CN1790942A - Multi-antenna transmission system and method - Google Patents

Abstract

The multi-antenna transmission system comprises: a space-time transmission matrix generator to convert the four data to be transmitted into matrix format to send to next; a data buffer to send opposite data to the next according to command from former generator; a matrix pretreater to send different data format to the next according to odd or even of transmission time; a space-time transmitter to transmit the data as agreed format; and a receiver ACK/NACK generator to send ACK signal to space-time retransmission controller for right receiving data or else send NACL signal. This invention shows well performance with common complexity, and has wide application.

Description

Multi-aerial transmission system and method

Technical field

The present invention relates to the field of information transmission in the multiple antenna communication, particularly multi-aerial transmission system and method.

Background technology

The multi-antenna transmitting transferring technology be a kind of by wireless communication system the technology that extensively adopts, transmission course when transmission matrix of general use is realized sky, each row of matrix are gone out by different antenna transmission, and worked different time slots or different carrier waves of each of matrix sends.Again transmission technology during about empty under four transmitting antenna situations, the method that company of Nortel Networks proposes is (IEEE C802.16e-04/113r2 as shown in Figure 2, Soft packet combining forSTC re-transmission to improve H-ARQ performance in MIMO mode, company of Nortel Networks, 2004-07-07.).Four data S that will transmit of each taking-up ₁, S ₂, S ₃, S ₄, transmission matrix generator module (200) when sending into sky, the generation form is the matrix of (1):

$S=\left[\begin{array}{cc}{s}_1& {-s}_2^{*}\\ s_2& s_1^{*}\\ s_3& {-\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="A20041010223100141.png"\; state="\{\{state\}\}">s</figure-callout>}}_4^{*}\\ s_4& s_3^{*}\end{array}\right]S=\left[\begin{array}{cc}{s}_1& {-s}_2^{*}\\ s_2& s_1^{*}\\ s_3& -{\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="A20041010223100141.png"\; state="\{\{state\}\}">s</figure-callout>}}_4^{*}\\ s_4& s_3^{*}\end{array}\right]---\left(1\right)$

Then matrix S is sent into the temporary transient storage that data buffer (202) carries out data, when waiting sky again transmission control unit (TCU) (206) send get new data instructions after, data buffer (202) is memory clear-up, and takes out four data S that next time will transmit ₅, S ₆, S ₇, S ₈Or the like the transmission that continues, finish up to transfer of data.Again the re-transmission of transmission control unit (TCU) (206) control data and whether transmit new data when empty, data transfer mode is realization in the transmitter (204) when sky.In first time transfer of data, transmitter (204) sends data in the data buffer, wherein antenna one usefulness time slot one transmission s with four antennas, two time slots when empty ₁, with time slot two transmission-s ₂ ^*(s ₂Negative strategic point altogether); Antenna dual-purpose time slot one sends s ₂, send s with time slot two ₁ ^*(s ₁Common strategic point); Antenna three usefulness time slots one send s ₃, with time slot two transmission-s ₄ ^*(s ₄Negative strategic point altogether); Antenna four-function time slot one sends s ₄, send s with time slot two ₃ ^*(s ₃Common strategic point).After this transmission is finished, if when empty again transmission control unit (TCU) (206) can receive the affirmation signal ACK that sends from receiver affirmation/rub-out signal generator (208), send out so just for data buffer (202) and get new data instructions, otherwise transmitter in the time of will controlling sky (204) carries out the transmission again of data, but compare with the last time transmission, different is that the data that time slot one and time slot two transmit need exchange.Order repeats two top data transfer up to receiving the confirmation signal ACK.

TIX has proposed improved re-transmission method (IEEEC802.16e-04/269r1 when empty, Enhancement for 4-antenna soft packet combining schemeusing unitary transformation, TIX, 2004-08-31.), as shown in Figure 3.The preceding matrix multiplier (304) that added of this method transmitter (306) when sky.Retransmit at the n time (n=0,1,2 ..., retransmit for the 0th time and to be transmission for the first time) time use matrix V _{N mould 7}The premultiplication matrix S, transmitter when sending into sky then transmits in (306), wherein V _{N mould 7}The subscript that refers to matrix V is the value of n after to 7 modulo operation.7 matrix V that this method provides are shown in the formula (2).

