CN101414898A - Receive coalition method, system and equipment - Google Patents

Abstract

The invention relates to the technical field of mobile communication, in particular to a receiving and combining technology. The embodiment of the invention provides a receiving and combining method, a system and a device thereof, which improve the system performance effectively. The receiving and combining method based on data retransmission comprises the following steps: the data symbols which carry out at least twice emitting to one group of data are received and buffered; after interference cancellation and symbol combination are carried out to the data symbols, the data symbols are demodulated and decoded, thus obtaining the combined receiving data. The receiving and combining system based on data retransmission comprises an emitting device and a receiving device. The embodiment of the invention provides an emitting device and a receiving device, and the embodiment of the invention also provides a receiving and combining method based on transmit diversity and a system thereof.

Description

Receive merging method, system and equipment

Technical field

The present invention relates to the mobile communication technology field, relate in particular to the reception folding.

Background technology

3-G (Generation Three mobile communication system) (the 3rd Generation Mobile Communication, 3G) and following (the 4th Generation Mobile Communication of the 4th third-generation mobile communication system, 4G), in high speed data transfers, requirement to reliability also significantly improves, and especially also requires to satisfy higher reliability under abominable natural environment.Under this background, mix automatic repeat requests (HybridAutomatic Repeat Request, HARQ) technology has become one of key technology that improves reliability, the HARQ technology is based on automatic repeat requests (Automatic Repeat Request, ARQ) technology and forward error correction (Forward Error Correction, FEC) technology, if receiving terminal detects (Cyclic Redundancy Check by cyclic redundancy, CRC) the verification data that go out to receive make a mistake, then ask these data are retransmitted, and then improve the reliability that these data are correctly received.

The HARQ technology is carried out data re-transmission based on the feedback of receiving terminal, and it has reached the effect of time diversity technique in essence.Diversity technique also is to improve a kind of effective means of systematic function, and diversity technique is the emissions respectively at least two transmit diversities of transmitting terminal of one group of data, receiving terminal at least two transmit diversities on respectively the data symbol of emission receive merging.At present existing multiple transmit diversity mode comprises: time diversity is meant in different same data symbol or its suitable combinations of moment emission; Cell diversity is meant in different same data symbol or its suitable combinations of sub-district emission; Polarization diversity is meant same data symbol or its suitable combination of emission on the different polarised directions of the same antenna; Frequency diversity is meant in different band transmit same data symbol or its suitable combination; Space diversity is meant same data symbol or its suitable combination of emission on different antennas; Code diversity is meant and adopts different same data symbol or its suitable combinations of spreading code modulate emission; Relaying (Relay) diversity, be meant different relay base station (Relay Station, RS) between or RS and base station (Base Station, BS) between the different data symbol of emission or its suitable combination etc.

As shown in Figure 1, in the prior art based on the reception combination system block diagram of HARQ technology, at transmitting terminal, the one group of data that is added into the CRC check sign indicating number at the MAC layer are admitted to physical layer and transmit; Through constellation mapping, be modulated to the constellation point modulation symbol through the information bit behind the FEC coding,, generally adopt high order modulation in order to improve the availability of frequency spectrum of system; The constellation point modulation symbol is called data symbol when emission, a plurality of data symbols are sent in the channel through transmitter unit with the form of packet.At receiving terminal, receiving element receives the channel data packets for transmission, to carrying out demodulation after the data symbol process interference eliminated wherein, and with log-likelihood information (the Log Likelihood Ratio that demodulates, LLR) carry out buffer memory, LLR is also referred to as soft bit information, at last this soft bit information is carried out fec decoder.To the correctness that decoded data are carried out this reception of CRC check, correct if receiving terminal goes out Data Receiving by CRC check, then remove the soft bit information of buffer memory, and inform that by feedback transmitting terminal transmits next group data; If receiving terminal goes out the Data Receiving mistake by CRC check, inform that by feedback transmitting terminal retransmits these group data.

To the twice emitting at least of one group of data, receiving terminal carries out CRC check to receiving data after need receiving merging again.Reception merging method of the prior art is, data symbol in the packet that retransmits is carried out demodulation through after the interference eliminated, soft bit information after the demodulation is carried out buffer memory, and merge with soft bit information after this group data demodulates of buffer memory before, the method that merges mainly contains two kinds: follow the tracks of (ChaseCombine, CC) (Maximum Ratio Combine MRC) merges, and soft bit information further carries out fec decoder after merging for merging and MRC.To the correctness that decoded data are carried out this reception of CRC check, correct if receiving terminal goes out Data Receiving by CRC check, then remove the soft bit information of buffer memory, inform that by feedback transmitting terminal transmits next group data; If receiving terminal goes out the Data Receiving mistake by CRC check, inform that by feedback transmitting terminal retransmits these group data.Data Receiving is correct or reached maximum retransmission until going out by CRC check, the end of transmission that these group data are carried out.

The planisphere of high order modulation can be needed to be multiplied by corresponding coefficient for each low order planisphere in the process of combination by appropriate the constituting of planisphere process of low-order-modulated usually, at this each coefficient is referred to as modulation factor.When one group of data is transmitted, because transmitting terminal adopts high order modulation, high-order constellation point modulation symbol is constituted with different modulation factors by a plurality of low order constellation point modulation symbols, the different modulating factor has caused the difference of receiving terminal decoding reliability, thereby makes the error correcting code performance be difficult to reach optimum.Therefore, proposed the method for constellation reorganization in the prior art, the method for constellation reorganization is the constellation mapping rule of information bit when changing each data re-transmission, thereby makes the soft bit information after receiving terminal merges obtain average decoding reliability.Constellation recombination method to available technology adopting is introduced for example, for example at moment t ₁The emission information bit is b ₀b ₁b ₂b ₃, wherein, b ₀b ₁Be mapped on the low order constellation point modulation symbol x b ₂b ₃Be mapped on the low order constellation point modulation symbol y, high-order constellation point modulation symbol is constituted with different modulation factor α, β by low order constellation point modulation symbol x, y, the constellation mapping mode that adopts during combination is z=α x+ β y, and promptly Fa She data symbol is z=α x+ β y.Owing to adopted the constellation recombinant technique, to information bit b ₀b ₁b ₂b ₃When row retransmits, can be among z=α x+ β y, z=α x-β y, z=-α x+ β y, z=-α x-β y, z=β x+ α y, z=β x-α y, z=-β x+ α y, the z=-β x-α y any one through the data symbol of emission after the constellation mapping modulation.

As seen in the prior art, carry out data re-transmission based on the HARQ technology, the method of one group of The data constellation reorganization is carried out at least after the twice emitting receiving when merging at receiving terminal, the soft bit information that the data symbol that receives is demodulated merges, merging based on bit-level makes the systematic function lifting more limited, and it is little that the method for constellation reorganization promotes effect to the systematic function that adopts bit-level to receive merging, still has the leeway of further raising.Simultaneously similar to reception merging method based on data re-transmission based on the reception merging method of transmit diversity, also have same technical problem.

Summary of the invention

The embodiment of the invention provides a kind of reception merging method, system and equipment, in order to the elevator system performance.

The embodiment of the invention provides a kind of reception merging method based on data re-transmission, comprising:

Receiving also, buffer memory carries out the data symbol of twice emitting at least to one group of data;

After described data symbol process interference eliminated and symbol merging, carry out the reception data after the demodulation sign indicating number obtains to merge.

The embodiment of the invention provides a kind of reception combination system of data re-transmission simultaneously, comprising:

Transmitter: be used for the data symbol after twice emitting is modulated respectively one group of data at least;

Receiving equipment: be used to receive the also described data symbol of buffer memory transmitter emission, after described data symbol process interference eliminated and symbol merging, carry out the reception data after the demodulation sign indicating number obtains merging.

The embodiment of the invention provides a kind of transmitter, comprising:

Coding unit: be used for that one group of data is carried out encoding operation and obtain information bit;

Modulating unit: be used for the described information bit of coding unit output is modulated to data symbol, when one group of data is carried out at least twice emitting, same information bit in these group data carried out the modulation factor difference of modulation allocation respectively;

Transmitter unit: the described data symbol that is used to launch modulating unit output.

The embodiment of the invention provides a kind of receiving equipment, comprising:

Receiving element: be used to receive data symbol;

Buffer unit: be used for the described data symbol that receiving element receives is carried out buffer memory;

Interference cancellation unit: be used for that described data symbol with the buffer unit buffer memory carries out interference eliminated and symbol merges, obtain interference eliminated and merge after data symbol;

Demodulating unit: be used for that the described data symbol that interference cancellation unit is exported is carried out demodulation and obtain information;

Decoding unit: be used for to decode reception data after obtaining to merge of the described information of demodulating unit output.

The embodiment of the invention also provides a kind of reception merging method based on transmit diversity, comprising:

Receive and be buffered in the data symbol of on two transmit diversity branch one group of data being modulated the back emission at least respectively;

After described data symbol process interference eliminated and symbol merging, carry out the reception data after the demodulation sign indicating number obtains to merge.

The embodiment of the invention also provides a kind of reception combination system based on transmit diversity, comprising:

Transmitter: be used to be transmitted on two transmit diversity branch the data symbol that obtains after one group of data modulated respectively at least;

Receiving equipment: be used to receive the also described data symbol of buffer memory transmitter emission, described data symbol through after the interference eliminated, is carried out the reception data after the demodulation sign indicating number obtains to merge.

Reception merging method, system and equipment that the embodiment of the invention provides based on data re-transmission, by buffer memory one group of data is carried out the received data symbol of twice emitting at least, and carry out the demodulation sign indicating number after the data in buffer symbol merged by interference eliminated and symbol, the reception that logarithm has showed symbol level factually merges, improved systematic function effectively, reduce frame error rate and bit error rate, improved the channel capacity and the availability of frequency spectrum of system.

The reception based on transmit diversity that the embodiment of the invention provides merges method and system, carry out buffer memory by the data symbol at least two transmit diversity branch that will receive, and by carrying out the demodulation sign indicating number after interference eliminated and the symbol merging, the reception that logarithm has showed symbol level factually merges, improved systematic function effectively, reduce frame error rate and bit error rate, improved the channel capacity and the availability of frequency spectrum of system.

