CN105610480A

CN105610480A - Method and device for data transmission

Info

Publication number: CN105610480A
Application number: CN201410667706.3A
Authority: CN
Inventors: 李卫敏; 袁志锋
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2014-11-20
Filing date: 2014-11-20
Publication date: 2016-05-25
Anticipated expiration: 2034-11-20
Also published as: CN105610480B; WO2016078303A1

Abstract

The invention discloses a method and a device for data transmission. In the method, a data bit group is mapped into a complex sequence through a codebook, each k data bits which are outputted currently are set to be a data bit group, the length of the complex sequence is L, all elements in the complex sequence are all complex numbers, values of the real part and the imaginary part of each element are selected from an M-ple real number set; k is an integer no less than 1, L is an integer larger than 1, and M is an integer no less than 2; and the complex sequence is sent. According to the technical scheme provided by the invention, interference among multiple users can be effectively controlled, and the multi-user access communication performance can be effectively improved.

Description

Data transmission method and device

Technical field

The present invention relates to the communications field, in particular to a kind of data transmission method and device.

Background technology

Uplink multi-users access communications in correlation technique can be realized by different multiple access techniques, exampleAs: time division multiple acess access (TimeDivisionMultipleAccess, referred to as TDMA), frequency division multiple accessAccess (FrequencyDivisionMultipleAccess, referred to as FDMA), CDMA access (CodeDivisionMultipleAccess, referred to as CDMA) and space division multiple access meet (SpaceDivisionMultipleAccess, referred to as SDMA); Wherein, CDMA access (CDMA) technology be realize up multiplexA very important classification of family access communications, it can provide good access performance, by multiple wirelessCommunication standard is adopted.

For the access procedure that adopts CDMA, first, multiple accessing terminal adopts respectively the expansion of certain lengthExhibition sequence (for example: the sequence spreading that the length being made up of L numerical chracter or L digital element is L)Data to be sent (for example: quadrature amplitude modulation (QuadratureAmplitude are modulated mutually through widthModulation, referred to as QAM)) after data symbol carry out extension process; Wherein, extension process refers toEach symbol of the data symbol after each modulation and sequence spreading multiply each other form with the sequence spreading that adopts longSpend the process of identical symbol sebolic addressing; Particularly, in said process, the data symbol (example after each modulationAs: data to be sent corresponding constellation point symbol after QAM modulation) with the length sequence spreading that is LEach symbol multiply each other make data symbol after each modulation be expanded for adopted sequence spreading length phaseSame symbol sebolic addressing, the data symbol after each modulation can be expanded as L symbol, and this is equivalent to eachThe sequence spreading carrying that data symbol after modulation is L by this length respectively; Then, multiple accessing terminalThe symbol sebolic addressing that obtains of process extension process can on identical running time-frequency resource, send; Finally, base station receivesThe signal being superimposed after radio transmission to multiple spread signals that access terminal, passes through multi-user receptionDetection technique is isolated the useful information of each terminal from the superposed signal receiving.

CDMA belongs to the category of spread spectrum communication, is L because the data symbol after terminal modulation adopts lengthSequence spreading carries out can being expanded as L symbol after extension process, if require L symbol after extension processNumber transmission time equal the transmission time of data symbol before expansion, transmitting extended L after treatment soThe required bandwidth of symbol need to be expanded L doubly, so sequence spreading is often called as frequency expansion sequence.

Access terminal and can (for example: orthogonal frequency pass through multi-transceiver technology at the symbol that carries out obtaining after extension processDivide multiplexing (OrthogonalFrequencyDivisionMultiplexing, referred to as OFDM) bank of filtersMulticarrier (Filter-BankMulti-Carrier, referred to as FBMC)) to transmit, CDMA access is with manyThe combination of ZAP is multi-carrier code division multiple access technology (Multi-CarrierCodeDivisionMultipleAccess, referred to as MC-CDMA).

In CDMA technology, the expansion treatment process of emitter is fairly simple: by the data after each modulationSymbol and length are each symbol of the sequence spreading of L L after treatment symbol that is expanded that multiplies each other, thenLaunch by single-carrier technology or multi-transceiver technology; The receiving course of base station receiver is relatively multipleAssorted. How base station receiver isolates the useful data information of each terminal accurately from superposed signal, with thisEnsureing the multiple access access performance of cdma system, is the key of cdma system, and this relates to two aspects,Be sequence spreading and receiver, wherein, choosing of sequence spreading is performance basis, and the design of receiver is performanceEnsure.

Particularly, in order to obtain good multiple access access performance, between the sequence spreading that different terminals adopts, needThere is good cross correlation. If adopt single carrier code division multiplexing technology, the sequence spreading that terminal adopts alsoNeed to there is good autocorrelation performance, resist the impact of multidiameter delay expansion; And multicarrier code division multiplexing skillArt can rely on multi-transceiver technology to resist the impact of multidiameter delay expansion, the design of its sequence spreading canResit an exam and consider the cross correlation that is conducive to receiver separation multi-user information.

In the design basis of sequence spreading, base station can adopt high performance multi-user reception detection technique to divideFrom multi-user information, obtain good multiple access access performance, for example: serial interference elimination (SuccessiveInterferenceCancellation, referred to as SIC) receive detection technique, but its complexity is also relativelyHigh.

Choosing and designing of sequence spreading is the importance of CDMA technology. Direct sequence spread spectrum codes is divided multiple accessAccess (DirectSequence-CodeDivisionMultipleAccess, referred to as DS-CDMA) technologyBe a kind of conventional CDMA technology, the uplink multi-users that has been used as multiple wireless communication standards and system connectsEnter technology, what its sequence spreading adopted is that simple binary pseudorandom (Pseudo-Noise, referred to as PN) is realNumber Sequence. And the DS-CDMA based on binary PN sequence of real numbers is also applied to MC-CDMA skillArt. Binary pseudorandom sequence of real numbers also can be called binary pseudo-random sequence, the getting of its each element or symbolValue is typically expressed as 0 or 1, also can further be expressed as bipolar sequence, and 0 is expressed as+1,1 expressionFor-1, or, 0 be expressed as-1,1 be expressed as+1.

The design of sequence spreading also needs to consider the length of sequence spreading, and sequence spreading is longer, and different terminals adoptsSequence spreading between low cross correlation more easily ensure, and, more easily select more have low mutuallyThe sequence of correlation, thus can support more terminal to access simultaneously. If the terminal quantity of access is large simultaneouslyIn the length of sequence spreading, think that system is in overload.

Supporting a large number of users while connecting system to communicate is an important need of future wireless system, and this canTo consider the multiple access communication system that possesses better overload capacity based on CDMA access by designRealize.

From multiuser information theory angle, the nonopiate access mode of up employing can be obtained more than orthogonalThe power system capacity that location access way is larger or edge handling capacity, therefore, for system is flexibly provided,Hold more user and access simultaneously, difference accesses terminal and can adopt non-orthogonal sequence spreading. Because difference connectsThe sequence spreading that enters terminal is not mutually orthogonal, and each reception accessing terminal detects performance can be along with access simultaneouslyThe increase of terminal quantity and variation, it is more serious that the interference in the time of system overload between multi-user can become.

