CN101222255B - Transmitting and receiving method and apparatus for implementing diversity transmission - Google Patents

Abstract

The invention provides a transmitting method for realizing diversity transmission, comprising the following steps: information symbols are arranged in groups; diversity conversion of each group of information symbols is completed; a transmitting end completes parallel transmission of the same group of diversity conversion result obtained through the diversity conversion of the same group of information symbols. Meanwhile, the invention discloses a receiving method for realizing diversity transmission, including the following steps: a receiving end determines the same group of information symbols according to the received signal carrying the same group of diversity conversion result. The invention also discloses a transmitting device for realizing diversity transmission, comprising a grouping unit, a diversity transmission unit and a transmitting unit. In addition, the invention discloses a receiving device for realizing diversity transmission, comprising a receiving unit and a receiving execution unit. The invention can improve the transmission efficiency of a system.

Description

Realize the method and apparatus of transmission and the reception of diversity transmission

Technical field

The present invention relates to wireless communication field, particularly relate to sending method, method of reseptance, dispensing device and the receiving system of realizing diversity transmission.

Background technology

Diversity technique is a kind of anti-fading technology of wireless communication field, this technology by utilize the fading channel of independently communicating by letter receive signal, in order to improve received signal to noise ratio, and then improve signal transmission quality.Diversity technique specifically comprises time diversity technique, space diversity reception to communicate and frequency diversity technique etc.Time diversity technique refers to surpass the channel time interval repeated signal of coherence time, makes the signal that repeats to send have different fading environment, forms independently communication channel, thus the generation time diversity.Frequency diversity technique refers at different frequency uploads the number of delivering letters, and its principle is based on the frequency outside the channel coherence bandwidth and does not there will be same fading environment, thereby the signal transmitted can form independently communication channel, reaches the frequency diversity effect.And space diversity reception to communicate refers to antenna transmission or the reception signal that is greater than the correlation distance of antenna by interval, so that the fading environment difference of emission or reception signal on different antennae, form independently communication channel, realize signal transmit diversity or receive diversity effect spatially.

Multiple-input and multiple-output (MIMO, the Multiple-Input Multiple-Output) antenna system proposed in recent years mainly adopts diversity technique to improve signal transmission quality.

Lower mask body is introduced a kind of method that realizes diversity transmission, the method adopts the mimo system of a reception antenna of four transmitting antennas, transmitting terminal adopts space-time emission diversity (STTD, Space time transmit diversity) coding method converts the information symbol after real part and imaginary part reconfigure to will launch STTD coded identification piece, do not launching these STTD coded identification pieces with identical frequency in the same time by many groups transmitting antenna, realize diversity with this, after receiving terminal carries out the STTD decoding to the symbol received, again the signal after judgement is reverted to original information symbol.As shown in Figure 1, the concrete steps of this transmission method are as follows:

Step 101: by information symbol grouping waiting for transmission.

4 information symbols are divided into to one group, without loss of generality, each information symbol in every group can be denoted as respectively to x ₁, x ₂, x ₃, x ₄.

Step 102: by the combination that interweaved of the real part of each information symbol in every group and imaginary part.

Its method is that real part and the imaginary part to each information symbol in every group reconfigures, and generates new information symbol, specifically according to following formula, realizes:

s ₁=Re(x ₁)+jIm(x ₃)

s ₂=Re(x ₂)+jIm(x ₄)

s ₃＝Re(x ₃)+jIm(x ₁) (1)

s ₄=Re(x ₄)+jIm(x ₂)

Wherein, Re () means the real part of signal, and Im () means the imaginary part of signal, and

Step 103: every group of information symbol carried out to space-time emission diversity STTD coding.

By information symbol (s ₁, s ₂) and (s ₃, s ₄) carry out respectively the STTD coding, obtain STTD coded identification piece $\left(\begin{array}{cc}{s}_1& s_2\\ -s_2^{*}& s_1^{*}\end{array}\right)$ With $\left(\begin{array}{cc}{s}_3& s_4\\ -s_4^{*}& s_3^{*}\end{array}\right).$ Here * means conjugation.

Step 104: transmitting terminal sends STTD coded identification piece successively.

At first, send respectively STTD coded identification piece by transmitting antenna 1 and transmitting antenna 2 within two adjacent moment $\left(\begin{array}{cc}{s}_1& s_2\\ -s_2^{*}& s_1^{*}\end{array}\right);$ Then, by transmitting antenna 3 and transmitting antenna 4, within ensuing adjacent two moment, sent $\left(\begin{array}{cc}{s}_3& s_4\\ -s_4^{*}& s_3^{*}\end{array}\right),$ Wherein, each transmitting antenna is transmitted into receiving terminal with same frequency by STTD coded identification piece.

Its concrete process of transmitting is: in first moment, transmitting antenna 1 sends STTD code element s ₁, transmitting antenna 2 sends STTD code element s ₂In second moment, transmitting antenna 1 sends the STTD code element Transmitting antenna 2 sends the STTD code element

The 3rd moment, transmitting antenna 3 sends STTD code element s ₃, transmitting antenna 4 sends STTD code element s ₄The 4th moment, transmitting antenna 3 sends the STTD code element

Transmitting antenna 4 sends the STTD code element

Above-mentioned launching technique can adopt emission matrix to mean, the emission matrix structure of the method is as follows:

$\left[\begin{array}{cccc}{s}_1& s_2& 0& 0\\ -s_2^{*}& s_1^{*}& 0& 0\\ 0& 0& s_3& s_4\\ 0& 0& -s_4^{*}& s_3^{*}\end{array}\right]---\left(2\right)$

Wherein, * means the conjugation of plural STTD code element.

The STTD code element that every a line in above-mentioned matrix is launched in 4 adjacent moment corresponding to a certain transmitting antenna corresponding to the STTD code element of launching on 4 transmitting antennas of a certain moment, each row.

Step 105: receiving terminal receives STTD coded identification piece successively.

The STTD coded identification piece of supposing each transmission antennas transmit is respectively h by fading parameter respectively ₁, h ₂, h ₃, h ₄Independently communication channel arrive reception antenna, suppose decline not variation within two adjacent moment of communication channel, the signal received in 4 adjacent moment is respectively:

r ₁=h ₁s ₁+h ₂s ₂+n ₁

$r_2=-h_1{s}_2^{*}+h_2{s}_1^{*}+n_2$

r ₃=h ₃s ₃+h ₄s ₄+n ₃

$r_4=-h_3{s}_4^{*}+h_4{s}_3^{*}+n_4---\left(3\right)$

Wherein, r ₁, r ₂, r ₃, r ₄Mean respectively the signal received in 4 adjacent moment, n ₁, n ₂, n ₃, n ₄Be illustrated respectively in the additive white Gaussian noise received in these 4 adjacent moment.

