for respectively sending each component of symbol in transmission signal to be detected, comprising:
By the way of soft interference deletion, estimating for each component that symbol is respectively sent in transmission signal to be detected is successively determined
Evaluation.
Based on above-mentioned any means embodiment, the every of symbol is respectively sent preferably, successively determining in transmission signal to be detected
The estimated value of a component, comprising:
By the way of linear minimum mean-squared error filtering, successively determines in transmission signal to be detected and respectively send the every of symbol
The estimated value of a component.
Based on above-mentioned any means embodiment, preferably, corresponding soft defeated according to each component of the transmission symbol received
Information out decodes the transmission symbol, comprising:
According to the corresponding Soft output information of each component of the transmission symbol received, low-density is carried out to the transmission symbol
Parity check code LDPC decoding.
A kind of MIMO signal reception device, comprising:
MIMO signal detection module, for successively determining that each component for respectively sending symbol in transmission signal to be detected is estimated
Evaluation, and the corresponding Soft output information of each component is determined according to the estimated value for each component for sending symbol respectively；Every determination one
It sends in symbol after the corresponding Soft output information of each component, exports the corresponding Soft output information of each component of the transmission symbol；
MIMO signal decoding module, it is right for the corresponding Soft output information of each component according to the transmission symbol received
The transmission symbol is decoded.
Preferably, successively determine when respectively sending the estimated value of each component of symbol in transmission signal to be detected, it is described
MIMO signal detection module is used for:
By the way of soft interference deletion, estimating for each component that symbol is respectively sent in transmission signal to be detected is successively determined
Evaluation.
Based on above-mentioned any MIMO signal reception device embodiment, preferably, successively determining each in transmission signal to be detected
When sending the estimated value of each component of symbol, the MIMO signal detection module is used for:
By the way of linear minimum mean-squared error filtering, successively determines in transmission signal to be detected and respectively send the every of symbol
The estimated value of a component.
Based on above-mentioned any MIMO signal reception device embodiment, preferably, the MIMO signal decoding module is specifically used
In:
According to the corresponding Soft output information of each component of the transmission symbol received, low-density is carried out to the transmission symbol
Parity check code LDPC decoding.
A kind of MIMO receiver, comprising:
MIMO detector, for successively determining the estimated value for respectively sending each component of symbol in transmission signal to be detected,
And the corresponding Soft output information of each component is determined according to the estimated value for each component for sending symbol respectively；One transmission symbol of every determination
In number after the corresponding Soft output information of each component, the corresponding Soft output information of each component of the transmission symbol is exported；
MIMO decoder, for the corresponding Soft output information of each component according to the transmission symbol received, to the hair
Symbol is sent to be decoded.
Preferably, successively determine when respectively sending the estimated value of each component of symbol in transmission signal to be detected, it is described
MIMO detector is used for:
By the way of soft interference deletion, estimating for each component that symbol is respectively sent in transmission signal to be detected is successively determined
Evaluation.
Based on above-mentioned any MIMO signal reception device embodiment, preferably, successively determining each in transmission signal to be detected
When sending the estimated value of each component of symbol, the MIMO detector is used for:
By the way of linear minimum mean-squared error filtering, successively determines in transmission signal to be detected and respectively send the every of symbol
The estimated value of a component.
Based on above-mentioned any MIMO reception device embodiment, preferably, the MIMO decoder is specifically used for:
According to the corresponding Soft output information of each component of the transmission symbol received, low-density is carried out to the transmission symbol
Parity check code LDPC decoding.
MIMO signal method of reseptance and device provided in an embodiment of the present invention carry out MIMO detection by component, compared with existing
Technology, detection error probability is lower, can effectively improve system performance.In addition, the MIMO of the prior art is detected, it is to plural number
It is handled, processing complexity is high, is unfavorable for realizing by FPGA hardware.And the embodiment of the present invention carries out MIMO inspection by component
The process of survey is handled real number, and FPGA hardware realization of High Speed is conducive to.