Description of drawings

Fig. 1 is based on the reception combination system block diagram of HARQ technology in the prior art;

Fig. 2 is based on the reception combination system block diagram of data re-transmission in the embodiment of the invention;

Fig. 3 is that the reception based on data re-transmission merges method flow diagram in the embodiment of the invention;

Fig. 4 is the schematic diagram of two QPSK data symbol stack composition 16QAM data symbols in the embodiment of the invention;

Fig. 5 is two emission double reception system transmissions schematic diagrames in the embodiment of the invention;

Fig. 6 is constellation mapping mode integrated mode figure during two antenna transmit in the embodiment of the invention;

Fig. 7 is that the reception merging method based on data re-transmission promotes the contrast schematic diagram to systematic function in the embodiment of the invention and the prior art;

Fig. 8 is that the reception based on transmit diversity merges method flow diagram in the embodiment of the invention.

Embodiment

The reception merging method that in present mobile communication system, adopts based on data re-transmission, twice emitting at least for one group of data, at receiving terminal the data symbol through Channel Transmission is carried out interference eliminated respectively separately, demodulation afterwards, and the soft bit information after the demodulation merged by CC or MRC decodes after merging and obtains receiving data.This method makes the lifting of systematic function lower, the inventor thinks if at receiving terminal the data symbol through the twice emitting at least of Channel Transmission is come integrated treatment by interference cancellation techniques, can realize the merging of symbol level, and the reception data of the data symbol after will merging after carrying out obtaining merging behind the demodulation sign indicating number, will improve systematic function greatly.Further, the embodiment of the invention is also proposing on the basis based on existing constellation recombination method: when transmitting terminal carries out at least twice emitting to one group of data, modulation factor difference to same information bit distribution in these group data, thereby after making receiving terminal receive the data symbol of twice emitting at least and merging, realize the whole balanced of each information bit decoding reliability, this is called optimizes constellation reorganization strategy.

Based on above analysis, the embodiment of the invention provides a kind of reception combination system based on data re-transmission, and as shown in Figure 2, this system comprises transmitter 201 and receiving equipment 202, wherein:

Transmitter 201: be used for the data symbol after twice emitting is modulated respectively one group of data at least;

Receiving equipment 202: be used to receive and the data symbol of buffer memory transmitter 201 emission, data symbol is carried out carrying out the reception data after the demodulation sign indicating number obtains to merge after interference eliminated and symbol merge.

According to optimizing constellation reorganization strategy, when transmitter carries out at least twice emitting to one group of data, same information bit in these group data is carried out the modulation factor difference of modulation allocation respectively.

Receiving equipment 202 also is used for carrying out verification to receiving data, if check out Data Receiving correct, then removes the data in buffer symbol, and next group data of indication emission; If verification goes out the Data Receiving mistake, then this group data are launched in indication again;

Transmitter 201 is launched next group data after the indication of next group data of the emission that receives receiving equipment 202 feedbacks; After the indication of launching these group data again that receives receiving equipment 202 feedbacks, launch this group data again.

A kind of transmitter 201 that the embodiment of the invention provides comprises:

Coding unit 2011: be used for that one group of data is carried out encoding operation and obtain information bit;

Modulating unit 2012: be used for the information bit of coding unit 2011 outputs is modulated to data symbol, further according to optimizing constellation reorganization strategy, when one group of data is carried out at least twice emitting, same information bit in these group data is carried out the modulation factor difference of modulation allocation respectively;

Transmitter unit 2013: the data symbol that is used to launch modulating unit 2012 outputs.

A kind of receiving equipment 202 that the embodiment of the invention provides comprises:

Receiving element 2021: be used to receive data symbol;

Buffer unit 2022: the data symbol that is used for receiving element 2021 is received carries out buffer memory;

Interference cancellation unit 2023: be used for that buffer unit 2022 data in buffer symbols are carried out interference eliminated and merge with symbol, obtain interference eliminated and merge after data symbol;

Demodulating unit 2024: be used for that the data symbol that interference cancellation unit 2023 is exported is carried out demodulation and obtain information, be generally log-likelihood information;

Decoding unit 2025: be used for to decode reception data after obtaining to merge of the information of demodulating unit 2024 output.

Receiving element 2021, buffer unit 2022, interference cancellation unit 2023, demodulating unit 2024 and decoding unit 2025 have been realized the reception merging of receiving terminal to data, and receiving equipment 202 also comprises:

Verification unit 2026: be used for the reception data of decoding unit 2025 outputs are carried out verification, correct if verification goes out Data Receiving, then remove the data in buffer symbol, and next group data of indication emission; If verification goes out the Data Receiving mistake, then this group data are launched in indication again.

Each unit can be positioned at a physical entity in transmitter that the embodiment of the invention provides and the receiving equipment, also can be positioned on the different physical entities.

The embodiment of the invention provides a kind of reception merging method based on data re-transmission simultaneously, as shown in Figure 3, comprises step:

S301, reception and buffer memory carry out the data symbol of twice emitting at least to one group of data;

S302, data symbol merged through interference eliminated and symbol after, carry out the reception data after the demodulation sign indicating number obtains to merge.

If based on optimizing constellation reorganization strategy, when then one group of data being carried out at least twice emitting, the modulation factor difference that same information bit in these group data is distributed.

S303, carry out verification, if check out Data Receiving correct, then remove the data in buffer symbol, and the indication transmitting terminal is launched next group data receiving data; If verification goes out the Data Receiving mistake, then indicate transmitting terminal to launch this group data again.

Reception combination system and method based on data re-transmission that the embodiment of the invention provides can will receive the merging that data realize symbol level, if transmitting terminal adopts and optimizes constellation reorganization strategy simultaneously, the decoding reliability of each information bit that then can balanced receiving terminal correspondence, thus systematic function improved greatly.

The reception merging method and system based on data re-transmission that the embodiment of the invention is provided are elaborated below, concrete application scenarios is based on the single output of single input (the Single Input SingleOutput of HARQ technology, SISO) system, can certainly be based on the ARQ technology, the difference of two kinds of technology is that the HARQ technology is the physical layer retransmission technology, the ARQ technology is the above high-rise retransmission technique of physical layer, and adopting the HARQ technology still is the enforcement did not influence of ARQ technology to this programme.

In the embodiment of the invention, be that example is elaborated, at one group The data high order modulation technology, for example M-PSK, M-QAM, the log of transmitting terminal to emission with SISO system based on the HARQ technology ₂(M)〉2 etc., at receiving terminal by the correctness of CRC check to this group Data Receiving.If receiving terminal goes out the Data Receiving mistake by CRC check, inform that by feedback transmitting terminal retransmits this group data, has promptly produced data re-transmission.To one group of data of at least once launching, before receiving terminal carries out CRC check, need receive merging, the reception Merge Scenarios of embodiment of the invention symbolization level promptly increases interference cancellation receiver and comes detection signal between the receiving element of receiving terminal and demodulating unit.Interference cancellation receiver commonly used comprises ZF (Zero-Forcing, ZF), least mean-square error (Linear Minimum Mean-Squared Error, L-MMSE), maximum likelihood (Maximum Likelihood, ML), serial interference elimination (SuccessiveInterference Cancellation, SIC), parallel interference is eliminated (Parallel Interference Cancellation, PIC) etc. several, also might be the combination of multiple interference cancellation techniques.Interference cancellation receiver connects a buffer unit, and buffer memory is at least once launched the data symbol that is received by receiving element after these group data in the buffer unit.The data in buffer symbol passes through interference cancellation receiver simultaneously in the buffer unit, can realize that receiving terminal carries out symbol level to these group data of at least once emission and merges, reception data after the data symbol that merges back output by interference cancellation receiver is sent into demodulating unit and decoding unit again and can be obtained merging will receive data at last and send into verification unit and carry out CRC check.

The embodiment of the invention provides a kind of reception merging method, may further comprise the steps:

A1, suppose at t ₁Constantly launch one group of data, the information bit after the FEC coding is b ₀b ₁b ₂b ₃, b ₀b ₁Be mapped on the QPSK constellation point modulation symbol x b ₂b ₃Be mapped on the QPSK constellation point modulation symbol y, the modulation factor of x, y is respectively α, β, information bit b ₀b ₁b ₂b ₃The constellation mapping mode that adopts when being modulated into to 16QAM constellation point modulation symbol is z=α x+ β y;

The data symbol that a2, receiving terminal receive the channel transmission row cache of going forward side by side supposes that this data symbol is r through the data symbol that receives at receiving terminal after Channel Transmission ₁, behind demodulation, fec decoder, decoded reception data are carried out CRC check, if receive correctly, show the transmission success of these group data is finished, then remove data in buffer symbol r ₁, and notify transmitting terminal to transmit next by feedback and organize data; If CRC check is found t ₁This Data Receiving mistake of transmission is then launched this group data again by HARQ request transmitting terminal constantly, proceeds a3;

A3, if at t ₂Constantly launch this group data, i.e. information bit b again ₀b ₁b ₂b ₃

When launching these group data once more, can carry out constellation reorganization mapping for these group data like that according to prior art, launch after the modulation;

Further, for the same information bit that guarantees same group of data twice or the modulation factor difference of repeatedly distributing in the emission, the embodiment of the invention has also proposed a kind of constellation reorganization scheme of optimization, and is specific as follows:

Suppose certain constantly, the information bit of data after the FEC coding that adds the CRC check sign indicating number at the MAC layer is b ₀b ₁b ₂b ₃, b ₀b ₁Be mapped on the QPSK constellation point modulation symbol x b ₂b ₃Be mapped on the QPSK constellation point modulation symbol y, certainly, also can adopt other group technology to shine upon to information bit, for example b ₀b ₂Be mapped on the constellation symbol x b ₁b ₃Be mapped on the constellation symbol y, enumerate no longer one by one, x, y are multiplied by corresponding modulation factor α, β, and stack becomes the emission of 16QAM constellation point modulation symbol, because two modulation factors are arranged, so can claim that order of modulation is 2, its process as shown in Figure 4.Wherein, 16QAM constellation point modulation symbol is formed in two QPSK constellation point modulation symbol stacks, one has 8 kinds of different constellation mapping modes, is respectively z=α x+ β y, z=α x-β y, z=-α x+ β y, z=-α x-β y, z=β x+ α y, z=β x-α y, z=-β x+ α y, z=-β x-α y.The embodiment of the invention has proposed a kind of optimization constellation reorganization strategy, when α and β are real number, if the constellation mapping mode that emission is for the first time adopted is z=α x+ β y, the constellation mapping mode that emission so for the second time can be adopted is z=β x+ α y, z=β x-α y, z=-β x+ α y, among the z=-β x-α y any one, can guarantee the modulation factor difference that the same information bit of same group of data distributes like this in twice emitting, be 2 can obtain first and optimize the constellation reorganization scheme according to optimizing constellation reorganization strategy and order of modulation thus: twice emitting adopts any one in following the combination, shown in formula [1], the order of two kinds of constellation mapping modes that provide in each combination that twice emitting adopts can exchange, more excellent, select combination 3 for use or make up 4.

