CN101060356B - Multi-input and multi-output system signal receiving and sending method and relevant device - Google Patents

Abstract

The related signal dispatching method for MIMO system comprises: taking orthogonal transformation to 4N signal to obtain 4N transformed results; regrouping 4N results into 2N groups every with 2 results, using dual-antenna time-space code (such as Alaamounti code); transmitting the coded signal through 2N-couple antenna; wherein, every antenna continues to transmit two code signal; the receiving terminal can apply MMSE or ML algorithm. This invention makes four or more emission antenna with diversity code rate up to 2.

Description

Multi-input and multi-output system signal receiving/transmission method and R-T unit

Technical field

The present invention relates to wireless communication field, particularly multiple-input and multiple-output (Multiple InputMultiple Output is called for short " MIMO ") technology.

Background technology

Current WLAN (wireless local area network) (Wireless Local Area Network, abbreviation " WLAN ") technology is being faced with some restrictions, for example limited bandwidth and transmitting power, interference, signal attenuation, and multipath effect (causing the echo and the reflection of interference).Development along with the current situation, the future mobile communications broadband wireless moves the research topic that becomes current hot topic with the wireless access emerging system, and being people, mimo system studies one of more direction, the MIMO technology will become the effective means that addresses these problems, it can improve throughput, transmission range and the reliability of WLAN, is most important technology in the present wireless domain.

Mimo system has at double power system capacity than traditional antenna system, and signal is by a plurality of antenna transmission and the reception of transmitting terminal and receiving terminal, thereby improves each quality of services for users, for example, and bit error rate or data rate.Yet what traditional communication system adopted is single output and single input (Single-Input and Single-Output is called for short " SISO ") antenna system.In addition, the single output of many inputs (Multiple-Inputs and Single-Output based on transmit diversity and receive diversity, be called for short " MIS0 ") mode and the many output of single input (Single-Input and Multiple-Outputs, abbreviation " SIMO ") mode also belongs to is the implementation of mimo system, but real MIMO is all realized at the two ends in communication, just can obtain best effect.

Space-time code is the basis of mimo system, and the new generation of wireless communication system will plan to adopt the space-time treatment technology.People are also constantly proposing idle bit (Space-Time Coding when new or improved, be called for short " STC ") mode, to improve the performance of mimo system, reduce the complexity of space-time code system, be fit to the requirement of new generation of wireless communication system and the actual conditions of channel better.

The STC technology is an important problem, and it utilizes the two-dimensional encoded of time and space, can improve the transmission rate in the wireless channel to greatest extent, and to satisfy the technical need of new generation of wireless communication, the general structure of STC technology as shown in Figure 1.

The physical substance of STC technology is: utilize the quadrature or the accurate orthogonal property that are present between spatial domain and the time domain, according to certain design criterion, coding redundancy information evenly is mapped to the space-time two-dimension plane as far as possible, weakening the negative influence of caused space selective fading of wireless multipath transmisstion and time selective fading, thereby realize the high speed data transfer of high reliability in the wireless channel.

STC mainly comprises following four classes: (the Layered Space-Time Coding of idle bit during layering, abbreviation " LSTC "), space-time block code (Space-Time Block Coding, abbreviation " STBC "), space-time trellis code (Space-Time Trellis Coding is called for short " STTC ") and space-time " Turbo " sign indicating number etc.More complicated STC scheme is the various cascade structures of above-mentioned a few class STC, and implementation complexity and the performance of all kinds of STC have nothing in common with each other.

In addition, in order to reach high rate data transmission, transmitting terminal in mimo system and receiving terminal have all been used diversity antenna technology, and the correlation that reduces transmission path is to reach higher channel capacity.

In the middle of wireless environment, the multi-path propagation phenomenon is the main cause that causes the passage decline, and antenna diversity (Antenna Diversity) technology is the technology of typical case's opposing passage decline.Traditionally, diversity antenna technology is that processing comes from the unconnected signal that reception antenna received of many radical spaces, and these signals are to propagate through different paths (path) after the transmitting terminal emission, therefore, it is very little to adopt diversity antenna technology to receive the probability of signal of serious decline distortion simultaneously, can effectively improve the transmission quality of signal, the decline of opposing passage.

Idle bit is a simple and effective differential space-time coding when " Alamouti ", and it is applied to two transmitting antennas and a plurality of reception antenna, as shown in Figure 2, reaches code check and be 1 and the full-diversity effect, as shown in Figure 3.Wherein, the full-diversity effect is that order of diversity is a number of transmit antennas 2; Code check is defined as the ratio of symbol number and transmission time slot number.Studies show that, when number of transmit antennas greater than 2 the time, if code check be 1 and the STC scheme that can obtain the full-diversity gain be difficult to realize.

When antenna number is 2, idle bit when STC adopts " Alamouti ", as shown in Figures 2 and 3, the code check that can reach transmitting antenna is 1, and reaches the effect of full-diversity.Wherein, input signal " S ₁, S ₂... " at first by going here and there and being converted to two parallel data flow, for every couple of parallel data S ₁And S ₂, sending in two symbols He on two transmitting antennas respectively.Specifically, in two symbols of antenna 1, send data S respectively ₁And S ₂ ^*, in two symbols of antenna 2, send data S respectively ₂With-S ₁ ^*, wherein, S ₁ ^*Be S ₁Conjugation, S ₂ ^*Be S ₂Conjugation.

When antenna number is 4, adopt orthogonal space-time sign indicating number and accurate orthogonal space-time sign indicating number, wherein, the orthogonal space-time sign indicating number can reach the full-diversity effect, but code check is 3/4; And accurate orthogonal space-time sign indicating number can reach code check is 1 and the full-diversity effect, but code word is non-orthogonal.

Present transmitting antenna for four or more can't accomplish to reach the full-diversity effect simultaneously and code check equals 2.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of multi-input and multi-output system signal receiving/transmission method and R-T unit, makes that the code check of full-diversity can reach 2 for four or more transmitting antenna.

For achieving the above object, the invention provides a kind of multi-input and multi-output system signal sending method, transmitting terminal is that 1 component becomes the 2N group with 4N antenna with 2 in advance, and wherein N is the integer greater than 0;

During transmission, described transmitting terminal carries out linear transformation to sent 4N signal, and 4N the transformation results that generates is reassembled as 2N group as a result with 21 group;

To 2N group as a result, every group of idle bit when being 1 double antenna with code check respectively encoded, 2N is organized encoded signal send in turn by described 2N group antenna respectively, wherein simultaneously send 1 group of encoded signal in the time at 2 groups of antennas at per 2 symbols.

Described linear transformation can be used orthogonal transform, comprises fast Fourier transform, Hadamard transform and cosine transform etc.

Described linear transformation can divide 2 groups to carry out, and specifically comprises following steps:

A 4N to be sent signal is divided into 2 conversion groups and carries out linear transformation respectively, each conversion group generates 2N transformation results, 4N transformation results is reassembled as 2N group as a result with 21 group, wherein each as a result 2 transformation results in the group from different conversion groups.

In addition, also comprise following steps:

Earlier serial signal stream to be sent is converted to 4N parallel signal stream, from this 4N parallel signal stream, respectively gets 4N signal of 1 signal formation at every turn and carry out described linear transformation.

Idle bit when idle bit was " Alamouti " when described code check was 1 double antenna.

The present invention also provides a kind of multi-input and multi-output system signal dispensing device, comprise with 2 be 1 group 2N group antenna, with 2N group antenna 2N coding module and linear transform module one to one, wherein N is the integer greater than 0;

Described linear transform module is used for the signal linearity to be sent of 4N input is transformed into 4N transformation results, is 1 group with 2 and outputs to a described 2N coding module respectively;

Each described coding module is used for code check when being 1 double antenna, and idle bit is encoded, and outputs to 1 group of corresponding antenna;

2N group antenna sends the signal from corresponding coding module in turn, wherein simultaneously sends 1 group of encoded signal at 2 groups of antennas at per 2 symbols in the time.

Also comprising string changes and module, is used for serial signal stream to be sent is converted to 4N parallel signal stream, outputs to described linear transform module.

Described linear transformation can be orthogonal transform;

Idle bit when idle bit was " Alamouti " when described code check was 1 double antenna.

