CN101039135A - Constellation rotation-based multi-antenna transmission method and system - Google Patents

Abstract

The invention discloses a constellation rotation based multi-antenna transmission method. In the method, the transmitting end transmits in parallel M path modulation symbol stream and conducts chunking, constellation rotation, IQ path separation, Q path interleaving, IQ paths combination and selected mapping to each symbol stream in sequence which is then transmitted. At the receiving end, the selected combination is conducted to the receiving signal firstly and each symbol block of the transmitting end is obtained which passes through the channel to correspond the receiving signal and then time and space combination MIMO detection is conducted. The invention through the constellation rotation and the Q path interleaving maps the same modulation symbol to two moments for transmission. Meanwhile the invention adopts the method of time interval transmission to the signals in the same symbol block thus reducing the correlation of the transmission channel in the same symbol block. Therefore, the invention can obtain the space diversity as well as the time diversity at the same time thus increasing the performance thereof.

Description

A kind of multi-antenna transmission method and system based on constellation rotation

Technical field

The present invention relates to the signal transmission technology in the mimo system.Particularly, relate to a kind of multi-antenna transmission method and system based on constellation rotation.

Background technology

Along with the fusion gradually of wireless network 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.Wherein many antennas input and output (MIMO) technology more and more is subjected to people's attention.

In mimo system, transmitting terminal utilizes many antennas to carry out the transmission of signal, and receiving terminal utilizes many antennas to carry out the reception of signal.Studies show that than traditional single antenna transmissions method, the MIMO technology can improve channel capacity significantly, thereby improve the rate of information throughput.In addition, transmission that mimo system adopts and reception antenna number the more, its available rate of information throughput is just higher.We know that it almost is infinitely available that the antenna resource in space is compared to running time-frequency resource, so the MIMO technology effectively broken through the bottleneck in traditional research, become one of core technology of next generation wireless communication system.

On sending method, mimo system can be rough is divided into two big classes: spatial multiplexing MIMO sends and space diversity MIMO transmission.In the spatial multiplexing MIMO transmitting system, the data that send on each antenna of transmitting terminal are separate, promptly are the send modes of a kind of full rate (being that the transmission intersymbol is irredundant on each antenna).But its shortcoming is to obtain space diversity, can't obtain time diversity.And send for space and time diversity MIMO, it carries out Space Time Coding to the transmission data earlier and it is sent again.By space and time diversity, make to send intersymbol and introduce information redundancy, thus both can space diversity on performance, can also obtain time diversity.Yet this sending method also has a shortcoming: efficiency of transmission has loss, can't realize that promptly full rate sends.

Figure 1 shows that traditional spatial multiplexing MIMO system configuration schematic diagram.

In this structure, transmitting terminal and receiving terminal adopt n respectively _TAnd n _RIndividual antenna carries out the transmission and the reception of signal.At transmitting terminal, data to be sent at first through chnnel coding 101 and constellation modulation 102, are divided into n through serial/parallel conversion 103 again _TCircuit-switched data stream sends the transmitting antenna of each substream of data from its correspondence then.At receiving terminal, at first by n _R Individual reception antenna 111 receives the whole signals in space.Then, according to the pilot signal in this received signal or adopt additive method to carry out channel estimating, (for mimo system, its characteristic of channel can be with a n to estimate current channel transfer functions matrix H by channel estimating unit 113 _R* n _TMatrix describe).Next, MIMO detecting unit 112 sends substream of data to each and detects according to characteristic of channel matrix H.Finally obtain original transmission data.

For MIMO detecting unit 112, in realization, can adopt several different methods, comprising: (1) Maximum Likelihood Detection (MLD); (2) linearity test method, as ZF (ZF), least mean-square error (MMSE) etc.; (3) Interference Cancellation detection method, as counteracting serial interference (SIC), Parallel Interference Cancellation (PIC) etc.

The front is mentioned, and sends for traditional spatial multiplexing MIMO as shown in Figure 1, and its advantage is to realize that full rate sends, and promptly obtains maximum efficiency of transmission.But because it is separate in the data that each sends constantly, therefore detect on the performance, can only obtain space diversity, and can't obtain time diversity (each moment independent detection when MIMO detects not need not temporal joint-detection yet) from MIMO.For this reason, how to design and a kind ofly can obtain the room and time diversity simultaneously, can realize that again the MIMO transmission means that full rate sends is to realize a future wireless important topic to be solved.

Summary of the invention

The object of the present invention is to provide a kind of MIMO transmission method of high performance, full rate.

According to first scheme of the present invention, a kind of multi-antenna transmission method based on constellation rotation has been proposed, may further comprise the steps; Data to be sent are carried out chnnel coding, constellation modulation and serial/parallel conversion, obtain the parallel stream of modulation symbols in M road, M is a natural number; At each road stream of modulation symbols, carry out concurrently that chunk, constellation rotation, quadrature separate, interweave, the quadrature union operation; According to time sequencing, choose M road stream of modulation symbols successively, each with the n in one tunnel stream of modulation symbols _TIndividual symbol is mapped to n one by one _TOn the individual transmitting antenna, send at synchronization, circulation is carried out this selection mapping and is sent; Pass through n _RIndividual reception antenna, n _RMore than or equal to n _T, the whole spacing waves that engrave when receiving a plurality of interval; Signal received, that have the room and time distribution is merged, recover the modulation symbol piece, simultaneously, carry out channel estimating, construct and the corresponding equivalent channel matrix of above-mentioned modulation symbol piece; And according to equivalent channel matrix, the modulation symbolic blocks is carried out space-time joint detect, recover original transmission data.

Preferably, at the performed chunk of each road stream of modulation symbols, constellation rotation, quadrature separate, interweave, the quadrature union operation is: according to order input time, according to the number n of transmitting antenna _T, with Nn _TIndividual symbol lengths is a block length, and stream of modulation symbols is carried out piecemeal, in each modulation symbol piece, comprises that N length is n _TThe sub-piece of individual symbol, n _TBe natural number, N is the natural number more than or equal to 2; Each modulation symbol is rotated predetermined constellation rotation angle θ; Each postrotational modulation symbol is separated into mutually orthogonal two-way component; At each modulation symbol piece Nn _TIn, at least one road in the two ways of separated component is interweaved, generate the two-way component after interweaving; And as the inverse operation of above-mentioned quadrature separating step, the two-way component after interweaving is merged, generate one road symbols streams to be mapped.

Preferably, at each modulation symbol piece Nn _TIn, at least one road in the two ways of separated component is interweaved, make after interweaving component with interweave before compare, in same height piece, do not have identical element.