The object of the invention is also to provide a kind of mimo systems, during solving iterative receiver, modulation symbol one by one
The problem of detection error probability deleted is larger, and overall performance is caused to deteriorate and when high order modulation, channel decoding are complicated
Spend high problem.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of mimo system, including MIMO signal reception device and MIMO signal sending device；
The MIMO signal sending device includes MIMO signal coding module and MIMO signal modulation module；
The MIMO signal coding module is used to encode transmission signal；
The MIMO signal modulation module is for being modulated the transmission signal after coding；
The MIMO signal reception device includes MIMO signal detection module and MIMO signal decoding module；
The MIMO signal detection module is used to successively determine each component that symbol is respectively sent in the transmission signal
Estimated value, and the corresponding Soft output information of each component is determined according to the estimated value for each component for sending symbol respectively；Every determination one
In a transmission symbol after the corresponding Soft output information of each component, the corresponding Soft output information of each component of the transmission symbol is exported；
The MIMO signal decoding module is used for the corresponding Soft output information of each component according to the transmission symbol received,
The transmission symbol is decoded.
Preferably, the MIMO signal coding module is specifically used for:
Finite field gf (Q)-low density parity check code LDPC coding is carried out to the transmission signal；
The LDPC code member grouping that coding obtains is mapped to each modulation symbol, wherein one group of LDPC code member is reflected respectively
It is mapped to each component an of modulation symbol；
The MIMO signal modulation module is specifically used for:
It is modulated according to the LDPC code member for being mapped to modulation symbol to signal is sent, it is corresponding to obtain the transmission signal
One group of modulation symbol.
Preferably, first prime number that the finite field that the order of modulation of the modulation symbol is above-mentioned LDPC code member includes.
Preferably, the MIMO signal decoding module is specifically used for:
According to the corresponding Soft output information of each component of the transmission symbol received, low-density is carried out to the transmission symbol
Parity check code LDPC decoding.
Wherein, MIMO signal sending device can with but be not limited only to be MIMO transmitter, include at least MIMO encoder,
The function of above-mentioned MIMO signal coding module is implemented, MIMO modulator implements above-mentioned MIMO signal modulation module
Function.
MIMO signal reception device can with but be not limited only to be MIMO receiver.
In mimo system provided in an embodiment of the present invention, MIMO signal reception device carries out MIMO detection by component, compared with
The prior art, detection error probability is lower, can effectively improve system performance.In addition, the MIMO of the prior art is detected, it is pair
Plural number is handled, and processing complexity is high, is unfavorable for realizing by FPGA hardware.And the embodiment of the present invention is carried out by component
The process of MIMO detection, is to handle real number, is conducive to FPGA hardware realization of High Speed.In addition, the embodiment of the present invention provides
Technical solution, the finite field of LDPC code is lower than order of modulation, so that translating when subsequent MIMO signal reception device is decoded
Code complexity reduces.
Detailed description of the invention
Fig. 1 is mimo system schematic diagram provided in an embodiment of the present invention；
Fig. 2 is MIMO signal sending device schematic diagram provided in an embodiment of the present invention；
Fig. 3 is MIMO transmitter schematic diagram provided in an embodiment of the present invention；
Fig. 4 is MIMO transmission process schematic diagram provided in an embodiment of the present invention；
Fig. 5 is MIMO signal reception device schematic diagram provided in an embodiment of the present invention；
Fig. 6 is MIMO receiver schematic diagram provided in an embodiment of the present invention；
Fig. 7 is MIMO signal method of reseptance flow chart provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with attached drawing, technical solution provided in an embodiment of the present invention is described in detail.
As shown in Figure 1, mimo system provided in an embodiment of the present invention includes MIMO signal reception device 101 and MIMO signal
Sending device 102.
As shown in Fig. 2, MIMO signal sending device 102 includes at least MIMO signal coding module 201 and MIMO signal tune
Molding block 202.
Wherein, MIMO signal coding module 201 is used to encode transmission signal.
Wherein, MIMO signal modulation module 202 is for being modulated the transmission signal after coding.