The present invention also provides a kind of multi-input and multi-output system signal method of reseptance, corresponding to above-mentioned multi-input and multi-output system signal sending method, detects the signal of being received by following formula:

$\hat{X}={(H_{\mathrm{OT}}^H{H}_{\mathrm{CH}}^H{H}_{\mathrm{CH}}{H}_{\mathrm{OT}}+{\mathrm{\σ}}_n^2{I}_n)}^{-1}{H}_{\mathrm{OT}}^H{H}_{\mathrm{CH}}^{H}R$

Wherein,

r _IjBe i the signal that reception antenna is received in symbol j, i=1,2,1≤j≤4N, N are the integer greater than 0, r _Ij ^*Represent r _IjConjugation,

Be the signal that needs detection,

Represent the estimated value of X, H _CHBe the pairing channel parameter matrix of each antenna, H _OTBe the matrix of a linear transformation of transmitting terminal,

Represent H _OTConjugate transpose,

Represent H _CHConjugate transpose,

Represent the variance of zero-mean Gaussian Profile noise, I _nThe representation unit matrix, subscript " 1 " is represented matrix inversion.

When number of transmit antennas is 4, $H_{\mathrm{CH}}=\left[\begin{array}{cccc}{h}_{11}& h_{21}& h_{31}& h_{41}\\ -{\mathrm{<figure-callout\; id="21"\; label="h"\; filenames="H06193901520060710E000101.png"\; state="\{\{state\}\}">h</figure-callout>}}_{21}^{*}& h_{11}^{*}& -h_{41}^{*}& h_{31}^{*}\\ h_{12}& h_{22}& h_{32}& h_{42}\\ -{\mathrm{<figure-callout\; id="22"\; label="h"\; filenames="H06193901520060710E000101.png,H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{22}^{*}& {\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^{*}& -h_{42}^{*}& h_{32}^{*}\end{array}\right],$

When number of transmit antennas is 8, $H_{\mathrm{CH}}=\left[\begin{array}{cccccccc}{h}_{11}& h_{21}& h_{31}& h_{41}& 0& 0& 0& 0\\ -{\mathrm{<figure-callout\; id="21"\; label="h"\; filenames="H06193901520060710E000101.png"\; state="\{\{state\}\}">h</figure-callout>}}_{21}^{*}& h_{11}^{*}& -h_{41}^{*}& h_{31}^{*}& 0& 0& 0& 0\\ h_{12}& h_{22}& h_{32}& h_{42}& 0& 0& 0& 0\\ -{\mathrm{<figure-callout\; id="22"\; label="h"\; filenames="H06193901520060710E000101.png,H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{22}^{*}& {\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^{*}& -h_{42}^{*}& h_{32}^{*}& 0& 0& 0& 0\\ 0& 0& 0& 0& h_{51}& h_{61}& h_{71}& h_{81}\\ 0& 0& 0& 0& -h_{61}^{*}& h_{51}^{*}& -h_{81}^{*}& h_{71}^{*}\\ 0& 0& 0& 0& h_{52}& h_{62}& h_{72}& h_{82}\\ 0& 0& 0& 0& -h_{62}^{*}& h_{52}^{*}& -h_{82}^{*}& h_{72}^{*}\end{array}\right],$

H wherein _TiBe transmitting antenna t and the corresponding channel parameter of reception antenna i.

Described H _OTIt is orthogonal transform matrix.

The present invention also provides a kind of signal receiving device of multi-input multi-output system, corresponding to above-mentioned multi-input and multi-output system signal dispensing device, comprises:

Two reception antennas;

String changes and module, is used for the signal r with 4N symbol of described antenna serial received _JjTransfer parallel signal output to, wherein r _IjBe i the signal that reception antenna is received in symbol j;

The conjugation processing module, being used for the parallel signal sequence number j from described string commentaries on classics and module is the r of even number _IjGet conjugation, keep the r that sequence number j is an odd number _IjConstant, result is exported as vector R; The matrix computations module is used for calculating and output matrix

The matrix multiple module obtains testing result after being used for Matrix C be multiply by vector R; Wherein, i=1,2,1≤j≤4N, N are the integer greater than 0, H _CHBe the pairing channel parameter matrix of each antenna, H _OTBe the matrix of a linear transformation of transmitting terminal,

Represent H _OTConjugate transpose,

Represent H _CHConjugate transpose,

Represent the variance of zero-mean Gaussian Profile noise, I _nThe representation unit matrix, subscript " 1 " is represented matrix inversion.

The present invention also provides another kind of multi-input and multi-output system signal method of reseptance, corresponding to above-mentioned multi-input and multi-output system signal sending method, comprises following steps:

For each possible testing result X _kCalculate its pairing z _k=(R-H _CHH _OTX _k) ^H(R-H _CHH _OTX _K);

At all Z _kMiddle search minimum value is with the pairing X of this minimum value _kExport as testing result;

Wherein, subscript " H " representative is carried out the conjugate transpose operation to matrix,

r _IjBe i the signal that reception antenna is received in symbol j, i=1,2,1≤j≤4N, N are the integer greater than 0, r _Ij ^*Represent r _IjConjugation,

Be the signal that needs detection, X _kBe the estimated value of X, H _CHBe the pairing channel parameter matrix of each antenna, H _OTIt is the matrix of a linear transformation of transmitting terminal.

When number of transmit antennas is 4, $H_{\mathrm{CH}}=\left[\begin{array}{cccc}{h}_{11}& h_{21}& h_{31}& h_{41}\\ -{\mathrm{<figure-callout\; id="21"\; label="h"\; filenames="H06193901520060710E000101.png"\; state="\{\{state\}\}">h</figure-callout>}}_{21}^{*}& h_{11}^{*}& -h_{41}^{*}& h_{31}^{*}\\ h_{12}& h_{22}& h_{32}& h_{42}\\ -{\mathrm{<figure-callout\; id="22"\; label="h"\; filenames="H06193901520060710E000101.png,H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{22}^{*}& {\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^{*}& -h_{42}^{*}& h_{32}^{*}\end{array}\right];$

When number of transmit antennas is 8, $H_{\mathrm{CH}}=\left[\begin{array}{cccccccc}{h}_{11}& h_{21}& h_{31}& h_{41}& 0& 0& 0& 0\\ -{\mathrm{<figure-callout\; id="21"\; label="h"\; filenames="H06193901520060710E000101.png"\; state="\{\{state\}\}">h</figure-callout>}}_{21}^{*}& h_{11}^{*}& -h_{41}^{*}& h_{31}^{*}& 0& 0& 0& 0\\ h_{12}& h_{22}& h_{32}& h_{42}& 0& 0& 0& 0\\ -{\mathrm{<figure-callout\; id="22"\; label="h"\; filenames="H06193901520060710E000101.png,H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{22}^{*}& {\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^{*}& -h_{42}^{*}& h_{32}^{*}& 0& 0& 0& 0\\ 0& 0& 0& 0& h_{51}& h_{61}& h_{71}& h_{81}\\ 0& 0& 0& 0& -h_{61}^{*}& h_{51}^{*}& -h_{81}^{*}& h_{71}^{*}\\ 0& 0& 0& 0& h_{52}& h_{62}& h_{72}& h_{82}\\ 0& 0& 0& 0& -h_{62}^{*}& h_{52}^{*}& -h_{82}^{*}& h_{72}^{*}\end{array}\right],$

Wherein, h _TiBe transmitting antenna t and the corresponding channel parameter of reception antenna i.

Described H _OTIt is orthogonal transform matrix.

The present invention also provides the signal receiving device of another kind of multi-input multi-output system, corresponding to above-mentioned multi-input and multi-output system signal dispensing device, comprises:

Two reception antennas;

String changes and module, is used for the signal r with 4N symbol of described antenna serial received _IjTransfer parallel signal output to, wherein r _IjBe i the signal that reception antenna is received in symbol j;

The conjugation processing module, being used for the parallel signal sequence number j from described string commentaries on classics and module is the r of even number _IjGet conjugation, keep the r that sequence number j is an odd number _IjConstant, result is exported as vector R;

The ML algoritic module is used for for each possible testing result X _kCalculate its pairing z _k=(R-H _CHH _OTX _k) ^H(R-H _CHH _OTX _K), at all Z _kMiddle search minimum value is with the pairing X of this minimum value _kExport as testing result;

Wherein, i=1,2,1≤j≤4N, N are the integer greater than 0, H _CHBe the pairing channel parameter matrix of each antenna, H _OTBe the matrix of a linear transformation of transmitting terminal, subscript " H " representative is carried out the conjugate transpose operation to matrix.