Preferably, described method also comprises: according to channel status, choose the numerical value of M adaptively, when becoming very fast when channel, select less M value, and when becoming slow when channel, select bigger M value.Also preferably, according to the maximum doppler frequency f of channel _dWith the product of transmission time interval T, choose the numerical value of M.

According to alternative plan of the present invention, a kind of multi-antenna transmission method based on constellation rotation has been proposed, may further comprise the steps: data to be sent are carried out serial/parallel conversion, obtain M channel parallel data stream, M is a natural number; At each circuit-switched data stream, carry out concurrently that adaptive modulation and coding, chunk, constellation rotation, quadrature separate, interweave, the quadrature union operation; According to time sequencing, choose M road stream of modulation symbols successively, each with the n in one tunnel stream of modulation symbols _TIndividual symbol is mapped to n one by one _TOn the individual transmitting antenna, send at synchronization, circulation is carried out this selection mapping and is sent; Pass through n _RIndividual reception antenna, n _RMore than or equal to n _T, the whole spacing waves that engrave when receiving a plurality of interval; Signal received, that have the room and time distribution is merged, recover the modulation symbol piece, simultaneously, carry out channel estimating, construct and the corresponding equivalent channel matrix of above-mentioned modulation symbol piece; And according to equivalent channel matrix and by feedback channel parameter that determine, that adaptive modulation and coding adopted, the modulation symbolic blocks is carried out space-time joint detect, recover original transmission data.

According to third party's case of the present invention, a kind of multi-aerial transmission system has been proposed, comprising: channel coding device, carry out chnnel coding to data to be sent; The constellation modulating device carries out the constellation modulation to the data behind the coding; Serial/parallel converting means carries out serial/parallel conversion to the data after the constellation modulation, obtains the parallel stream of modulation symbols in M road, and M is a natural number; M chunk device respectively at each road stream of modulation symbols, carries out the chunk operation to described stream of modulation symbols; M pretreatment unit respectively at each road stream of modulation symbols, carries out concurrently that constellation rotation, quadrature are separated, interweaved, the quadrature union operation; Select mapping device,, choose M road stream of modulation symbols successively according to time sequencing, each with the n in one tunnel stream of modulation symbols _TIndividual symbol is mapped to n one by one _TOn the individual transmitting antenna, send at synchronization, circulation is carried out this selection mapping and is sent; Select to merge device, pass through n _RIndividual reception antenna, n _RMore than or equal to n _T, the whole spacing waves that engrave when receiving a plurality of interval, to received, have the signal that room and time distributes and merge, recover the modulation symbol piece; Channel estimating and equivalent channel construction device carry out channel estimating, construct and the corresponding equivalent channel matrix of above-mentioned modulation symbol piece; And the space-time joint checkout gear, according to equivalent channel matrix, the modulation symbolic blocks is carried out space-time joint detect, recover original transmission data.

Preferably, each in described M chunk device is according to order input time, according to the number n of transmitting antenna _T, with Nn _TIndividual symbol lengths is a block length, and stream of modulation symbols is carried out piecemeal, in each modulation symbol piece, comprises that N length is n _TThe sub-piece of individual symbol, n _TBe natural number, N is the natural number more than or equal to 2.

Also preferably, each in the described M pretreatment unit comprises: the constellation rotation device, rotate predetermined constellation rotation angle θ with each modulation symbol; The quadrature separator is separated into mutually orthogonal two-way component with each postrotational modulation symbol; Interlaced device is at each modulation symbol piece Nn _TIn, at least one road in the two ways of separated component is interweaved, generate the two-way component after interweaving; Quadrature merges device, as the corresponding intrument of above-mentioned quadrature separator, the two-way component after interweaving is merged, and generates one road symbols streams to be mapped.

According to cubic case of the present invention, a kind of multi-aerial transmission system has been proposed, comprising: serial/parallel converting means, data to be sent are carried out serial/parallel conversion, obtain M channel parallel data stream, M is a natural number; M adaptive modulation and coding device at each circuit-switched data stream, carried out adaptive modulation and coding respectively concurrently, generates stream of modulation symbols; M chunk device at each circuit-switched data stream, carries out the chunk operation to described stream of modulation symbols respectively concurrently; M pretreatment unit respectively at each circuit-switched data stream, carries out concurrently that constellation rotation, quadrature are separated, interweaved, the quadrature union operation; Select mapping device,, choose M road stream of modulation symbols successively according to time sequencing, each with the n in one tunnel stream of modulation symbols _TIndividual symbol is mapped to n one by one _TOn the individual transmitting antenna, send at synchronization, circulation is carried out this selection mapping and is sent; Select to merge device, pass through n _RIndividual reception antenna, n _RMore than or equal to n _T, the whole spacing waves that engrave when receiving a plurality of interval, to received, have the signal that room and time distributes and merge, recover the modulation symbol piece; Channel estimating and equivalent channel construction device carry out channel estimating, construct and the corresponding equivalent channel matrix of above-mentioned modulation symbol piece; And the space-time joint checkout gear, according to equivalent channel matrix, the modulation symbolic blocks is carried out space-time joint detect, recover original transmission data.

The invention discloses a kind of multi-antenna transmission method and system based on constellation rotation.Wherein, the parallel M road stream of modulation symbols that sends of transmitting terminal carries out successively to every road symbols streams that chunk, constellation rotation, IQ road separate, the Q road interweaves, the IQ road merges, select mapping, then it is sent.At receiving terminal, select at first to received signal to merge, obtain pairing received signal behind the symbolic blocks channel of the every road of transmitting terminal, then it is carried out space-time joint MIMO and detect.

The present invention interweaves by constellation rotation and Q road, same modulation symbol was mapped on 2 moment transmits.Simultaneously, take the method that sends blanking time, reduced the correlation of same interior transmission channel effectively for the signal in the prosign piece.Therefore, the present invention can obtain time diversity when obtaining space diversity, thereby obtains the raising of performance.

Description of drawings

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

Fig. 1 is traditional spatial multiplexing MIMO system configuration schematic diagram;

Fig. 2 is the mimo system structural representation according to the embodiment of the invention;

Fig. 3 is the detailed maps according to the transmitting terminal pretreatment unit 203 of the embodiment of the invention;

Fig. 4 is a detailed maps of selecting map unit 204 according to the transmitting terminal of the embodiment of the invention;

Fig. 5 is according to the operational flowchart of transmitting terminal in the embodiment of the invention to each symbols streams;

Fig. 6 is the constellation rotation schematic diagram;

Fig. 7 is for optimizing the flow chart of choosing of interlacing pattern;

Fig. 8 is for optimizing the schematic diagram of the example that interweaves;

Fig. 9 is for selecting the mapping flow chart;

Figure 10 is for selecting the schematic diagram of mapping input and output;

Figure 11 is the schematic diagram of the example of selection mapping result;

The schematic diagram that Figure 12 interweaves for the I road;

The schematic diagram that Figure 13 interweaves simultaneously for IQ;

Figure 14 is the operational flowchart according to receiving terminal in the embodiment of the invention;

Figure 15 is for selecting the detailed maps of merge cells 211;

Figure 16 is for selecting to merge the schematic diagram of input and output;

Figure 17 is the application schematic diagram of the present invention in adaptive MIMO systems;

Figure 18 is the performance comparative graph of the present invention and conventional method.