Step 106: the STTD coded identification received is decoded, estimate the information symbol through the combination that interweaves.

Can estimate to obtain the fading parameter h of each communication channel by the pilot signal of each antenna ₁, h ₂, h ₃, h ₄, according to STTD coding rule, the signal that receive of utilization as shown in formula (3), can obtain the information symbol estimated value through the combination that interweaves:

${\tilde{s}}_1=h_1^{*}{r}_1+h_2{r}_2^{*}$

${\tilde{s}}_2=h_2^{*}{r}_1-h_1{r}_2^{*}$

${\tilde{s}}_3=h_3^{*}{r}_3+h_4{r}_4^{*}$

${\tilde{s}}_4=h_4^{*}{r}_3-h_3{r}_4^{*}---\left(4\right)$

Then, the method adopts maximum-likelihood criterion to estimate that it realizes that formula is: for different information symbols, and if only if through the information symbol of the combination that interweaves

${|{\tilde{s}}_1-s_k|}^2\≤{|{\tilde{s}}_1-s_{k^{\′}}|}^2$

${|{\tilde{s}}_2-s_l|}^2\≤{|{\tilde{s}}_2-s_{l^{\′}}|}^2$

${|{\tilde{s}}_3-s_m|}^2\≤{|{\tilde{s}}_3-s_{m^{\′}}|}^2$

${|{\tilde{s}}_4-s_n|}^2\≤{|{\tilde{s}}_4-s_{n^{\′}}|}^2---\left(5\right)$

The time, judgement through the information symbol estimated value of the combination that interweaves is ${\hat{s}}_1=s_k,$ ${\hat{s}}_2=s_l,$ ${\hat{s}}_3=s_m,$ ${\hat{s}}_4=s_n,$ Here, k ≠ k ', l ≠ l ', m ≠ m ', n ≠ n '.

Step 107: reconfigure method according to real part and the imaginary part of every group of information symbol of transmitting terminal, recover the raw information symbol.

It realizes that formula is:

${\hat{x}}_1=\mathrm{Re}\left({\hat{s}}_1\right)+\mathrm{jIm}\left({\hat{s}}_3\right)$

${\hat{x}}_2=\mathrm{Re}\left({\hat{s}}_2\right)+\mathrm{jIm}\left({\hat{s}}_4\right)$

${\hat{x}}_3=\mathrm{Re}\left({\hat{s}}_3\right)+\mathrm{jIm}\left({\hat{s}}_1\right)$

${\hat{x}}_4=\mathrm{Re}\left({\hat{s}}_4\right)+\mathrm{jIm}\left({\hat{s}}_2\right)---\left(6\right)$

Can find out, the method adopts the mode that sends one by one STTD coded identification piece to realize diversity transmission, thereby cause in transmitting antenna 1 and transmitting antenna 2 transmission STTD code elements, transmitting antenna 3 and transmitting antenna 4 are idle, and transmitting antenna 3 and transmitting antenna 4 be when sending the STTD code element, transmitting antenna 1 and transmitting antenna 2 are idle.As can be seen here, this transmission method does not take full advantage of system resource, makes efficiency of transmission lower.

Summary of the invention

In view of this, first main purpose of the present invention is to provide a kind of sending method that realizes diversity transmission, and the method can improve efficiency of transmission.

Second main purpose of the present invention is to provide a kind of method of reseptance of realizing diversity transmission, and the method can improve efficiency of transmission.

The 3rd main purpose of the present invention is to provide a kind of dispensing device of realizing diversity transmission, and this device can improve efficiency of transmission.

The 4th main purpose of the present invention is to provide a kind of receiving system of realizing diversity transmission, and this device can improve efficiency of transmission.

In order to reach above-mentioned first purpose, the technical scheme that the present invention proposes is: a kind of sending method that realizes diversity transmission, and the method comprises:

Information symbol is divided into groups;

Each group information symbol is carried out to the diversity conversion;

The all transmitting antennas of transmitting terminal are according to emission matrix $\left[\begin{array}{ccccccc}{s}_1& s_2& s_3& s_4& \·\·\·& s_{2M-1}& s_{2M}\\ -s_2^{*}& s_1^{*}& -s_4^{*}& s_3^{*}& \·\·\·& -s_{2M}^{*}& s_{2M-1}^{*}\end{array}\right],$ The parallel same diversity transformation result sent after diversity is changed;

Wherein, the row of emission matrix engraves the space-time emission diversity STTD code element of all antenna transmissions, the STTD code element that matrix column is launched within adjacent two moment corresponding to the same antenna when same;

2M is number of transmit antennas, and M is any positive integer, s ₁, s ₂..., s _2MFor the information symbol after real part and imaginary part reconfigure; Obtain M corresponding diversity transformation result after the STTD coding, be respectively $\left(\begin{array}{cc}{s}_1& s_2\\ -s_2^{*}& s_1^{*}\end{array}\right),\left(\begin{array}{cc}{s}_3& s_4\\ -s_4^{*}& s_3^{*}\end{array}\right),......,\left(\begin{array}{cc}{s}_{2M-1}& s_{2M}\\ -s_{2M}^{*}& s_{2M-1}^{*}\end{array}\right),$ * the conjugation that means information symbol.