$V_0=\left(\begin{array}{cccc}1& 0& 0& 0\\ 0& 1& 0& 0\\ 0& 0& 1& 0\\ 0& 0& 0& 1\end{array}\right),V_1=\left(\begin{array}{cccc}0& 0& -1& 0\\ 0& 0& 0& -1\\ 1& 0& 0& 0\\ 0& 1& 0& 0\end{array}\right),V_2=\left(\begin{array}{cccc}1& 0& 0& 0\\ 0& 0& 1& 0\\ 0& 1& 0& 0\\ 0& 0& 0& 1\end{array}\right),V_3=\left(\begin{array}{cccc}1& 0& 0& 0\\ 0& 1& 0& 0\\ 0& 0& 0& 1\\ 0& 0& 1& 0\end{array}\right),$

$V_4=\left(\begin{array}{cccc}1& 0& 0& 0\\ 0& 0& 1& 0\\ 0& 1& 0& 0\\ 0& 0& 0& 1\end{array}\right),{\mathrm{<figure-callout\; id="5"\; label="V"\; filenames="A20041010223100132.png"\; state="\{\{state\}\}">V</figure-callout>}}_5=\left(\begin{array}{cccc}1& 0& 0& 0\\ 0& 0& 0& 1\\ 0& 0& 1& 0\\ 0& 1& 0& 0\end{array}\right),V_6=\left(\begin{array}{cccc}1& 0& 0& 0\\ 0& 0& 0& 1\\ 0& 1& 0& 0\\ 0& 0& 1& 0\end{array}\right)---\left(2\right)$

The performance of the method that provides in the prior art all needs to improve further, with progressively near the capacity of multi-antenna transmitting transferring technology.Again the simplest implementation of transmitting when the method in the prior art one is sky, pretreatment operation during without any sky, and actual when empty transmission often need to carry out pretreatment operation and improve performance.Method in the prior art two has added pretreatment operation, transmission performances is improved when empty, and the multiplier matrix that matrix takes advantage of operation to adopt in the preliminary treatment obtains by the method for exhaustion search, but because multiplier entry of a matrix element is limited in 1 and-1, so improvement in performance is not obvious, the leeway of further raising is still arranged, in addition, because 7 different multiplier matrixes are arranged, so just make pretreatment operation too complicated.

Summary of the invention

The purpose of this invention is to provide a kind of method of transmitting pretreatment operation when empty again, transmission performances when being used to improve sky reduces its complexity simultaneously.

For achieving the above object, a kind of multi-aerial transmission system comprises:

Transmission matrix generator when empty is transformed into the form of matrix to four data waiting for transmission, sends to data buffer;

Data buffer, during according to sky again the instruction of transmission control unit (TCU) corresponding data are sent to the matrix preprocessor;

The matrix preprocessor, being even number or odd number when the sky according to the number of times of transmission again, transmitter sends different data formats;

Transmitter when empty, according to the data structure that obtains, transfer of data when carrying out sky by four antennas of arranging form;

Receiver affirmation/rub-out signal generator if receiving terminal can correctly receive data, sends out confirmation signal ACK then for when empty again transmission control unit (TCU), otherwise receiver affirmations/rub-out signal generator when giving sky again transmission control unit (TCU) send out rub-out signal NACK.

The present invention proposes a kind of new preprocess method that transmits again when empty, with respect to present existent method, the present invention shows good performance, and complexity is not high again simultaneously.The present invention can also be applied to general when empty transmission technology, multiple terminals cooperation realize the communications fields such as MIMO technology.

Description of drawings

Fig. 1 be the present invention propose empty the time transmission system again;

Again transmission system when Fig. 2 is prior art one empty;

Again transmission system when Fig. 3 is prior art two empty;

Fig. 4 is the flow chart of re-transmission method embodiment one when realizing sky;

Re-transmission method and prior art one and twos' performance relatively when Fig. 5 was propose among the present invention empty;

Fig. 6 is the flow chart of re-transmission method embodiment two when realizing sky;

Fig. 7 is a block diagram of realizing general multi-antenna transmitting transmission scheme;

Fig. 8 realizes that the terminal cooperation realizes the block diagram of MIMO technical scheme.