Embodiment

Below in conjunction with description of drawings the specific embodiment of the present invention.Be noted that described embodiment only is for illustrative purposes, rather than limitation of the scope of the invention.Described various numerical value is not to be used to limit the present invention, and these numerical value can carry out any suitable modification according to those of ordinary skills' needs.

Figure 2 shows that schematic diagram according to the mimo system structure of the embodiment of the invention.

In this structure, transmitting terminal and receiving terminal adopt n respectively _TAnd n _RIndividual antenna carries out the transmission and the reception of signal.At transmitting terminal, at first carry out chnnel coding 101, constellation modulation 102 and serial/parallel conversion 201 to sent data.After the serial/parallel conversion 201, obtain the parallel stream of modulation symbols in M road (M is a natural number).Next, concurrently every road symbols streams is carried out chunk 202 and preliminary treatment 203 operations.Chunk unit 202 with the serial symbol stream of its input by input time order be divided into some symbolic blocks, each symbolic blocks comprises Nn _TIndividual (N is the natural number more than or equal to 2) modulation symbol.At last, the symbolic blocks of M road after preliminary treatment 203 selected to shine upon 204, afterwards from n _TSend on the individual transmitting antenna 104.

At receiving terminal, at first by n _RWhole spacing waves that individual reception antenna 111 engraves during with some intervals receive.Then, by selecting merge cells 211 that the signal on these times and the space is selected to merge, recover the every road of transmitting terminal symbolic blocks pairing received signal behind mimo channel.Simultaneously, need or adopt additive method to carry out channel estimating, estimate the mimo channel transfer function matrix H on these times of reception according to the pilot signal in this received signal.Next, construct and the corresponding equivalent channel matrix of each road symbolic blocks by equivalent channel matrix construction unit 213, and by uniting MIMO detecting unit 212 according to this equivalence characteristic of channel matrix, successively data in each piece are carried out space-time joint and detect, finally obtain original transmission data.

With regard to transmitting terminal, method of the present invention and conventional method have 3 different:

(1) transmitting terminal is parallel sends M road stream of modulation symbols, and the parallel n that sends in the unorthodox method _TThe road symbols streams that is to say that the parallel symbol fluxion that sends need not be limited in the same with number of transmit antennas here.Accordingly, serial/parallel unit 201 is output as M road parallel symbol stream, and M value size is given by system here, the method that can adopt fixed value or self adaptation to choose, and the back will provide example in the literary composition.

(2), carry out chunk 202 and preliminary treatment 203 operations to the M road parallel symbol stream of serial/parallel unit 201 outputs.

(3), before sending, select to shine upon 204 to the symbolic blocks of M road after preliminary treatment 203.

Correspondingly, the difference in receiving terminal of the present invention and prior art comprises:

(1) selects union operation 211, engrave all spacing waves that receive when promptly receiving terminal is to the interval and select to merge, recover the every road of transmitting terminal symbolic blocks pairing received signal behind mimo channel.

(2) space-time joint MIMO detects 212.The received signal that engraves during to each in the conventional method is carried out independent MIMO and is detected, and the received signal that engraves during to the interval among the present invention is carried out joint-detection.

Particularly, pretreatment unit among Fig. 2 203 and selection map unit 204 can constitute in further detail as shown in Figure 3 and Figure 4.

Figure 3 shows that the detailed maps of transmitting terminal pretreatment unit 203.

Figure 4 shows that the detailed maps of transmitting terminal selection map unit 204.

Among Fig. 3, its input signal is the output of every road symbols streams after chunk operation 202 among Fig. 2, and promptly length is Nn _TSymbolic blocks.The operation of pretreatment unit 203 shown in Figure 3 comprises: constellation rotation 301, and the IQ road separates 302, and the Q road interweaves 303, and the IQ road merges 304.

Among Fig. 4, its input signal is that flow through chunk and pretreated output symbol on the M road among Fig. 2.Selection map unit 204 shown in Figure 4 comprises that sub-stream chooses 401 and 402 two unit of serial/parallel conversion.

Further, the transmitting terminal among the present invention can be described with flow chart shown in Figure 5 the operation of each symbols streams of serial/parallel conversion 201 outputs among Fig. 2.

Figure 5 shows that transmitting terminal among the present invention is to the operational flowchart of each symbols streams.

(1) chunk operation is shown in S501.With reference to figure 2, after the serial/parallel conversion 201 in Fig. 2, at first the parallel symbol stream to output carries out chunk operation 202.Chunk operation 202 to the serial symbol stream of its input by input time order carry out piecemeal, each symbolic blocks comprises Nn _TIndividual modulation symbol.We are with the signal of serial/parallel conversion 201 back m road symbols streams behind piecemeal, and promptly m road symbolic blocks is used $S_m=\{s_{m,0},s_{m,1},s_{m,2},...,s_{m,{\mathrm{Nn}}_T-1}\}$ Represent, m=0 wherein, 1 ..., M-1.

(2) constellation rotation operation is shown in S502.On realizing, constellation rotation promptly is the phase place rotation θ radian to each modulation symbol of input, for m road symbolic blocks $S_m=\{s_{m,0},s_{m,1},s_{m,2},...,s_{m,{\mathrm{Nn}}_T-1}\}$ , it is output as after constellation rotation ${\hat{S}}_m=\{{\hat{s}}_{m,0},{\hat{s}}_{m,1},{\hat{s}}_{m,2},...,{\hat{s}}_{m,{\mathrm{Nn}}_T-1}\},$  wherein _{M, i}=s _{M, i}e ^{J θ}, i=0,1 ..., Nn _TThe θ value is generally by system's initial setting.

Figure 6 shows that the constellation rotation schematic diagram.

Wherein the part on the left side is the preceding QPSK modulation constellation of constellation rotation among the figure, and the part on the right is the QPSK modulation constellation after the constellation rotation among the figure.