In order to reach above-mentioned second purpose, the technical scheme that the present invention proposes is: a kind of sending method that realizes diversity transmission, and the method comprises:

For N reception antenna, N>=M, be located in two adjacent moment, and the flat fading channel that arrives respectively n reception antenna by 2M transmitting antenna is Wherein, n=1,2 ..., N, M is any positive integer, the signal that n reception antenna in adjacent two moment receives is respectively

$r_1^{\left(n\right)}=\underset{m=1}{\overset{2M}{\mathrm{\Σ}}}{h}_m^{\left(n\right)}{s}_m$

$r_2^{\left(n\right)}=\underset{m=1}{\overset{M}{\mathrm{\Σ}}}(-h_{2m-1}^{\left(n\right)}{s}_{2m}^{*}+h_{2m}^{\left(n\right)}{s}_{2m-1}^{*})$

Wherein, With

Mean that respectively n reception antenna is at the moment 1 and the moment 2 signals that carry same group of STTD coded identification piece that receive; s ₁, s ₂..., s _2MFor from arbitrary group of the transmitting antenna information symbol after real part and imaginary part reconfigure, * means the conjugation of information symbol;

Determine the information symbol of described same group of STTD coded identification piece;

The method reconfigured according to real part and imaginary part, determine each information symbol.In order to reach above-mentioned the 3rd purpose, the technical scheme that the present invention proposes is: a kind of dispensing device of realizing diversity transmission, and this device comprises: grouped element, diversity converting unit and transmitting element;

Described grouped element, for information symbol is divided into groups, the information symbol of respectively organizing that grouping is obtained is input to the diversity converting unit;

Described diversity converting unit, carry out the diversity conversion for the information symbol of respectively organizing to the grouped element input, and each diversity transformation result by obtaining, be input to transmitting element;

Described transmitting element, for the same diversity transformation result by diversity converting unit input according to emission matrix $\left[\begin{array}{ccccccc}{s}_1& s_2& s_3& s_4& \·\·\·& s_{2M-1}& s_{2M}\\ -s_2^{*}& s_1^{*}& -s_4^{*}& s_3^{*}& \·\·\·& -s_{2M}^{*}& s_{2M-1}^{*}\end{array}\right],$ The parallel receiving terminal that sends to,

Wherein, the row of emission matrix engraves the STTD code element of all antenna transmissions, the STTD code element that matrix column is launched within adjacent two moment corresponding to the same antenna when same;

S ₁, s ₂..., s _2MFor the information symbol after real part and imaginary part reconfigure; 2M is number of transmit antennas, and M is any positive integer; Obtain M corresponding diversity transformation result after space-time emission diversity STTD coding, be respectively $\left(\begin{array}{cc}{s}_1& s_2\\ -s_2^{*}& s_1^{*}\end{array}\right),\left(\begin{array}{cc}{s}_3& s_4\\ -s_4^{*}& s_3^{*}\end{array}\right),......,\left(\begin{array}{cc}{s}_{2M-1}& s_{2M}\\ -s_{2M}^{*}& s_{2M-1}^{*}\end{array}\right),$ * the conjugation that means information symbol.

In order to reach above-mentioned the 4th purpose, the technical scheme that the present invention proposes is: a kind of receiving system of realizing diversity transmission, and this device comprises:

Described receiving element, receive for the frequency sub-carrier by different or identical frequency sub-carrier the signal that carries same diversity transformation result, by receiving the signal that carries same diversity transformation result, is input to the reception performance element;

Described reception performance element, for for N reception antenna, N>=M, be located in two adjacent moment, and the flat fading channel that arrives respectively n reception antenna by 2M transmitting antenna is

Wherein, n=1,2 ..., N, M is any positive integer, the signal that n reception antenna in adjacent two moment receives is respectively

$r_1^{\left(n\right)}=\underset{m=1}{\overset{2M}{\mathrm{\Σ}}}{h}_m^{\left(n\right)}{s}_m$

$r_2^{\left(n\right)}=\underset{m=1}{\overset{M}{\mathrm{\Σ}}}(-h_{2m-1}^{\left(n\right)}{s}_{2m}^{*}+h_{2m}^{\left(n\right)}{s}_{2m-1}^{*})$

Wherein,

With

Mean that respectively n reception antenna is at the moment 1 and the moment 2 signals that carry same group of STTD coded identification piece that receive; s ₁, s ₂..., s _2MFor the information symbol after real part and imaginary part reconfigure from arbitrary group of transmitting antenna, * means the conjugation of information symbol;

Determine the information symbol of described same group of STTD coded identification piece;

The method reconfigured according to real part and imaginary part, determine each information symbol.

In sum, the sending method that realizes diversity transmission, method of reseptance, dispensing device and receiving system that the present invention proposes, adopt parallel mode to send phase diversity transformation result on the same group, can take full advantage of frequency resource to realize diversity transmission, thereby, when realizing diversity gain, with the method that prior art utilizes time resource to form the space and time diversity coding, compare, can obtain higher efficiency of transmission.In a word, sending method, method of reseptance, dispensing device and the receiving system of realizing diversity transmission provided by the present invention, can improve efficiency of transmission effectively.

The accompanying drawing explanation

Fig. 1 is for realizing the method flow schematic diagram of diversity transmission in existing mimo system;

The schematic flow sheet that Fig. 2 is the embodiment of the present invention;

The structural representation that Fig. 3 is the embodiment of the present 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 the accompanying drawings and the specific embodiments.

Of the present inventionly a kind ofly realize that the technical scheme of the sending method of diversity transmission is: information symbol is divided into groups; Each group information symbol is carried out to the diversity conversion; The parallel same diversity transformation result sent after diversity is changed of transmitting terminal.

Of the present inventionly a kind ofly realize that the technical scheme of the method for reseptance of diversity transmission is: receiving terminal, according to the signal that carries same diversity transformation result received, is determined same group of information symbol.

Below take the schematic flow sheet shown in Fig. 2 as example, illustrate sending method and the method for reseptance of realizing diversity transmission provided by the invention, it is example that the present embodiment be take 2M transmitting antenna, a N reception antenna, the method that each group information symbol is carried out to the diversity conversion is: the information symbol of respectively organizing reconfigured through real part and imaginary part is carried out to the STTD coding, the STTD coded identification piece that will be obtained by described diversity conversion method, as the diversity transformation result, utilizes same frequency sub-carrier parallel receiving terminal that is transmitted in synchronization by all transmitting antennas; And receiving terminal is determined same group of information symbol according to the signal that carries same diversity transformation result received, specifically comprise the following steps:

Step 201: by information symbol grouping waiting for transmission.

In the present embodiment, according to the number of transmit antennas for space diversity, by information symbol waiting for transmission grouping, the information symbol number in every group equals the number of transmitting antenna.If 2M transmitting antenna is set in system, wherein, M is more than or equal to any positive integer of 2, intercepts 2M information symbol waiting for transmission as one group, without loss of generality, the 2M of an every group information symbol is denoted as respectively to x ₁, x ₂..., x _2M.Such as, M=2, every group has 4 information symbols, is denoted as respectively x ₁, x ₂, x ₃, x ₄.

Step 202: real part and imaginary part to each information symbol in each group are reconfigured.