By relatively finding, the main distinction of technical scheme of the present invention and prior art is, the individual signal of 4N to be sent (N is the integer greater than 0) is carried out linear transformation, generate 4N transformation results, 4N transformation results is 1 group with 2 is reassembled as 2N group as a result, to 2N as a result each idle bit when being 1 double antenna of group (as " Alamouti " time idle bit) with code check encode, 2N is organized encoded signal to be sent antenna in turn by 2N respectively, wherein simultaneously send 1 group of encoded signal at 2 groups of antennas at every symbol in the time, every group of antenna sent out two symbols continuously.Because so idle bit encoded signals when each time period has 2 pairs of antennas to send one group of warp " Alamouti " respectively is can be so that the code check of full-diversity is 2.Carried out linear transformation because treat 4N the signal of sending out, and idle bit coding when being reassembled as 2N group and carrying out " Alamouti ", finally send into a pair of antenna emission, so each signal is all via 4N antenna transmission, have the full-diversity effect of 4N antenna, transmission performance is better.

Linear transformation also can be divided into 2 conversion groups to be carried out, 2N as a result in the group two signals of each group respectively from a conversion group.

If orthogonal transform is used in linear transformation, just can make 4N signal after the conversion have orthogonality, be convenient to when doing inverse transformation, suppress noise, thereby further promote transmission performance at receiving terminal.

Make the present invention be applicable to the transmission and the reception of serial or parallel signal flow by string and conversion.

Two kinds of method of reseptances are arranged, and a kind of based on the MMSE criterion, concrete formula is

Another kind is the ML algorithm, earlier to each possible testing result X _kCalculate its pairing Z _k=(R-H _CHH _OTX) ^H(R-H _CHH _OTX), again at all Z _kMiddle search minimum value, pairing X exports as testing result with this minimum value.The code check that can receive full-diversity efficiently by these two kinds of methods is 2 time idle bit code signal.

Description of drawings

Fig. 1 is the general structure chart of the STC technology of mimo system in the prior art;

Fig. 2 is mimo system in the prior art " Alamouti " space-time code plan schematic diagram;

Fig. 3 is an idle bit schematic diagram during according to " Alamouti " of mimo system shown in Figure 2 in the prior art;

Fig. 4 is the mimo system signaling method flow chart according to first embodiment of the invention;

Fig. 5 is the delivery plan schematic diagram according to 4 antenna systems of first embodiment of the invention;

Fig. 6 is the STC schematic diagram according to 4 antenna systems of first embodiment of the invention shown in Figure 5;

Fig. 7 is the mimo system signaling method flow chart according to second embodiment of the invention;

Fig. 8 is the STC scheme schematic diagram according to 4 antenna systems of second embodiment of the invention;

Fig. 9 is the mimo system signaling method flow chart according to third embodiment of the invention;

Figure 10 is the STC scheme schematic diagram according to 8 antenna systems of third embodiment of the invention;

Figure 11 is the STC schematic diagram according to 8 antenna systems of third embodiment of the invention shown in Figure 10;

Figure 12 is the mimo system signaling method flow chart according to four embodiment of the invention;

Figure 13 is the STC scheme schematic diagram according to 8 antenna systems of four embodiment of the invention;

Figure 14 is the mimo system sender unit structure chart according to fifth embodiment of the invention;

Figure 15 is the signal receiving device structure chart according to the mimo system of seventh embodiment of the invention;

Figure 16 is the signal receiving device structure chart according to the mimo system of tenth embodiment of the invention.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.

The present invention proposes a kind of code check that is used for four or more transmitting antenna and be 2 and reach the space-time code scheme of full-diversity, the signal that at first will need to send carries out linear transformation respectively, per 2 of signal after the conversion is formed one group, idle bit coding back is by a pair of antenna output when being 1 double antenna by code check, wherein, at 2 group antennas send 1 group encoded signal simultaneously at per 2 symbols in the time.Adopt decoding and the inverse transformation corresponding at receiving terminal, obtain the signal that is transmitted with transmitting terminal.

The mimo system signaling method of first embodiment of the invention as shown in Figure 4.Setting in advance 4N transmitting antenna, is that 1 component becomes the 2N group with 4N antenna with 2, and wherein N is the integer greater than 0.When N=1,4 transmitting antenna antennas 1 and antenna 2 are that one group, antenna 3 and antenna 4 are one group, and the STC scheme of this mimo system as shown in Figure 5.

In step 401, the transmitting terminal of mimo system is 4 in the serial signal stream to be sent (4N) serial signals, for example, and signal X ₁, X ₂, X ₃And X ₄, after string and conversion, obtaining the parallel signal of corresponding 4 signal parallels, per 4 of follow-up signal is similarly changed, and obtains parallel signal stream.Change and make the present invention be applicable to the transmission of serial signal stream by string.

In step 402,4 parallel signals in each parallel signal stream are divided into 2 conversion groups, for example, X ₁And X ₂Be first group, X ₃, X ₄It is second group.

In step 403, two groups of signals are carried out linear transformation respectively, each conversion group generates 2 transformation results.Wherein, first group signal X ₁And X ₂Transformation results be S ₁And S ₃Second group signal X ₃And X ₄The transformation results that obtains is S ₂And S ₄Each as a result in the group two signals of each group respectively from a conversion group.

Wherein, the linear transformation of being carried out is if orthogonal transform, for example fast Fourier transform (Fast FourierTransform, abbreviation " FFT "), Hadamard transform (Hadamard Transform), cosine transform etc., just can make the signal code word quadrature that sends, thereby further promote transmission performance, also make and carry out inverse transformation picked up signal X at receiving terminal ₁, X ₂... X ₄The time good performance arranged.

With the Hadamard transform is example, and transformation results is:

${\mathrm{<figure-callout\; id="1"\; label="S"\; filenames="H06193901520060710E000012.png,H06193901520060710E000013.png"\; state="\{\{state\}\}">S</figure-callout>}}_1=({\mathrm{<figure-callout\; id="1"\; label="X"\; filenames="H06193901520060710E000012.png,H06193901520060710E000013.png"\; state="\{\{state\}\}">X</figure-callout>}}_1+X_2)/\sqrt{2},$ ${\mathrm{<figure-callout\; id="3"\; label="S"\; filenames="H06193901520060710E000013.png,H06193901520060710E000092.png"\; state="\{\{state\}\}">S</figure-callout>}}_3=(X_1-X_2)/\sqrt{2},$ ${\mathrm{<figure-callout\; id="2"\; label="S"\; filenames="H06193901520060710E000013.png"\; state="\{\{state\}\}">S</figure-callout>}}_2=({\mathrm{<figure-callout\; id="3"\; label="X"\; filenames="H06193901520060710E000013.png,H06193901520060710E000092.png"\; state="\{\{state\}\}">X</figure-callout>}}_3+X_4)/\sqrt{2},$ ${\mathrm{<figure-callout\; id="4"\; label="S"\; filenames="H06193901520060710E000013.png,H06193901520060710E000071.png"\; state="\{\{state\}\}">S</figure-callout>}}_4=(X_3$ $-X_4)/\sqrt{2}.$

In step 404, two groups of resulting 4 transformation results of signal are reassembled as 2 groups as a result, S with 21 group ₁And S ₂Form first group as a result, S ₃And S ₄Form second group as a result.Principle during reorganization be each as a result 2 transformation results in the group require from different conversion groups.

In step 405, idle bit was encoded when group was 1 double antenna with code check respectively as a result to these two, for example, and idle bit when " Alamouti ".

In step 406, the signal when two groups of transmitting antennas are 1 double antenna with these two groups through code checks respectively behind the idle bit coding is 2 symbols of emission continuously, and the STC that these 4 transmitting antennas are exported as shown in Figure 6.Because so idle bit encoded signals when each time period has 2 pairs of antennas to send one group of warp " Alamouti " respectively is can be so that the code check of full-diversity is 2.Carried out linear transformation because treat 4 signals sending out, and idle bit coding when being reassembled as the N group and carrying out " Alamouti ", finally send into a pair of antenna emission, for example, S ₁And S ₂By a pair of antenna transmission, S3 and S4 by another to antenna transmission, and

So X ₁, X ₂, X ₃And X ₄In each signal all be via each antenna transmission of 4N antenna, have the full-diversity effect of 4N antenna, transmission performance is better.

