CN1838582A - Automatic retransmission requesting method using channel decomposition, and transmit/receive processing unit - Google Patents

Abstract

The invention provides a mixing automatic re-transfer request method based on the multi-antenna input and output channel decomposition, which comprises a receiving end used to a do geometric average decomposition to the channel matrix to obtain the pre-code matrix and the adjusting zero weight generating matrix; it feedbacks the pre-code matrix to the sending end and uses the adjusting zero weight generating matrix to generate the least mean square error adjusting zero weight vector; it dose forward error correction coding to the sending data package, adds the cyclic redundancy check and uses pre-coding matrix to pre-code the sending data package at the sending end; it uses each sub channel receiving signal and the corresponding adjusting zero weight vector and sub channel gain to obtain each sub channel receiving signal and then dose forward error correction decoding, it uses cyclic redundancy check to check the sectionalization quality at the receiving end; if the data sectionalization has error, retransfer it and stores the error sectionalization at the receiving end, groups the error retransfer data and decodes after amalgamating it with the buffer storage group.

Description

Utilize automatic retransmission request method, and the transmission/reception processing unit of channel decomposing

Technical field

The present invention relates to a kind of multi-aerial radio communication system, specifically, relate to the mixed automatic retransmission request method and the transmission/reception processing unit that utilize the channel decomposing feature.

Background technology

Along with the fusion gradually of wireless network, multimedia technology and internet, people are more and more higher to the requirement of the type of radio communication service and quality.For satisfying the requirement of radio multimedium and high speed data transfers, need the Development of New Generation wireless communication system.In the new generation of wireless system, to network layer, will extensively adopt some new technologies, and wherein many antennas input and output (MIMO), mix automatic repeat requests (HARQ) etc. and be subjected to extensive concern from physical layer, media access control layer.

Mimo system is meant and is sending and receiving terminal use multi-antenna array, need not to expend under the condition of excess power and bandwidth, can significantly improve power system capacity and wireless transmission link quality (bit error rate BER), be applicable to the multimedia service such as sound, video of transmission of high-rate.The mode of utilizing the MIMO technology to improve power system capacity and transmission quality comprises two classes: space division multiplexing and space diversity.Structure (BLAST) when the typical application example of space division multiplexing is dblast, it resolves into several independent sub data flows to entire stream and sends from multiple antenna is parallel; During more than or equal to number of transmit antennas, channel capacity and the number of transmit antennas of BLAST are linear at reception antenna, and this has promoted Shannon's theorems.

On the other hand, be to improve reliability of data transmission, can realize by retransmitting, promptly current when once attempting bust this, just require retransmitted data packet, this transmission mechanism is called automatic request retransmission (ARQ).Under wireless environment, because noise and channel fading and interference etc. make channel transmission quality very poor, grouping adds forward error correction coding (FEC) and suppresses various interference to data, and too much FEC can make the efficiency of transmission step-down.Therefore, hybrid ARQ (HARQ) scheme that ARQ and FEC combine has been proposed.Based on channel condition, HARQ can provide accurate code rate to regulate, and can adapt to instantaneous channel conditions automatically, and insensitive to delay and error.At present, MIMO, HARQ technology have been applied in the Enhanced Technology standard high speed downlink packet access (HSDPA) of 3G (Third Generation) Moblie WCDMA.

HARQ is applied to mimo system two kinds of implementations, a kind of method is after packet is multiplexed into all antenna branch, to every day the line branch road carry out forward error correction coding (FEC) and add Cyclic Redundancy Check, the performance of this method is more excellent, but need insert each branch road, operation such as control, so the complexity height.Another kind method is to carry out FEC and add CRC before packet is multiplexed into antenna, and this method implementation complexity is low, but performance is lower than the former.Because this method is used identical CRC to each antenna branch, because the gain difference of each path channels, the CRC of the subchannel that a certain channel gain is relatively poor makes mistakes, and will cause the re-transmission of all antenna branch bit streams, has reduced the performance of whole system.For this reason, the present invention proposes a kind of method, it to channel matrix decomposition after, the precoding battle array that utilize to obtain is done preliminary treatment and is realized channel compensation to transmitting, make the gain of each subchannel identical, and then improves systematic function.