Preferably, being encoded using LDPC.For example, 201 pairs of transmission signals of MIMO signal coding module carry out GF (Q)-
Then the LDPC code member grouping that coding obtains is mapped to each modulation symbol by LDPC coding, wherein one group of LDPC code member difference
It is mapped to each component an of modulation symbol.MIMO signal modulation module 202 is according to the LDPC code member for being mapped to modulation symbol
It is modulated to signal is sent, obtains the corresponding one group of modulation symbol of above-mentioned transmission signal.
Preferably, the order of modulation of modulation symbol is first prime number of the finite field of above-mentioned LDPC code member.
Specifically, if being encoded using GF (Q)-LDPC, the element that the finite field of the LDPC code member encoded includes
Number is Q, and the order of modulation of modulation symbol is Q.
In the embodiment of the present invention, MIMO signal sending device can with but be not limited only to be MIMO transmitter, as shown in Figure 3.
Wherein, MIMO transmitter 300 includes at least MIMO encoder 301, implements the function of above-mentioned MIMO signal coding module；
MIMO modulator 302 implements the function of above-mentioned MIMO signal modulation module.
In the embodiment of the present invention, modulation system can with but be not limited only to QAM modulation.It should be pointed out that any modulation symbol
Number it is suitable for the present invention for the modulation system of plural form.In the embodiment of the present invention, the component of so-called modulation symbol is modulated
The value of the symbol projection in X-axis and Y-axis respectively, such as the road the I/Q component of QAM modulation symbol.
By taking 16QAM is modulated as an example, in existing MIMO transmission process, compiled to signal is sent using GF (16)-LDPC
Code, is respectively mapped to a 16QAM modulation symbol for obtained each GF (16)-LDPC code member.That is the finite field of LDPC code
Order is same or higher with order of modulation.With the increase of order of modulation, the complexity of channel decoding can be very high.
Still by taking 16QAM is modulated as an example, as shown in figure 4, using GF to signal is sent in MIMO transmission process of the invention
(4)-LDPC is encoded, and two LDPC code members are respectively mapped to the road the I component and the road Q of a 16QAM modulation symbol every time
Then component is modulated by QAM modulation device (specific implementation of MIMO signal modulation module in this embodiment), then passed through
It is sent after being converted by S/P.The finite field of technical solution provided in an embodiment of the present invention, LDPC code is lower than order of modulation, so that after
Decoding complexity when continuous MIMO signal reception device is decoded reduces.
As shown in figure 5, MIMO signal reception device 101 includes at least MIMO signal detection module 501 and MIMO signal is translated
Code module 502.
Wherein, MIMO signal detection module 501 respectively sends each of symbol for successively determining in transmission signal to be detected
The estimated value of component, and the corresponding Soft output information of each component is determined according to the estimated value for each component for sending symbol respectively；Often
It determines in a transmission symbol after the corresponding Soft output information of each component, exports the corresponding soft output of each component of the transmission symbol
Information.
Wherein, MIMO signal decoding module 502 is used for the corresponding soft output of each component according to the transmission symbol received
Information decodes the transmission symbol.
MIMO signal reception device provided in an embodiment of the present invention carries out MIMO detection by component, compared with the prior art,
It is lower to detect error probability, system performance can be effectively improved.In addition, the MIMO of the prior art is detected, it is at plural number
Reason, processing complexity is high, is unfavorable for realizing by FPGA hardware.And the embodiment of the present invention carries out the mistake of MIMO detection by component
Journey is handled real number, and FPGA hardware realization of High Speed is conducive to.
In the embodiment of the present invention, symbol, that is, modulation symbol is sent.
In technical solution provided in an embodiment of the present invention, when carrying out MIMO detection, each transmission in transmission symbol to be detected
The order of symbol can with but be not limited only to determine by least mean-square error (MSE) criterion；Send each component in symbol
Order, which can be, makes an appointment with MIMO signal sending device, is also possible to preconfigured.
Preferably, can successively determine in transmission signal to be detected by the way of soft interference deletion and respectively send symbol
The estimated value of each component.
Based on above-mentioned any MIMO signal reception device embodiment, preferably, by the way of LMMSE, successively determine to
The estimated value of each component of symbol is respectively sent in detection of transmitted signals.