The mimo system signaling method of second embodiment of the invention as shown in Figure 7.Setting in advance 4N transmitting antenna, is that 1 component becomes the 2N group with 4N antenna with 2, and wherein N is the integer greater than 0.When N=1,4 transmitting antenna antennas 1 and antenna 2 are that one group, antenna 3 and antenna 4 are one group, and the STC scheme of this mimo system as shown in Figure 8.

In step 701, the transmitting terminal of mimo system is 4 in the serial signal stream to be sent (4N) serial signals, for example, and signal X ₁, X ₂, X ₃And X ₄, after string and conversion, obtaining the parallel signal of corresponding 4 signal parallels, per 4 of follow-up signal is similarly changed, and obtains parallel signal stream.Change and make the present invention be applicable to the transmission of serial signal stream by string.

In step 702,4 parallel signals in each parallel signal stream are carried out linear transformation respectively the transformation results that generates is divided into 2 transformation results groups, wherein, signal X ₁And X ₂Transformation results be first group S ₁And S ₃Signal X ₃And X ₄The transformation results that obtains is second group S ₂And S ₄

Wherein, the linear transformation of being carried out is if orthogonal transform, for example fast Fourier transform (Fast FourierTransform, abbreviation " FFT "), Hadamard transform (Hadamard Transform), cosine transform etc., just can make the signal code word quadrature that sends, thereby further promote transmission performance, also make and carry out inverse transformation picked up signal X at receiving terminal ₁, X ₂... X ₄The time good performance arranged.

With the Hadamard transform is example, and transformation results is:

${\mathrm{<figure-callout\; id="1"\; label="S"\; filenames="H06193901520060710E000012.png,H06193901520060710E000013.png"\; state="\{\{state\}\}">S</figure-callout>}}_1=({\mathrm{<figure-callout\; id="1"\; label="X"\; filenames="H06193901520060710E000012.png,H06193901520060710E000013.png"\; state="\{\{state\}\}">X</figure-callout>}}_1+X_2)/\sqrt{2},$ ${\mathrm{<figure-callout\; id="3"\; label="S"\; filenames="H06193901520060710E000013.png,H06193901520060710E000092.png"\; state="\{\{state\}\}">S</figure-callout>}}_3=(X_1-X_2)/\sqrt{2},$ ${\mathrm{<figure-callout\; id="2"\; label="S"\; filenames="H06193901520060710E000013.png"\; state="\{\{state\}\}">S</figure-callout>}}_2=({\mathrm{<figure-callout\; id="3"\; label="X"\; filenames="H06193901520060710E000013.png,H06193901520060710E000092.png"\; state="\{\{state\}\}">X</figure-callout>}}_3+X_4)/\sqrt{2},$ ${\mathrm{<figure-callout\; id="4"\; label="S"\; filenames="H06193901520060710E000013.png,H06193901520060710E000071.png"\; state="\{\{state\}\}">S</figure-callout>}}_4=({\mathrm{<figure-callout\; id="3"\; label="X"\; filenames="H06193901520060710E000013.png,H06193901520060710E000092.png"\; state="\{\{state\}\}">X</figure-callout>}}_3$

$-X_4)/\sqrt{2}.$

Step 703 is similar to step 406 with step 404 respectively to step 705, does not repeat them here.

The mimo system signaling method of third embodiment of the invention as shown in Figure 9, when N=2,8 (4N) transmitting antenna antennas 1 and antenna 2 are that one group, antenna 3 and antenna 4 are that one group, antenna 5 and antenna 6 are that one group, antenna 7 and antenna 8 are one group, and the STC scheme of this mimo system as shown in figure 10.

In step 901, the transmitting terminal of mimo system is 8 in the serial signal stream to be sent (4N) serial signals, for example, and signal X ₁, X ₂... X ₈, after string and conversion, obtaining the parallel signal of corresponding 8 signal parallels, per 8 of follow-up signal is similarly changed, and obtains parallel signal stream.Change and make the present invention be applicable to the transmission of serial signal stream by string.

In step 902,8 parallel signals in each parallel signal stream are divided into 2 conversion groups, for example, X ₁, X ₂, X ₃And X ₄Be first group, X ₅, X ₆, X ₇And X ₈It is second group.

In step 903, two groups of signals are carried out linear transformation respectively, each conversion group generates 4 transformation results.Wherein, first group signal X ₁, X ₂, X ₃And X ₄Transformation results be S ₁, S ₃, S ₅And S ₇Second group signal X ₅, X ₆, X ₇And X ₈The transformation results that obtains is S ₂, S ₄, S ₆And S ₈

Wherein, the linear transformation of being carried out is orthogonal transform, for example FFT, Hadamard transform or sine transform etc.

In step 904, two groups of resulting 8 transformation results of signal are reassembled as 4 groups as a result, S with 21 group ₁And S ₂Form first group as a result, S ₃And S ₄Form second group as a result, S ₅And S ₆Form the 3rd group as a result, S ₇And S ₈Form the 4th group as a result.Principle during reorganization be each as a result 2 transformation results in the group require from different conversion groups.

In step 905, idle bit was encoded when group was 1 double antenna with code check respectively as a result to these 4, for example, and idle bit when " Alamouti ".

In step 906, the signal when 4 groups of transmitting antennas are 1 double antenna with these 4 groups through code checks respectively behind the idle bit coding sends in turn, and wherein, per 2 groups of antennas are 2 symbols of emission continuously, and the STC that these 8 transmitting antennas are exported as shown in figure 11.Equally, the signal behind the coding does not on the same group send in different antenna sets and different time, does not therefore disturb each other.

The mimo system signaling method of four embodiment of the invention as shown in figure 12, when N=2,8 (4N) transmitting antenna antennas 1 and antenna 2 are that one group, antenna 3 and antenna 4 are that one group, antenna 5 and antenna 6 are that one group, antenna 7 and antenna 8 are one group, and the STC scheme of this mimo system as shown in figure 13.

In step 1201, the transmitting terminal of mimo system is 8 in the serial signal stream to be sent (4N) serial signals, for example, and signal X ₁, X ₂... X ₈, after string and conversion, obtaining the parallel signal of corresponding 8 signal parallels, per 8 of follow-up signal is similarly changed, and obtains parallel signal stream.Change and make the present invention be applicable to the transmission of serial signal stream by string.

In step 1202,8 parallel signals in each parallel signal stream are carried out linear transformation respectively, transformation results is divided into 2 transformation results groups, for example, signal X ₁, X ₂, X ₃And X ₄The first transformation results group be S ₁, S ₃, S ₅And S ₇Signal X ₅, X ₆, X ₇And X ₈The second transformation results group that obtains is S ₂, S ₄, S ₆And S ₈

Wherein, the linear transformation of being carried out is orthogonal transform, for example FFT, Hadamard transform or sine transform etc.

Step 1203 step 1205 is similar to step 906 with step 904 respectively, repeats no more herein.

The mimo system sender unit of fifth embodiment of the invention as shown in figure 14.Wherein, comprise with 2 be 1 group 2N group antenna, with 2N group antenna 2N coding module and linear transform module one to one, also comprising string changes also module, wherein N is the integer greater than 0.

Specifically, string changes and module, is used for serial signal stream to be sent is converted to 4N parallel signal stream, outputs to linear transform module; Each linear transform module is used for the signal linearity to be sent of 4N input is transformed into 4N transformation results, is 1 group with 2 and outputs to 2N coding module respectively; Each coding module is used for code check when being 1 double antenna, and idle bit is encoded, for example, and idle bit when " Alamouti ", and output to 1 group of corresponding antenna; And 2N group antenna sends the signal from corresponding coding module in turn, wherein simultaneously sends 1 group of encoded signal at 2 groups of antennas at per 2 symbols in the time.

Wherein, linear transformation is orthogonal transform, for example, and FFT, Hadamard transform or cosine transform etc.