Based on binary pseudorandom sequence of real numbers for what realize simple, current CDMA access technology employingSequence spreading, still, binary pseudorandom sequence of real numbers is the shorter binary pseudorandom sequence of real numbers of length especiallyBetween low cross correlation and be not easy to ensure, when a large number of users is when simultaneously connecting system communicates, or beWhen system overload, serious multiuser interference be can produce, performance and multi-user detected thereby affect multi-user receptionAccess communications performance.

Summary of the invention

The embodiment of the present invention provides a kind of data transmission method and device, at least to solve the code in correlation techniqueDivide the multiple access technique sequence spreading based on binary pseudorandom sequence of real numbers conventionally, can produce serious multi-userBetween disturb, affect the problem of multi-user reception detection performance and multiple access communication performance.

According to an aspect of the present invention, provide a kind of data transmission method.

Comprise according to the data transmission method of the embodiment of the present invention: by code book, data-bit-group is mapped as to plural numberSequence, wherein, every k data bit of current output is set to data-bit-group, the length of sequence of complex numbersFor L, the whole elements in sequence of complex numbers are plural number and the real part of each element and the value of imaginary part and all come fromM unit real number set, k is more than or equal to 1 integer, and L is greater than 1 integer, and M is for being more than or equal to2 integer; Sequence of complex numbers is sent.

Preferably, every k data bit of the current output of channel encoder of emitter is set to data bitGroup.

Preferably, code book comprises that N length is more than or equal to the sequence of complex numbers of L, wherein, N for being greater than orEqual 1 integer, the whole elements in each sequence of complex numbers are plural number and the real part of each element and imaginary partValue all comes from M unit real number set.

Preferably, code book comprises 2^kIndividual length is more than or equal to the sequence of complex numbers of L, wherein, and each plural orderWhole elements in row are plural number and the real part of each element and the value of imaginary part and all come from M unit set of real numbersClose.

Preferably, M unit real number set comprises one of following: the M in [(M-1)/2, (M-1)/2] scope wholeThe set that array becomes, wherein, M is odd number; [-(M-1), (the M-1)] set of M odd number composition in scope,Wherein, M is even number; [-(M-1)/2, (M-1)/2] M integer in scope is multiplied by respectively corresponding normalizationThe set of the M that coefficient obtains a real number composition, wherein, M is odd number; [-(M-1), (the M-1)] M in scopeIndividual odd number is multiplied by respectively the set of M the real number composition that corresponding normalization coefficient obtains, and wherein, M be idolNumber.

Preferably, by code book, data-bit-group being mapped as to sequence of complex numbers comprises: according to preset rules from code bookIn obtain the sequence of complex numbers that the length corresponding with every k data bit is L, wherein, preset rules comprise withUnder one of at least: the represented index information of value of every k data bit, the different values of k data bitFrom the correspondence relationship information of the different sequence of complex numbers in code book, a plural number in every k data bit and code bookThe correspondence relationship information of sequence, the residing order information of every k data bit or positional information, every k dataThe residing order of bit or position rem and obtain after computing with respect to the quantity of sequence of complex numbers in code bookOrder information or positional information, the subset information of code book or sub-sequence information; By every k data bit mapping beLength is the sequence of complex numbers of L.

Preferably, by code book, data-bit-group being mapped as to sequence of complex numbers comprises: according to preset rules from every kIn code book corresponding to individual data bit, obtain the sequence of complex numbers that the length corresponding with every k data bit is L,Wherein, the code book corresponding to different values of k data bit; Preset rules comprise following one of at least:The correspondence relationship information of a sequence of complex numbers in every k data bit code book corresponding with it, every k dataThe residing order information of bit or positional information, the residing order of every k data bit or position are right with respect to itThe rem order information or the positional information that obtain after computing of the quantity of sequence of complex numbers in the code book of answering, kSubset information or the sub-sequence information of each code book corresponding to the different values of data bit, every k data bitSubset information or the sub-sequence information of corresponding code book; Be that length is answering of L by every k data bit mappingNumber Sequence.

Preferably, by code book, data-bit-group being mapped as to sequence of complex numbers comprises: according to preset rules from every kIn code book corresponding to individual data bit, obtain the sequence of complex numbers that the length corresponding with every k data bit is L,Wherein, the corresponding code book of every k data bit, preset rules comprise following one of at least: every k dataThe represented index information of value of bit, the different values of k data bit are corresponding with every k data bitThe correspondence relationship information of the different sequence of complex numbers in code book, one in every k data bit code book corresponding with itThe correspondence relationship information of individual sequence of complex numbers, the residing order information of every k data bit or positional information, every kComplementation is carried out with respect to the quantity of sequence of complex numbers in its corresponding code book in the residing order of individual data bit or positionOrder information or positional information that number obtains after computings, the subset information of the code book that every k data bit is corresponding orSub-sequence information; Be that length is the sequence of complex numbers of L by every k data bit mapping.

Preferably, sequence of complex numbers is sent and comprised: sequence of complex numbers is carried out to carrier modulation, generate transmitting letterNumber; Launch transmitting.

According to a further aspect in the invention, provide another kind of data transmission method.

Comprise according to the data transmission method of the embodiment of the present invention: receive the signal of K emitter transmitting, itsIn, K is more than or equal to 1 integer, and the signal of each emitter transmitting is that this emitter is to its data bitThe sequence of complex numbers that group by codebook mapping is carries out carrier modulation formation, and each emitter is every by current outputK data bit is set to data-bit-group, and the length of sequence of complex numbers is L, the whole elements in sequence of complex numbersBe plural number and the real part of each element and the value of imaginary part and all come from the first real number set of M, k for being greater than orEqual 1 integer, L is greater than 1 integer, and M is more than or equal to 2 integer; According to code book from receiveTo signal in obtain the data that K emitter sends.

Preferably, adopt the interference cancellation signals detector of receiver to receive to the received signal detection,Obtain the data that K emitter sends.

Preferably, the signal of K emitter transmitting is K emitter difference shape on identical running time-frequency resourceWhat become transmits.

Preferably, K the applied code book of emitter is different.

According to another aspect of the invention, provide a kind of data transmission device.

Comprise according to the data transmission device of the embodiment of the present invention: mapping block, for by code book by data ratioSpecial group is mapped as sequence of complex numbers, and wherein, every k data bit of current output is set to data-bit-group,The length of sequence of complex numbers is L, and the whole elements in sequence of complex numbers are real part and the imaginary part of plural number and each elementValue all come from M unit real number set, k is more than or equal to 1 integer, L is greater than 1 integer,M is more than or equal to 2 integer; Sending module, for sending sequence of complex numbers.

Preferably, mapping block comprises: the first acquiring unit, for according to preset rules from code book obtain withThe sequence of complex numbers that the length that every k data bit is corresponding is L, wherein, preset rules comprise following at least itOne: the represented index information of value of every k data bit, in the different values and code book of k data bitThe correspondence relationship information of different sequence of complex numbers, a sequence of complex numbers in every k data bit and code book rightAnswer relation information, the residing order information of every k data bit or positional information, every k data bit is of living inOrder or position with respect to the quantity of sequence of complex numbers in the code book order information obtaining after computing that remsOr positional information, the subset information of code book or sub-sequence information; The first map unit, for by every k dataBit mapping is that length is the sequence of complex numbers of L.