Embodiment

The method that the present invention proposes as shown in Figure 1, concrete implementing procedure is as follows:

The first step if data waiting for transmission are arranged, is then taken out four data s that will transmit ₁, s ₂, s ₃, s ₄, transmission matrix generator module (100) when sending into sky, the matrix S (3) of form is sent matrix S into the temporary transient storage that data buffer (102) carries out data below producing, and transmission time n is made as 0.Turned to for second step.

$S=\left[\begin{array}{cc}{s}_1& {-s}_2^{*}\\ s_2& s_1^{*}\\ s_3& {-\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="A20041010223100141.png"\; state="\{\{state\}\}">s</figure-callout>}}_4^{*}\\ s_4& s_3^{*}\end{array}\right]---\left(3\right)$

Second step, if data buffer (102) data transfer instruction that sends of transmission control unit (TCU) (108) or data transfer instruction again again when receiving sky, then data buffer (102) sends to new matrix preprocessor (104) with the matrix S of buffer memory, and turns to for the 3rd step; If data buffer (102) when receiving sky again transmission control unit (TCU) (108) send get new data instructions, then data buffer (102) is memory clear-up, and turns to the first step.

The 3rd step, if when empty again transmission control unit (TCU) (108) judge re-transmission (n=0 the n time, 1,2, ..., n=0 is the 1st transmission or retransmits for the 0th time) in n be even number, transmitter (106) when transmission control unit (TCU) (108) is from data buffer (102) hollow again when empty adopts four antennas, two time slots to send data in the data buffer: antenna one usefulness time slot one transmission s ₁, with time slot two transmission-s ₂ ^*(s ₂Negative strategic point altogether); Antenna dual-purpose time slot one sends s ₂, send s with time slot two ₁ ^*(s ₁Common strategic point); Antenna three usefulness time slots one send s ₃, with time slot two transmission-s ₄ ^*(s ₄Negative strategic point altogether); Antenna four-function time slot one sends s ₄, send s with time slot two ₃ ^*(s ₃Common strategic point).If when empty again transmission control unit (TCU) (108) judge re-transmission (n=0 the n time, 1,2, ..., n=0 is the 1st transmission or retransmits for the 0th time) in n be odd number, when so empty again transmission control unit (TCU) (108) send out the preliminary treatment instruction just for new matrix preprocessor (104), produce new transmission matrix (4)

$\tilde{S}=\left[\begin{array}{cc}{\mathrm{js}}_1& {-\mathrm{js}}_2^{*}\\ {\mathrm{js}}_2& {\mathrm{js}}_1^{*}\\ {-\mathrm{js}}_3& {\mathrm{<figure-callout\; id="4"\; label="js"\; filenames="A20041010223100141.png"\; state="\{\{state\}\}">js</figure-callout>}}_4^{*}\\ {-\mathrm{js}}_4& {-\mathrm{js}}_3^{*}\end{array}\right]---\left(4\right)$

Transmitter (106) when transmission control unit (TCU) (108) control is empty again when empty then, adopt four antennas, two time slots to send the data data: antenna one usefulness time slot one sends js ₁, with time slot two transmission-js ₂ ^*Antenna dual-purpose time slot one sends js ₂, send js with time slot two ₁ ^*Antenna three usefulness time slots one transmission-js ₃, send js with time slot two ₄ ^*Antenna four-function time slot one transmission-js ₄, with time slot two transmission-js ₃ ^*Wherein j is-1 square root.Turned to for the 4th step.

The 4th step, if when empty again transmission control unit (TCU) (108) can receive the affirmation signal ACK that sends from receiver affirmations/rub-out signal generator (110), get new data instructions so just for data buffer (102), and turn to the first step; If when empty again transmission control unit (TCU) (108) can receive the rub-out signal NACK that sends from receiver affirmation/rub-out signal generator (110), the number of transmissions n adds 1 so, send out data transfer instruction again for data buffer (102), and turned to for second step.