The mimo system of sixth embodiment of the invention comprises four transmitting antennas and two reception antennas, is used to receive the signal that first and second execution modes are launched.Suppose that four transmitting antennas and two pairing channels of reception antenna are h _TR, T is a T transmitting antenna here, and R is a R reception antenna, and the signal of two interior two reception antennas of symbol can be expressed as so:

$\left\{\begin{array}{c}{r}_{11}=h_{11}{\mathrm{<figure-callout\; id="1"\; label="s"\; filenames="H06193901520060710E000012.png,H06193901520060710E000013.png"\; state="\{\{state\}\}">s</figure-callout>}}_1+h_{21}{\mathrm{<figure-callout\; id="2"\; label="s"\; filenames="H06193901520060710E000013.png"\; state="\{\{state\}\}">s</figure-callout>}}_2+h_{31}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000092.png"\; state="\{\{state\}\}">s</figure-callout>}}_3+h_{41}{\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000071.png"\; state="\{\{state\}\}">s</figure-callout>}}_4+n_{11}\\ {\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}=h_{11}{\mathrm{<figure-callout\; id="2"\; label="s"\; filenames="H06193901520060710E000013.png"\; state="\{\{state\}\}">s</figure-callout>}}_2^{*}-h_{21}{\mathrm{<figure-callout\; id="1"\; label="s"\; filenames="H06193901520060710E000012.png,H06193901520060710E000013.png"\; state="\{\{state\}\}">s</figure-callout>}}_1^{*}+h_{31}{\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000071.png"\; state="\{\{state\}\}">s</figure-callout>}}_4^{*}-h_{41}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000092.png"\; state="\{\{state\}\}">s</figure-callout>}}_3^{*}+n_{12}\\ {\mathrm{<figure-callout\; id="21"\; label="r"\; filenames="H06193901520060710E000101.png"\; state="\{\{state\}\}">r</figure-callout>}}_{21}=h_{12}{\mathrm{<figure-callout\; id="1"\; label="s"\; filenames="H06193901520060710E000012.png,H06193901520060710E000013.png"\; state="\{\{state\}\}">s</figure-callout>}}_1+h_{22}{\mathrm{<figure-callout\; id="2"\; label="s"\; filenames="H06193901520060710E000013.png"\; state="\{\{state\}\}">s</figure-callout>}}_2+h_{32}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000092.png"\; state="\{\{state\}\}">s</figure-callout>}}_3+h_{42}{\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000071.png"\; state="\{\{state\}\}">s</figure-callout>}}_4+n_{21}\\ {\mathrm{<figure-callout\; id="22"\; label="r"\; filenames="H06193901520060710E000101.png,H06193901520060710E000102.png"\; state="\{\{state\}\}">r</figure-callout>}}_{22}=h_{12}{\mathrm{<figure-callout\; id="2"\; label="s"\; filenames="H06193901520060710E000013.png"\; state="\{\{state\}\}">s</figure-callout>}}_2^{*}-h_{22}{\mathrm{<figure-callout\; id="1"\; label="s"\; filenames="H06193901520060710E000012.png,H06193901520060710E000013.png"\; state="\{\{state\}\}">s</figure-callout>}}_1^{*}+h_{32}{\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000071.png"\; state="\{\{state\}\}">s</figure-callout>}}_4^{*}-h_{42}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000092.png"\; state="\{\{state\}\}">s</figure-callout>}}_3^{*}+n_{22}\end{array}\right.---\left(1\right)$

Here r ₁₁Be the received signal of first reception antenna in first symbol; r ₁₂Be the received signal of first reception antenna in second symbol; r ₂₁Be the received signal of second reception antenna in first symbol; r ₂₂Be the received signal of second reception antenna in second symbol; n ₁₁, n ₁₂, n ₂₁, n ₂₂Be the noise samples value, suppose it all is Gaussian Profile, zero-mean and identical variance

Following formula can further be expressed as:

$\left[\begin{array}{c}{r}_{11}\\ {\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}^{*}\\ r_{21}\\ {\mathrm{<figure-callout\; id="22"\; label="r"\; filenames="H06193901520060710E000101.png,H06193901520060710E000102.png"\; state="\{\{state\}\}">r</figure-callout>}}_{22}^{*}\end{array}\right]=\left[\begin{array}{cccc}{h}_{11}& h_{21}& h_{31}& h_{41}\\ {-\mathrm{<figure-callout\; id="21"\; label="h"\; filenames="H06193901520060710E000101.png"\; state="\{\{state\}\}">h</figure-callout>}}_{21}^{*}& h_{11}^{*}& {-h}_{41}^{*}& h_{31}^{*}\\ h_{12}& h_{22}& h_{32}& h_{42}\\ {-\mathrm{<figure-callout\; id="22"\; label="h"\; filenames="H06193901520060710E000101.png,H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{22}^{*}& {\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^{*}& {-h}_{42}^{*}& h_{32}^{*}\end{array}\right]\left[\begin{array}{c}{s}_1\\ s_2\\ s_3\\ {\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000071.png"\; state="\{\{state\}\}">s</figure-callout>}}_4\end{array}\right]+\left[\begin{array}{c}{n}_{11}\\ {\mathrm{<figure-callout\; id="12"\; label="n"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">n</figure-callout>}}_{12}^{*}\\ n_{21}\\ {\mathrm{<figure-callout\; id="22"\; label="n"\; filenames="H06193901520060710E000101.png,H06193901520060710E000102.png"\; state="\{\{state\}\}">n</figure-callout>}}_{22}^{*}\end{array}\right]---\left(2\right)$

Suppose linear transformation (being typically orthogonal transform), we have:

R＝H _CHH _OTX+N (3)

Here, $R=\left[\begin{array}{c}{r}_{11}\\ {\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}^{*}\\ r_{21}\\ {\mathrm{<figure-callout\; id="22"\; label="r"\; filenames="H06193901520060710E000101.png,H06193901520060710E000102.png"\; state="\{\{state\}\}">r</figure-callout>}}_{22}^{*}\end{array}\right],$ $X=\left[\begin{array}{c}{x}_1\\ x_2\\ x_3\\ x_4\end{array}\right],$ $N=\left[\begin{array}{c}{n}_{11}\\ {\mathrm{<figure-callout\; id="12"\; label="n"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">n</figure-callout>}}_{12}^{*}\\ n_{21}\\ {\mathrm{<figure-callout\; id="22"\; label="n"\; filenames="H06193901520060710E000101.png,H06193901520060710E000102.png"\; state="\{\{state\}\}">n</figure-callout>}}_{22}^{*}\end{array}\right],$ $H_{\mathrm{OT}}=\left[\begin{array}{cccc}{w}_{11}& w_{12}& w_{13}& w_{14}\\ w_{21}& w_{22}& w_{23}& w_{24}\\ w_{31}& w_{32}& w_{33}& w_{34}\\ w_{41}& w_{42}& w_{43}& w_{44}\end{array}\right],$ $H_{\mathrm{CH}}=\left[\begin{array}{cccc}{h}_{11}& h_{21}& h_{31}& h_{41}\\ {-\mathrm{<figure-callout\; id="21"\; label="h"\; filenames="H06193901520060710E000101.png"\; state="\{\{state\}\}">h</figure-callout>}}_{21}^{*}& h_{11}^{*}& {-h}_{41}^{*}& h_{31}^{*}\\ h_{12}& h_{22}& h_{32}& h_{42}\\ {-\mathrm{<figure-callout\; id="22"\; label="h"\; filenames="H06193901520060710E000101.png,H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{22}^{*}& {\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^{*}& {-h}_{42}^{*}& h_{32}^{*}\end{array}\right],$ $H_{\mathrm{OT}}=\left[\begin{array}{cccc}{w}_{11}& w_{12}& w_{13}& w_{14}\\ w_{21}& w_{22}& w_{23}& w_{24}\\ w_{31}& w_{32}& w_{33}& w_{34}\\ w_{41}& w_{42}& w_{43}& w_{44}\end{array}\right].$

Estimate the receiver of (Minimum mean-square error is called for short " MMSE ") criterion based on Minimum Mean Square Error, be the detection of signal:

$\hat{X}={(H_{\mathrm{OT}}^H{H}_{\mathrm{CH}}^H{H}_{\mathrm{CH}}{H}_{\mathrm{OT}}+{\mathrm{\&sigma;}}_n^2{I}_n)}^{-1}{H}_{\mathrm{OT}}^H{H}_{\mathrm{CH}}^{H}R---\left(4\right)$

Here,

Be the signal that needs detection,

Represent the estimated value of X; H _CHIt is the pairing channel parameter matrix of each antenna; H _OTBeing the matrix of a linear transformation of transmitting terminal, for example, is orthogonal transform matrix,

Represent H _OTConjugate transpose;

Represent H _CHConjugate transpose; Subscript " 1 " representative is to matrix inversion.The code check that can receive full-diversity efficiently by said method is 2 time idle bit code signal.