Preferably, mapping block comprises: second acquisition unit, for according to preset rules from every k data ratioIn special corresponding code book, obtain the sequence of complex numbers that the length corresponding with every k data bit is L, wherein, kThe code book corresponding to different values of data bit; Preset rules comprise following one of at least: every k dataThe correspondence relationship information of a sequence of complex numbers in the bit code book corresponding with it, every k data bit is residingOrder information or positional information, the residing order of every k data bit or position are with respect in its corresponding code bookThe quantity of sequence of complex numbers the rem order information or the positional information that obtain after computing, k data bitSubset information or the sub-sequence information of each code book corresponding to different values, the code book that every k data bit is correspondingSubset information or sub-sequence information; The second map unit, for being that length is by every k data bit mappingThe sequence of complex numbers of L.

Preferably, mapping block comprises: the 3rd acquiring unit, for according to preset rules from every k data ratioIn special corresponding code book, obtain the sequence of complex numbers that the length corresponding with every k data bit is L, wherein, every kThe corresponding code book of individual data bit, preset rules comprise following one of at least: the value institute of every k data bitThe index information representing, in the different values of k the data bit code book corresponding with every k data bit notWith the correspondence relationship information of sequence of complex numbers, a sequence of complex numbers in every k data bit code book corresponding with itCorrespondence relationship information, the residing order information of every k data bit or positional information, every k data bitResiding order or position rem after computing with respect to the quantity of sequence of complex numbers in its corresponding code bookThe order information arriving or positional information, the subset information of the code book that every k data bit is corresponding or sub-sequence information;The 3rd map unit, for being that length is the sequence of complex numbers of L by every k data bit mapping.

Preferably, sending module comprises: generation unit, for sequence of complex numbers is carried out to carrier modulation, generates and send outPenetrate signal; Transmitting element, for launching transmitting.

In accordance with a further aspect of the present invention, provide another kind of data transmission device.

Comprise according to the data transmission device of the embodiment of the present invention: receiver module, for receiving K emitterThe signal of transmitting, wherein, K is more than or equal to 1 integer, and the signal of each emitter transmitting is this transmittingThe sequence of complex numbers that machine to its data-bit-group by codebook mapping is carries out carrier modulation formation, each emitterEvery k data bit of current output is set to data-bit-group, and the length of sequence of complex numbers is L, plural orderWhole elements in row are plural number and the real part of each element and the value of imaginary part and all come from M unit set of real numbersClose, k is more than or equal to 1 integer, and L is greater than 1 integer, and M is more than or equal to 2 integer;Acquisition module, for obtaining from the signal receiving the data that K emitter sends according to code book.

Preferably, K the applied code book of emitter is different.

By the embodiment of the present invention, adopt, by code book, data-bit-group is mapped as to sequence of complex numbers, wherein, willEvery k data bit of current output is set to data-bit-group, and the length of sequence of complex numbers is L, sequence of complex numbersIn whole elements be plural number and the real part of each element and the value of imaginary part all come from the first real number set of M,K is more than or equal to 1 integer, and L is greater than 1 integer, and M is more than or equal to 2 integer; To multipleNumber Sequence sends, and has solved the CDMA access technology in correlation technique conventionally real based on binary pseudorandomThe sequence spreading of Number Sequence, can produce serious multiuser interference, affects multi-user reception and detects performance and manyThe problem of user's access communications performance, and then can effectively control multiuser interference and effectively improve manyUser's access communications performance.

Brief description of the drawings

Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part,Schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 is according to the flow chart of the data transmission method of the embodiment of the present invention;

Fig. 2 is according to the flow chart of the another kind of data transmission method of the embodiment of the present invention;

Fig. 3 according to the emitter of the preferred embodiment of the present invention one by every k data bit by codebook mapping isLength is the schematic diagram of the sequence of complex numbers of L;

Fig. 4 passes through code book according to the another kind of emitter of the preferred embodiment of the present invention one by every k data bitBe mapped as the schematic diagram that length is the sequence of complex numbers of L;

Fig. 5 passes through code book according to another emitter of the preferred embodiment of the present invention one by every k data bitBe mapped as the schematic diagram that length is the sequence of complex numbers of L;

Fig. 6 according to the emitter of the preferred embodiment of the present invention two by every k data bit by codebook mapping isLength is the schematic diagram of the sequence of complex numbers of L;

Fig. 7 passes through code book according to the another kind of emitter of the preferred embodiment of the present invention two by every k data bitBe mapped as the schematic diagram that length is the sequence of complex numbers of L;

Fig. 8 according to the emitter of the preferred embodiment of the present invention three by every k data bit by codebook mapping isLength is the schematic diagram of the sequence of complex numbers of L;

Fig. 9 passes through code book according to the another kind of emitter of the preferred embodiment of the present invention three by every k data bitBe mapped as the schematic diagram that length is the sequence of complex numbers of L;

Figure 10 carries out respectively transfer of data and reception according to the K of the preferred embodiment of the present invention four emitterMachine carries out serial interference elimination SIC and receives the schematic diagram detecting;

Figure 11 is according to the structured flowchart of the data transmission device of the embodiment of the present invention;

Figure 12 is the structured flowchart of data transmission device according to the preferred embodiment of the invention;

Figure 13 is according to the structured flowchart of the another kind of data transmission device of the embodiment of the present invention.

Detailed description of the invention

Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments. It should be noted that, do not rushingIn prominent situation, the feature in embodiment and embodiment in the application can combine mutually.

Fig. 1 is according to the flow chart of the data transmission method of the embodiment of the present invention. The method can be applied to transmittingIn machine, it both can be applied in terminal or terminal transmitter, also can be applied in base station or base station transmitter,As shown in Figure 1, the method can comprise following treatment step:

Step S102: by code book, data-bit-group is mapped as to sequence of complex numbers, wherein, by current outputEvery k data bit is set to data-bit-group, and the length of sequence of complex numbers is L, the whole units in sequence of complex numbersElement is plural number and the real part of each element and the value of imaginary part and all comes from M unit real number set, and k is for being greater thanOr equal 1 integer, and L is greater than 1 integer, and M is more than or equal to 2 integer;

Step S104: sequence of complex numbers is sent.

CDMA access technology in the correlation technique sequence spreading based on binary pseudorandom sequence of real numbers conventionally,Can produce serious multiuser interference, affect multi-user reception and detect performance and multiple access communication performance.Adopt method as shown in Figure 1, transmitter terminal is that length is L by every k data bit by codebook mappingSequence of complex numbers and send, when multiple emitters reflect data bit separately respectively by code book separatelyPenetrate while transmission for sequence of complex numbers and by identical running time-frequency resource, can effectively guarantee that different transmitters sends outLow cross correlation between the number of delivering letters, its reason is: sequence of complex numbers has larger design freedom, more holdsEasily ensure that different transmitters chooses the sequence of complex numbers with low cross correlation its data bit is shone upon; SeparatelyOutward, using every k data bit as a data-bit-group, emitter can also will have the difference of identical valueData-bit-group is mapped as different sequence of complex numbers and realizes interference randomization or equalization. Thus can be effectivelyControl multiuser interference.

In preferred implementation process, above-mentioned data-bit-group is by every k number of the channel encoder output of emitterForm according to bit setting.