Combination 1: $\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="z"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">z</figure-callout>}}_1=\mathrm{\&alpha;x}+\mathrm{\&beta;<figure-callout\; id="2"\; label="y\; z"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}& \\ z_{}{}_2=\mathrm{\&beta;x}+\mathrm{\&alpha;y}\end{array}\right.$ Combination 2: $\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="z"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">z</figure-callout>}}_1=\mathrm{\&alpha;x}+\mathrm{\&beta;<figure-callout\; id="2"\; label="y\; z"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}& \\ z_{}{}_2=-\mathrm{\&beta;x}-\mathrm{\&alpha;y}\end{array}\right.$ Combination 3: $\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="z"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">z</figure-callout>}}_1=\mathrm{\&alpha;x}+\mathrm{\&beta;<figure-callout\; id="2"\; label="y\; z"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}& \\ z_{}{}_2=-\mathrm{\&beta;x}+\mathrm{\&alpha;y}\end{array}\right.$ Combination 4: $\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="z"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">z</figure-callout>}}_1=\mathrm{\&alpha;x}+\mathrm{\&beta;<figure-callout\; id="2"\; label="y\; z"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}& \\ z_{}{}_2=\mathrm{\&beta;x}-\mathrm{\&alpha;y}\end{array}\right.---\left[1\right]$

First optimizes the constellation reorganization scheme is the real number proposition based on α and β, and it is to be determined by traditional constellation mapping mode that α and β are real number.In the 3GPP2 standard, when high order modulation (HierarchalModulation), traditional constellation mapping mode is adjusted, modulation factor α, β among the data symbol z=α x+ β y of emission this moment may be plural number, at α, β is the situation of plural number, according to optimizing constellation reorganization strategy, if the constellation mapping mode that emission is for the first time adopted is that the constellation mapping mode that z=α x+ β y, emission so for the second time can be adopted is z=β ^*X-α ^*Y, z=-β ^*X+ α ^*Y, z=β ^*X+ α ^*Y, z=-β ^*X-α ^*Among the y any one, wherein () ^*The expression conjugation.Proposed second thus and optimized the constellation reorganization scheme: any one below two time transmit diversities adopt in the combination, shown in formula [2], the order of two kinds of constellation mapping modes that provide in each combination that twice emitting adopts can exchange, and is more excellent, selects combination 3 for use or makes up 4.

Combination 1: $\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="z"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">z</figure-callout>}}_1=\mathrm{\&alpha;x}+\mathrm{\&beta;<figure-callout\; id="2"\; label="y\; z"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}& \\ z_{}{}_2=\mathrm{\&beta;}{x}^{*}+\mathrm{\&alpha;}{y}^{*}\end{array}\right.$ Combination 2: $\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="z"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">z</figure-callout>}}_1=\mathrm{\&alpha;x}+\mathrm{\&beta;<figure-callout\; id="2"\; label="y\; z"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}& \\ z_{}{}_2=-\mathrm{\&beta;}{x}^{*}-\mathrm{\&alpha;}{y}^{*}\end{array}\right.---\left[2\right]$

Combination 3: $\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="z"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">z</figure-callout>}}_1=\mathrm{\&alpha;x}+\mathrm{\&beta;<figure-callout\; id="2"\; label="y\; z"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}& \\ z_{}{}_2=-\mathrm{\&beta;}{x}^{*}+\mathrm{\&alpha;}{y}^{*}\end{array}\right.$ Combination 4: $\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="z"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">z</figure-callout>}}_1=\mathrm{\&alpha;x}+\mathrm{\&beta;<figure-callout\; id="2"\; label="y\; z"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}& \\ z_{}{}_2=\mathrm{\&beta;}{x}^{*}-\mathrm{\&alpha;}{y}^{*}\end{array}\right.$

At α, β is the situation of plural number, according to optimizing constellation reorganization strategy, if the constellation mapping mode that emission is for the first time adopted is that the constellation mapping mode that z=α x+ β y, emission so for the second time can be adopted is z=β x ^*-α y ^*, z=-β x ^*+ α y ^*, z=β x ^*+ α y ^*, z=-β x ^*-α y ^*In any one.Proposed the 3rd thus and optimized the constellation reorganization scheme: any one below two time transmit diversities adopt in the combination, shown in formula [3], the order of two kinds of constellation mapping modes that provide in each combination that twice emitting adopts can exchange, and is more excellent, selects combination 3 for use or makes up 4.

Combination 1: $\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="z"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">z</figure-callout>}}_1=\mathrm{\&alpha;x}+\mathrm{\&beta;<figure-callout\; id="2"\; label="y\; z"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}& \\ z_{}{}_2=\mathrm{\&beta;}{x}^{*}+\mathrm{\&alpha;}{y}^{*}\end{array}\right.$ Combination 2: $\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="z"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">z</figure-callout>}}_1=\mathrm{\&alpha;x}+\mathrm{\&beta;<figure-callout\; id="2"\; label="y\; z"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}& \\ z_{}{}_2=-\mathrm{\&beta;}{x}^{*}-\mathrm{\&alpha;}{y}^{*}\end{array}\right.---\left[3\right]$

Combination 3: $\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="z"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">z</figure-callout>}}_1=\mathrm{\&alpha;x}+\mathrm{\&beta;<figure-callout\; id="2"\; label="y\; z"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}& \\ z_{}{}_2=-\mathrm{\&beta;}{x}^{*}+\mathrm{\&alpha;}{y}^{*}\end{array}\right.$ Combination 4: $\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="z"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">z</figure-callout>}}_1=\mathrm{\&alpha;x}+\mathrm{\&beta;<figure-callout\; id="2"\; label="y\; z"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}& \\ z_{}{}_2=\mathrm{\&beta;}{x}^{*}-\mathrm{\&alpha;}{y}^{*}\end{array}\right.$

Can be that real number still is the optimization constellation reorganization scheme that imaginary number is selected a kind of correspondence of embodiment of the invention proposition according to α and β, suppose that α and β are real number, then optimize the constellation reorganization scheme according to first, after process constellation mapping mode is modulated, the data symbol that sends is z=β x+ α y, can certainly be z=β x-α y, z=-β x+ α y or z=-β x-α y;

A4, receiving terminal receive this data symbol that resends row cache of going forward side by side, and the data symbol that this group data channel transmission back of supposing to resend receives at receiving terminal is r ₂, receiving terminal is with r ₁And r ₂Simultaneously by the interference cancellation receiver detection signal, with the interference of eliminating correlated channels and carry out symbol and merge, disturb eliminating and the data symbol that carries out after symbol merges is further separated the mediation fec decoder;

A5, decoded reception data are carried out CRC check,, show the transmission success of these group data is finished, then remove data in buffer symbol r if receive correctly ₁And r ₂, and notify transmitting terminal to transmit next by feedback and organize data; If find t by CRC check ₂This group Data Receiving mistake of transmission constantly then resends this group data by HARQ request transmitting terminal;

And the like, go out the correct or maximum that reaches configuration of Data Receiving emitting times again until CRC check.

Can realize that to interference cancellation receiver the reception principle that symbol level merges is introduced below.Preferably, the interference cancellation receiver that the embodiment of the invention adopts is LMMSE receiver or ZF receiver, and adopting optimization constellation reorganization scheme with transmitting terminal is that example describes to the twice emitting of same group of data, and that concrete is above-mentioned t ₁And t ₂Constantly to information bit b ₀b ₁b ₂b ₃The twice emitting of carrying out.As α, when β is real number, first optimize that combination 1 is example in the constellation reorganization scheme according to what the embodiment of the invention provided, the data symbol of the channel transmission that receiving terminal receives after same group of data of twice emitting can be suc as formula shown in [4]:

$\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="r"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_1=h_1(\mathrm{\&alpha;x}+\mathrm{\&beta;y})+n_1\\ {\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_2=h_2(\mathrm{\&beta;x}+\mathrm{\&alpha;y})+n_2\end{array}\right.---\left[4\right]$

Wherein, in conjunction with existing noise theoretical model, suppose n ₁, n ₂For average is 0 Gaussian noise, and $E\left\{{\left|{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_1\right|}^2\right\}=E\left\{{\left|{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_2\right|}^2\right\}=\frac{{\mathrm{<figure-callout\; id="0"\; label="N"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">N</figure-callout>}}_0}{2},$ E{ ^*Expression ^*Mathematical expectation,

Represent noise power; h ₁, h ₂Channel response parameter when representing twice transmission data respectively; X, y are that amplitude is 1 QPSK data symbol, | x|=|y|=1, x, y modulation factor are respectively α, β, suppose $\mathrm{\&alpha;}=\frac{2\sqrt{2}}{\sqrt{10}},$ $\mathrm{\&beta;}=\frac{\sqrt{2}}{\sqrt{10}}.$

Can obtain formula [5] by formula [4]:

$\left[\begin{array}{c}{r}_1\\ {\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_2\end{array}\right]=\left[\begin{array}{cc}{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1& 0\\ 0& {\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2\end{array}\right]\left[\begin{array}{cc}\mathrm{\&alpha;}& \mathrm{\&beta;}\\ \mathrm{\&beta;}& \mathrm{\&alpha;}\end{array}\right]\left[\begin{array}{c}x\\ y\end{array}\right]+\left[\begin{array}{c}{n}_1\\ {\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_2\end{array}\right]=\left[\begin{array}{cc}{\mathrm{\&alpha;<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1& {\mathrm{\&beta;<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1\\ {\mathrm{\&beta;<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2& {\mathrm{\&alpha;h}}_2\end{array}\right]\left[\begin{array}{c}x\\ y\end{array}\right]\left[\begin{array}{c}{n}_1\\ {\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_2\end{array}\right]=H\left[\begin{array}{c}x\\ y\end{array}\right]\left[\begin{array}{c}{n}_1\\ n_2\end{array}\right]---\left[5\right]$

Wherein $H=\left[\begin{array}{cc}{\mathrm{\&alpha;<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1& {\mathrm{\&beta;<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1\\ {\mathrm{\&beta;<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2& {\mathrm{\&alpha;<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2\end{array}\right]$ Be virtual antenna transmission matrix, can obtaining parameter h by pilot signal ₁, h ₂Thereby, determine the concrete numerical value of this matrix, by can solving x and the y that adds the interchannel noise influence behind the interference cancellation receiver, thereby realized that the symbol level that receives data merges, and can further carry out the demodulation sign indicating number.