The list of references tabulation:

[1] people such as A.J.Paularj is published in the article that is entitled as " An Overview of MIMOCommunications-A Key to Gigabit Wireless " on the Proceedings of IEEE, in February, 2004, the 92nd volume, No. 2, the 198th～218 page.

[2] article that is entitled as " The Geometric Mean Decomposition, Linear Algebra and ItsApplications " published in December, 2003 of Y.Jiang, W.W.Hager and J.Li.

[3] B.Hassibi is published in the article that is entitled as " A Fast Square-Root Implementation forBLAST " on the 1255th～1259 page of the 34th the Asilomar Conf. in November, 2000.

Summary of the invention

The object of the invention is to provide a kind of method and apparatus that is used for multiaerial system, uses this method and device thereof to have than the dominance energy, and the advantage that is easy to realize.

Thought of the present invention is to decompose and precoding by channel matrix being carried out geometric average, makes that the gain of each subchannel of antenna is identical.Like this, when each antenna branch adopts identical modulation constellation, the FEC coded data that system sends, the error rate of CRC sequence have been reduced; And system adopts emission, the reception Combined Treatment of closed loop, has reduced system capacity loss.

To achieve these goals and thought, according to a first aspect of the invention, a kind of mixed automatic retransmission request method based on many antennas input and output channel decomposing has been proposed, comprise step: at receiving terminal, channel matrix is carried out geometric average to be decomposed, obtain pre-coding matrix and zero setting weight vector generator matrix, pre-coding matrix is fed back to transmitting terminal, and utilize zero setting weight vector generator matrix to generate least mean-square error zero setting weight vector; At transmitting terminal, the emission packet is carried out forward error correction coding, add cyclic redundancy check (CRC), and utilize pre-coding matrix that the emission packet is carried out precoding; And, utilize each subchannel received signal and corresponding with it zero setting weight vector and subchannel gains at receiving terminal, and obtain each subchannel received signal, then, carry out forward error correction decoding, and utilize cyclic redundancy check (CRC) to detect the grouping quality; If packet is wrong, then retransmit, and the packet memory of will makeing mistakes merges laggard row decoding to the grouping of make mistakes retransmitted data packet and existing buffer memory at receiving terminal.

Preferably, at transmitting terminal, the emission pilot signal is to channel; And the gain coefficient of channel matrix is estimated at receiving terminal.

According to a second aspect of the invention, proposed a kind of mixed automatic retransmission request method of decomposing based on the delivery channel of many antenna inputs, comprise step: the emission pilot signal is to channel, and receiving terminal is estimated the gain coefficient of channel matrix; Channel matrix to order K carries out the geometric average decomposition to obtain zero setting weight vector generator matrix Q, R and pre-coding matrix P; P feeds back to transmitting terminal pre-coding matrix; The emission packet is carried out forward error correction coding and adds cyclic redundancy check (CRC); Utilize pre-coding matrix P that the emission packet is carried out linear predictive coding; Utilize the element of zero setting weight vector generator matrix Q and R to generate least mean-square error zero setting weight vector; Since K subchannel, multiply by corresponding zero setting weight vector with this subchannel received signal, obtain from the data of K width of cloth antenna emission, the data of this width of cloth antenna emission be multiply by corresponding subchannel gains, obtain the received signal of K subchannel, and from all received signals, deduct this signal, all received signals after obtaining upgrading; Upgrade K=K-1, and whether judge K, if then finish K＜1 less than 1; If K 〉=1,, proceed to calculate the processing of the received signal of K subchannel then at the K after upgrading; Carry out forward error correction decoding and utilize cyclic redundancy check (CRC) to detect the grouping quality; And if packet is wrong, then retransmit, and the packet memory of will makeing mistakes, is deciphered after receiving terminal merges the grouping of make mistakes retransmitted data packet and existing buffer memory at receiving terminal.