Embodiment one: space-time adaptive retransmits 1

A wireless communication system that adopts multi-antenna technology, transmitting terminal has four antennas, and receiving terminal has at least two antennas.First line data of first transmitting antenna sending metrix A, second line data of second transmitting antenna sending metrix A, the third line data of the 3rd transmitting antenna sending metrix A, the fourth line data of the 4th transmitting antenna sending metrix A.Each antenna of first time slot is the first columns certificate of sending metrix A simultaneously, the secondary series data of second each antenna while sending metrix A of time slot, if receive the affirmation signal that receiving terminal sends, then continue to send new data, otherwise the 3rd columns certificate and the 4th columns certificate by each antenna while sending metrix A, if receive the affirmation signal that receiving terminal sends, then continue to send new data, otherwise by each antenna first columns certificate and the secondary series data of sending metrix A simultaneously.Repeat above-mentioned steps up to the affirmation signal of receiving that receiving terminal sends.Receiving terminal puts together the polylith that receives and adopts linear MMSE algorithm, linear zero forcing algorithm, maximum likelihood algorithm or the like to detect corresponding to same transmission data block.

$A=\left[\begin{array}{cccc}{s}_1& {-s}_2^{*}& {\mathrm{js}}_1& {-\mathrm{js}}_2^{*}\\ s_2& s_1^{*}& {\mathrm{js}}_2& {\mathrm{js}}_1^{*}\\ s_3& {-\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="A20041010223100141.png"\; state="\{\{state\}\}">s</figure-callout>}}_4^{*}& {-\mathrm{js}}_3& {\mathrm{<figure-callout\; id="4"\; label="js"\; filenames="A20041010223100141.png"\; state="\{\{state\}\}">js</figure-callout>}}_4^{*}\\ s_4& s_3^{*}& {-\mathrm{js}}_4& {-\mathrm{js}}_3^{*}\end{array}\right]$

The flow chart of present embodiment as shown in Figure 4.

We suppose that carrier frequency is 3.5GHz, and character rate is 20MHz, and the 20MHz bandwidth is divided into 1660 subcarriers, and the FFT size is 2048.We use the ITU-VA channel model, and maximum rate travel is made as 3km/h.Transmitting terminal has 4 antennas, and receiving terminal has 2 antennas.The QPSK modulation, the Turbo coded system of 0.5 code check.Fig. 5 is exactly in the MIMO-OFDM system, the performance simulation curve of three kinds of re-transmission methods when empty in frequency selective fading channels.In Fig. 5, the performance that we can observe method proposed by the invention is better than method one (method that company of Nortel Networks proposes) and method two (TIX), and required pretreatment operation complexity ratio method two is little.

Embodiment two: space-time adaptive retransmits 2

A wireless communication system that adopts multi-antenna technology, transmitting terminal has four antennas, and receiving terminal has at least four antennas.First line data of first transmitting antenna sending metrix A, second line data of second transmitting antenna sending metrix A, the third line data of the 3rd transmitting antenna sending metrix A, the fourth line data of the 4th transmitting antenna sending metrix A.Each antenna of first time slot sends the first columns certificate simultaneously, if sending out successfully, receiving terminal confirms, then continue to send new data, otherwise send the secondary series data simultaneously by each antenna, if sending out successfully, receiving terminal confirms, then continue to send new data, otherwise send the 3rd columns certificate simultaneously by each antenna, if sending out successfully, receiving terminal confirms, then continue to send new data, otherwise send the 4th columns certificate simultaneously, confirm if receiving terminal is sent out successfully by each antenna, then continue to send new data, otherwise send the first columns certificate simultaneously by each antenna.Repeat aforesaid operations and send out successfully affirmation up to receiving terminal.Receiving terminal gets up the polylith that receives and adopts linear MMSE algorithm, linear zero forcing algorithm, maximum likelihood algorithm or the like to detect corresponding to the data centralization of same transmission data block.