For example the x and the y of the adding noise effect that obtains by the ZF receiver can be expressed as formula [6]:

$\left[\begin{array}{c}\tilde{x}\\ \tilde{y}\end{array}\right]=H^{-1}*\left[\begin{array}{c}{r}_1\\ {\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_2\end{array}\right]=\left[\begin{array}{c}x\\ y\end{array}\right]+\frac{1}{{\mathrm{\&alpha;}}^2-{\mathrm{\&beta;}}^2}\left[\begin{array}{c}\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1}\mathrm{\&alpha;}{n}_1-\frac{1}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2}\mathrm{\&beta;}{n}_2\\ -\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1}\mathrm{\&beta;}{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_1+\frac{1}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2}\mathrm{\&alpha;}{n}_2\end{array}\right]---\left[6\right]$

For matrix H, also may there be the situation that does not have inverse matrix, so the H in the formula [6] ^-1By (H ^*H) ^-1H ^*Replace, wherein H ^*Be the associate matrix of matrix H, can obtain adding the x and the y of noise effect equally, the effect equivalence.

Similarly, x and the y that obtains adding noise effect by the L-MMSE receiver is expressed as formula [7]:

$\left[\begin{array}{c}\tilde{x}\\ \tilde{y}\end{array}\right]=W\&CenterDot;\left[\begin{array}{c}{r}_1\\ r_2\end{array}\right]---\left[7\right]$

Wherein, W=(H ^*H+ σ ²I) ^-1H ^*, wherein

σ ²The expression noise variance, P _sExpression sends signal power, σ ²The noise power of expression received signal, I is 2 * 2 unit matrix.

As α, when β is plural number, second optimize that combination 1 is example in the constellation reorganization scheme according to what the embodiment of the invention provided, the data symbol of the channel transmission that receiving terminal receives after same group of data of twice emitting can be supposed suc as formula shown in [8] $\mathrm{\&alpha;}=\frac{2\sqrt{2}}{\sqrt{10}}{e}^{j{\mathrm{\&theta;}}_1},$ $\mathrm{\&beta;}=\frac{\sqrt{2}}{\sqrt{10}}{e}^{j{\mathrm{\&theta;}}_2}:$

$\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="r"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_1=h_1(\mathrm{\&alpha;x}+\mathrm{\&beta;y})+n_1\\ {\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_2=h_2({\mathrm{\&beta;}}^{*}x+{\mathrm{\&alpha;}}^{*}y)+n_2\end{array}\right.---\left[8\right]$

Can obtain formula [9] by formula [8]:

$\left[\begin{array}{c}{r}_1\\ {\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_2\end{array}\right]=\left[\begin{array}{cc}{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1& 0\\ 0& {\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2\end{array}\right]\left[\begin{array}{cc}\mathrm{\&alpha;}& \mathrm{\&beta;}\\ {\mathrm{\&beta;}}^{*}& {\mathrm{\&alpha;}}^{*}\end{array}\right]\left[\begin{array}{c}x\\ y\end{array}\right]+\left[\begin{array}{c}{n}_1\\ {\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_2\end{array}\right]=\left[\begin{array}{cc}{\mathrm{\&alpha;<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1& {\mathrm{\&beta;<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1\\ {{\mathrm{\&beta;}}^{*}\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2& {{\mathrm{\&alpha;}}^{*}h}_2\end{array}\right]\left[\begin{array}{c}x\\ y\end{array}\right]\left[\begin{array}{c}{n}_1\\ {\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_2\end{array}\right]=H\left[\begin{array}{c}x\\ y\end{array}\right]\left[\begin{array}{c}{n}_1\\ n_2\end{array}\right]---\left[9\right]$

Wherein $H=\left[\begin{array}{cc}{\mathrm{\&alpha;<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1& {\mathrm{\&beta;<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1\\ {{\mathrm{\&beta;}}^{*}\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2& {{\mathrm{\&alpha;}}^{*}\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2\end{array}\right]$ Be virtual antenna transmission matrix, also can obtain parameter h by pilot signal ₁, h ₂Thereby, determine the concrete numerical value of this matrix, by solving x and the y that adds the interchannel noise influence behind the interference cancellation receiver.

For example the x and the y of the adding noise effect that obtains by the ZF receiver can be expressed as formula [10]:

$\left[\begin{array}{c}\tilde{x}\\ \tilde{y}\end{array}\right]=H^{-1}*\left[\begin{array}{c}{r}_1\\ {\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_2\end{array}\right]=\left[\begin{array}{c}x\\ y\end{array}\right]+\frac{1}{{{\left|\mathrm{\&alpha;}\right|}^2-\left|\mathrm{\&beta;}\right|}^2}\left[\begin{array}{c}\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1}{\mathrm{\&alpha;}}^{*}{n}_1-\frac{1}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2}\mathrm{\&beta;}{n}_2\\ -\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1}{\mathrm{\&beta;}}^{*}{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_1+\frac{1}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2}\mathrm{\&alpha;}{n}_2\end{array}\right]---\left[6\right]$

If matrix H does not have inverse matrix, same H ^-1Also can adopt (H ^*H) ^-1H ^*Form, the effect equivalence.

Similarly, make W=(H ^*H+ σ ²I) ^-1H ^*, wherein

σ ²The expression noise variance, P _sExpression sends signal power, and then the x and the y of the adding noise effect that obtains by the L-MMSE receiver can be expressed as formula [11]:

$\left[\begin{array}{c}\tilde{x}\\ \tilde{y}\end{array}\right]=W\&CenterDot;\left[\begin{array}{c}{r}_1\\ r_2\end{array}\right]---\left[11\right]$

As α, when β is plural number, the 3rd optimize that combination 1 is example in the constellation reorganization scheme according to what the embodiment of the invention provided, the data symbol of the channel transmission that receiving terminal receives after same group of data of twice emitting can be supposed suc as formula shown in [12] $\mathrm{\&alpha;}=\frac{2\sqrt{2}}{\sqrt{10}}{e}^{j{\mathrm{\&theta;}}_1},$ $\mathrm{\&beta;}=\frac{\sqrt{2}}{\sqrt{10}}{e}^{j{\mathrm{\&theta;}}_2}:$

$\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="r"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_1=h_1(\mathrm{\&alpha;x}+\mathrm{\&beta;y})+n_1\\ {\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_2=h_2(\mathrm{\&beta;}{x}^{*}+\mathrm{\&alpha;}{y}^{*})+n_2\end{array}\right.---\left[12\right]$

Can't directly find the solution this moment to x and y, need carry out identical distortion to formula [12] and obtain formula [13]:

$\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="r"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_1=h_1(\mathrm{\&alpha;x}+\mathrm{\&beta;y})+n_1\\ {\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_2^{*}={\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2^{*}({\mathrm{\&beta;}}^{*}x+{\mathrm{\&alpha;}}^{*}y)+{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_2^{*}\end{array}\right.---\left[13\right]$

Can obtain formula [14] by formula [13]:

$\left[\begin{array}{c}{r}_1\\ {{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_2}^{*}\end{array}\right]=\left[\begin{array}{cc}{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1& 0\\ 0& {{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2}^{*}\end{array}\right]\left[\begin{array}{cc}\mathrm{\&alpha;}& \mathrm{\&beta;}\\ {\mathrm{\&beta;}}^{*}& {\mathrm{\&alpha;}}^{*}\end{array}\right]\left[\begin{array}{c}x\\ y\end{array}\right]+\left[\begin{array}{c}{n}_1\\ {\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_2\end{array}\right]=\left[\begin{array}{cc}{\mathrm{\&alpha;<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1& {\mathrm{\&beta;<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1\\ {\mathrm{\&beta;}}^{*}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2}^{*}& {\mathrm{\&alpha;}}^{*}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2}^{*}\end{array}\right]\left[\begin{array}{c}x\\ y\end{array}\right]\left[\begin{array}{c}{n}_1\\ {{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_2}^{*}\end{array}\right]=H\left[\begin{array}{c}x\\ y\end{array}\right]\left[\begin{array}{c}{n}_1\\ {{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_2}^{*}\end{array}\right]---\left[14\right]$

Wherein $H=\left[\begin{array}{cc}{\mathrm{\&alpha;<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1& {\mathrm{\&beta;<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1\\ {\mathrm{\&beta;}}^{*}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2}^{*}& {\mathrm{\&alpha;}}^{*}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2}^{*}\end{array}\right]$ Be virtual antenna transmission matrix, also can obtain parameter h by pilot signal ₁, h ₂Thereby, determine the concrete numerical value of this matrix, by solving x and the y that adds the interchannel noise influence behind the interference cancellation receiver.