According to a third aspect of the invention we, proposed a kind of transmission processing unit that in many antennas input and output system, uses, having comprised: launched automatic repeat requests module, the emission packet is carried out forward error correction coding, and add cyclic redundancy check (CRC); And precoding module, utilize the pre-coding matrix that sends over from receiving terminal that the emission packet is carried out linear predictive coding.

According to a forth aspect of the invention, proposed a kind of reception processing unit that in many antennas input and output system, uses, having comprised: channel decomposing module, channel matrix is carried out geometric average decompose, obtain pre-coding matrix and zero setting weight vector generator matrix; Zero setting weight vector generation module utilizes zero setting weight vector generator matrix to generate least mean-square error zero setting weight vector; The iterative processing module is utilized each subchannel received signal and corresponding with it zero setting weight vector and subchannel gains, obtains each subchannel received signal; And receive automatic repeat requests module, carry out forward error correction decoding, and utilize cyclic redundancy check (CRC) to detect the grouping quality, if packet is wrong, then request retransmits, and the packet memory of will makeing mistakes merges laggard row decoding to the grouping of make mistakes retransmitted data packet and existing buffer memory at receiving terminal.

Preferably, the iterative processing module is since K subchannel, multiply by corresponding zero setting weight vector with this subchannel received signal, obtain from the data of K width of cloth antenna emission, the data of this width of cloth antenna emission be multiply by corresponding subchannel gains, obtain the received signal of K subchannel, and from all received signals, deducting this signal, all received signals after obtaining upgrading are upgraded K=K-1, and judge that whether K is less than 1, if then finish K＜1, if K 〉=1, then at the K after upgrading, proceed to calculate the processing of the received signal of K subchannel.

According to a fifth aspect of the invention, proposed a kind of many antennas input and output system and method for operation thereof, it is characterized in that comprising according to transmission processing unit of the present invention and reception processing unit.

Simultaneously, automatic retransmission request method proposed by the invention can be used for all multiple antenna communications, as the MIMO CDMA of single carrier and the MIMO OFDM of multicarrier etc.

Description of drawings

Below, with reference to the accompanying drawings, the preferred embodiments of the present invention are described in detail, wherein:

Fig. 1 shows the schematic diagram according to mimo system transmitting terminal of the present invention;

Fig. 2 shows the schematic diagram according to mimo system receiving terminal of the present invention;

Fig. 3 shows the flow chart according to mixed automatic retransmission request method of decomposing based on mimo channel of the present invention; And

Fig. 4 shows the schematic diagram of the comparative result of the present invention and prior art.

Embodiment

Below in conjunction with accompanying drawing the present invention is specified.Be noted that described embodiment only is for illustrative purposes, rather than limitation of the scope of the invention.

Consider a Single User MIMO communication system, it sends and receiving terminal is distinguished as illustrated in fig. 1 and 2, and transmitting terminal and receiving terminal are installed N respectively _TWidth of cloth antenna 103～103 ' and N _RWidth of cloth antenna 105～105 '.At transmitting terminal, packet is input to emission HARQ module 101, and this module 101 utilizes forward error correction that data are encoded, and encloses error detection occurs sequence C RC.Then, data flow is input to multiplexer 102, and multiplexer 102 is sent into each transmitting antenna Zhi Luduan 103～103 ' to symbols streams in the space division multiplexing mode, sends to channel through antenna 103～103 '.