The mimo system of seventh embodiment of the invention is the signal receiving device at four transmitting antennas and two reception antennas, as shown in figure 15, is used to receive the signal that first and second execution modes are sent.Wherein, comprise: two reception antennas, strings change also module, conjugation processing module, matrix computations module and matrix multiple module.

Wherein, string commentaries on classics and module are used for the signal r with 4N symbol of antenna serial received _IjTransfer parallel signal output to, wherein r _IjBe i the signal that reception antenna is received in symbol j, i=1,2,1≤j≤4N, N are the integer greater than 0.For example, the signal r that antenna 1 is received ₁₁, r ₁₂, r ₁₃... and the signal r that received of antenna 2 ₂₁, r ₂₂, r ₂₃..., convert 4 signal parallel outputs to, obtain parallel signal r ₁₁, r ₁₂, r ₂₁, r ₂₂

It is the r of even number that the conjugation processing module is used for the parallel signal sequence number j from string commentaries on classics and module _IjGet conjugation, keep the r that sequence number j is an odd number _IjConstant, result is exported as vector R.For parallel signal r ₁₁, r ₁₂, r ₂₁, r ₂₂, with r ₁₂And r ₂₂Get conjugation, obtain respectively

With

The matrix computations module is used for calculating and output matrix

Wherein, H _CHBe the pairing channel parameter matrix of each antenna,

H _OTBe the matrix of a linear transformation of transmitting terminal,

Represent H _OTConjugate transpose,

Represent H _CHConjugate transpose,

Represent the variance of zero-mean Gaussian Profile noise, subscript " 1 " is represented matrix inversion.

The matrix multiple module obtains testing result after then being used for Matrix C be multiply by vector R.

The mimo system of eighth embodiment of the invention comprises eight transmitting antennas and two reception antennas, is used to receive the signal that third and fourth execution mode is launched.Suppose that eight transmitting antennas and two pairing channels of reception antenna are h _TR, T is a T transmitting antenna here, and R is a R reception antenna, and the signal of eight interior two reception antennas of symbol can be expressed as so:

$\left\{\begin{array}{c}{r}_{11}=h_{11}{\mathrm{<figure-callout\; id="1"\; label="s"\; filenames="H06193901520060710E000012.png,H06193901520060710E000013.png"\; state="\{\{state\}\}">s</figure-callout>}}_1+h_{21}{\mathrm{<figure-callout\; id="2"\; label="s"\; filenames="H06193901520060710E000013.png"\; state="\{\{state\}\}">s</figure-callout>}}_2+h_{31}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000092.png"\; state="\{\{state\}\}">s</figure-callout>}}_3+h_{41}{\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000071.png"\; state="\{\{state\}\}">s</figure-callout>}}_4+n_{11}\\ {\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}=h_{11}{\mathrm{<figure-callout\; id="2"\; label="s"\; filenames="H06193901520060710E000013.png"\; state="\{\{state\}\}">s</figure-callout>}}_2^{*}-h_{21}{\mathrm{<figure-callout\; id="1"\; label="s"\; filenames="H06193901520060710E000012.png,H06193901520060710E000013.png"\; state="\{\{state\}\}">s</figure-callout>}}_1^{*}+h_{31}{\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000071.png"\; state="\{\{state\}\}">s</figure-callout>}}_4^{*}-h_{41}{\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000071.png"\; state="\{\{state\}\}">s</figure-callout>}}_4^{*}+n_{12}\\ {\mathrm{<figure-callout\; id="21"\; label="r"\; filenames="H06193901520060710E000101.png"\; state="\{\{state\}\}">r</figure-callout>}}_{21}=h_{12}{\mathrm{<figure-callout\; id="1"\; label="s"\; filenames="H06193901520060710E000012.png,H06193901520060710E000013.png"\; state="\{\{state\}\}">s</figure-callout>}}_1+h_{22}{\mathrm{<figure-callout\; id="2"\; label="s"\; filenames="H06193901520060710E000013.png"\; state="\{\{state\}\}">s</figure-callout>}}_2+h_{32}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000092.png"\; state="\{\{state\}\}">s</figure-callout>}}_3+h_{42}{\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000071.png"\; state="\{\{state\}\}">s</figure-callout>}}_4+n_{21}\\ {\mathrm{<figure-callout\; id="22"\; label="r"\; filenames="H06193901520060710E000101.png,H06193901520060710E000102.png"\; state="\{\{state\}\}">r</figure-callout>}}_{22}=h_{12}{\mathrm{<figure-callout\; id="2"\; label="s"\; filenames="H06193901520060710E000013.png"\; state="\{\{state\}\}">s</figure-callout>}}_2^{*}-h_{22}{\mathrm{<figure-callout\; id="1"\; label="s"\; filenames="H06193901520060710E000012.png,H06193901520060710E000013.png"\; state="\{\{state\}\}">s</figure-callout>}}_1^{*}+h_{32}{\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000071.png"\; state="\{\{state\}\}">s</figure-callout>}}_4^{*}-h_{42}{\mathrm{<figure-callout\; id="3"\; label="s"\; filenames="H06193901520060710E000013.png,H06193901520060710E000092.png"\; state="\{\{state\}\}">s</figure-callout>}}_3^{*}+n_{22}\\ r_{13}=h_{51}{\mathrm{<figure-callout\; id="5"\; label="s"\; filenames="H06193901520060710E000091.png"\; state="\{\{state\}\}">s</figure-callout>}}_5+h_{61}{s}_6+h_{71}{s}_7+h_{81}{s}_8+n_{13}\\ r_{14}=h_{51}{s}_6^{*}-h_{61}{\mathrm{<figure-callout\; id="5"\; label="s"\; filenames="H06193901520060710E000091.png"\; state="\{\{state\}\}">s</figure-callout>}}_5^{*}+h_{71}{s}_8^{*}+h_{81}{s}_7^{*}+n_{14}\\ {\mathrm{<figure-callout\; id="23"\; label="r"\; filenames="H06193901520060710E000101.png,H06193901520060710E000102.png"\; state="\{\{state\}\}">r</figure-callout>}}_{23}=h_{51}{\mathrm{<figure-callout\; id="5"\; label="s"\; filenames="H06193901520060710E000091.png"\; state="\{\{state\}\}">s</figure-callout>}}_5+h_{61}{s}_6+h_{71}{s}_7+h_{81}{s}_8+n_{23}\\ r_{24}=h_{51}{s}_6^{*}-{h_{61}}^{}{\mathrm{<figure-callout\; id="5"\; label="s"\; filenames="H06193901520060710E000091.png"\; state="\{\{state\}\}">s</figure-callout>}}_5^{*}+h_{71}{s}_8^{*}-h_{81}{s}_7^{*}+n_{24}\end{array}\right.---\left(5\right)$

Here r _1kBe the received signal of first reception antenna in k symbol; r _2kBe the received signal of second reception antenna in k symbol; n _1kAnd n _2kBe respectively first reception antenna and the noise samples value of first reception antenna in k symbol, suppose it all is Gaussian Profile, zero-mean and identical variance

Following formula can further be expressed as:

$\left[\begin{array}{c}{r}_{11}\\ {\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}^{*}\\ r_{11}\\ {\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}^{*}\\ r_{13}\\ r_{14}^{*}\\ r_{23}\\ r_{24}^{*}\end{array}\right]=\left[\begin{array}{cccccccc}{h}_{11}& h_{21}& h_{31}& h_{41}& 0& 0& 0& 0\\ {-\mathrm{<figure-callout\; id="21"\; label="h"\; filenames="H06193901520060710E000101.png"\; state="\{\{state\}\}">h</figure-callout>}}_{21}^{*}& h_{11}^{*}& {-h}_{41}^{*}& h_{31}^{*}& 0& 0& 0& 0\\ h_{12}& h_{22}& h_{32}& h_{42}& 0& 0& 0& 0\\ -{\mathrm{<figure-callout\; id="22"\; label="h"\; filenames="H06193901520060710E000101.png,H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{22}^{*}& {\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^{*}& {-h}_{42}^{*}& h_{32}^{*}& 0& 0& 0& 0\\ 0& 0& 0& 0& h_{51}& h_{61}& h_{71}& h_{81}\\ 0& 0& 0& 0& {-h}_{61}^{*}& h_{51}^{*}& {-h}_{81}^{*}& h_{71}^{*}\\ 0& 0& 0& 0& h_{52}& h_{62}& h_{72}& h_{82}\\ 0& 0& 0& 0& {-h}_{62}^{*}& h_{52}^{*}& {-h}_{82}^{*}& h_{72}^{*}\end{array}\right]\left[\begin{array}{c}{s}_1\\ s_2\\ s_3\\ s_4\\ s_5\\ s_6\\ s_7\\ s_8\end{array}\right]+\left[\begin{array}{c}{n}_{11}\\ {\mathrm{<figure-callout\; id="12"\; label="n"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">n</figure-callout>}}_{12}^{*}\\ n_{11}\\ {\mathrm{<figure-callout\; id="12"\; label="n"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">n</figure-callout>}}_{12}^{*}\\ n_{13}\\ n_{14}^{*}\\ n_{23}\\ n_{24}^{*}\end{array}\right]---\left(6\right)$

Suppose linear transformation (being typically orthogonal transform), we get:

R＝H _CHH _OTX+N (7)

Here, $R=\left[\begin{array}{c}{r}_{11}\\ {\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}^{*}\\ r_{11}\\ {\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}^{*}\\ r_{13}\\ r_{14}^{*}\\ r_{23}\\ r_{24}^{*}\end{array}\right],$ $N=\left[\begin{array}{c}{n}_{11}\\ {\mathrm{<figure-callout\; id="12"\; label="n"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">n</figure-callout>}}_{12}^{*}\\ n_{11}\\ {\mathrm{<figure-callout\; id="12"\; label="n"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">n</figure-callout>}}_{12}^{*}\\ n_{13}\\ n_{14}^{*}\\ n_{23}\\ n_{24}^{*}\end{array}\right],$ $\begin{array}{}\end{array}{H}_{\mathrm{CH}}=\left[\begin{array}{cccccccc}{h}_{11}& h_{21}& h_{31}& h_{41}& 0& 0& 0& 0\\ {-\mathrm{<figure-callout\; id="21"\; label="h"\; filenames="H06193901520060710E000101.png"\; state="\{\{state\}\}">h</figure-callout>}}_{21}^{*}& h_{11}^{*}& {-h}_{41}^{*}& h_{31}^{*}& 0& 0& 0& 0\\ h_{12}& h_{22}& h_{32}& h_{42}& 0& 0& 0& 0\\ -{\mathrm{<figure-callout\; id="22"\; label="h"\; filenames="H06193901520060710E000101.png,H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{22}^{*}& {\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^{*}& {-h}_{42}^{*}& h_{32}^{*}& 0& 0& 0& 0\\ 0& 0& 0& 0& h_{51}& h_{61}& h_{71}& h_{81}\\ 0& 0& 0& 0& {-h}_{61}^{*}& h_{51}^{*}& {-h}_{81}^{*}& h_{71}^{*}\\ 0& 0& 0& 0& h_{52}& h_{62}& h_{72}& h_{82}\\ 0& 0& 0& 0& {-h}_{62}^{*}& h_{52}^{*}& {-h}_{82}^{*}& h_{72}^{*}\end{array}\right],$

$H_{\mathrm{OT}}=\left[\begin{array}{cccccccc}{w}_{11}& w_{12}& w_{13}& w_{14}& w_{15}& w_{16}& w_{17}& w_{18}\\ w_{21}& w_{22}& w_{23}& w_{24}& w_{25}& w_{26}& w_{27}& w_{28}\\ w_{31}& w_{32}& w_{33}& w_{34}& w_{35}& w_{36}& w_{37}& w_{38}\\ w_{41}& w_{42}& w_{43}& w_{44}& w_{45}& w_{46}& w_{47}& w_{48}\\ w_{51}& w_{52}& w_{53}& w_{54}& w_{55}& w_{56}& w_{57}& w_{58}\\ w_{61}& w_{62}& w_{63}& w_{64}& w_{65}& w_{66}& w_{67}& w_{68}\\ w_{71}& w_{72}& w_{73}& w_{74}& w_{75}& w_{76}& w_{77}& w_{78}\\ w_{81}& w_{82}& w_{83}& w_{84}& w_{85}& w_{86}& w_{87}& w_{88}\end{array}\right]$

Based on the receiver of MMSE criterion, be to the detection of signal:

$\hat{X}={(H_{\mathrm{OT}}^H{H}_{\mathrm{CH}}^H{H}_{\mathrm{CH}}{H}_{\mathrm{OT}}+{\mathrm{\&sigma;}}_n^2{I}_n)}^{-1}{H}_{\mathrm{OT}}^H{H}_{\mathrm{CH}}^{H}R---\left(8\right)$

The mimo system signal acceptance method of ninth embodiment of the invention passes through for each possible testing result X _kCalculate its pairing Z _k=(R-H _CHH _OTX) ^H(R-H _CHH _OTX), then, at all Z _kMiddle search minimum value, pairing X exports as testing result with this minimum value.The code check that also can receive full-diversity by this method efficiently is 2 time idle bit code signal.

Wherein, subscript " H " representative is carried out the conjugate transpose operation to matrix,

r _IjBe i the signal that reception antenna is received in symbol j, i=1,2,1≤j≤4N, N are the integer greater than 0, r _Ij ^*Represent r _IjConjugation,

Be the signal that needs detection, H _CHBe the pairing channel parameter matrix of each antenna, H _OTBe the matrix of a linear transformation of transmitting terminal, for example, orthogonal transform matrix.

When number of transmit antennas is 4, $H_{\mathrm{CH}}=\left[\begin{array}{cccc}{h}_{11}& h_{21}& h_{31}& h_{41}\\ {-\mathrm{<figure-callout\; id="21"\; label="h"\; filenames="H06193901520060710E000101.png"\; state="\{\{state\}\}">h</figure-callout>}}_{21}^{*}& h_{11}^{*}& {-h}_{41}^{*}& h_{31}^{*}\\ h_{12}& h_{22}& h_{32}& h_{42}\\ {-\mathrm{<figure-callout\; id="22"\; label="h"\; filenames="H06193901520060710E000101.png,H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{22}^{*}& {\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="H06193901520060710E000102.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^{*}& {-h}_{42}^{*}& h_{32}^{*}\end{array}\right],$ $H_{\mathrm{OT}}=\left[\begin{array}{cccc}{w}_{11}& w_{12}& w_{13}& w_{14}\\ w_{21}& w_{22}& w_{23}& w_{24}\\ w_{31}& w_{32}& w_{33}& w_{34}\\ w_{41}& w_{42}& w_{43}& w_{44}\end{array}\right];$

When number of transmit antennas is 8,

Wherein, h _TiBe transmitting antenna t and the corresponding channel parameter of reception antenna i.

The signal receiving device of the mimo system of tenth embodiment of the invention comprises two reception antennas, string commentaries on classics and module, conjugation processing module, matrix computations module and ML algoritic module as shown in figure 16.