For example the x and the y of the adding noise effect that obtains by the ZF receiver can be expressed as formula [15]:

$\left[\begin{array}{c}\tilde{x}\\ \tilde{y}\end{array}\right]=H^{-1}*\left[\begin{array}{c}{r}_1\\ {{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_2}^{*}\end{array}\right]=\left[\begin{array}{c}x\\ y\end{array}\right]+\frac{1}{{{\left|\mathrm{\&alpha;}\right|}^2-\left|\mathrm{\&beta;}\right|}^2}\left[\begin{array}{c}\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1}{\mathrm{\&alpha;}}^{*}{n}_1-\frac{1}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2}\mathrm{\&beta;}{{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_2}^{*}\\ -\frac{1}{{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_1}{\mathrm{\&beta;}}^{*}{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_1+\frac{1}{{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_2}\mathrm{\&alpha;}{{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_2}^{*}\end{array}\right]---\left[15\right]$

If matrix H does not have inverse matrix, same H ^-1Also can adopt (H ^*H) ^-1H ^*Form, the effect equivalence.

Same, order

Wherein

σ ²The expression noise variance, P _sExpression sends signal power, and then the x and the y of the adding noise effect that obtains by the L-MMSE receiver can be expressed as formula [16]:

$\left[\begin{array}{c}\tilde{x}\\ \tilde{y}\end{array}\right]=W\&CenterDot;\left[\begin{array}{c}{r}_1\\ {{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_2}^{*}\end{array}\right]---\left[16\right]$

To the data symbol of twice emitting receive respectively and buffer memory after, can solve x and the y that adds the interchannel noise influence by interference cancellation receiver simultaneously, thereby the symbol level of having realized receiving terminal merges, and further carries out the demodulation sign indicating number and can obtain receiving data.

In the 3G/4G mobile communication system, for the enhanced system performance, introduced multiple-input and multiple-output (MultipleInput Multiple Output, MIMO) technology, the MIMO technology is a kind of space diversity reception to communicate, utilize a plurality of inputs and a plurality of output of a channel, greatly improved the availability of frequency spectrum of system and the coverage of base station.Be that example describes now with two emission double reception system, referring to shown in Figure 5, for transmitter unit and receiving element be double antenna emission, receive schematic diagram.In mimo system, to carve during the invention process example assumes, the data that add the CRC check sign indicating number at the MAC layer are respectively b at antenna #1 and antenna #2 desire emission information bit after the FEC coding ₀b ₁b ₂b ₃And b ₄b ₅b ₆b ₇, b wherein ₀b ₁And b ₄b ₅Be mapped to QPSK constellation point modulation symbol x respectively ₁And x ₂, b ₂b ₃And b ₆b ₇Be mapped to QPSK constellation point modulation symbol y respectively ₁And y ₂On; x ₁, y ₁Modulation factor be respectively α, β, stack becomes 16QAM constellation point modulation symbol at antenna #1 emission, x ₂, y ₂Modulation factor be respectively α, β, certainly, x ₂, y ₂Modulation factor also can be to reselect one group of modulation factor or the constellation reorganization strategy of a kind of optimization that proposes according to the embodiment of the invention is reselected one group of modulation factor according to constellation of the prior art reorganization strategy, stack becomes 16QAM constellation point modulation symbol in antenna #2 emission, can certainly x ₁, y ₁At antenna #2 emission, x ₂, y ₂Launch at antenna #1.One group of data of emission can be modulated according to constellation mapping mode separately respectively on antenna #1 and antenna #2, if the constellation mapping mode that antenna #1 and antenna #2 adopt respectively on the 1st time diversity is a pattern 1, according to optimizing constellation reorganization strategy, see also Fig. 6, pattern 2 to 19 is all patterns of the constellation mapping mode that antenna #1 and antenna #2 can adopt respectively on the 2nd time diversity, and pattern 2 to 10 is with x on the 2nd time diversity ₁, y ₁Still launch and x at antenna #1 ₂, y ₂Still provide in antenna #2 emission, pattern 11 to 19 is with x on the 2nd time diversity ₁, y ₁Launch and x at antenna #2 ₂, y ₂Provide in antenna #1 emission.Pattern 2 to 19 is based on α and β is real number, when the embodiment of the invention provides α and β and is real number first optimized the constellation reorganization scheme: the constellation mapping mode that antenna #1 and antenna #2 adopt respectively on the 1st time diversity is a pattern 1, the constellation mapping mode that antenna #1 and antenna #2 adopt respectively on the 2nd time diversity is any one in the pattern 2 to 19, and twice emitting adopts the order of two group modes to exchange.

When α and β are plural number, with identical in the SISO system, what propose second optimizes the constellation reorganization scheme and be: the constellation mapping mode that antenna #1 and antenna #2 adopt respectively on the 1st time diversity is the arbitrary patterns after antenna #1 and antenna #2 adopt respectively on 1, the 2 time diversity of pattern constellation mapping mode each α that is pattern 2 to the pattern 19 and β get conjugation; Similarly, the 3rd optimizes the constellation reorganization scheme is: the constellation mapping mode that antenna #1 and antenna #2 adopt respectively on the 1st time diversity is antenna #1 and antenna #2 adopt respectively on 1, the 2 time diversity of pattern constellation mapping mode each x that is pattern 2 to the pattern 19 ₁, y ₁, x ₂, y ₂Get the arbitrary patterns after the conjugation.More excellent, the constellation mapping mode that antenna #1 and antenna #2 adopt respectively on the 2nd time diversity can preference pattern 2 to 5 and pattern 11 to 14 in any one, these 8 kinds of patterns not only guarantee the modulation factor difference of same information bit on the different time diversity, the sign that also guarantees same information bit is variant, thereby makes that the decoding reliability of soft bit information is balanced more after the receiving terminal demodulation.

Based on the data re-transmission of optimizing constellation reorganization strategy, the embodiment of the invention provides a kind of reception merging method, may further comprise the steps:

B1, suppose at t ₁Constantly launch one group of data, antenna #1 and antenna #2 desire send information bit and are respectively b after the FEC coding ₀b ₁b ₂b ₃And b ₄b ₅b ₆b ₇, wherein, b ₀b ₁And b ₄b ₅Be mapped to QPSK constellation point modulation symbol x respectively ₁, x ₂, b ₂b ₃And b ₆b ₇Be mapped to QPSK constellation point modulation symbol y respectively ₁, y ₂On; x ₁, y ₁Modulation factor be respectively α, β, information bit b ₀b ₁b ₂b ₃The constellation mapping mode that adopts when being modulated into to 16QAM constellation point modulation symbol is z ₁=α x ₁+ β y ₁, x ₂, y ₂Modulation factor be α, β, can certainly be different, information bit b ₄b ₅b ₆b ₇The constellation mapping mode that adopts when being modulated into to 16QAM constellation point modulation symbol is z ₂=α x ₂+ β y ₂

The data symbol that b2, receiving terminal receive the channel transmission row cache of going forward side by side supposes that this data symbol is r through the data symbol that receives at receiving terminal after Channel Transmission ₁₁, r ₂₁, behind demodulation, fec decoder, decoded reception data are carried out CRC check, if receive correctly, show the transmission success of these group data is finished, then remove data in buffer symbol r ₁₁, r ₂₁, and notify transmitting terminal to transmit next by feedback and organize data; If CRC check is found t ₁This Data Receiving mistake of transmission is then launched this group data again by HARQ request transmitting terminal constantly, proceeds b3;

B3, if at t ₂Constantly launch this group data, i.e. information bit b again ₀b ₁b ₂b ₃And b ₄b ₅b ₆b ₇Can be that real number still is that imaginary number is selected corresponding optimization constellation reorganization scheme according to α and β, suppose that α and β are real number, then optimize the constellation reorganization scheme according to first, after process constellation mapping mode was modulated, the data symbol of transmission was any one in the pattern 2 to 19;

B4, receiving terminal receive this data symbol that resends row cache of going forward side by side, and the data symbol that this group data channel transmission back of supposing to resend receives at receiving terminal is r ₂₁, r ₂₂, receiving terminal is with r ₁₁, r ₂₁And r ₂₁, r ₂₂By the interference cancellation receiver detection signal, to eliminate the interference of correlated channels, elimination is further separated the mediation fec decoder after disturbing simultaneously;

B5, decoded reception data are carried out CRC check,, show the transmission success of these group data is finished, then remove data in buffer symbol r if receive correctly ₁₁, r ₂₁And r ₂₁, r ₂₂, and notify transmitting terminal to transmit next by feedback and organize data; If find t by CRC check ₂This group Data Receiving mistake of transmission constantly then resends this group data by HARQ request transmitting terminal;

The re-transmission of these group data is gone out the correct or maximum that reaches configuration of Data Receiving again till the emitting times until CRC check.

Can realize that to interference cancellation receiver in the mimo system reception principle that symbol level merges is introduced below.Preferably, the interference cancellation receiver of employing is LMMSE or ZF receiver.Can adopt following two kinds of processing schemes when receiving terminal adopts interference cancellation techniques in mimo system, below to realizing that principle is introduced respectively.At first introduce processing scheme one, at t ₁The packet of launching on two antennas constantly, if employing pattern 1, then the two paths of data symbol that receives of receiving terminal can be expressed as:

$\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="11"\; label="r"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">r</figure-callout>}}_{11}={\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^1({\mathrm{\&alpha;x}}_1+{\mathrm{\&beta;y}}_1)+h_{21}^1({\mathrm{\&alpha;x}}_2+{\mathrm{\&beta;y}}_2)+n_1\\ {\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}={\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^1({\mathrm{\&alpha;x}}_1+{\mathrm{\&beta;y}}_1)+h_{22}^1({\mathrm{\&alpha;x}}_2+{\mathrm{\&beta;y}}_2)+n_2\end{array}\right.---\left[17\right]$

In conjunction with existing noise theoretical model, suppose n ₁, n ₂For average is 0 Gaussian noise, and $E\left\{{\left|{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_1\right|}^2\right\}=E\left\{{\left|{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_2\right|}^2\right\}=\frac{{\mathrm{<figure-callout\; id="0"\; label="N"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">N</figure-callout>}}_0}{2},$ Wherein, E{ ^*Expression ^*Mathematical expectation,

Represent noise power;

Represent that the i transmit antennas is to the channel transfer function of j root reception antenna on n transmission diversity; X, y are that amplitude is 1 QPSK modulation symbol: | x|=|y|=1;

The modulation factor of x, y is α, β, α and β can also can be plural number for real number, when α and β adopt first to optimize the constellation reorganization scheme during for real number, when α and β can adopt second to optimize the constellation reorganization scheme during for plural number, below to adopting first to optimize the constellation reorganization scheme and the second reception principle of optimizing the constellation reorganization scheme is introduced in the lump.Because from the mathematics angle, real number is a kind of special shape of plural number just, for example $\mathrm{\&alpha;}=\frac{2\sqrt{2}}{\sqrt{10}}{e}^{j{\mathrm{\&theta;}}_1},$ $\mathrm{\&beta;}=\frac{\sqrt{2}}{\sqrt{10}}{e}^{j{\mathrm{\&theta;}}_2},$ Work as θ ₁And θ ₂Be k π, during k ∈ z, α, β are real number, and the conjugation of real number is this real number itself.This with $\mathrm{\&alpha;}=\frac{2\sqrt{2}}{\sqrt{10}}{e}^{j{\mathrm{\&theta;}}_1},$ $\mathrm{\&beta;}=\frac{\sqrt{2}}{\sqrt{10}}{e}^{j{\mathrm{\&theta;}}_2}$ For preceding two kinds of reception principles of optimizing the constellation reorganization scheme are adopted in the example introduction.