Preferably, above-mentioned code book can comprise that N length is more than or equal to the sequence of complex numbers of L, wherein, and NFor being more than or equal to 1 integer, the whole elements in each sequence of complex numbers are the real part of plural number and each elementAll come from M unit real number set with the value of imaginary part.

Preferably, above-mentioned code book can comprise 2^kIndividual length is more than or equal to the sequence of complex numbers of L, wherein, everyWhole elements in individual sequence of complex numbers are plural number and the real part of each element and the value of imaginary part and all come from MUnit's real number set.

Preferably, above-mentioned M unit real number set can include but not limited to one of following:

(1) set of M integer composition in [(M-1)/2, (M-1)/2] scope, wherein, M is odd number;

(2) set of M odd number composition in [(M-1), (M-1)] scope, wherein, M is even number;

(3) M integer in [(M-1)/2, (M-1)/2] scope is multiplied by respectively corresponding normalization coefficient and obtainsThe set of M real number composition, wherein, M is odd number;

(4) M odd number in [(M-1), (M-1)] scope is multiplied by respectively that corresponding normalization coefficient obtainsThe set of M real number composition, wherein, M is even number.

Preferably, in step S102, by code book, data-bit-group being mapped as to sequence of complex numbers can compriseBelow operation:

Step S1: what obtain the length corresponding with every k data bit from code book according to preset rules be LSequence of complex numbers, wherein, above-mentioned preset rules can include but not limited to following one of at least:

(1) the represented index information of value of every k data bit;

(2) the different values of k data bit and the correspondence relationship information of the different sequence of complex numbers in code book;

(3) correspondence relationship information of a sequence of complex numbers in every k data bit and code book;

(4) the residing order information of every k data bit or positional information;

(5) carry out with respect to the quantity of sequence of complex numbers in code book the residing order of every k data bit or positionThe order information or the positional information that obtain after computing rem;

(6) subset information of code book or sub-sequence information;

Step S2: be that length is the sequence of complex numbers of L by every k data bit mapping.

Preferably, in step S102, by code book, data-bit-group being mapped as to sequence of complex numbers can compriseFollowing steps:

Step S3: obtain a data with every k according to preset rules from code book corresponding to every k data bitThe sequence of complex numbers that the length that bit is corresponding is L, wherein, the code corresponding to different values of k data bitThis; Above-mentioned preset rules can include but not limited to following one of at least:

(1) correspondence relationship information of a sequence of complex numbers in the code book that every k data bit is corresponding with it;

(2) the residing order information of every k data bit or positional information;

(3) the residing order of every k data bit or position are with respect to sequence of complex numbers in its corresponding code bookQuantity the rem order information or the positional information that obtain after computing;

(4) subset information or the sub-sequence information of each code book corresponding to the different values of k data bit;

(5) subset information or the sub-sequence information of the code book that every k data bit is corresponding;

Step S4: be that length is the sequence of complex numbers of L by every k data bit mapping.

Step S5: obtain a data with every k according to preset rules from code book corresponding to every k data bitThe sequence of complex numbers that the length that bit is corresponding is L, wherein, every k the corresponding code book of data bit, above-mentionedPreset rules can include but not limited to following one of at least:

(1) the represented index information of value of every k data bit;

(2) the different values of k data bit and different plural numbers in code book corresponding to every k data bitThe correspondence relationship information of sequence;

(3) correspondence relationship information of a sequence of complex numbers in the code book that every k data bit is corresponding with it;

(5) the residing order of every k data bit or position are with respect to sequence of complex numbers in its corresponding code bookQuantity the rem order information or the positional information that obtain after computing;

(6) subset information or the sub-sequence information of the code book that every k data bit is corresponding;

Step S6: be that length is the sequence of complex numbers of L by every k data bit mapping.

Preferably, in step S104, sequence of complex numbers is sent and can be comprised the following steps:

Step S7: sequence of complex numbers is carried out to carrier modulation, and generation transmits, wherein, carrier modulation canSingle-carrier modulated or multi-carrier modulation;

Step S8: launch transmitting.

Fig. 2 is according to the flow chart of the another kind of data transmission method of the embodiment of the present invention. The method can be appliedIn receiver, it both can be applied in base station or base station receiver, also can be applied to terminal or terminal connectsIn receipts machine, as shown in Figure 2, the method can comprise following treatment step:

Step S202: receive the signal of K emitter transmitting, wherein, K is more than or equal to 1 integer,The signal of each emitter transmitting is the sequence of complex numbers that this emitter is by codebook mapping to its data-bit-groupCarry out carrier modulation formation, every k data bit of the current output of each emitter be set to data bitGroup, the length of sequence of complex numbers is L, the whole elements in sequence of complex numbers be plural number and the real part of each element withThe value of imaginary part all comes from M unit real number set, and k is more than or equal to 1 integer, L be greater than 1 wholeNumber, M is more than or equal to 2 integer;

Step S204: obtain the data that K emitter sends according to code book from the signal receiving.

In conjunction with the receiver that adopts interference cancellation signals detector, can effectively improve multiplex by above-mentioned emitterFamily access communications performance, thus higher system overload level can be supported, promote the nonopiate multiple access access of userThe experience of communication.

In a preferred embodiment, interference cancellation signals detector can be serial interference elimination SIC signal detectorDeng.

Preferably, K the applied code book of emitter is different.

In a preferred embodiment, when the above-mentioned data transmission method of the transmitter applies of K in system is when identicalFrequently, while carrying out transfer of data in resource, the code book of applying in each emitter is different, and, K transmittingThe signal of machine transmitting is after wireless channel is propagated, and what receiver received is the signal of K emitter transmittingSuperposed signal.

For concrete signal detecting method, the preferred embodiment of the present invention is not done any restriction. In addition, at signalIn testing process, receiver need to use the code book in the above-mentioned data transmission method being applied in each emitterThe signal of identifying each emitter transmitting, includes but not limited to: refer to by specifying the code book of emitter to identifyDetermine the signal of emitter transmitting or identify by the code book of K emitter the letter that each emitter is launchedNumber or by system all can with code book identify the signal of each emitter transmitting.

Below in conjunction with following preferred embodiment, above-mentioned preferred implementation process is further described.

Preferred embodiment one

Emitter is that length is L's by every 2 data bits of its channel encoder output by codebook mappingSequence of complex numbers, wherein, the set-up mode of code book can be one of following:

(1) systemic presupposition;

(2) system is passed through signal deployment;

(3) determined according to preset rules by emitter, for example: emitter independently generates.

In this code book, can comprise 2²The sequence of complex numbers that=4 length is L (is designated as respectively L₀,L₁,L₂,L₃)，Wherein, L is greater than 1 integer, and each element in each length sequence of complex numbers that is L is plural number,And the real part of each element and the value of imaginary part all come from ternary real number set, the collection being formed by [1,0,1]Close.