In the present embodiment, can adopt deinterleaving method same as the prior art to realize reconfiguring, also can adopt following methods to be reconfigured real part and the imaginary part of each group information symbol:

Traversal is respectively organized information symbol, real part and the imaginary part of each information symbol in every group are combined with the imaginary part and the real part that are positioned at other information symbols of same group respectively, and, after guaranteeing to reconfigure, the real part of raw information symbol and imaginary part do not occur in same STTD coded identification piece.

In the present embodiment, by 2M information symbol x ₁, x ₂..., x _2MReal part and imaginary part reconfigure, generate new symbol, be denoted as respectively s ₁, s ₂..., s _2M, the method can be expressed as:

s _t=Re(x _p)+jIm(x _q) (7)

Wherein, Re () means the real part of signal, and Im () means the imaginary part of signal, and T, p, q=1,2 ..., 2M, p ≠ q and x _pWith x _qIn same STTD coded identification piece, occur.

Such as, every group has 4 information symbols, is denoted as respectively x ₁, x ₂, x ₃, x ₄.Information symbol to be launched after real part and imaginary part reconfigure is denoted as respectively s ₁, s ₂, s ₃, s ₄, according to formula (7), can obtain the following formula of realizing:

s ₁=Re(x ₁)+jIm(x ₄)

s ₂=Re(x ₂)+jIm(x ₃)

s ₃=Re(x ₄)+jIm(x ₁) (8)

s ₄=Re(x ₃)+jIm(x ₂)

Utilize formula (7) can also obtain the compound mode of other real parts and imaginary part, repeat no longer one by one here.

Step 203: each group information symbol is carried out to the STTD coding.

In the present embodiment, according to the STTD coding rule, in each group information symbol, every two information symbols combination is carried out to the STTD coding and produce a STTD coded identification piece, 2M transmitting antenna is set in supposing the system, for each group information symbol s ₁, s ₂..., s _2MObtain corresponding M STTD coded identification piece through the STTD coding $\left(\begin{array}{cc}{s}_1& s_2\\ -s_2^{*}& s_1^{*}\end{array}\right),\left(\begin{array}{cc}{s}_3& s_4\\ -s_4^{*}& s_3^{*}\end{array}\right),......,\left(\begin{array}{cc}{s}_{2M-1}& s_{2M}\\ -s_{2M}^{*}& s_{2M-1}^{*}\end{array}\right),$ Using it as the corresponding diversity transformation result of this group information symbol.Wherein, * mean the to win the confidence conjugation of breath symbol, its method is: when information symbol, during for plural number, this information symbol real part is remained unchanged, imaginary part is got opposite number, and when information symbol is real number, information symbol is constant.

Step 204: parallel each STTD coded identification piece that sends same group of information symbol generation of transmitting terminal.

At transmitting terminal, first by transmitting antenna grouping, every group of two transmitting antennas, every group of transmitting antenna utilizes identical subcarrier to send a STTD coded identification piece, each is organized transmitting antenna and can utilize identical subcarrier also can utilize parallel each STTD coded identification piece that sends same group of information symbol generation of different subcarriers, if respectively organize transmitting antenna, utilize different subcarriers to send, parallel each STTD coded identification piece sent does not interfere with each other, and its method of reseptance and decoding process are similar to prior art.The present embodiment adopts and respectively organizes the method that transmitting antenna utilizes the parallel transmission of same frequency sub-carrier, needs to consider respectively to organize the situation of phase mutual interference between the STTD coding.

Each is organized transmitting antenna and utilizes the parallel method that sends each STTD coded identification piece of same group of information symbol generation of same frequency sub-carrier can be expressed as following emission matrix:

$\left[\begin{array}{ccccccc}{s}_1& s_2& s_3& s_4& \·\·\·& s_{2M-1}& s_{2M}\\ -s_2^{*}& s_1^{*}& -s_4^{*}& s_3^{*}& \·\·\·& -s_{2M}^{*}& s_{2M-1}^{*}\end{array}\right],---\left(9\right)$

Wherein, the row of emission matrix is corresponding to the STTD code element on all transmitting antennas of synchronization, the STTD code element that matrix column is launched in constantly adjacent two corresponding to same transmitting antenna.

Take 4 transmitting antennas, being every group, 4 information symbols are arranged is example, first by transmitting antenna grouping, every group of two transmitting antennas, transmitting antenna 1 forms one group with transmitting antenna 2 one group of formation, transmitting antenna 3 with transmitting antenna 4, and the parallel method that sends the STTD coded identification piece of same group of transmitting terminal is specially:

In first moment, transmitting antenna 1 sends STTD code element s ₁, transmitting antenna 2 sends STTD code element s ₂, transmitting antenna 3 sends STTD code element s ₃, transmitting antenna 4 sends STTD code element s ₄In second moment, transmitting antenna 1 sends the STTD code element

Be s ₂Negative conjugate, transmitting antenna 2 sends the STTD code elements Be s ₁Conjugate, transmitting antenna 3 sends the STTD code elements

Transmitting antenna 4 sends the STTD code element

Above-mentioned emission matrix can be expressed as follows:

$\left[\begin{array}{cccc}{s}_1& s_2& s_3& s_4\\ -s_2^{*}& s_1^{*}& -s_4^{*}& s_3^{*}\end{array}\right]---\left(10\right)$

Step 205: receiving terminal receives the signal that carries same group of STTD coded identification piece.

In the present embodiment, be provided with N reception antenna in system, N>=M, be located in two adjacent moment, and the flat fading channel that arrives respectively n reception antenna by 2M transmitting antenna is Wherein, n=1,2 ..., N, the signal that n reception antenna in adjacent two moment receives is respectively

$r_1^{\left(n\right)}=\underset{m=1}{\overset{2M}{\mathrm{\Σ}}}{h}_m^{\left(n\right)}{s}_m$

$r_2^{\left(n\right)}=\underset{m=1}{\overset{M}{\mathrm{\Σ}}}(-h_{2m-1}^{\left(n\right)}{s}_{2m}^{*}+h_{2m}^{\left(n\right)}{s}_{2m-1}^{*})---\left(11\right)$

Wherein,

With

Mean respectively n (n=1,2 ..., N) individual reception antenna is at the moment 1 and the moment 2 signals that carry same group of STTD coded identification piece that receive.