According to the reception principle in the SISO system, the two paths of data symbol of formula [17] can obtain shown in formula [18] through after the interference cancellation operation:

Wherein, f _N(n ₁, n ₂..) (N=1,2) representative is about n ₁And n ₂And the function of other relevant parameter, relevant parameter is x for example ₁, y ₁, x ₂, y ₂Deng.

At t ₂The packet of launching on the moment two antennas, if employing pattern 12, the data symbol that receiving terminal receives can be expressed as:

$\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}={\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^2({{\mathrm{\&beta;}}^{*}x}_2-{{\mathrm{\&alpha;}}^{*}y}_2)+h_{21}^2({{\mathrm{\&beta;}}^{*}x}_1-{\mathrm{\&alpha;}}^{*}{y}_1)+n_3\\ r_{22}={\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^2({{\mathrm{\&beta;}}^{*}x}_2-{{\mathrm{\&alpha;}}^{*}y}_2)+h_{22}^2({{\mathrm{\&beta;}}^{*}x}_1-{{\mathrm{\&alpha;}}^{*}y}_1)+n_4\end{array}\right.---\left[19\right]$

If α and β are real number, α=α so ^*, β=β ^*,, suppose n in conjunction with existing noise theoretical model ₃, n ₄For average is 0 Gaussian noise, and $E\left\{{\left|n_3\right|}^2\right\}=E\left\{{\left|{\mathrm{<figure-callout\; id="4"\; label="n"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_4\right|}^2\right\}=\frac{{\mathrm{<figure-callout\; id="0"\; label="N"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">N</figure-callout>}}_0}{2}.$

The data symbol of formula [19] obtains shown in formula [20] through after the interference cancellation operation:

Wherein, wherein, f _N(n ₃, n ₄..) (N=3,4) representative is about n ₃And n ₄And the function of other relevant parameter, relevant parameter is x for example ₁, y ₁, x ₂, y ₂Deng.

Can get following two formulas by formula [19] and [20]:

Formula [21] and [22] are carried out interference cancellation operation respectively can solve x ₁, y ₁, x ₂And y ₂

Introduce processing scheme two below, still to adopting the first reception principle of optimizing the constellation reorganization scheme and the second optimization constellation reorganization scheme to be introduced in the lump.At t ₁And t ₂Constantly the packet of launching on two antennas if launch employing pattern 1 for the first time, is launched employing pattern 12 for the second time, then the data symbol that receives of receiving terminal can be used as once transmission four circuit-switched data symbols shown in formula [23]:

$\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="11"\; label="r"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">r</figure-callout>}}_{11}={\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^1({\mathrm{\&alpha;x}}_1+{\mathrm{\&beta;y}}_1)+h_{21}^1({\mathrm{\&alpha;x}}_2+\mathrm{\&beta;}{y}_2)+n_1\\ r_{21}={\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^1({\mathrm{\&alpha;x}}_1+{\mathrm{\&beta;y}}_1)+h_{22}^1({\mathrm{\&alpha;x}}_2+{\mathrm{\&beta;y}}_2)+n_2\\ {\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}={\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^2({{\mathrm{\&beta;}}^{*}x}_2-{{\mathrm{\&alpha;}}^{*}y}_2)+h_{21}^2({{\mathrm{\&beta;}}^{*}x}_1-{\mathrm{\&alpha;}}^{*}{y}_1)+n_3\\ r_{22}={\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^2({{\mathrm{\&beta;}}^{*}x}_2-{{\mathrm{\&alpha;}}^{*}y}_2)+h_{22}^2({{\mathrm{\&beta;}}^{*}x}_1-{{\mathrm{\&alpha;}}^{*}y}_1)+{\mathrm{<figure-callout\; id="4"\; label="n"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_4\end{array}\right.\text{---}\left[23\right]$

Can obtain formula [24] by formula [23]:

$\left[\begin{array}{c}{r}_{11}\\ r_{21}\\ r_{12}\\ r_{22}\end{array}\right]=\left[\begin{array}{cccc}{\mathrm{\&alpha;<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^1& {\mathrm{\&beta;<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^1& \mathrm{\&alpha;}{h}_{21}^1& \mathrm{\&beta;}{h}_{21}^1\\ {\mathrm{\&alpha;<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^1& {\mathrm{\&beta;<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^1& \mathrm{\&alpha;}{h}_{22}^1& {\mathrm{\&beta;h}}_{22}^1\\ {\mathrm{\&beta;}}^{*}{\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^2& -{\mathrm{\&alpha;}}^{*}{\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^2& {\mathrm{\&beta;}}^{*}{h}_{21}^2& {-\mathrm{\&alpha;}}^{*}{h}_{21}^2\\ {\mathrm{\&beta;}}^{*}{\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^2& -{\mathrm{\&alpha;}}^{*}{\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^2& {\mathrm{\&beta;}}^{*}{h}_{22}^2& -{\mathrm{\&alpha;}}^{*}{h}_{22}^2\end{array}\right]\left[\begin{array}{c}{x}_1\\ y_1\\ x_2\\ {\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}}_2\end{array}\right]+\left[\begin{array}{c}{n}_1\\ n_2\\ n_3\\ n_4\end{array}\right]---\left[24\right]$

Formula [24] is added the x that interchannel noise influences by solving after the interference cancellation operation ₁, y ₁, x ₂, y ₂

When α, β are plural number, can also adopt the 3rd to optimize the constellation reorganization scheme, below it is received principle and be introduced.This scheme is that antenna #1 and antenna #2 adopt respectively on the 1st time diversity constellation mapping mode is antenna #1 and antenna #2 adopt respectively on 1, the 2 time diversity of pattern constellation mapping mode each x that is pattern 2 to the pattern 19 ₁, y ₁, x ₂, y ₂Getting the arbitrary patterns after the conjugation, is that example is introduced with employing pattern 12 still.

For processing scheme one, at t ₁The packet of launching on two antennas constantly, employing pattern 1, then the two paths of data symbol that receives of receiving terminal can be expressed as formula [17], for example $\mathrm{\&alpha;}=\frac{2\sqrt{2}}{\sqrt{10}}{e}^{j{\mathrm{\&theta;}}_1},$ $\mathrm{\&beta;}=\frac{\sqrt{2}}{\sqrt{10}}{e}^{j{\mathrm{\&theta;}}_2}:$

$\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="11"\; label="r"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">r</figure-callout>}}_{11}={\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^1({\mathrm{\&alpha;x}}_1+{\mathrm{\&beta;y}}_1)+h_{21}^1({\mathrm{\&alpha;x}}_2+{\mathrm{\&beta;y}}_2)+n_1\\ {\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}={\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^1({\mathrm{\&alpha;x}}_1+{\mathrm{\&beta;y}}_1)+h_{22}^1({\mathrm{\&alpha;x}}_2+{\mathrm{\&beta;y}}_2)+n_2\end{array}\right.---\left[17\right]$

The two paths of data symbol of formula [17] obtains shown in formula [18] through after the interference cancellation operation:

Wherein, f _N(n ₁, n ₂..) (N=1,2) representative is about n ₁And n ₂And the function of other relevant parameter, relevant parameter is x for example ₁, y ₁, x ₂, y ₂Deng.

For example at t ₂If the packet of launching on the moment two antennas is each x in the employing pattern 12 ₁, y ₁, x ₂, y ₂Get the pattern after the conjugation, the data symbol that receiving terminal receives can be expressed as formula [25]:

$\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}={\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^2(\mathrm{\&beta;}{x_2}^{*}-\mathrm{\&alpha;}{{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}}_2}^{*})+h_{21}^2(\mathrm{\&beta;}{x_1}^{*}-\mathrm{\&alpha;}{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}}_1}^{*})+n_3\\ r_{22}={\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^2(\mathrm{\&beta;}{x_2}^{*}-\mathrm{\&alpha;}{{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}}_2}^{*})+h_{22}^2(\mathrm{\&beta;}{x_1}^{*}-\mathrm{\&alpha;}{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}}_1}^{*})+n_4\end{array}\right.---\left[25\right]$

For realize by behind the interference eliminated machine to x ₁, y ₁, x ₂, y ₂Find the solution, can carry out identical distortion to formula [25] and obtain following formula [26]:

$\left\{\begin{array}{c}{{\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}}^{*}={{\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^2}^{*}({{\mathrm{\&beta;}}^{*}x}_2-{{\mathrm{\&alpha;}}^{*}y}_2)+{h_{21}^2}^{*}({{\mathrm{\&beta;}}^{*}x}_1-{\mathrm{\&alpha;}}^{*}{y}_1)+{n_3}^{*}\\ {r_{22}}^{*}={{\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^2}^{*}({{\mathrm{\&beta;}}^{*}x}_2-{{\mathrm{\&alpha;}}^{*}y}_2)+{h_{22}^2}^{*}({{\mathrm{\&beta;}}^{*}x}_1-{{\mathrm{\&alpha;}}^{*}y}_1)+{{\mathrm{<figure-callout\; id="4"\; label="n"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_4}^{*}\end{array}\right.---\left[26\right]$

The data symbol of formula [26] obtains shown in formula [27] through after the interference cancellation operation:

Wherein, $f_N(n_3^{*},{\mathrm{<figure-callout\; id="4"\; label="n"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_4^{*}..)(N=\mathrm{3,4})$ Representative about With

And the function of other relevant parameter, relevant parameter is x for example ₁, y ₁, x ₂, y ₂Deng.