The data bit of supposing the output of transmitter channel encoder is: " 0,0,1,0,0,1,1,1,0,1,1,0,1,1,0,0 ", regard every 2 data bits as a data-bit-group: " 00,10,01,11,01,10,11,00 ",So, particularly, emitter is long by every 2 data bits of its channel encoder output by codebook mappingDegree is that the sequence of complex numbers of L is:

Fig. 3 according to the emitter of the preferred embodiment of the present invention one by every k data bit by codebook mapping isLength is the schematic diagram of the sequence of complex numbers of L. As shown in Figure 3, emitter is according to the value of every 2 data bitsRepresented index information is determined the sequence of complex numbers that length corresponding to every 2 data bits is L from code book,And be that determined length is the sequence of complex numbers of L by every 2 data bit mappings. Due to every 2 data ratiosSpecial value is respectively: " 0,2,1,3,1,2,3,0 ", emitter is using the value of every 2 data bits as rope soDraw and from code book, determine that the sequence of complex numbers that length corresponding to every 2 data bits is L is respectively: " L₀,L₂,L₁,L₃,L₁,L₂,L₃,L₀", then, emitter is by every 2 length that data bit mapping is determined correspondenceFor the sequence of complex numbers of L.

Or Fig. 4 is according to the another kind of emitter of the preferred embodiment of the present invention one, every k data bit is logicalCrossing codebook mapping is that length is the schematic diagram of the sequence of complex numbers of L. As shown in Figure 4, emitter is according to 2 numbersFrom code book, determine every 2 according to the different values of bit and the correspondence relationship information of the different sequence of complex numbers in code bookThe sequence of complex numbers that the length that individual data bit is corresponding is L, and be determined by every 2 data bit mappingsLength is the sequence of complex numbers of L; The different values of 2 data bits comprise: 00,01,10,11 4 kind of situation,System one of can be in the following ways determined 4 sequence of complex numbers in these four kinds of different value condition and code bookCorresponding relation:

(1) mode of systemic presupposition;

(2) system for example, by the mode of signal deployment: semi-static control signal or dynamically control signal;

(3) the emitter mode definite according to preset rules;

For example: 00 with sequence of complex numbers L₀Corresponding, 01 and sequence of complex numbers L₁Corresponding, 11 and sequence of complex numbers L₂RightShould, 10 and sequence of complex numbers L₃Corresponding;

So, emitter can be determined according to this corresponding relation every 2 length that data bit is corresponding from code bookFor the sequence of complex numbers of L is respectively: " L₀,L₃,L₁,L₂,L₁,L₃,L₂,L₀", then, emitter is by every 2Data bit is mapped as the sequence of complex numbers that the length of determined correspondence is L.

Or Fig. 5 is according to another emitter of the preferred embodiment of the present invention one, every k data bit is logicalCrossing codebook mapping is that length is the schematic diagram of the sequence of complex numbers of L. As shown in Figure 5, emitter is according to every 2The correspondence relationship information of a sequence of complex numbers in data bit and code book is determined every 2 data ratios from code bookThe sequence of complex numbers that special corresponding length is L, and be that determined length is L by every 2 data bit mappingsSequence of complex numbers; System one of can be in the following ways determines that in every 2 data bits and code book answersThe corresponding relation of Number Sequence:

(1) mode of systemic presupposition;

(3) the emitter mode definite according to preset rules;

For example: " 00,10,01,11,01,10,11,00 " respectively with " L₀,L₁,L₂,L₃,L₀,L₁,L₂,L₃" oneOne correspondence, so, emitter can determine from code book that according to this corresponding relation every 2 data bits are correspondingLength is that the sequence of complex numbers of L is respectively: " L₀,L₁,L₂,L₃,L₀,L₁,L₂,L₃", then, emitter is by every 2The sequence of complex numbers that the length that individual data bit mapping is determined correspondence is L.

Finally, emitter to the sequence of complex numbers obtaining by codebook mapping carry out carrier modulation (for example: based onThe multi-carrier modulation of OFDM etc.), formation transmits, and launches.

In the preferred embodiment, the sequence of complex numbers that the length comprising in code book is L can also be set to otherQuantity, for example: the sequence of complex numbers that 8 length is L (is designated as respectively L₀,L₁,…,L₆,L₇); For 2Four kinds of different value condition 00,01,10,11 of data bit, system can be by default mode orThe mode of signal deployment or emitter are determined each value condition and are somebody's turn to do according to the definite mode of preset rulesTwo sequence of complex numbers correspondences in code book, for example: 00 with sequence of complex numbers L₀、L₁Correspondence, 01 and sequence of complex numbersL₂、L₃Correspondence, 11 with sequence of complex numbers L₄、L₅Correspondence, 10 with sequence of complex numbers L₆、L₇Corresponding; Then,Emitter can be according to every 2 residing order informations of data bit or positional information or every 2 data ratiosIt is suitable that special residing order or position rem and obtain after computing with respect to the quantity of sequence of complex numbers in code bookOrder information or positional information are determined the sequence of complex numbers that length corresponding to every 2 data bits is L. With " 00 "For example, in the time that every 2 data bits " 00 " are positioned at even number order or position, determine the sequence of complex numbers that it is correspondingFor L₀, in the time that every 2 data bits " 00 " are positioned at odd number order or position, determine the plural order of its correspondenceClassify L as₁。

In the preferred embodiment, emitter can be regarded every 2 data bits as a data-bit-group, itsBe similar to every 2 data bit mappings on a constellation point of QPSK modulation constellation. In addition, transmittingMachine can be exported channel encoder in order every 2 data bits as a data-bit-group and pass throughCodebook mapping is sequence of complex numbers; Or emitter can be gone here and there the data bit of channel encoder output alsoConversion, make every 2 data bits become a data-bit-group, then by code book each data bitGroup is mapped as sequence of complex numbers simultaneously, and, each sequence of complex numbers obtaining can be carried out to parallel serial conversion formation againThe sequence of complex numbers finally needing.

In the preferred embodiment, in code book, the real part of each element of each sequence of complex numbers and the value of imaginary part are alsoCan come from binary real number set, the set being formed by [1,1]; Or, can also come from quaternary realManifold is closed, the set being made up of [3 ,-1,1,3] etc.

In the preferred embodiment, the each sequence of complex numbers in code book can also obtain after being multiplied by normalization coefficientNormalization sequence of complex numbers.

In the preferred embodiment, code book can be the form of sequence of complex numbers set, or, can be also plural numberThe form (for example: as shown in table 1) of sequence form, or can be also the form of long sequence of complex numbers.

Table 1

Index	1	2	3	4
					1	1+j	0	j	-1-j
2	-j	1	1-j	-1+j
					…	…	…	…	…
L	1-j	-1+j	1+j	0

In the preferred embodiment, emitter can also be by logical every 2 data bits of its channel encoder outputThe subset of crossing code book is mapped as sequence of complex numbers, and in other words, emitter can be by every 2 data bits by this codeA part of sequence of complex numbers in this is mapped as sequence of complex numbers; Wherein, the subset information of code book can be systemic presuppositionOr system by signal deployment or emitter according to preset rules determine.

In the preferred embodiment, in code book, the length of sequence of complex numbers can also be S, and S is for being greater than LInteger, so, emitter be to grow every 2 data bits of its channel encoder output by codebook mappingThe sequence of complex numbers that degree is L, can be by being mapped as the subsequence reality that corresponding length is the sequence of complex numbers of SExisting; Wherein, system can be advised according to default by the mode of default mode or signal deployment or emitterDefinite mode is obtained the sub-sequence information of code book.