(3) IQ road lock out operation is shown in S503.The modulation signal of base band is generally described with the form of plural number in the communication system.For a complex symbol s, IQ represents on the road its corresponding homophase and quadrature component, i.e. real part and imaginary part.After separated on the IQ road, the I road of complex symbol s was R (s), and the Q road is I (s), and wherein R (.) and I (.) represent real and imaginary part respectively, and s=R (s)+jI (s) is arranged simultaneously.Thus, the m road symbolic blocks after the constellation rotation ${\hat{S}}_m=\{{\hat{s}}_{m,0},{\hat{s}}_{m,1},{\hat{s}}_{m,2},...,{\hat{s}}_{m,{\mathrm{Nn}}_T-1}\}$ After separated on the IQ road, its I road was output as $R\left({\hat{S}}_m\right)=\{R\left({\hat{s}}_{m,0}\right),R\left({\hat{s}}_{m,1}\right),R\left({\hat{s}}_{m,2}\right),...,R\left({\hat{s}}_{m,{\mathrm{Nn}}_T-1}\right)\},$ Its Q road is output as $I\left({\hat{S}}_m\right)=\{I\left({\hat{s}}_{m,0}\right),I\left({\hat{s}}_{m,1}\right),I\left({\hat{s}}_{m,2}\right),...,I\left({\hat{s}}_{m,{\mathrm{Nn}}_T-1}\right)\}.$

(4) the Q road interweaves, shown in S504.In this step, weaving length equaled block length Nn when Q road signal was interweaved _T, deinterleaving method has two kinds: generally interweave and optimization interweaves.

For generally interweaving, promptly be to adopt any traditional deinterleaving method that Q road signal is interweaved.Suppose that the interlacing pattern that adopts is P={k here ₀, k ₁, k ₂..., k _NnT-1, P be sequence 0,1,2 ..., n _TA kind of scramble result of-1}.Then after generally interweaving, the output of Q road by $I\left({\hat{S}}_m\right)=\{I\left({\hat{s}}_{m,0}\right),I\left({\hat{s}}_{m,1}\right),I\left({\hat{s}}_{m,2}\right),...,I\left({\hat{s}}_{m,{\mathrm{Nn}}_T-1}\right)\}$ Become $P\left\{I\left({\hat{S}}_m\right)\right\}=\{I\left({\hat{s}}_{m,k0}\right),I\left({\hat{s}}_{m,k1}\right),I\left({\hat{s}}_{m,k2}\right),...,I\left({\hat{s}}_{m,k({\mathrm{Nn}}_T-1)}\right)\}.$

Optimize the difference that interweaves with generally interweaving and be that increased the process of choosing to interlacing pattern P before interweaving, its criterion of choosing is: compare after interweaving with before interweaving, with there not being identical element in the sub-piece.Here adjacent n _TIndividual element is a sub-piece.

Figure 7 shows that the flow chart of choosing of optimizing interlacing pattern.

When initial, known parameters N and n _T, its implication is the same.Known natural order sequence P ₀, its length is Nn _T, P is promptly arranged ₀=0,1,2 ..., Nn _T-1} is as S701.In optimization interlacing pattern shown in Figure 7 was chosen, at first producing length was Nn _TInterlacing pattern P, it can be the interlacing pattern under any tradition interweaves, shown in step S702.Then, interlacing pattern P is divided into N sub-piece, adjacent n _TIndividual element is a sub-piece, shown in step S703.Next, compare P and P ₀In corresponding sub block, have identical element as both, then think P unoptimizable interlacing pattern, need choose again; If P and P ₀In corresponding sub-piece all do not have identical element, think that then P optimizes interlacing pattern, the whole process of choosing finishes.Shown in step S704～708.

The process of choosing about to interlacing pattern P is described as follows:

Suppose N=3, n _T=3, promptly block length is 9.Be designated as P under the sequence before supposing to interweave ₀={ 0,1,2,3,4,5,6,7,8} is designated as P={k under the sequence after interweaving ₀, k ₁, k ₂, k ₃, k ₄, k ₅, k ₆, k ₇, k ₈.Investigating at first this sequence is carried out the molecule piece when whether interlacing pattern P satisfies the optimization criterion.P ₀Behind the molecule piece, become { (0,1,2), (3,4,5), (6,7,8) }, P ₀After grouping, become { (k ₀, k ₁, k ₂), (k ₃, k ₄, k ₅), (k ₆, k ₇, k ₈), the number of its neutron piece is N, sub-block length is n _TAt this moment, as if a certain sub-piece and P among the P ₀In corresponding sub-piece have identical element, think that then this interlacing pattern does not meet the optimization criterion, need choose again.

Figure 8 shows that and optimize the example that interweaves.

Among Fig. 8, provide following two examples.

Example one: if P={ (5,7,8), (4,2,6), (1,3,0) }, wherein first sub-piece (5,7,8) and P ₀In the first sub-piece (0,1,2) do not have identical element, the 3rd sub-piece (1,3,0) and P ₀In the 3rd sub-piece (6,7,8) do not have identical element, but second sub-piece (4,2,6) and P yet ₀In the second sub-piece (3,4,5) have identical element 4, think that then this interlacing pattern P does not meet the optimization criterion, need choose again.

Example two: if P={ (5,7,8), (1,2,6), (4,3,0) }, arbitrary sub-piece and P among the visible P at this moment ₀There is not identical element in middle corresponding sub block, therefore satisfies and optimizes criterion, can use.

(5) IQ road union operation is shown in S505.It is the inverse operation that S503 is separated on the IQ road that the IQ road merges.Merge through IQ, obtain

${S^{\′}}_m=R\left({\hat{S}}_m\right)+\mathrm{jP}\left\{I\left({\hat{S}}_m\right)\right\}$

$=\{{s^{\′}}_{m,0},{s^{\′}}_{m,1},...,{s^{\′}}_{m,\mathrm{NnT}-1}\}$

$=\{R\left({\hat{s}}_{m,0}\right)+\mathrm{jI}\left({\hat{s}}_{m,k0}\right),R\left({\hat{s}}_{m,1}\right)+\mathrm{jI}\left({\hat{s}}_{m,k1}\right),...,R\left({\hat{s}}_{m,{\mathrm{Nn}}_T-1}\right)+\mathrm{jI}\left({\hat{s}}_{m,k({\mathrm{Nn}}_T-1)}\right)\}$

(6) select mapping and forwarding step, shown in S506 and S507.With reference to figure 4, as previously mentioned, selection map unit shown in Figure 4 comprises that sub-stream chooses 401 and 402 two unit of serial/parallel conversion.Particularly, sub-stream is chosen unit 401 and successively the M road signal of input is chosen in time, and choose length is n at every turn _TSignal output give serial/parallel converter unit 402.Described in the selection mapping that sends symbolic blocks, select map unit with all M road signal (every block length Nn _T) common MNn _TIndividual sign map engraves during to MN continuous in time and sends, and each sends n constantly _TIndividual symbol, in when mapping, require same data map at interval the time engrave, promptly the interval the time engrave transmission, such as, the Nn on the piece 0 _TIndividual symbol is constantly 0, M, and 2M ..., (N-1) M goes up and sends, and each sends n constantly _TIndividual symbol; Nn on the piece 1 _TIndividual symbol is constantly 1, M+1, and 2M+1 ..., (N-1) M+1 goes up and sends, and each sends n constantly _TIndividual symbol; The rest may be inferred.