Can get formula [28] and [29] by formula [18] and [27]:

Formula [28] and [29] are carried out the x that interference cancellation operation can solve the influence of adding interchannel noise respectively ₁, y ₁, x ₂, y ₂

Introduce processing scheme two below, as can be known at t ₁And t ₂The packet of launching on the moment two antennas, the data symbol that receiving terminal receives can be used as once four circuit-switched data symbols of transmission, shown in formula [30]:

$\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="11"\; label="r"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">r</figure-callout>}}_{11}={\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^1({\mathrm{\&alpha;x}}_1+{\mathrm{\&beta;y}}_1)+h_{21}^1({\mathrm{\&alpha;x}}_2+\mathrm{\&beta;}{y}_2)+n_1\\ r_{21}={\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^1({\mathrm{\&alpha;x}}_1+{\mathrm{\&beta;y}}_1)+h_{22}^1({\mathrm{\&alpha;x}}_2+{\mathrm{\&beta;y}}_2)+n_2\\ {\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}={\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^2(\mathrm{\&beta;}{x_2}^{*}-\mathrm{\&alpha;}{{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}}_2}^{*})+h_{21}^2(\mathrm{\&beta;}{x_1}^{*}-\mathrm{\&alpha;}{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}}_1}^{*})+n_3\\ r_{22}={\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^2(\mathrm{\&beta;}{x_2}^{*}-\mathrm{\&alpha;}{{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}}_2}^{*})+h_{22}^2(\mathrm{\&beta;}{x_1}^{*}-\mathrm{\&alpha;}{{\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}}_1}^{*})+{\mathrm{<figure-callout\; id="4"\; label="n"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_4\end{array}\right.1\text{---}\left[30\right]$

For realize by behind the interference eliminated machine to x ₁, y ₁, x ₂, y ₂Find the solution, can carry out identical distortion to formula [30] and obtain formula [31]:

$\left\{\begin{array}{c}{\mathrm{<figure-callout\; id="11"\; label="r"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">r</figure-callout>}}_{11}={\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^1({\mathrm{\&alpha;x}}_1+{\mathrm{\&beta;y}}_1)+h_{21}^1({\mathrm{\&alpha;x}}_2+\mathrm{\&beta;}{y}_2)+n_1\\ r_{21}={\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^1({\mathrm{\&alpha;x}}_1+{\mathrm{\&beta;y}}_1)+h_{22}^1({\mathrm{\&alpha;x}}_2+{\mathrm{\&beta;y}}_2)+n_2\\ {{\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}}^{*}={\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^{2*}({{\mathrm{\&beta;}}^{*}x}_2-{{\mathrm{\&alpha;}}^{*}y}_2)+h_{21}^{2*}({{\mathrm{\&beta;}}^{*}x}_1-{\mathrm{\&alpha;}}^{*}{y}_1)+{n_3}^{*}\\ {r_{22}}^{*}={\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^{2*}({{\mathrm{\&beta;}}^{*}x}_2-{{\mathrm{\&alpha;}}^{*}y}_2)+h_{22}^{2*}({{\mathrm{\&beta;}}^{*}x}_1-{{\mathrm{\&alpha;}}^{*}y}_1)+{{\mathrm{<figure-callout\; id="4"\; label="n"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_4}^{*}\end{array}\right.\text{---}\left[31\right]$

Can obtain formula [32] by formula [31]:

$\left[\begin{array}{c}{r}_{11}\\ r_{21}\\ {{\mathrm{<figure-callout\; id="12"\; label="r"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">r</figure-callout>}}_{12}}^{*}\\ {r_{22}}^{*}\end{array}\right]=\left[\begin{array}{cccc}{\mathrm{\&alpha;<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^1& {\mathrm{\&beta;<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^1& \mathrm{\&alpha;}{h}_{21}^1& \mathrm{\&beta;}{h}_{21}^1\\ {\mathrm{\&alpha;<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^1& {\mathrm{\&beta;<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^1& \mathrm{\&alpha;}{h}_{22}^1& {\mathrm{\&beta;h}}_{22}^1\\ {\mathrm{\&beta;}}^{*}{\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^{2*}& -{\mathrm{\&alpha;}}^{*}{\mathrm{<figure-callout\; id="11"\; label="h"\; filenames="A200710163265E00322.png"\; state="\{\{state\}\}">h</figure-callout>}}_{11}^{2*}& {\mathrm{\&beta;}}^{*}{h}_{21}^{2*}& {-\mathrm{\&alpha;}}^{*}{h}_{21}^{2*}\\ {\mathrm{\&beta;}}^{*}{\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^{2*}& -{\mathrm{\&alpha;}}^{*}{\mathrm{<figure-callout\; id="12"\; label="h"\; filenames="A200710163265E00331.png,A200710163265E00341.png"\; state="\{\{state\}\}">h</figure-callout>}}_{12}^{2*}& {\mathrm{\&beta;}}^{*}{h}_{22}^{2*}& -{\mathrm{\&alpha;}}^{*}{h}_{22}^{2*}\end{array}\right]\left[\begin{array}{c}{x}_1\\ y_1\\ x_2\\ {\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="A200710163265E00332.png,A200710163265E00341.png"\; state="\{\{state\}\}">y</figure-callout>}}_2\end{array}\right]+\left[\begin{array}{c}{n}_1\\ n_2\\ {n_3}^{*}\\ {{\mathrm{<figure-callout\; id="4"\; label="n"\; filenames="A200710163265E00341.png"\; state="\{\{state\}\}">n</figure-callout>}}_4}^{*}\end{array}\right]---\left[32\right]$

Formula [32] is added the x that interchannel noise influences by solving after the interference cancellation operation ₁, y ₁, x ₂, y ₂

To the data symbol of twice emitting receive respectively and buffer memory after, can solve the x that adds the interchannel noise influence by interference cancellation receiver simultaneously ₁, y ₁, x ₂, y ₂Thereby, realized that the symbol level of receiving terminal merges, further carry out the demodulation sign indicating number and can obtain receiving data.

Above-mentioned three kinds of all optimization constellation reorganization schemes all are based on the realization of 16QAM, also be that order of modulation is 2 specific implementation, the optimization constellation reorganization strategy that the embodiment of the invention provides also is applicable to other modulation system such as 8PSK, 8APSK, 64QAM, 128QAM etc.With order of modulation is that 3 64QAM is an example, six information bit b ₀b ₁b ₂b ₃b ₄b ₅Be mapped on the constellation point s of 64QAM, can resolve into following form: s=α x+ β y+ γ z, α wherein, beta, gamma is a modulation factor, can be that real number also can be a plural number, x, y, z are respectively the QPSK constellation point modulation symbol of 2 information bits mappings.So, according to optimizing can be optimized a kind of compound mode in the constellation reorganization scheme of constellation reorganization strategy and order of modulation, if be s at the data symbol of launching for the 1st time ₁=α x+ β y+ γ z, the data symbol the 2nd emission can be s so ₂=β ⁽²⁾x ⁽²⁾+ γ ⁽²⁾y ⁽²⁾+ α ⁽²⁾z ⁽²⁾, can be s at the data symbol of the 3rd emission ₃=γ ⁽³⁾x ⁽³⁾+ α ⁽³⁾y ⁽³⁾+ β ⁽³⁾z ⁽³⁾Much meet the compound mode of optimizing constellation reorganization strategy in addition, enumerate no longer one by one.The reception merging method that adopts the embodiment of the invention to provide to the data symbol of at least once emission merges and obtains receiving data, can improve systematic function.

See also Fig. 7, the contrast schematic diagram that reception merging method and the reception merging method of the prior art based on data re-transmission that provides for the embodiment of the invention promotes systematic function, obtain by computer simulation emulation, reduce frame error rate and bit error rate as can be seen, improved the channel capacity and the availability of frequency spectrum of system.

The reception merging method that the embodiment of the invention provides based on data re-transmission, at least one secondary data that is applied to adopt the HARQ technology to carry out constantly in difference is launched, also can need receive merging to data at receiving terminal equally to one group of data based on transmit diversity techniques in the enterprising line data emission of at least two transmit diversity branches such as the different moment, different sub-districts, different antennas, different polarised directions, different frequency ranges, different spreading codes, different relay base station.The embodiment of the invention provides a kind of reception based on transmit diversity to merge method and system, shows that as figure institute 8 the reception merging method based on transmit diversity that the embodiment of the invention provides comprises:

S801, receive and be buffered on two transmit diversity branch the data symbol of one group of data being modulated the back emission respectively at least;

More excellent, when at least two transmit diversity branch, one group of data being modulated respectively, the modulation factor difference that same information bit in these group data is distributed;

After data symbol on S802, at least two transmit diversity branch of general carries out interference eliminated and symbol merging, carry out the reception data after the demodulation sign indicating number obtains to merge.

The embodiment of the invention also provides a kind of reception combination system based on transmit diversity, comprising:

Transmitter: be used to be transmitted on two transmit diversity branch the data symbol that obtains after one group of data modulated respectively at least;

Receiving equipment: be used to receive the also data symbol of buffer memory transmitter emission, after data symbol process interference eliminated and symbol merging, carry out the reception data after the demodulation sign indicating number obtains merging.

More excellent, when transmitter is modulated respectively one group of data at least two transmit diversity branch, the modulation factor difference that same information bit in these group data is distributed.

The reception based on transmit diversity that the embodiment of the invention provides merges method and system and has improved systematic function effectively, has reduced frame error rate and bit error rate, has improved the channel capacity and the availability of frequency spectrum of system.