At receiving terminal, the signal that every width of cloth antenna end 105～105 ' receives is sent into channel estimation module 106, and the pilot frequency sequence that this module utilizes every width of cloth antenna to receive is estimated channel gain.Demodulation multiplexer 107 outputs to after the signal parallel serial conversion and receives HARQ module 108.Receive in the HARQ module 108, utilize decoding FEC that data are decoded, and use crc check mistake, receive 108 controls of HARQ module or confirm that (ACK) receives bit error rate (or frame error rate) acceptable packet, or preferably by not sending confirmation signal or sending a negative affirmation (NACK) and come request retransmission.At transmission, receiving terminal combined apparatus 104,109～111, utilize channel estimation value, carry out a series of emissions, receive and handle, wherein finish pretreatment operation at transmitting terminal, finish post-processing operation at receiving terminal.

Following surface analysis channel decomposing realizes the principle of channel compensation.For general mimo system, received signal is

y＝Hx+n (1)

In the formula, y is N _R* 1 dimension received signal vector, emission signal vector $x\∈C^{N_T\×1}$ Variance be σ _x ²I, the variance of white Gauss noise vector n is σ _n ²So I is signal to noise ratio $\mathrm{SNR}={\mathrm{\σ}}_x^2/{\mathrm{\σ}}_n^2=1/\mathrm{\α}.$ Channel matrix $H\∈C^{N_R\×N_T}(N_T\≤N_R)$ Order be K=N _T, the element h among the H _JiBe the channel fading coefficient of transmitting antenna i to reception antenna j.

For the space division multiplexing mimo system, when transmitting terminal unknown channel state information (CSI), general received signal detection method is serial zero setting, deletion algorithm.For example, from N _TWidth of cloth antenna begins, and utilizes linear equalization methods such as (as matched filtering, balanced, least mean-square error (MMSE) equilibriums of ZF (ZF)) to recover transmitting of this width of cloth antenna; From received signal, deduct from N _TBehind the signal of width of cloth antenna emission, continue from N _T-1 width of cloth antenna begins, and recovers this width of cloth aerial signal; Handle successively, up to the received signal that recovers last width of cloth antenna.This processing method is a kind of open loop mode of operation, has certain system capacity loss.After receiving terminal obtains channel gain information and feeds back to transmitting terminal, i.e. sending and receiving letter end all obtains channel condition information, and then system works is under closed loop mode.At this moment, can adopt following equivalent process method.

Channel matrix H is carried out the QR decomposition to be obtained:

$H=Q_{N_T\×K}{R}_{K\×K}---\left(2\right)$

In the formula, Q _{NT * K}Be row orthogonal matrix, R _{K * K}Be upper triangular matrix.So formula (1) is rewritten as,

y＝QRx+n (3)

Formula (3) both sides are with multiply by Q ^H, () ^HExpression Hermitian transposition (complex conjugate) obtains

y＝Rx+ n (4)

Expansion is

Carry out serial signal according to formula (5) and detect, promptly all K subchannel is begun, calculate ${\stackrel{\‾}{x}}_i\←({\stackrel{\‾}{y}}_i-\underset{j=i+1}{\overset{K}{\mathrm{\Σ}}}{r}_{\mathrm{ij}}{\stackrel{\‾}{x}}_j)/r_{\mathrm{ii}},$ And it is mapped as demodulation symbol.

Can see that decompose by the QR to channel matrix H, mimo channel is broken down into K parallel sub-channels, promptly

y _i＝r _iix _i+ n _i，i＝1，2，…，K。(6)

At last, utilize general ZF (ZF) equalization methods restoring signal.Though it is a kind of closed-loop process that channel QR is decomposed, and has the shortcoming of system capacity loss in order to the ZF method of restoring signal.And studies show that of list of references [3] adopts the balanced restoring signal of MMSE can not bring system capacity loss, at this moment, to the zero setting weight vector of i transmitting antenna is

$w_i=r_{H_{a,\mathrm{ii}}}^{-1}{q}_{H_{a,i}}---\left(7\right)$

Here, earlier to augmented matrix $H_a=\left[\begin{array}{c}H\\ \sqrt{\mathrm{\α}}{I}_{N_T}\end{array}\right]$ Carrying out the QR branch solves $H_a=Q_{H_a}{R}_{H_a},$ { r _{Ha, ii}Be R _HaThe diagonal element of battle array, { q _{Ha, i}Be Q _HaThe column vector of battle array.