Based on above-mentioned any MIMO signal reception device embodiment, preferably, MIMO signal decoding module is according to receiving
Transmission symbol the corresponding Soft output information of each component, to send symbol carry out LDPC decoding.
In the embodiment of the present invention, MIMO signal reception device can with but be not limited only to be MIMO receiver, as shown in Figure 6.
Wherein, MIMO receiver 600 includes at least MIMO detector 601, implements the function of above-mentioned MIMO signal detection module；
MIMO decoder 602 implements the function of above-mentioned MIMO signal decoding module.
The embodiment of the present invention also provides the signal acceptance method in a kind of mimo system, as shown in fig. 7, this method is specifically wrapped
Include following operation:
Step 700 successively determines the estimated value that each component of symbol is respectively sent in transmission signal to be detected, and according to hair
The estimated value of each component of symbol is sent to determine the corresponding Soft output information of each component respectively；Each point in one transmission symbol of every determination
After measuring corresponding Soft output information, the corresponding Soft output information of each component of the transmission symbol is exported；
Step 701, according to receive transmission symbol the corresponding Soft output information of each component, to the transmission symbol into
Row decoding.
In the embodiment of the present invention, the specific implementation of signal acceptance method is referred to above-mentioned apparatus embodiment in mimo system
Description, overlaps will not be repeated.
MIMO signal method of reseptance provided in an embodiment of the present invention carries out MIMO detection by component, compared with the prior art,
It is lower to detect error probability, system performance can be effectively improved.In addition, the MIMO of the prior art is detected, it is at plural number
Reason, processing complexity is high, is unfavorable for realizing by FPGA hardware.And the embodiment of the present invention carries out the mistake of MIMO detection by component
Journey is handled real number, and FPGA hardware realization of High Speed is conducive to.
Preferably, successively determining the estimated value for respectively sending each component of symbol in transmission signal to be detected, comprising:
By the way of soft interference deletion, estimating for each component that symbol is respectively sent in transmission signal to be detected is successively determined
Evaluation.
Based on above-mentioned any means embodiment, the every of symbol is respectively sent preferably, successively determining in transmission signal to be detected
The estimated value of a component, comprising:
By the way of linear minimum mean-squared error filtering, successively determines in transmission signal to be detected and respectively send the every of symbol
The estimated value of a component.
Based on above-mentioned any means embodiment, preferably, corresponding soft defeated according to each component of the transmission symbol received
Information out decodes the transmission symbol, comprising:
According to the corresponding Soft output information of each component of the transmission symbol received, low-density is carried out to the transmission symbol
Parity check code LDPC decoding.
Below by taking (CLSC)-LMMSE detection is deleted in interference soft by component as an example, MIMO provided in an embodiment of the present invention is connect
The course of work of receipts machine is illustrated.
Assuming that the antenna number of MIMO transmitter is N in mimo systemt, the antenna number of MIMO receiver is Nr, to be detected
Transmission signal is x, xkTo send k-th of component in signal, k=1,2 ... ..., 2Nt。
Step 1: x is determined based on CLSC-LMMSEkEstimated value
It can be obtained by following formula 1:
Wherein, wkFor filter vector, ykFor the reception signal after equilibrium.
ykIt can be obtained by following formula 2:
Wherein, y is to receive signal, E(xi)
It is calculated as 1≤i≤k-1 using posterior probability for the mean value of all components to be detected, as k+1≤i≤2NtWhen, it adopts
It is calculated with prior probability.