Such as, adopting the system of 4 transmitting antennas, 2 reception antennas, the signal that this system receives in constantly adjacent two can be expressed as:

$r_1^{\left(1\right)}=h_1^{\left(1\right)}{s}_1+h_2^{\left(1\right)}{s}_2+h_3^{\left(1\right)}{s}_3+h_4^{\left(1\right)}{s}_4$

$r_2^{\left(1\right)}={-h}_1^{\left(1\right)}{s}_2^{*}+h_2^{\left(1\right)}{s}_1^{*}-h_3^{\left(1\right)}{s}_4^{*}+h_4^{\left(1\right)}{s}_3^{*}---\left(12\right)$

$r_1^{\left(2\right)}=h_1^{\left(2\right)}{s}_1+h_2^{\left(2\right)}{s}_2+h_3^{\left(2\right)}{s}_3+h_4^{\left(2\right)}{s}_4$

$r_2^{\left(2\right)}={-h}_1^{\left(2\right)}{s}_2^{*}+h_2^{\left(2\right)}{s}_1^{*}-h_3^{\left(2\right)}{s}_4^{*}+h_4^{\left(2\right)}{s}_3^{*}$

Wherein,

With Mean that respectively the 1st reception antenna is at the moment 1 and the moment 2 signals that carry same group of STTD coded identification piece that receive, and

With

Mean respectively that the 2nd reception antenna is at the moment 1 and the moment 2 signals that carry same group of STTD coded identification piece that receive.

Step 206: estimate the same group of information symbol sent after real part and imaginary part reconfigure.

Receiving terminal is according to the signal that carries same group of STTD coded identification piece that receives, and minutes three kinds situations are estimated the same group of information symbol reconfigured through real part and imaginary part:

The first situation: when each group transmitting antenna utilizes same group of STTD coded identification piece of the parallel transmission of different frequency sub-carrier, now, receiving terminal receives and carries same diversity transformation result signal by the different frequency subcarrier, and receiving terminal is distinguished each STTD coded identification piece in same group according to the different frequency of subcarrier; Step 206 should be: decoded according to the STTD coding rule respectively on the subcarrier of different frequency, estimate the same group of information symbol sent after real part and imaginary part reconfigure;

The second situation: when utilizing same group of STTD coded identification piece of the parallel transmission of identical frequency sub-carrier, now, receiving terminal receives and carries same diversity transformation result signal by same frequency subcarrier, and step 206 should be: directly utilize maximum-likelihood criterion to estimate the same group of information symbol reconfigured through real part and imaginary part simultaneously.

For k ≠ k ', l ≠ l ', m ≠ m ', n ≠ n ', and if only if

$\underset{n=1}{\overset{2}{\mathrm{\Σ}}}[{|r_1^{\left(n\right)}-(h_1^{\left(n\right)}{s}_k+h_2^{\left(n\right)}{s}_l+h_3^{\left(n\right)}{s}_m+h_4^{\left(n\right)}{s}_n)|}^2+{|r_2^{\left(n\right)}-(-h_1^{\left(n\right)}{s}_l^{*}+h_2^{\left(n\right)}{s}_k^{*}-h_3^{\left(n\right)}{s}_n^{*}+h_4^{\left(n\right)}{s}_m^{*})|}^2]\≤---\left(13\right)$

$\underset{n=1}{\overset{2}{\mathrm{\Σ}}}[{|r_1^{\left(n\right)}-(h_1^{\left(n\right)}{s}_{k^{\′}}+h_2^{\left(n\right)}{s}_{l^{\′}}+h_3^{\left(n\right)}{s}_{m^{\′}}+h_4^{\left(n\right)}{s}_{n^{\′}})|}^2+{|r_2^{\left(n\right)}-(-h_1^{\left(n\right)}{s}_{l^{\′}}^{*}+h_2^{\left(n\right)}{s}_{k^{\′}}^{*}-h_3^{\left(n\right)}{s}_{n^{\′}}^{*}+h_4^{\left(n\right)}{s}_{m^{\′}}^{*})|}^2]$ The time, the estimated value that judgement transmits is respectively ${\hat{s}}_1=s_k,$ ${\hat{s}}_2=s_l,$ ${\hat{s}}_3=s_m,$ ${\hat{s}}_4=s_n.$

The third situation: when utilizing same group of STTD coded identification piece of the parallel transmission of identical frequency sub-carrier, now, receiving terminal receives and carries same diversity transformation result signal by same frequency subcarrier, and receiving terminal is considered as disturbing, processing successively each STTD coded identification piece in same group by other STTD coded identification pieces in same group; Step 206 should be: decoded according to the STTD coding rule, estimate the same group of information symbol reconfigured through real part and imaginary part; Concrete grammar is:

Using the information symbol sent after real part and imaginary part reconfigure wait estimating as aiming symbol, and the information symbol that other are received simultaneously is as interference, after the STTD decoding, and the information symbol that the judgement of recycling maximum-likelihood criterion is launched.

In the present embodiment, the information symbol that the calculated signals received by n reception antenna sends after real part and imaginary part reconfigure

With

The formula of realizing of estimated value be:

${\tilde{s}}_{2t-1}^{\left(n\right)}={\left(h_{2t-1}^{\left(n\right)}\right)}^{*}{r}_{2t-1}^{\left(n\right)}+h_{2t}^{\left(n\right)}{\left(r_{2t}^{\left(n\right)}\right)}^{*}$

${\tilde{s}}_{2t}^{\left(n\right)}={\left(h_{2t}^{\left(n\right)}\right)}^{*}{r}_{2t-1}^{\left(n\right)}-h_{2t-1}^{\left(n\right)}{\left(r_{2t}^{\left(n\right)}\right)}^{*}---\left(14\right)$

Then, the information symbol that utilizes maximum-likelihood criterion to send after real part and imaginary part reconfigure each is estimated.For k ≠ k ', l ≠ l ', and if only if

$\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{|{\tilde{s}}_{2t-1}^{\left(n\right)}-s_k|}^2\≤\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{|{\tilde{s}}_{2t-1}^{\left(n\right)}-s_{k^{\′}}|}^2$

$\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{|{\tilde{s}}_{2t}^{\left(n\right)}-s_l|}^2\≤\underset{n=1}{\overset{N}{\mathrm{\Σ}}}{|{\tilde{s}}_{2t}^{\left(n\right)}-s_{l^{\′}}|}^2---\left(15\right)$

The time, the estimated value that judgement transmits is respectively

Accordingly, if system arranges 4 transmitting antennas, 2 reception antennas, at the information symbol s to reconfiguring through real part and imaginary part ₁And s ₂While being decoded respectively, will receive and comprise s ₃And s ₄Signal be considered as disturbing, can obtain s thus ₁And s ₂Estimated value be respectively:

${\tilde{s}}_1^{\left(1\right)}={\left(h_1^{\left(1\right)}\right)}^{*}{r}_1^{\left(1\right)}+h_2^{\left(1\right)}{\left(r_2^{\left(1\right)}\right)}^{*}$

${\tilde{s}}_2^{\left(1\right)}={\left(h_2^{\left(1\right)}\right)}^{*}{r}_1^{\left(1\right)}-h_1^{\left(1\right)}{\left(r_2^{\left(1\right)}\right)}^{*}---\left(16\right)$

${\tilde{s}}_1^{\left(2\right)}={\left(h_1^{\left(2\right)}\right)}^{*}{r}_1^{\left(2\right)}+h_2^{\left(2\right)}{\left(r_2^{\left(2\right)}\right)}^{*}$

${\tilde{s}}_2^{\left(2\right)}={\left(h_2^{\left(2\right)}\right)}^{*}{r}_1^{\left(2\right)}-h_1^{\left(2\right)}{\left(r_2^{\left(2\right)}\right)}^{*}$

Wherein, With

Mean respectively the s by the 1st calculated signals that reception antenna receives ₁And s ₂Estimated value; And

With

Mean respectively the s by the 2nd calculated signals that reception antenna receives ₁And s ₂Estimated value.

As the information symbol s to reconfiguring through real part and imaginary part ₃And s ₄While being decoded, what will receive comprises s ₁And s ₂Signal be considered as disturbing, can obtain s thus ₃And s ₄Estimated value be respectively:

${\tilde{s}}_3^{\left(1\right)}={\left(h_3^{\left(1\right)}\right)}^{*}{r}_1^{\left(1\right)}+h_4^{\left(1\right)}{\left(r_2^{\left(1\right)}\right)}^{*}$

${\tilde{s}}_4^{\left(1\right)}={\left(h_4^{\left(1\right)}\right)}^{*}{r}_1^{\left(1\right)}-h_3^{\left(1\right)}{\left(r_2^{\left(1\right)}\right)}^{*}---\left(17\right)$

${\tilde{s}}_3^{\left(2\right)}={\left(h_3^{\left(2\right)}\right)}^{*}{r}_1^{\left(2\right)}+h_4^{\left(2\right)}{\left(r_2^{\left(2\right)}\right)}^{*}$

${\tilde{s}}_4^{\left(2\right)}={\left(h_4^{\left(2\right)}\right)}^{*}{r}_1^{\left(2\right)}-h_3^{\left(2\right)}{\left(r_2^{\left(2\right)}\right)}^{*}$

Wherein,

With

Mean respectively the s by the 1st calculated signals that reception antenna receives ₃And s ₄Estimated value; And

With

Mean respectively the s by the 2nd calculated signals that reception antenna receives ₃And s ₄Estimated value.

Then, utilize respectively maximum-likelihood criterion to be adjudicated launched signal,, for k ≠ k ', l ≠ l ', m ≠ m ', n ≠ n ', and if only if

${|{\tilde{s}}_1^{\left(1\right)}-s_k|}^2+{|{\tilde{s}}_1^{\left(2\right)}-s_k|}^2\≤{|{\tilde{s}}_1^{\left(1\right)}-s_{k^{\′}}|}^2+{|{\tilde{s}}_1^{\left(2\right)}-s_{k^{\′}}|}^2$

${|{\tilde{s}}_2^{\left(1\right)}-s_l|}^2+{|{\tilde{s}}_2^{\left(2\right)}-s_l|}^2\≤{|{\tilde{s}}_2^{\left(1\right)}-s_{l^{\′}}|}^2+{|{\tilde{s}}_2^{\left(2\right)}-s_{l^{\′}}|}^2$

${|{\tilde{s}}_3^{\left(1\right)}-s_m|}^2+{|{\tilde{s}}_3^{\left(2\right)}-s_m|}^2\≤{|{\tilde{s}}_3^{\left(1\right)}-s_{m^{\′}}|}^2+{|{\tilde{s}}_3^{\left(2\right)}-s_{m^{\′}}|}^2$

${|{\tilde{s}}_4^{\left(1\right)}-s_n|}^2+{|{\tilde{s}}_4^{\left(2\right)}-s_n|}^2\≤{|{\tilde{s}}_4^{\left(1\right)}-s_{n^{\′}}|}^2+{|{\tilde{s}}_4^{\left(2\right)}-s_{n^{\′}}|}^2---\left(18\right)$

The time, the estimated value of the information symbol that judgement sends after real part and imaginary part reconfigure is ${\hat{s}}_1=s_k,$ ${\hat{s}}_2=s_l,$ ${\hat{s}}_3=s_m,$ ${\hat{s}}_4=s_n.$

Step 207: the method reconfigured according to real part and imaginary part, determine each information symbol.

The present embodiment reconfigures method by the estimated value of the information symbol sent after real part and imaginary part reconfigure in same group according to the real part of formula (8) and imaginary part

Return to the estimated value of raw information symbol

Thereby determine each information symbol in same group.Its specific implementation is:

${\hat{x}}_1=\mathrm{Re}\left({\hat{s}}_1\right)+\mathrm{jIm}\left({\hat{s}}_4\right)$

${\hat{x}}_2=\mathrm{Re}\left({\hat{s}}_2\right)+\mathrm{jIm}\left({\hat{s}}_3\right)$

${\hat{x}}_3=\mathrm{Re}\left({\hat{s}}_4\right)+\mathrm{jIm}\left({\hat{s}}_1\right)$

${\hat{x}}_4=\mathrm{Re}\left({\hat{s}}_3\right)+\mathrm{jIm}\left({\hat{s}}_2\right)---\left(19\right)$

In the above-described embodiment, the method that each group information symbol is carried out to the diversity conversion is that the information symbol of respectively organizing after real part and imaginary part reconfigure carries out the STTD coding to each information symbol, also can directly to each group information symbol, carry out the STTD coding, can also be other Space Time Coding or diversity conversion regime, thereby obtain corresponding diversity transformation result.