Can avoid capacitance loss though adopt the MMSE equilibrium, but decompose identically with the SVD of matrix, channel matrix is carried out after QR decomposes, each subchannel is the random fading feature, after the output stream that sends the ARQ module is sent into each antenna branch end, the deep fade subchannel will reduce the entire system performance.For this reason, in the present invention, the geometric average that adopts list of references [2] to be proposed is decomposed (GMD) method, and channel matrix is decomposed.Because the zero setting weight vector of MMSE relates to the augmented matrix of H, so at first construct augmented matrix

$H_a=\left[\begin{array}{c}H\\ \sqrt{\mathrm{\α}}{I}_{N_T}\end{array}\right]---\left(8\right)$

To channel matrix H _aCarrying out geometric average decomposes

$H_a=Q_{H_a}{R}_{H_a}{P}_{H_a}^H---\left(9\right)$

Here, Q _Ha, P _HaIt is respectively the semi-unitary matrix that carries out pre-filtering and back Filtering Processing at emission, receiving terminal; Upper triangular matrix R _HaEqual diagonal element r is arranged _Ii=λ, lambda definition is

$\stackrel{\‾}{\mathrm{\λ}}={\left(\underset{k=1}{\overset{K}{\mathrm{\Π}}}{\mathrm{\λ}}_k\right)}^{1/K}---\left(10\right)$

Wherein, λ _kFor channel matrix H being carried out the diagonal matrix diag[γ that characteristic value decomposition (SVD) obtains ₁γ _K] the non-zero diagonal element, i.e. the nonzero eigenvalue of H.As seen, decompose by GMD, the diagonal element of the matrix R that obtains is the geometrical mean of the characteristic value of H, makes each subchannel gains identical, so can reduce because the different influences to the entire system performance of each subchannel decline.The realization of GMD can be finished by symmetry displacement and a pair of Givens rotary manipulation.

Utilize the Q that obtains _H, R _HThe element substitution formula (7) of battle array is tried to achieve the zero setting weight vector w of MMSE, recovers to transmit according to general serial zero setting, deletion algorithm again.

According to above analysis,, mixed automatic retransmission request method of decomposing based on mimo channel according to the present invention is described in detail with reference to figure 3.

At step S001, the emission pilot signal is to channel, and receiving terminal is estimated the gain coefficient of channel matrix;

At step S002, the channel matrix of order K is carried out geometric average decompose and obtain matrix Q, R and P;

At step S003, P feeds back to transmitting terminal the precoding battle array;

At step S004, the emission packet is carried out forward error correction coding and adds CRC;

At step S005, utilize matrix P that the emission packet is carried out linear predictive coding;

At step S006, utilize the element of matrix Q, R to generate MMSE zero setting weight vector;

At step S007,, multiply by corresponding zero setting weight vector with this subchannel received signal and obtain from the data of K width of cloth antenna emission since K subchannel.The data of this width of cloth antenna emission be multiply by corresponding subchannel gains obtain K subchannel received signal, and all received signals when from all received signals, deducting this signal and obtaining next iteration;

At step S008, upgrade K=K-1, and whether judge K, if then finish K＜1 less than 1; If K 〉=1 then forwards step S007 to and carries out iterative processing.

At step S009, receive ARQ and FEC is deciphered and utilize CRC detection grouping quality.If packet is wrong, then retransmit; And the packet memory of will makeing mistakes, is deciphered after receiving terminal merges the grouping of make mistakes retransmitted data packet and existing buffer memory at receiving terminal.