The filter vector w of LMMSE filteringkIt can be obtained by following formula 3:
According to derivation, wkIt is represented by following formula 4:
Formula (4)
Wherein, Var (xk)=0.5, hkIt is the kth column of channel matrix H,It is 2Nr×2NrUnit matrix,For
The noise variance of MIMO receiver, VxIt can be obtained by following formula 5:
Formula (5)
Wherein, VxIt is the covariance matrix for sending signal x,It is by [x1,…,xk-1]TPosterior information calculation obtain
The covariance matrix arrived,It is by [xk+1,…,]TThe covariance matrix that is calculated of priori probability information.And
And in xkDetection process in, remain VxK-th of diagonal entry be 0.5.ThereforeWithAll corresponding letter
It is melted into diagonal matrix.With covariance matrixOrI-th of diagonal entry forIt can be by such as
Lower formula 6 is calculated:
Formula (6)
Wherein,
It indicates and modulation symbol component xiQ log-likelihood ratio information of corresponding GF (Q)-LDPC code member, flag are used
To show that it is prior information or posterior information.By taking 16QAM is modulated as an example, each modulation symbol component is taken from 4 pulse amplitudes
(4Pulse-amplitude modulation, 4PAM) signal is modulated, therefore Q=4, χ are the collection of the point on 4PAM planisphere
It closes, χ (α) is the point on 4PAM planisphere.Therefore to modulation sign component xkEstimated value are as follows:
(formula 7)
The external information LLR ratio (LLRs) of step 2:MIMO detector output calculates:
After the filtering of formula (1), obtain as shown in formula (7) with xkTo input,For the equivalent Gauss of output
Channel.Modulation symbol component xkCorresponding Q soft output posterior informations (i.e. Soft output information) can calculate as follows:
Formula (8)
Wherein, α ∈ GF (Q), it is clear that Lext(xk=0)=0.It can be seen that calculating the soft output posteriority of each modulation symbol component
It is unrelated with other modulation symbol components when information, therefore the complexity of detection can be substantially reduced.Complete xkDetection
Afterwards, xkInto in detection symbols component set, and need to update xkLLR value and mean variance, after these values are used to auxiliary
Continuous modulation symbol component detection.Next need to determine next modulation symbol component for needing to detect by MSE criterion,
It is denoted as xk+1, successively go on, until completing 2NtThe detection of a modulation symbol component.Wherein, K+1 can pass through following formula
It determines:
When the symbol detection that MIMO detector completes a code word size (completes each component for sending symbol to one
Detection) after, all Soft output informations are fed back into multielement LDPC decoder.
Step 3: multielement LDPC decoder is iterated decoding and exports external information and posterior information.
By above-mentioned treatment process it is found that the embodiment of the present invention assists base by the multielement LDPC code on low-order finite domain
In the MIMO detection technique of CLSC-LMMSE.Its advantages at least that: (1) compared to the MIMO of traditional SLSC-LMMSE
The LDPC decoding scheme of detector and high-order limited domain, scheme provided in an embodiment of the present invention have lower decoding complexity and
The performance advantage of 1.5dB.(2) the multielement LDPC decoding complexity in low-order finite domain is low, and the complexity of decoder is about reduced to tradition
The 1/16 of scheme.(3) real number value is handled, and is conducive to FPGA hardware realization of High Speed.
Wherein, low-order finite domain refers to the order of finite field lower than order of modulation.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (12)
1. the signal acceptance method in a kind of mimo system characterized by comprising
Successively determine the estimated value that each component of symbol is respectively sent in transmission signal to be detected, and according to each point of transmission symbol
The estimated value of amount determines the corresponding Soft output information of each component respectively；Each component is corresponding soft defeated in one transmission symbol of every determination
Out after information, the corresponding Soft output information of each component of the transmission symbol is exported；
According to the corresponding Soft output information of each component of the transmission symbol received, the transmission symbol is decoded；
It is wherein, described successively to determine the estimated value that each component of symbol is respectively sent in transmission signal to be detected, comprising:
Based on the mode for deleting CLSC and linear minimum mean-squared error LMMSE filtering by the soft interference of component, successively determine to be detected
Send the estimated value that each component of symbol is respectively sent in signal.