In the preferred embodiment, emitter can also by every 1 data bit of its channel encoder output,Or every 3 data bits or every 4 data bits etc. are sequence of complex numbers by codebook mapping; Accordingly,System or emitter can be adjusted the quantity of the sequence of complex numbers comprising in code book as required, or, pass through code bookThe mode such as subset or subsequence or merging obtain needed code book.

In the preferred embodiment, when the different pieces of information bit group with identical value is passed through codebook mapping by emitterDuring for different sequence of complex numbers, can realize the effect of interference randomization or equalization.

Preferred embodiment two

In the preferred embodiment, emitter can pass through every 2 data bits of its channel encoder outputCodebook mapping is that length is the sequence of complex numbers of L.

And, the code book corresponding to different value condition of 2 data bits, wherein, 2 data bitsDifferent values comprise 00,01,10,11 4 kind of situation, these four kinds different value condition are corresponding different respectivelyCode book, be specially: 00 with code book C₀Correspondence, 01 with code book C₁Correspondence, 10 with code book C₂Correspondence, 11With code book C₃Corresponding; Here, different code books corresponding to the different value condition of 2 data bits can beSystemic presupposition or system by signal deployment or emitter according to preset rules determine (for example:Emitter independently generates);

In each code book, can comprise that the sequence of complex numbers that N length is L (is designated as respectively L₀,L₁,…,L_N-1)，Wherein, N is more than or equal to 1 integer, and L is greater than 1 integer, and what each length was L answersEach element of Number Sequence is plural number, and the real part of each element and the value of imaginary part come from ternary real number set,The set being formed by [1,0,1].

Fig. 6 according to the emitter of the preferred embodiment of the present invention two by every k data bit by codebook mapping isLength is the schematic diagram of the sequence of complex numbers of L. As shown in Figure 6, emitter is according to every 2 data bits and itsThe correspondence relationship information of a sequence of complex numbers in corresponding code book is from code book corresponding to every 2 data bitsDetermine the sequence of complex numbers that length corresponding to every 2 data bits is L, and by every 2 data bit mappings beDetermined length is the sequence of complex numbers of L; System can by the mode of default mode or signal deployment,Or emitter is determined in the code book that every 2 data bits are corresponding with it according to the definite mode of preset rules, a corresponding relation for sequence of complex numbers, for example: " 00,10,01,11,01,10,11,00 " respectively with code book C₀In L₀, code book C₂In L₀, code book C₁In L₀, code book C₃In L₀, code book C₁In L₁、Code book C₂In L₁, code book C₃In L₁, code book C₀In L₁Corresponding one by one, so, emitter canFrom code book corresponding to every 2 data bits, determine every 2 length that data bit is corresponding according to this corresponding relationFor the sequence of complex numbers of L, and the length that is determined correspondence by every 2 the data bit mappings plural number that is LSequence.

Or Fig. 7 is according to the another kind of emitter of the preferred embodiment of the present invention two, every k data bit is logicalCrossing codebook mapping is that length is the schematic diagram of the sequence of complex numbers of L. As shown in Figure 7, emitter is according to every 2The residing order information of data bit or positional information determine every 2 from code book corresponding to every 2 data bitsThe sequence of complex numbers that the length that individual data bit is corresponding is L, and be determined by every 2 data bit mappingsLength is the sequence of complex numbers of L. The quantity of supposing the sequence of complex numbers comprising in each code book is more than or equal to dataThe quantity of bit group, because every 2 residing orders of data bit or position are: " 0,1,2,3,4,5,6,7 ",Emitter is determined every 2 data bits according to this order or position from code book corresponding to every 2 data bitsCorresponding sequence of complex numbers is followed successively by: code book C₀In sequence of complex numbers L₀, code book C₂In sequence of complex numbers L₁、Code book C₁In sequence of complex numbers L₂, code book C₃In sequence of complex numbers L₃, code book C₁In sequence of complex numbers L₄、Code book C₂In sequence of complex numbers L₅, code book C₃In sequence of complex numbers L₆, code book C₀In sequence of complex numbers L₇，Can find out order or position and every 2 of sequence of complex numbers corresponding to every 2 data bits in corresponding code bookThe residing order of individual data bit or position are the same, and then, emitter every 2 data bit mappings isThe length of determined correspondence is the sequence of complex numbers of L; Or, taking " 00 " as example, occur for the 1st time" 00 ", emitter determines that its corresponding sequence of complex numbers is the L in code book C0₀, for the 2nd time occur" 00 ", emitter determines that its corresponding sequence of complex numbers is code book C₀In L₁, in like manner, emitter can be trueFixed every 2 sequence of complex numbers that data bit is corresponding, then, emitter every 2 data bit mappings for trueThe sequence of complex numbers that fixed corresponding length is L.

Or, emitter according to every 2 residing orders of data bit or position with respect in its corresponding code bookThe quantity of sequence of complex numbers rems the order information that obtains after computing or positional information from every 2 data ratiosIn special corresponding code book, determine the sequence of complex numbers that length corresponding to every 2 data bits is L, and by every 2Data bit is mapped as the sequence of complex numbers that determined length is L; Suppose the plural order comprising in each code bookThe quantity of row is more than or equal to the quantity of data-bit-group, due to every 2 residing orders of data bit or positionFor " 0,1,2,3,4,5,6,7 ", every 2 residing orders of data bit or position are with respect to its correspondenceIn code book, the quantity of sequence of complex numbers order or the position obtaining after computing that rem is: 0modN=0,1modN＝1、2modN＝2、3modN＝3、4modN＝4、5modN＝5、6modN＝6、7modN=7, wherein, mod represents the computing that rems, so, emitter according to this order or position from oftenIn code book corresponding to 2 data bits, determine that every 2 sequence of complex numbers corresponding to data bit are followed successively by: code bookC₀In sequence of complex numbers L₀, code book C₂In sequence of complex numbers L₁, code book C₁In sequence of complex numbers L₂, code bookC₃In sequence of complex numbers L₃, code book C₁In sequence of complex numbers L₄, code book C₂In sequence of complex numbers L₅, code bookC₃In sequence of complex numbers L₆, code book C₀In sequence of complex numbers L₇, then, emitter is by every 2 data bitsThe sequence of complex numbers that the length that is mapped as determined correspondence is L; Or, taking " 00 " as example, for the 1st" 00 " of inferior appearance, the code book C that it is corresponding with respect to " 00 "₀The quantity N of middle sequence of complex numbers carries out complementationThe order information or the positional information that after number computing, obtain are: (1-1) modN=0, emitter determines that it is rightThe sequence of complex numbers of answering is code book C₀In L₀, for " 00 " of the 2nd appearance, it is right with respect to " 00 "The code book C answering₀The quantity N of middle sequence of complex numbers the rem order information or the positional information that obtain after computingFor (2-1) modN=1, emitter determines that its corresponding sequence of complex numbers is code book C₀In L₁, in like manner,Emitter can be determined every 2 sequence of complex numbers that data bit is corresponding, and then, emitter is every 2 data ratiosSpy is mapped as the sequence of complex numbers that the length of determined correspondence is L.

Finally, emitter carries out carrier modulation to the sequence of complex numbers obtaining by codebook mapping, and formation transmits,And launch.

In the preferred embodiment, what the quantity of the sequence of complex numbers comprising in each code book can be with data-bit-groupQuantity is identical, also can be different from the quantity of data-bit-group.