The reception merging method based on data re-transmission and other transmit diversity that the embodiment of the invention provides can be used in system simultaneously, and a concrete application scenarios is based on the mimo system of HARQ technology.Suppose that mimo system is two double reception systems that launch, and is b at antenna #1 and antenna #2 desire emission information bit ₀b ₁b ₂b ₃, comprise step:

C1, t ₁The time be engraved in two spatial emission diversity branch roads, promptly launch this group data b respectively on antenna #1 and the antenna #2 ₀b ₁b ₂b ₃

More excellent, when on two spatial emission diversity branch roads, these group data being modulated respectively, the modulation factor difference that same information bit in these group data is distributed;

The data symbol of launching on c2, receiving terminal reception and two spatial emission diversity branch roads of buffer memory, and by carrying out the reception data after the demodulation sign indicating number obtains to merge after interference eliminated and the symbol merging;

C3, carry out CRC check,, show these group data are sent to complete successfully, then remove the data in buffer symbol if it is correct to go out Data Receiving by CRC check to receiving data, and the indication emission next organize data; If go out the Data Receiving mistake by CRC check, then this group data are launched in indication again, continue to carry out c4;

C4, t ₂The time be engraved in two spatial emission diversity branch roads, promptly launch this group data b again on antenna #1 and the antenna #2 ₀b ₁b ₂b ₃

More excellent, when on two spatial emission diversity branch roads, these group data being modulated respectively, the modulation factor difference that same information bit in these group data is distributed;

C5, receiving terminal receive and two spatial emission diversity branch roads of buffer memory on the data symbol of emission again, and reception data to after the data symbol of emission merges by interference eliminated and symbol simultaneously respectively on two spatial emission diversity branch roads, carrying out after the demodulation sign indicating number obtains to merge for twice;

C6, carry out CRC check,, show the transmission success of these group data is finished, then remove the data in buffer symbol if receive correctly to receiving data, and the indication emission next organize data; If go out the Data Receiving mistake by CRC check, then this group data are launched in indication again;

The rest may be inferred, goes out the correct or maximum that reaches configuration of Data Receiving emitting times again until verification.

And more excellent, for one group of data b ₀b ₁b ₂b ₃Carry out t ₁And t ₂During twice emitting, to the modulation factor difference of same information bit distribution in these group data.

Usually, be the high order modulation of M for order of modulation, suppose α ₁..., α _MBeing modulation factor, can be real number or plural number, x ₁..., x _MIt is the low order constellation point modulation symbol that is mapped to by information bit; Suppose z ₁, z ₂..., z _KThe data symbol of launching respectively for different emitting times, perhaps on different transmit diversity branch respectively the emission data symbol, the transmit diversity here comprises different moment/different frequency range/different antenna/different polarised direction/different sub-district/different relay base station/different spreading codes modulation and above-mentioned combinations, for example in the different moment, different antennas is first-class;

Can corresponding formulation optimize the constellation reorganization scheme according to optimizing constellation reorganization strategy and order of modulation, for example launch for the 1st time or the 1st transmit diversity on data symbol be expressed as z ₁=α ₁x ₁+ α ₂x ₂+ ... α _Mx _M, then the 2nd time to the K time emission or the 2nd to K the transmit diversity to α ₁..., α _MAnd x ₁..., x _MThe data symbol that conversion forms through appropriate combination is expressed as z ₂..., z _K, meeting and optimize constellation reorganization strategy, the combined transformation here comprises and adding, subtracts, multiplication and division, conjugation etc.;

To the data symbol z on above-mentioned K emission or K the transmit diversity ₁, z ₂..., z _KCan regard the multichannel data symbol that sends on the virtual antenna arrays as, the data merging method on each diversity branch adopts interference cancellation techniques such as ZF, L-MMSE, ML, SIC, PIC to carry out input;

Wherein K and M can equate, also can not wait, and can use in turn according to certain mode in the constellation mapping mode that different transmit diversities adopt.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (22)

1, a kind of reception merging method based on data re-transmission is characterized in that, comprising:

Receiving also, buffer memory carries out the data symbol of twice emitting at least to one group of data;

After described data symbol process interference eliminated and symbol merging, carry out the reception data after the demodulation sign indicating number obtains to merge.

2, the method for claim 1 is characterized in that, when one group of data is carried out at least twice emitting, same information bit in these group data is carried out the modulation factor difference of modulation allocation respectively.

3, the method for claim 1 is characterized in that, also comprises:

Described reception data are carried out verification,, then remove the described data symbol of buffer memory if check out Data Receiving correct, and next group data of indication emission; If verification goes out the Data Receiving mistake, then this group data are launched in indication again, go out Data Receiving correctly or the maximum that reaches configuration emitting times again until verification.

4, method as claimed in claim 2 is characterized in that, described same information bit in these group data is modulated respectively, comprising:

The modulation factor that distributes when same information bit is modulated respectively in the twice emitting at least of determining one group of data is carried out according to order of modulation;

According to the modulation factor of determining same information bit in described one group of data is being modulated respectively in the twice emitting at least.

5, a kind of reception combination system based on data re-transmission is characterized in that, comprising:

Transmitter: be used for the data symbol after twice emitting is modulated respectively one group of data at least;

Receiving equipment: be used to receive the also described data symbol of buffer memory transmitter emission, after described data symbol process interference eliminated and symbol merging, carry out the reception data after the demodulation sign indicating number obtains merging.

6, system as claimed in claim 5 is characterized in that, when described transmitter carries out at least twice emitting to one group of data, same information in these group data is carried out the modulation factor difference that modulation bit is distributed respectively.

7, system as claimed in claim 6 is characterized in that, described receiving equipment also is used for described reception data are carried out verification, if check out Data Receiving correct, then removes the described data symbol of buffer memory, and next group data of indication emission; If verification goes out the Data Receiving mistake, then this group data are launched in indication again.

8, system as claimed in claim 7 is characterized in that, described transmitter also after the indication that receives next group data of emission, is launched next group data; After receiving the indication of launching these group data again, launch this group data again.

9, a kind of receiving equipment is characterized in that, comprising:

Receiving element: be used to receive data symbol;

Buffer unit: be used for the described data symbol that receiving element receives is carried out buffer memory;

Interference cancellation unit: be used for that described data symbol with the buffer unit buffer memory carries out interference eliminated and symbol merges, obtain interference eliminated and merge after data symbol;

Demodulating unit: be used for that the described data symbol that interference cancellation unit is exported is carried out demodulation and obtain information;

Decoding unit: be used for to decode reception data after obtaining to merge of the described information of demodulating unit output.

10, receiving equipment as claimed in claim 9 is characterized in that, also comprises:

Verification unit: be used for the described reception data of decoding unit output are carried out verification, correct if verification goes out Data Receiving, then remove data in buffer symbol in the buffer unit, and next group data of indication emission; If verification goes out the Data Receiving mistake, then this group data are launched in indication again.

11, a kind of transmitter is characterized in that, comprising:

Coding unit: be used for that one group of data is carried out encoding operation and obtain information bit;

Modulating unit: be used for the described information bit of coding unit output is modulated to data symbol, when one group of data is carried out at least twice emitting, same information bit in these group data carried out the modulation factor difference of modulation allocation respectively;

Transmitter unit: the described data symbol that is used to launch modulating unit output.

12, transmitter as claimed in claim 11, it is characterized in that, described modulating unit also obtains data symbol after the described information bit of at least two transmit diversity branch coding unit being exported is modulated respectively, when at least two transmit diversity branch, one group of data being modulated respectively, the modulation factor difference that same information bit in these group data is distributed.

13, a kind of reception merging method based on transmit diversity is characterized in that, comprising:

Receive and be buffered in the data symbol of on two transmit diversity branch one group of data being modulated the back emission at least respectively;

After described data symbol process interference eliminated and symbol merging, carry out the reception data after the demodulation sign indicating number obtains to merge.

14, method as claimed in claim 13 is characterized in that, and is described when at least two transmit diversity branch one group of data being modulated respectively, the modulation factor difference that same information bit in these group data is distributed.

15, method as claimed in claim 14 is characterized in that, describedly at least two transmit diversity branch one group of data is modulated respectively, comprising:

Determine at least two transmit diversity branch the modulation factor that distributes when same information bit is modulated respectively in one group of data according to order of modulation;

According to the modulation factor of determining described one group of data are modulated respectively on transmit diversity branch.

16, method as claimed in claim 13 is characterized in that, also comprises:

Described reception data are carried out verification,, then remove the described data symbol of buffer memory if check out Data Receiving correct, and next group data of indication emission; If verification goes out the Data Receiving mistake, then this group data are launched in indication again, go out Data Receiving correctly or the maximum that reaches configuration emitting times again until verification.

17, method as claimed in claim 15 is characterized in that, when one group of data is carried out at least twice emitting, same information bit in these group data is carried out the modulation factor difference of modulation allocation respectively.

18, a kind of reception combination system based on transmit diversity is characterized in that, comprising:

Transmitter: be used to be transmitted on two transmit diversity branch the data symbol that obtains after one group of data modulated respectively at least;

Receiving equipment: be used to receive the also described data symbol of buffer memory transmitter emission, with the reception data of carrying out after the described data symbol process interference eliminated after the demodulation sign indicating number obtains to merge.

19, system as claimed in claim 18 is characterized in that, when described transmitter is modulated respectively one group of data at least two transmit diversity branch, and the modulation factor difference that same information bit in these group data is distributed.

20, system as claimed in claim 19 is characterized in that, described receiving equipment also carries out verification to described reception data, if check out Data Receiving correct, then removes the described data symbol of buffer memory, and next group data of indication emission; If verification goes out the Data Receiving mistake, then this group data are launched in indication again.

21, system as claimed in claim 20 is characterized in that, after described transmitter receives the indication of next group data of emission, and next group data of emission on described at least two transmit diversity branch;

After described transmitter receives the indication of launching these group data again, on described two transmit diversity branch, launch this group data at least again.

22, system as claimed in claim 21 is characterized in that, when described transmitter carries out at least twice emitting to one group of data, same information bit in these group data is carried out the modulation factor difference of modulation allocation respectively.

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