$A=\left[\begin{array}{cccc}{s}_1& {-s}_2^{*}& {\mathrm{js}}_1& {-\mathrm{js}}_2^{*}\\ s_2& s_1^{*}& {\mathrm{js}}_2& {\mathrm{js}}_1^{*}\\ s_3& {-\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="A20041010223100141.png"\; state="\{\{state\}\}">s</figure-callout>}}_4^{*}& {-\mathrm{js}}_3& {\mathrm{<figure-callout\; id="4"\; label="js"\; filenames="A20041010223100141.png"\; state="\{\{state\}\}">js</figure-callout>}}_4^{*}\\ s_4& s_3^{*}& {-\mathrm{js}}_4& {-\mathrm{js}}_3^{*}\end{array}\right]$

The flow chart of present embodiment as shown in Figure 6.

Embodiment three: general send when empty

A wireless communication system that adopts multi-antenna technology, transmitting terminal has four antennas, and receiving terminal has one or more antennas.First line data of first transmitting antenna sending metrix A, second line data of second transmitting antenna sending metrix A, the third line data of the 3rd transmitting antenna sending metrix A, the fourth line data of the 4th transmitting antenna sending metrix A.Each antenna of first time slot sends the first columns certificate simultaneously, and second each antenna of time slot sends the secondary series data simultaneously, and the 3rd each antenna of time slot sends the 3rd columns certificate simultaneously, and the 4th each antenna of time slot sends the 4th columns certificate simultaneously.Receiving terminal can adopt linear MMSE algorithm, linear zero forcing algorithm, maximum likelihood algorithm or the like to carry out Data Detection.

$A=\left[\begin{array}{cccc}{s}_1& {-s}_2^{*}& {\mathrm{js}}_1& {-\mathrm{js}}_2^{*}\\ s_2& s_1^{*}& {\mathrm{js}}_2& {\mathrm{js}}_1^{*}\\ s_3& {-\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="A20041010223100141.png"\; state="\{\{state\}\}">s</figure-callout>}}_4^{*}& {-\mathrm{js}}_3& {\mathrm{<figure-callout\; id="4"\; label="js"\; filenames="A20041010223100141.png"\; state="\{\{state\}\}">js</figure-callout>}}_4^{*}\\ s_4& s_3^{*}& {-\mathrm{js}}_4& {-\mathrm{js}}_3^{*}\end{array}\right]$

The block diagram of present embodiment as shown in Figure 7, transmission matrix generator (702) output matrix A and transmitting when transmitter (704) carries out sky when sending to sky when empty.

Embodiment four: the terminal cooperation realizes the MIMO technology

A wireless communication system that adopts multi-antenna technology, up link, two users send data to same base station.User terminal has two antennas, and the base station end has one or more antennas.First line data of first transmitting antenna sending metrix A of user one, second line data of second transmitting antenna sending metrix A of user one, the third line data of first transmitting antenna sending metrix A of user two, the fourth line data of second transmitting antenna sending metrix A of user two.Each antenna of first time slot is the first columns certificate of sending metrix A simultaneously, the secondary series data of second each antenna while sending metrix A of time slot, the 3rd columns certificate of the 3rd each antenna while sending metrix A of time slot, the 4th columns certificate of the 4th each antenna while sending metrix A of time slot.The base station end can adopt linear MMSE algorithm, linear zero forcing algorithm, maximum likelihood algorithm or the like to carry out Data Detection.

$A=\left[\begin{array}{cccc}{s}_1& {-s}_2^{*}& {\mathrm{js}}_1& {-\mathrm{js}}_2^{*}\\ s_2& s_1^{*}& {\mathrm{js}}_2& {\mathrm{js}}_1^{*}\\ s_3& {-\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="A20041010223100141.png"\; state="\{\{state\}\}">s</figure-callout>}}_4^{*}& {-\mathrm{js}}_3& {\mathrm{<figure-callout\; id="4"\; label="js"\; filenames="A20041010223100141.png"\; state="\{\{state\}\}">js</figure-callout>}}_4^{*}\\ s_4& s_3^{*}& {-\mathrm{js}}_4& {-\mathrm{js}}_3^{*}\end{array}\right]$