In the preferred embodiment, emitter can also be according to every 2 residing odd numbers of data bit or even bitPut and from code book corresponding to every 2 data bits, determine the plural number that length corresponding to every 2 data bits is LSequence; For example: with 2 data bits " 00 " with and corresponding code book C₀For example, suppose code book C₀InComprise that the sequence of complex numbers that 2 length are L (is designated as respectively L₀,L₁), when " 00 " is during in even number position,Emitter determines that its corresponding sequence of complex numbers is L₀, when " 00 " is during in odd positions, emitter is determined itCorresponding sequence of complex numbers is L₁; In like manner, emitter can also be according to every 2 the residing position of data bit phasesFor the quantity of the sequence of complex numbers in its corresponding code book the rem odd number or the even bit that obtain after computingPut and from code book corresponding to every 2 data bits, determine every 2 sequence of complex numbers that data bit is corresponding.

Preferred embodiment three

In the preferred embodiment, every 2 data bits of its channel encoder output are passed through code book by emitterBe mapped as the sequence of complex numbers that length is L;

And, the corresponding code book of every 2 data bits, each code book comprises answering that N length is LNumber Sequence (is designated as respectively L₀,L₁,…,L_N-1), wherein, N is more than or equal to 1 integer, and L is for being greater than1 integer, each element of the sequence of complex numbers that each length is L is plural number, and the real part of each element and voidThe value of portion comes from ternary real number set, the set being made up of [1,0,1]; Every 2 data bit correspondencesA code book can be systemic presupposition or system by signal deployment or emitter according to default(for example: emitter independently generates) that rule is determined;

The data bit of supposing the output of transmitter channel encoder is: " 0,0,1,0,0,1,1,1,0,1,1,0,1,1,0,0 ", every 2 data bits are regarded as to a data-bit-group: " 00,10,01,11,01,10,11,00 ",And suppose that the code book that every 2 data bits are corresponding is respectively: C₀、C₁、C₂、C₃、C₄、C₅、C₆、C₇, so, particularly, every 2 data bits of its channel encoder output are passed through codebook mapping by emitterThe sequence of complex numbers that is L for length is:

Fig. 8 according to the emitter of the preferred embodiment of the present invention three by every k data bit by codebook mapping isLength is the schematic diagram of the sequence of complex numbers of L. As shown in Figure 8, emitter is according to the value of every 2 data bitsRepresented index information is determined every 2 length that data bit is corresponding from code book corresponding to every 2 data bitsDegree is the sequence of complex numbers of L, and is that determined length is the sequence of complex numbers of L by every 2 data bit mappings;Here further the each code book of hypothesis comprises that the sequence of complex numbers that 4 length are L (is designated as respectively L₀,L₁,L₂,L₃), because the value of every 2 data bits is respectively: " 0,2,1,3,1,2,3,0 ", emitter is by every 2The value of data bit is determined every 2 data bit correspondences from code book corresponding to every 2 data bits as indexLength be L sequence of complex numbers is respectively: code book C₀In sequence of complex numbers L₀, code book C₁In plural orderRow L₂, code book C₂In sequence of complex numbers L₁, code book C₃In sequence of complex numbers L₃, code book C₄In plural orderRow L₁, code book C₅In sequence of complex numbers L₂, code book C₆In sequence of complex numbers L₃, code book C₇In plural orderRow L₀, then, the plural number that the length that emitter is determined correspondence by every 2 data bit mappings is LSequence.

Or Fig. 9 is according to the another kind of emitter of the preferred embodiment of the present invention three, every k data bit is logicalCrossing codebook mapping is that length is the schematic diagram of the sequence of complex numbers of L. As shown in Figure 9, emitter is according to 2 numbersAccording to the different values of bit and the corresponding relation of the different sequence of complex numbers in code book corresponding to every 2 data bitsInformation is determined answering that length corresponding to every 2 data bits is L from code book corresponding to every 2 data bitsNumber Sequence, and be that determined length is the sequence of complex numbers of L by every 2 data bit mappings; Here enter oneThe each code book of step hypothesis comprises that the sequence of complex numbers that 4 length are L (is designated as respectively L₀,L₁,L₂,L₃), byIn the different values of 2 data bits comprise 00,01,10,11 4 kind of situation, these four kinds different value feelingsThe corresponding relation of 4 sequence of complex numbers in a condition code book corresponding with every 2 data bits can be pre-by systemIf or determined according to preset rules by signal deployment or by emitter by system, for example: eachIn code book, 00 with sequence of complex numbers L₀Correspondence, 01 with sequence of complex numbers L₁Correspondence, 11 with sequence of complex numbers L₂Correspondence,10 with sequence of complex numbers L₃Correspondence, so, emitter is corresponding from every 2 data bits according to this corresponding relationIn code book, determine that the sequence of complex numbers that length corresponding to every 2 data bits is L is respectively: code book C₀In answerNumber Sequence L₀, code book C₁In sequence of complex numbers L₃, code book C₂In sequence of complex numbers L₁, code book C₃In answerNumber Sequence L₂, code book C₄In sequence of complex numbers L₁, code book C₅In sequence of complex numbers L₃, code book C₆In answerNumber Sequence L₂, code book C₇In sequence of complex numbers L₀, then, emitter is institute by every 2 data bit mappingsThe sequence of complex numbers that the corresponding length of determining is L.

Or emitter is corresponding according to a sequence of complex numbers in every 2 data bits code book corresponding with itRelation information determines that from code book corresponding to every 2 data bits length corresponding to every 2 data bits is LSequence of complex numbers, and be that determined length is the sequence of complex numbers of L every 2 data bit mappings; SystemCan come according to the definite mode of preset rules by the mode of default mode or signal deployment or emitterDetermine the corresponding relation of a sequence of complex numbers in the code book that every 2 data bits are corresponding with it, for example: " 00,10,01,11,01,10,11,00 " respectively with code book C₀In sequence of complex numbers L₀, code book C₁In sequence of complex numbersL₃, code book C₂In sequence of complex numbers L₁, code book C₃In sequence of complex numbers L₂, code book C₄In sequence of complex numbersL₁, code book C₅In sequence of complex numbers L₃, code book C₆In sequence of complex numbers L₂, code book C₇In sequence of complex numbersL₀Corresponding one by one, so, emitter according to this correspondence relationship information from every 2 code books that data bit is correspondingIn determine length corresponding to every 2 data bits sequence of complex numbers that is L, and by every 2 data bit mappingsFor the length of the determined correspondence sequence of complex numbers that is L.

In the preferred embodiment, emitter can also be in conjunction with every 2 residing order informations of data bit or positionPut information or every 2 residing orders of data bit or position with respect to sequence of complex numbers in its corresponding code bookThe rem order information or the positional information that obtain after computing of quantity corresponding from every 2 data bitsIn code book, determine every 2 sequence of complex numbers that data bit is corresponding, repeat no more herein.

Preferred embodiment four

In the preferred embodiment, Figure 10 enters respectively according to the K of the preferred embodiment of the present invention four emitterRow transfer of data and receiver carry out serial interference elimination SIC and receive the schematic diagram detecting. As shown in figure 10,In system, have K emitter to carry out multiple access access communications, system is K transmitting by default mode simultaneouslyMachine is preset different code books, or system is that K transmitter configuration is different by the mode of signal deploymentCode book, or K emitter determines that according to preset rules different code books is (for example: K emitter is independentGenerate different code books); Wherein, K is greater than 1 integer.