Figure 9 shows that the flow chart of selecting mapping.

Wherein, choose M son stream (circulation is carried out) successively, it is carried out serial/parallel conversion export then, as S801～S806.Wherein, choose at every turn, the length of serial/parallel conversion is n _T

Figure 10 shows that and select mapping input and output schematic diagram.

Among Figure 10, the supposing the system parameter is M=4, N=2, n _T=3, select the input of mapping that M=4 road signal is arranged, every road symbol block length is Nn _T=6, wherein the 1 road symbolic blocks be expressed as A0, A1 ..., A5}, the 2 road symbolic blocks be expressed as B0, B1 ..., B5}, the 3 road symbolic blocks be expressed as C0, C1 ..., C5}, the 4 road symbolic blocks be expressed as D0, D1 ..., D5}.When selecting to shine upon, sub-stream is chosen the preceding n that the 1 road signal is at first chosen in unit 401 _T{ A2} carries out serial/parallel conversion with it and exports each transmitting antenna to=3 symbols then for A0, A1; Choose the preceding n of the 2 road signal then _T{ B2} carries out it serial/parallel conversion output to=3 symbols then for B0, B1; Choose the preceding n of the 3 road signal again _T{ C2} carries out it serial/parallel conversion output to=3 symbols then for C0, C1; Choose the preceding n of the 4 road signal again _T{ D2} carries out it serial/parallel conversion output to=3 symbols then for D0, D1; Next choose the back n of the 1 road signal again _T{ A5} carries out it serial/parallel conversion output to=3 symbols then for A3, A4; The rest may be inferred.Thus, each constantly at last, the transmission signal form on each antenna is shown in the part on the right among Figure 10.

Consider the general parameters situation, the operation of selecting mapping to finish is with all M road signal (every block length Nn _T) common MNn _TIndividual sign map engraves during to MN continuous in time and sends, and each sends n constantly _TIndividual symbol.In when mapping, require same data map at interval the time engrave, promptly the interval the time engrave transmission.Such as, the Nn on the piece 0 _TIndividual symbol is constantly 0, M, and 2M ..., (N-1) M goes up and sends, and each sends n constantly _TIndividual symbol; Nn on the piece 1 _TIndividual symbol is constantly 1, M+1, and 2M+1 ..., (N-1) M+1 goes up and sends, and each sends n constantly _TIndividual symbol; The rest may be inferred.

Consider following system parameters: M=4, N=2, n _T=2.Wherein m road symbolic blocks is expressed as S _m={ s _{M, 0}, s _{M, 1}, s _{M, 2}, s _{M, 3}, m=0 wherein, 1,2,3.This signal is successively through constellation rotation, and separate on the IQ road, and the Q road interweaves, and the IQ road obtains S ' after merging _m={ R ( _{M, 0})+jI ( _{M, k0}), R ( _{M, 1})+jI ( _{M, k1}), R ( _{M, 2})+jI ( _{M, k2}), R ( _{M, 3})+jI ( _{M, k3}).So, after S506 selects map operation, send in as shown in Figure 8 mode.Promptly the 0th constantly send the 0th preceding 2 (be n _T) individual symbol, the 1st sends preceding 2 symbols of the 1st constantly, and the 2nd sends preceding 2 symbols of the 2nd constantly, and the 3rd sends preceding 2 symbols of the 3rd constantly; The 4th sends back 2 symbols of the 0th constantly, and the 5th sends back 2 symbols of the 1st constantly, and the 6th sends back 2 symbols of the 2nd constantly, and the 7th sends back 2 symbols of the 3rd constantly.

Figure 11 shows that and select the mapping result example.

More than provided in the inventive method transmitting terminal to the operating process of each symbolic blocks.Wherein, about choosing of M and N numerical value, generally by system's initial setting.In addition, the M value method that also can adopt self adaptation to choose.In addition, in real system, the Q road interweaves also can be with the replacement that interweaves of I road, and all the other IQ separate, and IQ merges, and deinterleaving method is constant, perhaps adopts I and Q road interweaving method simultaneously.

Figure 12 shows that I road weaving diagram.

Figure 13 shows that IQ weaving diagram simultaneously.

Transmitting terminal m road symbolic blocks can be expressed as S ' _m=S ' _m(0), S ' _m(1) ..., S ' _m(N-1) }, S ' wherein _m(n) be S ' _mIn n length be n _TSub-piece, i.e. S ' _m(n)=S ' _m(nn _T), S ' _m(nn _T+ 1) ..., S ' _m(nn _T+ n _T-1) }.At receiving terminal, the selection mapping characteristics during according to foregoing send, the received signal that engraves in the time of can be with continuous N N is expressed as Y={Y ₀(0), Y ₁(0) ..., Y _M-1(0), Y ₀(1), Y ₁(1) ..., Y _M-1(1) ... }, Y wherein _m(n) correspond to transmission S ' _m(n) the reception vector the time, it is a n _R* 1 vector.

The transmission signal that engraves in the time of can be with this MN and the relation of received signal are described with following matrix form:

Y＝ H S+ N (1)

Wherein, Y=[Y ₀(0), Y ₁(0) ..., Y _M-1(0), Y ₀(1), Y ₁(1) ..., Y _M-1(1) ...] be the received signal matrix, its dimension is n _R* (MN); H=[H (0), H (1) ..., H (MN-1)] the mimo channel matrix that engraves when representing this MN, its dimension is n _R* (n _TMN), wherein H (j) represents j characteristic of channel matrix constantly; S=[(S ' ₀(0)) ^T, (S ' ₁(0)) ^T..., (S ' _M-1(0)) ^T, (S ' ₀(1)) ^T, (S ' ₁(1)) ^T..., (S ' _M-1(1)) ^T...] and for sending signal matrix, its dimension is n _T* (MN), () ^TThe expression transposition; N represents the additive white Gaussian noise (AWGN) of receiving terminal, and its dimension is n _R* (MN).

After receiving terminal received spacing wave, processing procedure to received signal can be with flow chart description shown in Figure 14.

Figure 14 shows that the operating process of receiving terminal among the present invention.

The operation of receiving terminal specifically comprises:

(A) select to merge, as S901.

This step promptly is to select the operation of merge cells 211 in the corresponding diagram 2.In brief, the operation of this step is an inverse operation of transmitting terminal being selected mapping process, promptly is will belong to same signal to reconfigure from all received signals, so that next to the joint-detection of each piece.The selection merge cells 211 of Fig. 2 can as Figure 10 in detail shown in.