Specifically, the emission Combined Treatment in the mimo system, emission HARQ, receive Combined Treatment, receive the HARQ device in order to realize said method, it is identical with HARQ device in the general communication system wherein to launch, receive the HARQ device, repeats no more.Emission, receiving terminal combined apparatus comprise with lower module shown in each module in the frame of broken lines among Fig. 1,2: channel decomposing module 109, and channel matrix is carried out geometric average decompose; Precoding module 104, the precoder P that utilizes matrix decomposition to obtain carries out linear predictive coding to transmitting; Zero setting weight vector generation module 110 is used to produce MMSE zero setting weight vector; Iterative processing module 111 is carried out the iterative processing algorithm of signal processing restoring signal, and judges whether that the signal of finishing all antenna end emissions recovers.

In conjunction with Fig. 1, Fig. 2 and Fig. 3, the operation of mimo system proposed by the invention is described below.

Transmitting terminal emission pilot signal is to channel, and receiving terminal is estimated the gain coefficient of channel matrix.The channel matrix of 109 couples of order K of channel decomposing module carries out geometric average and decomposes, and obtains matrix Q, R and P.Receiving terminal feeds back to transmitting terminal to precoding battle array P.101 pairs of emissions of emission ARQ module packet carries out forward error correction coding and adds CRC.Finish multiplexing to each signal by multiplexer module 102.Then, precoding module 104 utilizes matrix P that the emission packet is carried out linear predictive coding.At receiving terminal, zero setting weight vector generation module 110 utilizes the element of matrix Q, R to generate MMSE zero setting weight vector.Iterative processing module 111 is since K subchannel, multiply by the corresponding zero setting weight vector that provides by zero setting weight vector generation module 110 with this subchannel received signal, obtain from the data of K width of cloth antenna emission, then, the data of this width of cloth antenna emission be multiply by corresponding subchannel gains, obtain K subchannel received signal, and from all received signals, deduct this signal, all received signals when obtaining next iteration, then, upgrade K=K-1, and whether judge K, if K＜1, then end process less than 1, if K 〉=1 is proceeded to handle at the K after upgrading.Each signal that 106 pairs of demultiplexing module receive carries out demultiplexing.Receive 108 pairs of FEC decodings of ARQ module and utilize CRC to detect the grouping quality.If packet is wrong, just retransmit; And the packet memory of will makeing mistakes merges laggard row decoding to the grouping of make mistakes retransmitted data packet and existing buffer memory at receiving terminal at receiving terminal.

Fig. 4 shows the simulation result according to the operating characteristics of system of the present invention.Simulation parameter is: transmission, reception antenna number average are 4; The BPSK modulation; 1/2 code rate convolutional encoding; Maximum retransmission is 2; The flat Rayleigh fading channel.Performance of BER as shown in Figure 4.Can see that the system that decomposes with the mimo channel that does not adopt ARQ compares, ARQ is more excellent with the system BER performance that the mimo channel decomposition combines.

In the present invention, line branch road every day of mimo system is adopted identical modulation system, and every day, the line branch road distributed equal-wattage.Decompose and precoding by the mimo channel matrix being carried out geometric average, make each subchannel gains of antenna identical.Therefore, reduced have the deep fading subchannel to the influence of (comprising FEC coded data, CRC etc.) of data flow transmitted on it.And, adopt MMSE zero setting weight vector equilibrium treatment according to system of the present invention, reduced system capacity loss.Therefore, mixed automatic retransmission request method, mimo system, transmitting terminal and receiving terminal based on the mimo channel decomposition proposed by the invention can obtain the gain of power system capacity and performance of BER simultaneously, and have the advantage that is easy to realize.

Although illustrated and described the present invention at exemplary embodiments, will be understood by those skilled in the art that, under the situation that does not break away from the spirit and scope of the present invention, can carry out various other change, replacement and interpolations.Therefore, the present invention should not be understood that to be limited to above-mentioned particular instance, and should be limited by claims.