The block diagram of present embodiment as shown in Figure 8, wherein 802 modules are represented a portable terminal, the transmission matrix generator was promptly imported two data when 804 modules were a two dimension empty, exported the matrix of one 2 row four row

$S=\left[\begin{array}{cccc}{s}_1& {-s}_2^{*}& {\mathrm{js}}_1& {-\mathrm{js}}_2^{*}\\ s_2& s_1^{*}& {\mathrm{js}}_2& {\mathrm{js}}_1^{*}\end{array}\right]$ Perhaps $S=\left[\begin{array}{cccc}{s}_3& {-\mathrm{<figure-callout\; id="4"\; label="s"\; filenames="A20041010223100141.png"\; state="\{\{state\}\}">s</figure-callout>}}_4^{*}& {\mathrm{js}}_3& {-\mathrm{<figure-callout\; id="4"\; label="js"\; filenames="A20041010223100141.png"\; state="\{\{state\}\}">js</figure-callout>}}_4^{*}\\ s_4& s_3^{*}& {\mathrm{<figure-callout\; id="4"\; label="js"\; filenames="A20041010223100141.png"\; state="\{\{state\}\}">js</figure-callout>}}_4& {\mathrm{js}}_3^{*}\end{array}\right]$

Transmitter when sending to sky then (806) transmits.

Claims (18)

1. multi-aerial transmission system comprises:

Transmission matrix generator when empty is transformed into the form of matrix to four data waiting for transmission, sends to data buffer;

Data buffer, during according to sky again the instruction of transmission control unit (TCU) corresponding data are sent to the matrix preprocessor;

The matrix preprocessor, being even number or odd number when the sky according to the number of times of transmission again, transmitter sends different data formats;

Transmitter when empty, according to the data structure that obtains, transfer of data when carrying out sky by four antennas of arranging form;

Receiver affirmation/rub-out signal generator if receiving terminal can correctly receive data, sends out confirmation signal ACK then for when empty again transmission control unit (TCU), otherwise receiver affirmations/rub-out signal generator when giving sky again transmission control unit (TCU) send out rub-out signal NACK.

2. by the described system of claim 1, it is characterized in that the agreement form of described antenna comprises:

For even number time transmission again, antenna one usefulness time slot one sends s ₁, with time slot two transmission-s ₂ ^*

Antenna dual-purpose time slot one sends s ₂, send s with time slot two ₁ ^*Antenna three usefulness time slots one send s ₃, with time slot two transmission-s ₄ ^*

Antenna four-function time slot one sends s ₄, send s with time slot two ₃ ^*,

For odd number time transmission again, antenna one usefulness time slot one sends js ₁, with time slot two transmission-js ₂ ^*

Antenna dual-purpose time slot one sends js ₂, send js with time slot two ₁ ^*

Antenna three usefulness time slots one transmission-js ₃, send js with time slot two ₄ ^*

Antenna four-function time slot one transmission-js ₄, with time slot two transmission-js ₃ ^*, wherein j is-1 square root.

3. by the described system of claim 1, it is characterized in that the data format of matrix preprocessor output is so if Chuan Shu number of times is an even number again:

$S=\left[\begin{array}{cc}{s}_1& -s_2^{*}\\ s_2& s_1^{*}\\ s_3& -s_4^{*}\\ s_4& s_3^{*}\end{array}\right]$

If Chuan Shu number of times is an odd number again, the data format of matrix preprocessor output is so:

$\tilde{S}=\left[\begin{array}{cc}{\mathrm{js}}_1& -{\mathrm{js}}_2^{*}\\ {\mathrm{js}}_2& {\mathrm{js}}_1^{*}\\ -{\mathrm{js}}_3& {\mathrm{js}}_4^{*}\\ -{\mathrm{js}}_4& -{\mathrm{js}}_3^{*}\end{array}\right].$

4. multi-antenna transmission method comprises step:

Four data waiting for transmission are transformed into the form of matrix, send to data buffer;

During according to sky again the instruction of transmission control unit (TCU) corresponding data are sent to the matrix preprocessor;

Being even number or odd number when the sky according to the number of times of transmission again, transmitter sends different data formats;

According to the data structure that obtains, transfer of data when carrying out sky by four antennas of arranging form;

If receiving terminal can correctly receive data, send out confirmation signal ACK then for when empty again transmission control unit (TCU), otherwise receiver affirmations/rub-out signal generator when giving sky again transmission control unit (TCU) send out rub-out signal NACK.