2. respectively sending symbol the method according to claim 1, wherein successively determining in transmission signal to be detected
The estimated value of each component, comprising:
Determine k-th of component in transmission signal x to be detected
Wherein,It can be obtained by following formula 1:
Wherein, wkFor filter vector, ykFor the reception signal after equilibrium；
ykIt can be obtained by following formula 2:
Wherein, y is to receive signal,E(xi) it is all
The mean value of component to be detected is calculated as 1≤i≤k-1 using posterior probability, as k+1≤i≤2NtWhen, using priori
Probability calculates；
Filter vector wkIt can be obtained by following formula 3:
According to derivation, wkIt is represented by following formula 4:
Wherein, Var (xk)=0.5, hkIt is the kth column of channel matrix H,It is 2Nr×2NrUnit matrix,It is connect for MIMO
The noise variance of receipts machine, VxIt can be obtained by following formula 5:
Wherein, VxIt is the covariance matrix for sending signal x,It is by [x1,…,xk-1]TPosterior information calculation obtain
Covariance matrix,It is to pass throughThe covariance matrix that is calculated of priori probability information；And
xkDetection process in, remain VxK-th of diagonal entry be 0.5；ThereforeWithIt is all corresponding to simplify
Diagonally matrix；With covariance matrixOrI-th of diagonal entry forIt can be by as follows
Formula 6 is calculated:
Wherein,
It indicates and modulation symbol component xiQ log-likelihood ratio information of corresponding GF (Q)-LDPC code member, flag are used to table
Bright its is prior information or posterior information；By taking 16QAM is modulated as an example, each modulation symbol component is taken from 4 pulse-amplitude modulations
PAM signal, therefore Q=4, χ are the set of the point on 4PAM planisphere, χ (α) is the point on 4PAM planisphere.
3. according to the method described in claim 2, it is characterized in that, the estimated value according to each component for sending symbol is distinguished
Determine the corresponding Soft output information of each component, comprising:
Modulation symbol component x is obtained by following formula 8kCorresponding Q Soft output information:
Wherein, α ∈ GF (Q), Lext(xk=0)=0.
4. method according to claim 1 or 2, which is characterized in that each component according to the transmission symbol received is corresponding
Soft output information, the transmission symbol is decoded, comprising:
According to the corresponding Soft output information of each component of the transmission symbol received, using polynary low density parity check code LDPC
Decoder carries out LDPC decoding to the transmission symbol.
5. the signal receiving device in a kind of mimo system characterized by comprising
MIMO signal detection module, for successively determining the estimation for respectively sending each component of symbol in transmission signal to be detected
Value, and the corresponding Soft output information of each component is determined according to the estimated value for each component for sending symbol respectively；Every determination one hair
It send in symbol after the corresponding Soft output information of each component, exports the corresponding Soft output information of each component of the transmission symbol；
MIMO signal decoding module, for the corresponding Soft output information of each component according to the transmission symbol received, to described
Symbol is sent to be decoded；
Wherein, MIMO signal detection module is used for: the mode filtered based on CLSC and LMMSE, successively determines transmission letter to be detected
The estimated value of each component of symbol is respectively sent in number.
6. device according to claim 5, which is characterized in that successively determine in transmission signal to be detected and respectively send symbol
When the estimated value of each component, the MIMO signal detection module is used for:
Determine k-th of component in transmission signal x to be detected
Wherein,It can be obtained by following formula 1:
Wherein, wkFor filter vector, ykFor the reception signal after equilibrium；
ykIt can be obtained by following formula 2:
Wherein, y is to receive signal,E(xi) it is all
The mean value of component to be detected is calculated as 1≤i≤k-1 using posterior probability, as k+1≤i≤2NtWhen, using priori
Probability calculates；
Filter vector wkIt can be obtained by following formula 3:
According to derivation, wkIt is represented by following formula 4:
Wherein, Var (xk)=0.5, hkIt is the kth column of channel matrix H,It is 2Nr×2NrUnit matrix,It is connect for MIMO
The noise variance of receipts machine, VxIt can be obtained by following formula 5:
Wherein, VxIt is the covariance matrix for sending signal x,It is by [x1,…,xk-1]TPosterior information calculation obtain
Covariance matrix,It is to pass throughThe covariance matrix that is calculated of priori probability information；And
xkDetection process in, remain VxK-th of diagonal entry be 0.5；ThereforeWithIt is all corresponding to simplify
Diagonally matrix；With covariance matrixOrI-th of diagonal entry forIt can be by following public
Formula 6 is calculated:
Wherein,
It indicates and modulation symbol component xiQ log-likelihood ratio information of corresponding GF (Q)-LDPC code member, flag are used to table
Bright its is prior information or posterior information；By taking 16QAM is modulated as an example, each modulation symbol component is taken from 4 pulse-amplitude modulations
PAM signal, therefore Q=4, χ are the set of the point on 4PAM planisphere, χ (α) is the point on 4PAM planisphere.