Figure 15 shows that and select merge cells 211 refinement schematic diagrames.

Among Figure 15, select merge cells 211 to comprise parallel/serial converter unit 1001 reconciliation Multi-connection units 1002.Wherein, the n that at first receives by 1001 pairs of reception antennas of parallel/serial converter unit _RThe road parallel signal carries out parallel/serial conversion, successively the multiple connection operation is separated in the output of parallel/serial converter unit 1001 in time by separating Multi-connection unit 1002 then.Particularly, separating Multi-connection unit 1002 each collection length is n _TSignal, successively in each output branch road output, separating the corresponding output of Multi-connection unit branches is M then.Such as, the 1st length is n _TBlock on branch road 1, export, the 2nd length is n _TBlock on branch road 2, export, the rest may be inferred.

Figure 16 shows that and select to merge the input and output schematic diagram.

Among Figure 16, the supposing the system parameter is M=4, N=2, n _R=3.Receiving terminal engraves in the time of continuous N N=8, from n _RThe signal that receives on=3 reception antennas is shown in the part on the left side among Figure 16, and wherein transverse axis is a time shaft, and the longitudinal axis is a spatial axes.When selecting to merge, { A0, A1, A2} separate to be multiplexed in its 1st branch and export with the received signal on the moment 0; { B0, B1, B2} separate to be multiplexed in its 2nd branch and export with the received signal on the moment 1; { C0, C1, C2} separate to be multiplexed in its 3rd branch and export with the received signal on the moment 2; { D0, D1, D2} separate to be multiplexed in its 4th branch and export with the received signal on the moment 3.Continue repetitive operation then, promptly just constantly the received signal on 4 { A3, A4, A5} separate to be multiplexed in its 1st branch and export; The rest may be inferred.Thus, select the signal form of merge cells output at last shown in the right among Figure 16.

On mathematical form, the operation of selecting to merge promptly is with received signal Y=[Y in the formula (1) ₀(0), Y ₁(0) ..., Y _M-1(0), Y ₀(1), Y ₁(1) ..., Y _M-1(1) ...] make a distinction by the difference that sends symbolic blocks.Thus, obtaining the received signal that the m piece sends symbol is:

(2)

Y wherein _m=[(Y _m(0)) ^T, (Y _m(1)) ^T..., (Y _m(N-1)) ^T] ^TFor the transmission signal that engraves extraction all MN the time is m piece symbol S ' _m=S ' _m(0), S ' _m(1) ..., S ' _m(N-1) } received signal the time.

(B) ask equivalent channel, as S902.

Here, though obtained at m piece symbol S ' by formula (2) _m=S ' _m(0), S ' _m(1) ..., S ' _m(N-1) } characteristic of channel matrix

But because the transmission symbolic blocks S ' here _m=S ' _m(0), S ' _m(1) ..., S ' _m(N-1) } be through the symbols streams after a series of conversion, but not therefore original stream of modulation symbols can't directly utilize top channel matrix H here _mCarrying out MIMO detects.

In this step, wish formula (2) is transformed to the form of formula (3):

${\stackrel{\‾}{Y}}_m=\left[\begin{array}{c}{Y}_m\left(0\right)\\ Y_m\left(1\right)\\ \·\\ \·\\ \·\\ Y_m(N-1)\end{array}\right]=H_{\mathrm{eff}}S+{\stackrel{\‾}{N}}_m---\left(3\right)$

H wherein _EffBe with original symbol sequence S corresponding, can be directly used in the equivalent channel matrix that MIMO detects.

Obtain equivalent channel matrix H _Eff, the m piece in the formula (2) is sent symbol S ' _m=S ' _m(0), S ' _m(1) ..., S ' _m(N-1) } carry out conversion, have

${\left({S^{\′}}_m\right)}^T={[{S^{\′}}_m\left(0\right),{S^{\′}}_m\left(1\right),...,{S^{\′}}_m(N-1)]}^T$

$={[{s^{\′}}_{m,0},{s^{\′}}_{m,1},...,{s^{\′}}_{m,\mathrm{NnT}-1}]}^T$

$=R\left({[{s^{\′}}_{m,0},{s^{\′}}_{m,1},...,{s^{\′}}_{m,\mathrm{NnT}-1}]}^T\right)+\mathrm{jI}\left({[{s^{\′}}_{m,0},{s^{\′}}_{m,1},...,{s^{\′}}_{m,\mathrm{NnT}-1}]}^T\right)$

$=R\left({[{\hat{s}}_{m,0},{\hat{s}}_{m,1},...,{\hat{s}}_{m,\mathrm{NnT}-1}]}^T\right)+j\hat{P}I\left({[{\hat{s}}_{m,0},{\hat{s}}_{m,1},...,{\hat{s}}_{m,\mathrm{NnT}-1}]}^T\right)$

$=e^{\mathrm{j\θ}}\{R\left({[s_{m,0},s_{m,1},...,s_{m,\mathrm{NnT}-1}]}^T\right)+j\hat{P}I\left({[s_{m,0},s_{m,1},...,s_{m,\mathrm{NnT}-1}]}^T\right)\}$

Wherein,

For with the transmitting terminal Q road corresponding permutation matrix that interweaves, I _NnTBe Nn _TThe unit matrix of dimension.

With formula (4) substitution formula (2), then formula (3) becomes

${\stackrel{\‾}{Y}}_m=\left[\begin{array}{c}{Y}_m\left(0\right)\\ Y_m\left(1\right)\\ \·\\ \·\\ \·\\ Y_m(N-1)\end{array}\right]=H_{\mathrm{eff}}\left[\begin{array}{c}R\left(s_{m,0}\right)\\ \·\\ \·\\ \·\\ R\left(s_{m,\mathrm{NnT}-1}\right)\\ I\left(s_{m,0}\right)\\ \·\\ \·\\ \·\\ I\left(s_{m,\mathrm{NnT}-1}\right)\end{array}\right]+{\stackrel{\‾}{N}}_m---\left(5\right)$ (4)

Wherein, equivalent channel matrix is

(C) associating MIMO detects, as S903.

In this step, the equivalent channel matrix of gained adopts traditional MIMO detection method to the modulation symbol vector [R (s in the formula (5) above utilizing _{M, 0}) ..., R (s _{M, NnT-1}), I (s _{M, 0}) ..., I (s _{M, NnT-1})] detect.

Previously described operation from (B) to (C) is to carry out at single symbolic blocks, therefore for M symbolic blocks selecting merge cells output, needs the process of repetition (B) to (C), and promptly block-by-block carries out the MIMO detection.After all symbolic blocks detections finish, separate mediation decoding and obtain original transmitted information at last.