5. by the described method of claim 4, it is characterized in that the data format of matrix preprocessor output is so if Chuan Shu number of times is an even number again:

$S=\left[\begin{array}{cc}{s}_1& -s_2^{*}\\ s_2& s_1^{*}\\ s_3& -s_4^{*}\\ s_4& s_3^{*}\end{array}\right]$

If Chuan Shu number of times is an odd number again, the data format of matrix preprocessor output is so:

$\tilde{S}=\left[\begin{array}{cc}{\mathrm{js}}_1& -{\mathrm{js}}_2^{*}\\ {\mathrm{js}}_2& {\mathrm{js}}_1^{*}\\ {-\mathrm{js}}_3& {\mathrm{js}}_4^{*}\\ -{\mathrm{js}}_4& -{\mathrm{js}}_3^{*}\end{array}\right].$

6. by the described method of claim 4, it is characterized in that it is even number that transmitting terminal is distinguished the number of times of transmission again, or odd number, wherein the transmission first of data is defined as the 0th transmission again.

7. by the described method of claim 4, it is characterized in that the agreement form of described antenna comprises:

For even number time transmission again, antenna one usefulness time slot one sends s ₁, with time slot two transmission-s ₂ ^*

Antenna dual-purpose time slot one sends s ₂, send s with time slot two ₁ ^*

Antenna three usefulness time slots one send s ₃, with time slot two transmission-s ₄ ^*

Antenna four-function time slot one sends s ₄, send s with time slot two ₃ ^*,

For odd number time transmission again, antenna one usefulness time slot one sends js ₁, with time slot two transmission-js ₂ ^*

Antenna dual-purpose time slot one sends js ₂, send js with time slot two ₁ ^*

Antenna three usefulness time slots one transmission-js ₃, send js with time slot two ₄ ^*

Antenna four-function time slot one transmission-js ₄, with time slot two transmission-js ₃ ^*, wherein j is-1 square root.

8. by the described method of claim 4, it is characterized in that described transmission means again comprises:

For the number of times of transmission again, transmitting terminal with this numerical value to 4 do ask modulo operation after, distinguishing again transmission is 0,1,2 still is 3.

9. by the described method of claim 8, it is characterized in that if Chuan Shu number of times is done 4 and equaled 0 after asking modulo operation again then the data format exported of matrix preprocessor is:

$S^{\left(0\right)}=\left[\begin{array}{c}{s}_1\\ s_2\\ s_3\\ s_4\end{array}\right].$

10. by the described method of claim 8, it is characterized in that if Chuan Shu number of times is done 4 and equaled 1 after asking modulo operation again then the data format exported of matrix preprocessor is:

$S^{\left(1\right)}=\left[\begin{array}{c}-s_2^{*}\\ s_1^{*}\\ -s_4^{*}\\ s_3^{*}\end{array}\right].$

11., it is characterized in that then the data format exported of matrix preprocessor is by the described method of claim 8 if Chuan Shu number of times is done 4 and equaled 2 after asking modulo operation again:

$S^{\left(2\right)}=\left[\begin{array}{c}{\mathrm{js}}_1\\ {\mathrm{js}}_2\\ -{\mathrm{js}}_3\\ -{\mathrm{js}}_4\end{array}\right].$

12. by the described method of claim 8, it is characterized in that the data format that so new matrix preprocessor is exported is if Chuan Shu number of times is done 4 and equaled 3 after asking modulo operation again:

$S^{\left(3\right)}=\left[\begin{array}{c}-{\mathrm{js}}_2^{*}\\ j{s}_1^{*}\\ j{s}_4^{*}\\ -j{s}_3^{*}\end{array}\right].$