Wherein, string commentaries on classics and module are used for the signal r with 4N symbol of antenna serial received _IjTransfer parallel signal output to, wherein r _IjBe i the signal that reception antenna is received in symbol j, i=1,2,1≤j≤4N, N are the integer greater than 0.For example, during N=1, show that transmitting terminal is four transmitting antennas, the signal r that will be received from reception antenna 1 ₁₁, r ₁₂, r ₁₃... and the signal r that is received from reception antenna 2 ₂₁, r ₂₂, r ₃₃..., convert 4 signal parallel outputs to, obtain parallel signal r ₁₁, r ₁₂, r ₂₁, r ₂₂

It is the r of even number that the conjugation processing module is used for the parallel signal sequence number j from string commentaries on classics and module _IjGet conjugation, keep the r that sequence number j is an odd number _IjConstant, result is exported as vector R.For parallel signal r ₁₁, r ₁₂, r ₂₁, r ₂₂, with r ₁₂And r ₂₂Get conjugation, obtain respectively

With

The matrix computations module is used for calculating and output matrix

The ML algoritic module then is used for for each possible testing result X _kCalculate its pairing Z _k=(R-H _CHH _OTX) ^H(R-H _CHH _OTX), at all Z _kMiddle search minimum value, pairing X exports as testing result with this minimum value.

Wherein, H _CHBe the pairing channel parameter matrix of each antenna,

H _OTBe the matrix of a linear transformation of transmitting terminal,

Subscript " H " representative is carried out the conjugate transpose operation to matrix.

Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.

Claims (17)

1. a multi-input and multi-output system signal sending method is characterized in that, transmitting terminal is that 1 component becomes the 2N group with 4N antenna with 2 in advance, and wherein N is the integer greater than 0;

During transmission, described transmitting terminal carries out linear transformation to sent 4N signal, and 4N the transformation results that generates is reassembled as 2N group as a result with 21 group;

To 2N group as a result, every group of idle bit when being 1 double antenna with code check respectively encoded, 2N is organized encoded signal send in turn by described 2N group antenna respectively, wherein simultaneously send 1 group of encoded signal in the time at 2 groups of antennas at per 2 symbols.

2. multi-input and multi-output system signal sending method according to claim 1 is characterized in that, described linear transformation is orthogonal transform.

3. multi-input and multi-output system signal sending method according to claim 2 is characterized in that described orthogonal transform comprises fast Fourier transform, Hadamard transform and cosine transform.

4. multi-input and multi-output system signal sending method according to claim 1 is characterized in that, described linear transformation further comprises following steps:

A 4N to be sent signal is divided into 2 conversion groups and carries out linear transformation respectively, each conversion group generates 2N transformation results, 4N transformation results is reassembled as 2N group as a result with 21 group, wherein each as a result 2 transformation results in the group from different conversion groups.

5. multi-input and multi-output system signal sending method according to claim 1 is characterized in that, also comprises following steps:

Earlier serial signal stream to be sent is converted to 4N parallel signal stream, from this 4N parallel signal stream, respectively gets 4N signal of 1 signal formation at every turn and carry out described linear transformation.

6. according to each described multi-input and multi-output system signal sending method in the claim 1 to 5, it is characterized in that idle bit when idle bit was " Alamouti " when described code check was 1 double antenna.

7. a multi-input and multi-output system signal dispensing device is characterized in that, comprise with 2 be 1 group 2N group antenna, with 2N group antenna 2N coding module and linear transform module one to one, wherein N is the integer greater than 0;

Described linear transform module is used for the signal linearity to be sent of 4N input is transformed into 4N transformation results, is 1 group with 2 and outputs to a described 2N coding module respectively;

Each described coding module is used for code check when being 1 double antenna, and idle bit is encoded, and outputs to 1 group of corresponding antenna;

2N group antenna sends the signal from corresponding coding module in turn, wherein simultaneously sends 1 group of encoded signal at 2 groups of antennas at per 2 symbols in the time.

8. multi-input and multi-output system signal dispensing device according to claim 7 is characterized in that, also comprising string changes and module, is used for serial signal stream to be sent is converted to 4N parallel signal stream, outputs to described linear transform module.

9. according to claim 7 or 8 described multi-input and multi-output system signal dispensing devices, it is characterized in that described linear transformation is orthogonal transform;

Idle bit when idle bit was " Alamouti " when described code check was 1 double antenna.

10. a multi-input and multi-output system signal method of reseptance corresponding to the described multi-input and multi-output system signal sending method of claim 1, is characterized in that, detects the signal of being received by following formula:

Wherein,

r _IjBe i the signal that reception antenna is received in symbol j, i=1,2,1≤j≤4N, N are the integer greater than 0, r _Ij ^*Represent r _IjConjugation,

Be the signal that needs detection,

Represent the estimated value of X, H _CHBe the pairing channel parameter matrix of each antenna, H _OTBe the matrix of a linear transformation of transmitting terminal,

Represent H _OTConjugate transpose,

Represent H _CHConjugate transpose, Represent the variance of zero-mean Gaussian Profile noise, I _nThe representation unit matrix, subscript " 1 " is represented matrix inversion.

11. multi-input and multi-output system signal method of reseptance according to claim 10 is characterized in that,

When number of transmit antennas is 4,

When number of transmit antennas is 8,

H wherein _TiBe transmitting antenna t and the corresponding channel parameter of reception antenna i.

12. multi-input and multi-output system signal method of reseptance according to claim 10 is characterized in that, described H _OTIt is orthogonal transform matrix.

13. the signal receiving device of a multi-input multi-output system corresponding to the described multi-input and multi-output system signal dispensing device of claim 7, is characterized in that, comprises:

Two reception antennas;

String changes and module, is used for the signal r with 4N symbol of described antenna serial received _IjTransfer parallel signal output to, wherein r _IjBe i the signal that reception antenna is received in symbol j;

The conjugation processing module, being used for the parallel signal sequence number j from described string commentaries on classics and module is the r of even number _IjGet conjugation, keep the r that sequence number j is an odd number _IjConstant, result is exported as vector R;

The matrix computations module is used for calculating and output matrix

The matrix multiple module obtains testing result after being used for Matrix C be multiply by vector R;

Wherein, i=1,2,1≤j≤4N, N are the integer greater than 0, H _CHBe the pairing channel parameter matrix of each antenna, H _OTBe the matrix of a linear transformation of transmitting terminal, Represent H _OTConjugate transpose,

Represent H _CHConjugate transpose,

Represent the variance of zero-mean Gaussian Profile noise, I _nThe representation unit matrix, subscript " 1 " is represented matrix inversion.

14. a multi-input and multi-output system signal method of reseptance corresponding to the described multi-input and multi-output system signal sending method of claim 1, is characterized in that, comprises following steps:

For each possible testing result X _kCalculate its pairing z _k=(R-H _CHH _OTX _k) ^H(R-H _CHH _OTX _K);

At all Z _kMiddle search minimum value is with the pairing X of this minimum value _kExport as testing result;

Wherein, subscript " H " representative is carried out the conjugate transpose operation to matrix, r _IjBe i the signal that reception antenna is received in symbol j, i=1,2,1≤j≤4N, N are the integer greater than 0, r _Ij ^*Represent r _IjConjugation,

Be the signal that needs detection, X _kBe the estimated value of X, H _CHBe the pairing channel parameter matrix of each antenna, H _OTIt is the matrix of a linear transformation of transmitting terminal.

15. multi-input and multi-output system signal method of reseptance according to claim 14 is characterized in that,

When number of transmit antennas is 4,

When number of transmit antennas is 8,

Wherein, h _TiBe transmitting antenna t and the corresponding channel parameter of reception antenna i.

16. multi-input and multi-output system signal method of reseptance according to claim 14 is characterized in that, described H _OTIt is orthogonal transform matrix.

17. the signal receiving device of a multi-input multi-output system corresponding to the described multi-input and multi-output system signal dispensing device of claim 7, is characterized in that, comprises:

Two reception antennas;

String changes and module, is used for the signal r with 4N symbol of described antenna serial received _IjTransfer parallel signal output to, wherein r _IjBe i the signal that reception antenna is received in symbol j;

The conjugation processing module, being used for the parallel signal sequence number j from described string commentaries on classics and module is the r of even number _IjGet conjugation, keep the r that sequence number j is an odd number _IjConstant, result is exported as vector R;

The ML algoritic module is used for for each possible testing result X _kCalculate its pairing z _k=(R-H _CHH _OTX _k) ^H(R-H _CHH _OTX _K), at all Z _kMiddle search minimum value is with the pairing X of this minimum value _kExport as testing result;

Wherein, i=1,2,1≤j≤4N, N are the integer greater than 0, H _CHBe the pairing channel parameter matrix of each antenna, H _OTBe the matrix of a linear transformation of transmitting terminal, subscript " H " representative is carried out the conjugate transpose operation to matrix.

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