7. device according to claim 6, which is characterized in that successively determine in transmission signal to be detected and respectively send symbol
When the estimated value of each component, the MIMO signal detection module is used for:
Modulation symbol component x is obtained by following formula 8kCorresponding Q Soft output information:
Wherein, α ∈ GF (Q), Lext(xk=0)=0.
8. device according to claim 5 or 6, which is characterized in that the MIMO signal decoding module is specifically used for:
According to the corresponding Soft output information of each component of the transmission symbol received, using multielement LDPC decoder to the transmission
Symbol carries out low density parity check code LDPC decoding.
9. a kind of mimo system, which is characterized in that including signal receiving device and sender unit；
The sender unit includes MIMO signal coding module and MIMO signal modulation module；
The MIMO signal coding module is used to encode transmission signal；
The MIMO signal modulation module is for being modulated the transmission signal after coding；
The signal receiving device includes MIMO signal detection device and MIMO signal code translator；
The MIMO signal detection device is used to successively determine the estimation that each component of symbol is respectively sent in the transmission signal
Value, and the corresponding Soft output information of each component is determined according to the estimated value for each component for sending symbol respectively；Every determination one hair
It send in symbol after the corresponding Soft output information of each component, exports the corresponding Soft output information of each component of the transmission symbol；
The MIMO signal decoding module is used for the corresponding Soft output information of each component according to the transmission symbol received, to institute
Transmission symbol is stated to be decoded；
Wherein, the MIMO signal detection device is used for:
Based on the mode that CLSC and LMMSE is filtered, each component that symbol is respectively sent in transmission signal to be detected is successively determined
Estimated value.
10. system according to claim 9, which is characterized in that the MIMO signal coding module is specifically used for:
Finite field gf (Q)-low density parity check code LDPC coding is carried out to the transmission signal；
The LDPC code member grouping that coding obtains is mapped to each modulation symbol, wherein one group of LDPC code member is respectively mapped to
Each component of one modulation symbol；
The MIMO signal modulation module is specifically used for:
It is modulated according to the LDPC code member for being mapped to modulation symbol to signal is sent, it is one group corresponding to obtain the transmission signal
Modulation symbol.
11. system according to claim 10, which is characterized in that the order of modulation of the modulation symbol is the LDPC code
The element number that the finite field of member includes.
12. system according to claim 10, which is characterized in that the MIMO signal decoding module is specifically used for:
According to the corresponding Soft output information of each component of the transmission symbol received, using multielement LDPC decoder to the transmission
Symbol carries out LDPC decoding.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1956426A (en) * | 2005-10-26 | 2007-05-02 | 电子科技大学 | MIMO interate detection method of low complexity |
| CN1976327A (en) * | 2006-12-08 | 2007-06-06 | 华为技术有限公司 | Method for counteracting minimum mean-square error soft interference, signal detector and receiver |
| CN101582742A (en) * | 2009-06-16 | 2009-11-18 | 北京邮电大学 | Method for detecting iteration of multiple input multiple output (MIMO) system, system thereof and device thereof |
| CN101883063A (en) * | 2009-05-08 | 2010-11-10 | 中兴通讯股份有限公司 | Iterative detecting method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1976327A (en) * | 2006-12-08 | 2007-06-06 | 华为技术有限公司 | Method for counteracting minimum mean-square error soft interference, signal detector and receiver |
| CN101883063A (en) * | 2009-05-08 | 2010-11-10 | 中兴通讯股份有限公司 | Iterative detecting method and device |
| CN101582742A (en) * | 2009-06-16 | 2009-11-18 | 北京邮电大学 | Method for detecting iteration of multiple input multiple output (MIMO) system, system thereof and device thereof |
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