Claims (16)

1, a kind of mixed automatic retransmission request method based on many antennas input and output channel decomposing comprises step:

At receiving terminal, channel matrix is carried out geometric average decompose, obtain pre-coding matrix and zero setting weight vector generator matrix, pre-coding matrix is fed back to transmitting terminal, and utilize zero setting weight vector generator matrix to generate least mean-square error zero setting weight vector;

At transmitting terminal, the emission packet is carried out forward error correction coding, add cyclic redundancy check (CRC), and utilize pre-coding matrix that the emission packet is carried out precoding; And

At receiving terminal, utilize each subchannel received signal and corresponding with it zero setting weight vector and subchannel gains, obtain each subchannel received signal, then, carry out forward error correction decoding, and utilize cyclic redundancy check (CRC) to detect the grouping quality; If packet is wrong, then retransmit, and the packet memory of will makeing mistakes merges laggard row decoding to the grouping of make mistakes retransmitted data packet and existing buffer memory at receiving terminal.

2, the mixed automatic retransmission request method based on many antennas input and output channel decomposing according to claim 1 is characterized in that also comprising: at transmitting terminal, the emission pilot signal is to channel; And the gain coefficient of channel matrix is estimated at receiving terminal.

3, a kind of mixed automatic retransmission request method based on many antennas input and output channel decomposing comprises:

The emission pilot signal is to channel, and receiving terminal is estimated the gain coefficient of channel matrix;

The channel matrix of order K is carried out geometric average to be decomposed and obtains zero setting weight vector generator matrix Q, R and pre-coding matrix P;

P feeds back to transmitting terminal pre-coding matrix;

The emission packet is carried out forward error correction coding and adds cyclic redundancy check (CRC);

Utilize pre-coding matrix P that the emission packet is carried out linear predictive coding;

Utilize the element of zero setting weight vector generator matrix Q and R to generate least mean-square error zero setting weight vector;

Since K subchannel, multiply by corresponding zero setting weight vector with this subchannel received signal, obtain from the data of K width of cloth antenna emission, the data of this width of cloth antenna emission be multiply by corresponding subchannel gains, obtain the received signal of K subchannel, and from all received signals, deduct this signal, all received signals after obtaining upgrading;

Upgrade K=K-1, and whether judge K, if then finish K＜1 less than 1; If K 〉=1,, proceed to calculate the processing of the received signal of K subchannel then at the K after upgrading;

Carry out forward error correction decoding and utilize cyclic redundancy check (CRC) to detect the grouping quality; And

If packet is wrong, then retransmit, and the packet memory of will makeing mistakes, after merging the grouping of make mistakes retransmitted data packet and existing buffer memory, is deciphered receiving terminal at receiving terminal.

4, a kind of transmission processing unit that uses in many antennas input and output system comprises:

Launch automatic repeat requests module (101), the emission packet is carried out forward error correction coding, and add cyclic redundancy check (CRC); And

Precoding module (104) utilizes the pre-coding matrix that sends over from receiving terminal that the emission packet is carried out linear predictive coding.

5, transmission processing unit according to claim 4 is characterized in that described transmission processing unit is applied to many antennas input and output code division multiple access system.

6, transmission processing unit according to claim 4 is characterized in that described transmission processing unit is applied to many antennas input and output ofdm system.

7,, it is characterized in that described transmission processing unit is arranged in base station or portable terminal according to the described transmission processing unit of one of claim 4 to 6.

8, a kind of reception processing unit that uses in many antennas input and output system comprises:

Channel decomposing module (109) is carried out geometric average to channel matrix and is decomposed, and obtains pre-coding matrix and zero setting weight vector generator matrix;

Zero setting weight vector generation module (110) utilizes zero setting weight vector generator matrix to generate least mean-square error zero setting weight vector;

Iterative processing module (111) is utilized each subchannel received signal and corresponding with it zero setting weight vector and subchannel gains, obtains each subchannel received signal; And

Receive automatic repeat requests module (108), carry out forward error correction decoding, and utilize cyclic redundancy check (CRC) to detect the grouping quality, if packet is wrong, then request retransmits, and the packet memory of will makeing mistakes merges laggard row decoding to the grouping of make mistakes retransmitted data packet and existing buffer memory at receiving terminal.