Mimo system structure of the present invention for shown in Fig. 2 also can change in real system to some extent.Consider to adopt among the MIMO situation of adaptive modulation and coding (AMC), promptly distinct symbols stream adopts the different modulation and the situation of coding parameter.Inventive method among Fig. 2 can be changed to shown in Figure 17.

Figure 17 shows that the application schematic diagram of the present invention in adaptive MIMO systems.

Compare with Fig. 2, the difference of Figure 17 only is, this moment, M parallel symbols streams adopted AMC but not coding and the modulation fixed among Fig. 2.Accordingly, receiving terminal has increased adaptive parameter selection unit and feedback channel.

In addition, the front is mentioned in real system, and M and N numerical value are generally by system's initial setting.Simultaneously, the M value method that also can adopt self adaptation to choose.Its basic thought is: become situation faster during for channel, choose less M value; Become slower situation during for channel, choose bigger M value.In real system, can be according to the f of reality _dTable look-up with the T size and to choose corresponding M value, wherein f _dBe maximum doppler frequency, T is the MIMO transmission time interval.

Table 1 is depicted as according to the system parameters self adaptation and chooses M value example.

Table 1

f dT	The numerical value of M
		[0，0.1]	8
(0.1，0.2]	4
		(0.2，0.5]	2
(0.5，∞)	1

The performance that Figure 18 shows that the method applied in the present invention and conventional method compares.

Having provided the BER performance that adopts under traditional MIMO transmission method and the inventive method in the emulation compares.Wherein, number of transmit antennas n _TBe 2, reception antenna is counted n _RBe 2.Channel adopts smooth mimo channel, and channel is independent between antenna, and N is 2, and M value (makes that the interchannel of M the delivery time in interval is uncorrelated on the time domain) enough greatly.Tradition and inventive method all adopt square QPSK modulation, and MIMO detects and is maximum likelihood (ML) detection.In addition, constellation rotation angle θ is 26.6 °.From the simulation result of Figure 18 as seen, inventive method can obtain more excellent BER performance.We think that the reason that performance improves in the inventive method has 4 points: (1) constellation rotation makes postrotational I road and Q road all comprise original two-way (I road and Q road) information; (2) the Q road interweaves and makes a complex symbol expand to two channel; (3) transmission lag is eliminated the channel time domain correlation; (4) receiving terminal adopts the associating MIMO on time domain and the spatial domain to detect.

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 (20)

1. multi-antenna transmission method based on constellation rotation may further comprise the steps:

Data to be sent are carried out chnnel coding, constellation modulation and serial/parallel conversion, obtain the parallel stream of modulation symbols in M road, M is a natural number;

At each road stream of modulation symbols, carry out concurrently that chunk, constellation rotation, quadrature separate, interweave, the quadrature union operation;

According to time sequencing, choose M road stream of modulation symbols successively, each with the n in one tunnel stream of modulation symbols _TIndividual symbol is mapped to n one by one _TOn the individual transmitting antenna, send at synchronization, circulation is carried out this selection mapping and is sent;

Pass through n _RIndividual reception antenna, n _RMore than or equal to n _T, the whole spacing waves that engrave when receiving a plurality of interval;

Signal received, that have the room and time distribution is merged, recover the modulation symbol piece, simultaneously, carry out channel estimating, construct and the corresponding equivalent channel matrix of above-mentioned modulation symbol piece; And

According to equivalent channel matrix, the modulation symbolic blocks is carried out space-time joint detect, recover original transmission data.

2. multi-antenna transmission method according to claim 1, it is characterized in that at the performed chunk of each road stream of modulation symbols, constellation rotation, quadrature separate, interweave, the quadrature union operation is:

According to order input time, according to the number n of transmitting antenna _T, with Nn _TIndividual symbol lengths is a block length, and stream of modulation symbols is carried out piecemeal, in each modulation symbol piece, comprises that N length is n _TThe sub-piece of individual symbol, n _TBe natural number, N is the natural number more than or equal to 2;

Each modulation symbol is rotated predetermined constellation rotation angle θ;

Each postrotational modulation symbol is separated into mutually orthogonal two-way component;

At each modulation symbol piece Nn _TIn, at least one road in the two ways of separated component is interweaved, generate the two-way component after interweaving; And

As the inverse operation of above-mentioned quadrature separating step, the two-way component after interweaving is merged, generate one road symbols streams to be mapped.

3. multi-antenna transmission method according to claim 2 is characterized in that described receiving step is: M and N according to transmitting terminal is provided with, pass through n _RIndividual reception antenna receives N the whole spacing waves that engrave at interval the time, described N M-1 moment at interval in twos constantly at interval.

4. multi-antenna transmission method according to claim 3 is characterized in that described equivalent channel matrix constitution step comprises: carry out channel estimating, estimate the transfer function matrix at above-mentioned N interval transmission channel on the moment; And, construct and the corresponding equivalent channel matrix of above-mentioned modulation symbol piece according to the transfer function matrix of transmission channel.

5. multi-antenna transmission method according to claim 2 is characterized in that at each modulation symbol piece Nn _TIn, at least one road in the two ways of separated component is interweaved, make after interweaving component with interweave before compare, in same height piece, do not have identical element.

6. multi-antenna transmission method according to claim 1 is characterized in that also comprising: according to channel status, choose the numerical value of M adaptively, when becoming very fast when channel, select less M value, and when becoming slow when channel, select bigger M value.

7. multi-antenna transmission method according to claim 6 is characterized in that the maximum doppler frequency f according to channel _dWith the product of transmission time interval T, choose the numerical value of M.

8. multi-antenna transmission method based on constellation rotation may further comprise the steps:

Data to be sent are carried out serial/parallel conversion, obtain M channel parallel data stream, M is a natural number;

At each circuit-switched data stream, carry out concurrently that adaptive modulation and coding, chunk, constellation rotation, quadrature separate, interweave, the quadrature union operation;

According to time sequencing, choose M road stream of modulation symbols successively, each with the n in one tunnel stream of modulation symbols _TIndividual symbol is mapped to n one by one _TOn the individual transmitting antenna, send at synchronization, circulation is carried out this selection mapping and is sent;

Pass through n _RIndividual reception antenna, n _RMore than or equal to n _T, the whole spacing waves that engrave when receiving a plurality of interval;

Signal received, that have the room and time distribution is merged, recover the modulation symbol piece, simultaneously, carry out channel estimating, construct and the corresponding equivalent channel matrix of above-mentioned modulation symbol piece; And

According to equivalent channel matrix and by feedback channel parameter that determine, that adaptive modulation and coding adopted, the modulation symbolic blocks is carried out space-time joint detect, recover original transmission data.