13. by the described method of claim 9, the flow process of transmitter transmission data is when it is characterized in that sky: antenna one sends s ₁Antenna two sends simultaneously; Antenna three sends simultaneously; Antenna four sends s simultaneously ₄

14. by the described method of claim 10, the flow process of transmitter transmission data is when it is characterized in that sky: antenna one transmission-s ₂ ^*Antenna two sends s simultaneously ₁ ^*Antenna three is transmission-s simultaneously ₄ ^*Antenna four sends s simultaneously ₃ ^*

15. by the described method of claim 11, the flow process of transmitter transmission data is when it is characterized in that sky: antenna one sends js ₁Antenna two sends js simultaneously ₂Antenna three is transmission-js simultaneously ₃Antenna four is transmission-js simultaneously ₄, wherein j is-1 square root.

16. by the described method of claim 12, the flow process of transmitter transmission data is when it is characterized in that sky: antenna one transmission-js ₂ ^*Antenna two sends js simultaneously ₁ ^*Antenna three sends js simultaneously ₄ ^*Antenna four is transmission-js simultaneously ₃ ^*

17. by the described method of claim 4, it is characterized in that described when empty the data of transmission matrix generator write as following matrix form:

${0A}_1=\left[\begin{array}{cccc}{S}_1& -S_2^{*}& -j{S}_1& j{S}_2^{*}\\ S_2& S_1^{*}& -j{S}_2& -j{S}_1^{*}\\ S_3& -S_4^{*}& j{S}_3& -j{S}_4^{*}\\ S_4& S_3^{*}& j{S}_4& j{S}_3^{*}\end{array}\right]$ $A_2=\left[\begin{array}{cccc}{\mathrm{jS}}_1& -{\mathrm{jS}}_2^{*}& S_1& -S_2^{*}\\ {\mathrm{jS}}_2& {\mathrm{jS}}_1^{*}& S_2& S_1^{*}\\ {-\mathrm{jS}}_3& {\mathrm{jS}}_4^{*}& S_3& -S_4^{*}\\ -{\mathrm{jS}}_4& -{\mathrm{jS}}_3^{*}& S_4& S_3^{*}\end{array}\right]$

$A_3=\left[\begin{array}{cccc}-{\mathrm{jS}}_1& {\mathrm{jS}}_2^{*}& S_1& -S_2^{*}\\ -{\mathrm{jS}}_2& -{\mathrm{jS}}_1^{*}& S_2& S_1^{*}\\ {\mathrm{jS}}_3& -{\mathrm{jS}}_4^{*}& S_3& -S_4^{*}\\ {\mathrm{jS}}_4& {\mathrm{jS}}_3^{*}& S_4& S_3^{*}\end{array}\right]$ $A_4=\left[\begin{array}{cccc}{S}_1& -S_2^{*}& {\mathrm{jS}}_1& -{\mathrm{jS}}_2^{*}\\ S_2& S_1^{*}& {\mathrm{jS}}_2& {\mathrm{jS}}_1^{*}\\ S_3& -S_4^{*}& -{\mathrm{jS}}_3& {\mathrm{jS}}_4^{*}\\ S_4& S_3^{*}& -{\mathrm{jS}}_4& -{\mathrm{jS}}_3^{*}\end{array}\right]$

18. by the described method of claim 17, the process of transmitter transmission data when it is characterized in that sky may further comprise the steps:

First line data of the antenna one sending metrix A of transmitting terminal, second line data of antenna two sending metrix A, the third line data of antenna three sending metrix A, the fourth line data of antenna four sending metrix A, matrix A value A ₁, A ₂, A ₃Perhaps A ₄

Time slot one each antenna of transmitting terminal is the first columns certificate of sending metrix A simultaneously, time slot two each antennas are the secondary series data of sending metrix A simultaneously, time slot three each antennas are the 3rd columns certificate of sending metrix A simultaneously, and time slot four each antennas are the 4th columns certificate of sending metrix A simultaneously, matrix A value A ₁, A ₂, A ₃Perhaps A ₄

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