9, reception processing unit according to claim 8, it is characterized in that described iterative processing module (111) is since K subchannel, multiply by corresponding zero setting weight vector with this subchannel received signal, obtain from the data of K width of cloth antenna emission, the data of this width of cloth antenna emission be multiply by corresponding subchannel gains, obtain the received signal of K subchannel, and from all received signals, deducting this signal, all received signals after obtaining upgrading are upgraded K=K-1, and judge that whether K is less than 1, if then finish K＜1, if K 〉=1, then at the K after upgrading, proceed to calculate the processing of the received signal of K subchannel.

10, according to Claim 8 or 9 described reception processing units, it is characterized in that described reception processing unit is applied to many antennas input and output code division multiple access system.

11, according to Claim 8 or 9 described reception processing units, it is characterized in that described reception processing unit is applied to many antennas input and output ofdm system.

12, according to Claim 8 to one of 11 described reception processing units, it is characterized in that described reception processing unit is arranged in portable terminal or base station.

13, a kind of many antennas input and output system is characterized in that comprising transmission processing unit according to claim 4 and reception processing unit according to claim 8.

14, the method for operation of many antennas input and output according to claim 13 system is characterized in that comprising:

Channel decomposing module (109) is carried out the geometric average decomposition to channel matrix, obtains pre-coding matrix and zero setting weight vector generator matrix;

Launch automatic repeat requests module (101) the emission packet is carried out forward error correction coding, and add cyclic redundancy check (CRC);

Precoding module (104) utilizes the pre-coding matrix that sends over from receiving terminal that the emission packet is carried out linear predictive coding;

Zero setting weight vector generation module (110) utilizes zero setting weight vector generator matrix to generate least mean-square error zero setting weight vector;

Iterative processing module (111) is utilized each subchannel received signal and corresponding with it zero setting weight vector and subchannel gains, obtains each subchannel received signal; And

Receive automatic repeat requests module (108) and carry out forward error correction decoding, and utilize cyclic redundancy check (CRC) to detect the grouping quality, if packet is wrong, then request retransmits, and the packet memory of will makeing mistakes merges laggard row decoding to the grouping of make mistakes retransmitted data packet and existing buffer memory at receiving terminal.

15, a kind of many antennas input and output system is characterized in that comprising transmission processing unit according to claim 4 and reception processing unit according to claim 9.

16, the method for operation of many antennas input and output according to claim 15 system is characterized in that comprising:

Channel decomposing module (109) is carried out the geometric average decomposition to channel matrix, obtains pre-coding matrix and zero setting weight vector generator matrix;

Launch automatic repeat requests module (101) the emission packet is carried out forward error correction coding, and add cyclic redundancy check (CRC);

Precoding module (104) utilizes the pre-coding matrix that sends over from receiving terminal that the emission packet is carried out linear predictive coding;

Zero setting weight vector generation module (110) utilizes zero setting weight vector generator matrix to generate least mean-square error zero setting weight vector;

Described iterative processing module (111) is since K subchannel, multiply by corresponding zero setting weight vector with this subchannel received signal, obtain from the data of K width of cloth antenna emission, the data of this width of cloth antenna emission be multiply by corresponding subchannel gains, obtain the received signal of K subchannel, and from all received signals, deduct this signal, all received signals after obtaining upgrading, upgrade K=K-1, and whether judge K, if K＜1 less than 1, then finish, if K 〉=1,, proceed to calculate the processing of the received signal of K subchannel then at the K after upgrading; And

Receive automatic repeat requests module (108) and carry out forward error correction decoding, and utilize cyclic redundancy check (CRC) to detect the grouping quality, if packet is wrong, then request retransmits, and the packet memory of will makeing mistakes merges laggard row decoding to the grouping of make mistakes retransmitted data packet and existing buffer memory at receiving terminal.

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