Corresponding with the sending method that realizes diversity transmission and method of reseptance, the present invention also provides dispensing device and the receiving system of realizing diversity transmission, below take the structural representation shown in Fig. 3 as example, the dispensing device 310 and the receiving system 320 that provide in the embodiment of the present invention are provided;

Wherein, emitter 310, by the information symbol grouping, carries out the diversity conversion to each group information symbol, the parallel receiving terminal 320 that sends to of the same diversity transformation result that same group of information symbol diversity is converted to;

The signal that carries same diversity transformation result that 320 bases of receiving system receive, determine same group of information symbol.

Emitter 310 comprises grouped element 311, diversity converting unit 312 and transmitting element 313;

Grouped element 311, by the information symbol grouping, the information symbol of respectively organizing that grouping is obtained is input to diversity converting unit 312;

Diversity converting unit 312, the information symbol of respectively organizing that grouped element is inputted carries out the diversity conversion, and each diversity transformation result by obtaining, be input to transmitting element 313;

Transmitting element 313, by the parallel receiving system 320 that sends to of the same diversity transformation result of diversity converting unit 312 inputs.

Wherein, in the diversity converting unit, can only include the Space Time Coding device, for carrying out Space Time Coding, realize the grouped element input respectively organized to the conversion of information symbol diversity.

In the present embodiment, the diversity converting unit comprises composite module 315 and Space Time Coding device 314; In the present embodiment, Space Time Coding device 314 is the STTD encoder.

Composite module 315, reconfigured for the real part of respectively organizing information symbol and imaginary part to grouped element 311 input, and the information symbol of respectively organizing that will reconfigure through real part and imaginary part is input to STTD encoder 314;

Space Time Coding device 314, carry out Space Time Coding for the information symbol of respectively organizing reconfigured through real part and imaginary part by composite module 315 input, by what obtain, respectively organizes the Space Time Coding symbolic blocks, is input to transmitting element 313.

Receiving system 320 comprises receiving element 321 and receives performance element 322;

Receiving element 321, receive by different frequency sub-carrier or same frequency sub-carrier the signal that carries same diversity transformation result, by receiving the signal that carries same diversity transformation result, is input to reception performance element 322;

Receive performance element 322, according to the signal that carries same diversity transformation result that receives of receiving element 321 inputs, determine same group of information symbol.

Remove the example that above embodiment provides, can also adopt the sending method of diversity transmission provided by the invention, by the information symbol grouping, each group information symbol be carried out to the diversity conversion, the parallel same diversity transformation result sent after diversity is changed, and adopt other method of reseptance to realize diversity transmission.

Correspondingly, can adopt the dispensing device of diversity transmission of the present invention, realize the information symbol grouping, each group information symbol is carried out to the diversity conversion, by the parallel receiving system that sends to other of the same diversity transformation result after the diversity conversion.

These are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (12)

1. a sending method that realizes diversity transmission, is characterized in that, the method comprises:

Information symbol is divided into groups;

Each group information symbol is carried out to the diversity conversion;

The all transmitting antennas of transmitting terminal are according to emission matrix $\left[\begin{array}{ccccccc}{s}_1& s_2& s_3& s_4& \·\·\·& s_{2M-1}& s_{2M}\\ -s_2^{*}& s_1^{*}& -s_4^{*}& s_3^{*}& \·\·\·& -s_{2M}^{*}& s_{2M-1}^{*}\end{array}\right],$ The parallel same diversity transformation result sent after diversity is changed;

Wherein, the row of emission matrix engraves the space-time emission diversity of all antenna transmissions when same

The STTD code element, the STTD code element that matrix column is launched within adjacent two moment corresponding to the same antenna;

2M is number of transmit antennas, and M is any positive integer,

S ₁, s ₂..., s _2MFor the information symbol after real part and imaginary part reconfigure, the method that described real part and imaginary part are reconfigured is: traversal is respectively organized information symbol, by the real part of each information symbol in every group and imaginary component from, with imaginary part and the real part of other information symbols of same group, combined respectively, and, after guaranteeing to reconfigure, the real part of raw information symbol and imaginary part do not occur in same STTD coded identification piece;

Obtain M corresponding diversity transformation result after the STTD coding, be respectively $\left(\begin{array}{cc}{s}_1& s_2\\ -s_2^{*}& s_1^{*}\end{array}\right),$ $\left(\begin{array}{cc}{s}_3& s_4\\ -s_4^{*}& s_3^{*}\end{array}\right),$ ……、 $\left(\begin{array}{cc}{s}_{2M-1}& s_{2M}\\ -s_{2M}^{*}& s_{2M-1}^{*}\end{array}\right),$ * the conjugation that means information symbol.

2. sending method according to claim 1, is characterized in that, the method for the same diversity transformation result after described parallel transmission diversity conversion is:

Each is organized transmitting antenna and utilizes different frequency sub-carrier or identical frequency sub-carrier, the parallel same diversity transformation result sent after diversity is changed.

3. a method of reseptance of realizing diversity transmission, is characterized in that, the method comprises:

For N reception antenna, N>=M, be located in two adjacent moment, and the flat fading channel that arrives respectively n reception antenna by 2M transmitting antenna is

Wherein, n=1,2 ..., N, M is any positive integer, the signal that n reception antenna in adjacent two moment receives is respectively

$r_1^{\left(n\right)}=\underset{m=1}{\overset{2M}{\mathrm{\Σ}}}{h}_m^{\left(n\right)}{s}_m$

$r_2^{\left(n\right)}=\underset{m=1}{\overset{M}{\mathrm{\Σ}}}(-h_{2m-1}^{\left(n\right)}{s}_{2m}^{*}+h_{2m}^{\left(n\right)}{s}_{2m-1}^{*})$

Wherein, With

Mean that respectively n reception antenna is at the moment 1 and the moment 2 signals that carry same group of STTD coded identification piece that receive;

S ₁, s ₂..., s _2MFor from arbitrary group of the transmitting antenna information symbol after real part and imaginary part reconfigure, the method that described real part and imaginary part are reconfigured is: traversal is respectively organized information symbol, by the real part of each information symbol in every group and imaginary component from, with imaginary part and the real part of other information symbols of same group, combined respectively, and, after guaranteeing to reconfigure, the real part of raw information symbol and imaginary part do not occur in same STTD coded identification piece; * the conjugation that means information symbol;

Determine the information symbol of described same group of STTD coded identification piece;

The method reconfigured according to real part and imaginary part, determine each information symbol.

4. method according to claim 3, is characterized in that, when receiving terminal receives while carrying same diversity transformation result signal by the different frequency subcarrier, describedly determines that the method for same group of information symbol comprises:

Receiving terminal receives the signal that carries same diversity transformation result on each frequency sub-carrier; According to the method for transmitting terminal diversity conversion, determine each information symbol in same group.