9. multi-antenna transmission method according to claim 8, at the performed chunk of each road stream of modulation symbols, constellation rotation, quadrature separate, interweave, the quadrature union operation is:

According to order input time, according to the number n of transmitting antenna _T, with Nn _TIndividual symbol lengths is a block length, and stream of modulation symbols is carried out piecemeal, in each modulation symbol piece, comprises that N length is n _TThe sub-piece of individual symbol, n _TBe natural number, N is the natural number more than or equal to 2;

Each modulation symbol is rotated predetermined constellation rotation angle θ;

Each postrotational modulation symbol is separated into mutually orthogonal two-way component;

At each modulation symbol piece Nn _TIn, at least one road in the two ways of separated component is interweaved, generate the two-way component after interweaving; And

As the inverse operation of above-mentioned quadrature separating step, the two-way component after interweaving is merged, generate one road symbols streams to be mapped.

10. multi-antenna transmission method according to claim 9 is characterized in that described receiving step is: M and N according to transmitting terminal is provided with, pass through n _RIndividual reception antenna receives N the whole spacing waves that engrave at interval the time, described N M-1 moment at interval in twos constantly at interval.

11. multi-antenna transmission method according to claim 10 is characterized in that described equivalent channel matrix constitution step comprises: carry out channel estimating, estimate transfer function matrix at above-mentioned N interval transmission channel on the moment; And, construct and the corresponding equivalent channel matrix of above-mentioned modulation symbol piece according to the transfer function matrix of transmission channel.

12. multi-antenna sending method according to claim 2 is characterized in that at each modulation symbol piece Nn _TIn, at least one road in the two ways of separated component is interweaved, make after interweaving component with interweave before compare, in same height piece, do not have identical element.

13. multi-antenna sending method according to claim 1 is characterized in that also comprising: according to channel status, choose the numerical value of M adaptively, when when channel, becoming very fast, select less M value, and when when channel, becoming slow, select bigger M value.

14. multi-antenna sending method according to claim 13 is characterized in that the maximum doppler frequency f according to channel _dWith the product of transmission time interval T, choose the numerical value of M.

15. a multi-aerial transmission system comprises:

Channel coding device carries out chnnel coding to data to be sent;

The constellation modulating device carries out the constellation modulation to the data behind the coding;

Serial/parallel converting means carries out serial/parallel conversion to the data after the constellation modulation, obtains the parallel stream of modulation symbols in M road, and M is a natural number;

M chunk device respectively at each road stream of modulation symbols, carries out the chunk operation to described stream of modulation symbols;

M pretreatment unit respectively at each road stream of modulation symbols, carries out concurrently that constellation rotation, quadrature are separated, interweaved, the quadrature union operation;

Select mapping device,, choose M road stream of modulation symbols successively according to time sequencing, each with the n in one tunnel stream of modulation symbols _TIndividual symbol is mapped to n one by one _TOn the individual transmitting antenna, send at synchronization, circulation is carried out this selection mapping and is sent;

Select to merge device, pass through n _RIndividual reception antenna, n _RMore than or equal to n _T, the whole spacing waves that engrave when receiving a plurality of interval, to received, have the signal that room and time distributes and merge, recover the modulation symbol piece;

Channel estimating and equivalent channel construction device carry out channel estimating, construct and the corresponding equivalent channel matrix of above-mentioned modulation symbol piece; And

The space-time joint checkout gear according to equivalent channel matrix, carries out space-time joint to the modulation symbolic blocks and detects, and recovers original transmission data.

16. multi-aerial transmission system according to claim 15 is characterized in that in described M the chunk device each is according to order input time, according to the number n of transmitting antenna _T, with Nn _TIndividual symbol lengths is a block length, and stream of modulation symbols is carried out piecemeal, in each modulation symbol piece, comprises that N length is n _TThe sub-piece of individual symbol, n _TBe natural number, N is the natural number more than or equal to 2.

17. multi-aerial transmission system according to claim 16 is characterized in that in the described M pretreatment unit each comprises:

The constellation rotation device rotates predetermined constellation rotation angle θ with each modulation symbol;

The quadrature separator is separated into mutually orthogonal two-way component with each postrotational modulation symbol;

Interlaced device is at each modulation symbol piece Nn _TIn, at least one road in the two ways of separated component is interweaved, generate the two-way component after interweaving;

Quadrature merges device, as the corresponding intrument of above-mentioned quadrature separator, the two-way component after interweaving is merged, and generates one road symbols streams to be mapped.

18. a multi-aerial transmission system comprises:

Serial/parallel converting means carries out serial/parallel conversion to data to be sent, obtains M channel parallel data stream, and M is a natural number;

M adaptive modulation and coding device at each circuit-switched data stream, carried out adaptive modulation and coding respectively concurrently, generates stream of modulation symbols;

M chunk device at each circuit-switched data stream, carries out the chunk operation to described stream of modulation symbols respectively concurrently;

M pretreatment unit respectively at each circuit-switched data stream, carries out concurrently that constellation rotation, quadrature are separated, interweaved, the quadrature union operation;

Select mapping device,, choose M road stream of modulation symbols successively according to time sequencing, each with the n in one tunnel stream of modulation symbols _TIndividual symbol is mapped to n one by one _TOn the individual transmitting antenna, send at synchronization, circulation is carried out this selection mapping and is sent;

Select to merge device, pass through n _RIndividual reception antenna, n _RMore than or equal to n _T, the whole spacing waves that engrave when receiving a plurality of interval, to received, have the signal that room and time distributes and merge, recover the modulation symbol piece;

Channel estimating and equivalent channel construction device carry out channel estimating, construct and the corresponding equivalent channel matrix of above-mentioned modulation symbol piece; And

The space-time joint checkout gear according to equivalent channel matrix, carries out space-time joint to the modulation symbolic blocks and detects, and recovers original transmission data.

19. multi-aerial transmission system according to claim 18 is characterized in that in described M the chunk device each is according to order input time, according to the number n of transmitting antenna _T, with Nn _TIndividual symbol lengths is a block length, and stream of modulation symbols is carried out piecemeal, in each modulation symbol piece, comprises that N length is n _TThe sub-piece of individual symbol, n _TBe natural number, N is the natural number more than or equal to 2.

20. multi-aerial transmission system according to claim 19 is characterized in that in the described M pretreatment unit each comprises:

The constellation rotation device rotates predetermined constellation rotation angle θ with each modulation symbol;

The quadrature separator is separated into mutually orthogonal two-way component with each postrotational modulation symbol;

Interlaced device is at each modulation symbol piece Nn _TIn, at least one road in the two ways of separated component is interweaved, generate the two-way component after interweaving;

Quadrature merges device, as the corresponding intrument of above-mentioned quadrature separator, the two-way component after interweaving is merged, and generates one road symbols streams to be mapped.

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