5. method according to claim 3, is characterized in that, when receiving terminal receives while carrying same diversity transformation result signal by same frequency subcarrier, describedly determines that the method for same group of information symbol comprises:

Receiving terminal receives all signal combination of carrying same diversity transformation result on this frequency sub-carrier; Utilize maximum-likelihood criterion to determine same group of information symbol simultaneously.

6. method according to claim 3, is characterized in that, when receiving terminal receives while carrying same diversity transformation result signal by same frequency subcarrier, describedly determines that the method for same group of information symbol comprises:

Receiving terminal receives all signal combination of carrying same diversity transformation result on this frequency sub-carrier; According to the method for transmitting terminal diversity conversion, other diversity transformation results in same group are considered as disturbing, processing successively each diversity transformation result in same group; Determine each information symbol in same group.

7. according to the described method of claim 4 or 6, it is characterized in that, when receiving terminal receives diversity after the same diversity transformation result of carrying in signal is the space-time encoded diversity conversion of same group of information symbol as a result the time, the method for described each information symbol in determining same group is:

When the signal that carries same diversity transformation result received is carried out to corresponding sky, decoding, utilize maximum-likelihood criterion to determine each information symbol in same group.

8. according to the described method of claim 4 or 6, it is characterized in that, when the receiving terminal diversity that to receive the same diversity transformation result of carrying in signal be same group of information symbol carries out the conversion of Space Time Coding diversity after real part and imaginary part reconfigure again as a result the time, the method for described each information symbol in determining same group is:

The decoding when signal that carries same diversity transformation result received is carried out to sky, utilize maximum-likelihood criterion to determine each information symbol after real part and imaginary part reconfigure in same group; Respectively organize the real part of information symbol and the method that imaginary part is reconfigured according to transmitting terminal, determine each information symbol in same group.

9. a dispensing device of realizing diversity transmission, is characterized in that, this device comprises grouped element, diversity converting unit and transmitting element;

Described grouped element, for information symbol is divided into groups, the information symbol of respectively organizing that grouping is obtained is input to the diversity converting unit;

Described diversity converting unit, carry out the diversity conversion for the information symbol of respectively organizing to the grouped element input, and each diversity transformation result by obtaining, be input to transmitting element;

Described transmitting element, for the same diversity transformation result by diversity converting unit input according to emission matrix $\left[\begin{array}{ccccccc}{s}_1& s_2& s_3& s_4& \·\·\·& s_{2M-1}& s_{2M}\\ -s_2^{*}& s_1^{*}& -s_4^{*}& s_3^{*}& \·\·\·& -s_{2M}^{*}& s_{2M-1}^{*}\end{array}\right],$ The parallel receiving terminal that sends to,

Wherein, the row of emission matrix engraves the STTD code element of all antenna transmissions, the STTD code element that matrix column is launched within adjacent two moment corresponding to the same antenna when same;

S ₁, s ₂..., s _2MFor the information symbol after real part and imaginary part reconfigure, the method that described real part and imaginary part are reconfigured is: traversal is respectively organized information symbol, by the real part of each information symbol in every group and imaginary component from, with imaginary part and the real part of other information symbols of same group, combined respectively, and, after guaranteeing to reconfigure, the real part of raw information symbol and imaginary part do not occur in same STTD coded identification piece;

2M is number of transmit antennas, and M is any positive integer; Obtain M corresponding diversity transformation result after space-time emission diversity STTD coding, be respectively $\left(\begin{array}{cc}{s}_1& s_2\\ -s_2^{*}& s_1^{*}\end{array}\right),$ $\left(\begin{array}{cc}{s}_3& s_4\\ -s_4^{*}& s_3^{*}\end{array}\right),$ ……、 $\left(\begin{array}{cc}{s}_{2M-1}& s_{2M}\\ -s_{2M}^{*}& s_{2M-1}^{*}\end{array}\right),$ * the conjugation that means information symbol.

10. device according to claim 9, is characterized in that, described diversity converting unit is the Space Time Coding device.

11. device according to claim 9, is characterized in that, described diversity converting unit comprises composite module and Space Time Coding device;

Described composite module, reconfigured for real part and the imaginary part of each information symbol of respectively organizing information symbol to grouped element input, and the information symbol of respectively organizing after real part and imaginary part reconfigure is input to the Space Time Coding device;

Described Space Time Coding device, carry out Space Time Coding for the information symbol of respectively organizing after real part and imaginary part reconfigure by composite module input, by what obtain, respectively organizes the Space Time Coding symbolic blocks, is input to transmitting element.

12. a receiving system of realizing diversity transmission, is characterized in that, this device comprises receiving element and receives performance element;

Described receiving element, receive for the frequency sub-carrier by different or identical frequency sub-carrier the signal that carries same diversity transformation result, by receiving the signal that carries same diversity transformation result, is input to the reception performance element;

Described reception performance element, for for N reception antenna, N>=M, be located in two adjacent moment, and the flat fading channel that arrives respectively n reception antenna by 2M transmitting antenna is

Wherein, n=1,2 ..., N, M is any positive integer, the signal that n reception antenna in adjacent two moment receives is respectively

$r_1^{\left(n\right)}=\underset{m=1}{\overset{2M}{\mathrm{\Σ}}}{h}_m^{\left(n\right)}{s}_m$

$r_2^{\left(n\right)}=\underset{m=1}{\overset{M}{\mathrm{\Σ}}}(-h_{2m-1}^{\left(n\right)}{s}_{2m}^{*}+h_{2m}^{\left(n\right)}{s}_{2m-1}^{*})$

Wherein, With

Mean that respectively n reception antenna is at the moment 1 and the moment 2 signals that carry same group of STTD coded identification piece that receive; s ₁, s ₂..., s _2MFor the information symbol after real part and imaginary part reconfigure from arbitrary group of transmitting antenna, the method that described real part and imaginary part are reconfigured is: traversal is respectively organized information symbol, by the real part of each information symbol in every group and imaginary component from, with imaginary part and the real part of other information symbols of same group, combined respectively, and, after guaranteeing to reconfigure, the real part of raw information symbol and imaginary part do not occur in same STTD coded identification piece; * the conjugation that means information symbol;

Determine the information symbol of described same group of STTD coded identification piece;

The method reconfigured according to real part and imaginary part, determine each information symbol.

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