The code book of each emitter can comprise that N length is more than or equal to the sequence of complex numbers of L, and wherein, N isBe more than or equal to 1 integer, L is greater than 1 integer, and each element of each sequence of complex numbers is plural number and everyThe real part of individual element and the value of imaginary part come from M unit real number set, and M is more than or equal to 2 integer.

K emitter by the data bit of channel encoder output separately according to every k data bit is respectivelyOne group is that length is the sequence of complex numbers of L by codebook mapping separately, the sequence of complex numbers that this length is L everyIndividual element is that plural number and the real part of each element and the value of imaginary part come from M unit real number set, wherein, and kTo be more than or equal to 1 integer.

Then, K emitter carries out the sequence of complex numbers obtaining by codebook mapping on identical running time-frequency resourceCarrier modulation (for example: the multi-carrier modulation based on OFDM etc.), forms transmitting separately, sends toReceiver.

System receiver receives the signal of K emitter transmitting, adopts serial interference elimination SIC signal detectionDevice receives detection to the received signal, obtains the data that K emitter sends.

Because K emitter forms signal separately and send to receiver on identical running time-frequency resource, that, after multiple access access wireless channel is propagated, what receiver received is the signal of K emitter transmittingSuperposed signal.

System receiver adopts SIC signal detector to receive to the received signal while detection, needs to useThe code book that is applied to each emitter is identified the signal of K emitter transmitting, includes but not limited to: useSpecify the code book of emitter to identify the signal of specifying emitter transmitting or the code book that uses K emitterIdentifying the signal of each emitter transmitting or all available codes of use system originally identified each emitter and sent outThe signal of penetrating.

Based on above preferred embodiment, in actual application, can be applied to but be not limited to following system orScene:

(1) MC-CDMA system;

For MC-CDMA system, adopt above preferred embodiment, emitter is by every k data ratioSpecial is that length is that the sequence of complex numbers of L sends by codebook mapping, and multiple emitters can be by number separatelyBe sequence of complex numbers by codebook mapping separately respectively and send by identical running time-frequency resource according to bit. ConnectReceipts machine is receiving after the signal of multiple emitter transmittings, adopts interference cancellation signals detector to multiple emittersThe signal of transmitting receives detection; Owing to having adopted the sequence of complex numbers with the larger free degree, can effectively protectLow cross correlation between the signal of card different transmitters transmitting, receiver employing interference cancellation signals detector canEffectively to distinguish the data that use multiple emitters of identical running time-frequency resource to send. In addition, by every k dataBit is regarded a data-bit-group as, and emitter can also be by the different pieces of information bit group with identical value by codeOriginally be mapped as different sequence of complex numbers and realize interference randomization or equalization. Therefore, by above preferred embodimentBe applied to MC-CDMA system and can effectively control multiuser interference, in conjunction with adopting interference cancellation signalsThe receiver of detector, can improve multiple access communication performance effectively, thus can support higher beSystem overload level, promotes the experience of the nonopiate multiple access access communications of user.

(2) contention access scene;

For contention access scene, adopt above preferred embodiment, multiple even a large number of users terminals are passableAsk connecting system simultaneously, in conjunction with the receiver that adopts interference cancellation signals detector, can effectively distinguish notWith the signal of transmitting that accesses terminal, thereby can support higher system overload level, improvement system effectively connectsEnter efficiency and improve terminal access and experience.

(3) exempt from scheduling access scene;

For exempting from scheduling access scene, adopt above preferred embodiment, when user terminal need to send dataCan on available running time-frequency resource, carry out transfer of data, multiple user terminals can use identical time-frequency simultaneouslyResource is carried out transfer of data, in conjunction with the receiver that adopts interference cancellation signals detector, can effectively distinguish eachThe signal of individual terminal transmitting, thus higher system overload level can be supported, promote multiple user terminals and exempt to adjustDegree access and the experience of communicating by letter, can also reduce system call signaling simultaneously, reduces terminal access delay.

Figure 11 is according to the structured flowchart of the data transmission device of the embodiment of the present invention. As shown in figure 11, this numberReportedly conveying device can comprise: mapping block 10, and for data-bit-group being mapped as to plural order by code bookRow, wherein, every k data bit of current output is set to data-bit-group, and the length of sequence of complex numbers isL, the whole elements in sequence of complex numbers are plural number and the real part of each element and the value of imaginary part and all come from MUnit's real number set, k is more than or equal to 1 integer, and L is greater than 1 integer, and M is for being more than or equal to 2Integer; Sending module 20, for sending sequence of complex numbers.

Adopt device as shown in figure 11, solved the CDMA access technology in correlation technique conventionally based onThe sequence spreading of binary pseudorandom sequence of real numbers, can produce serious multiuser interference, affects multi-user receptionDetect the problem of performance and multiple access communication performance, so can effectively control multiuser interference andEffectively improve multiple access communication performance.

Preferably, data-bit-group is formed by every k data bit setting of the channel encoder output of emitter.

Preferably, above-mentioned M unit real number set can comprise one of following:

Preferably, as shown in figure 12, mapping block 10 can comprise: the first acquiring unit 100, and for pressingFrom code book, obtain the sequence of complex numbers that the length corresponding with every k data bit is L according to preset rules, wherein,Above-mentioned preset rules can include but not limited to following one of at least:

(1) the represented index information of value of every k data bit;

(6) subset information of code book or sub-sequence information;

The first map unit 102, for being that length is the sequence of complex numbers of L by every k data bit mapping.

Preferably, as shown in figure 12, mapping block 10 can comprise: second acquisition unit 104, and for pressingFrom code book corresponding to every k data bit, obtaining the length corresponding with every k data bit according to preset rules isThe sequence of complex numbers of L, wherein, the code book corresponding to different values of k data bit; Above-mentioned preset rulesCan include but not limited to following one of at least:

The second map unit 106, for being that length is the sequence of complex numbers of L by every k data bit mapping.

Preferably, as shown in figure 12, mapping block 10 can comprise: the 3rd acquiring unit 108, and for pressingFrom code book corresponding to every k data bit, obtaining the length corresponding with every k data bit according to preset rules isThe sequence of complex numbers of L, wherein, the corresponding code book of every k data bit, above-mentioned preset rules can comprise butBe not limited to following one of at least:

(1) the represented index information of value of every k data bit;

The 3rd map unit 110, for being that length is the sequence of complex numbers of L by every k data bit mapping.

Preferably, as shown in figure 12, sending module 20 can comprise: generation unit 200, and for to plural numberSequence is carried out carrier modulation, and generation transmits, and wherein, carrier modulation can be single-carrier modulated or multicarrierModulation; Transmitting element 202, for launching transmitting.

Figure 13 is according to the structured flowchart of the another kind of data transmission device of the embodiment of the present invention. As shown in figure 13,This data transmission device can comprise: receiver module 30, and for receiving the signal of K emitter transmitting, itsIn, K is more than or equal to 1 integer, and the signal of each emitter transmitting is that this emitter is to its data bitThe sequence of complex numbers that group by codebook mapping is carries out carrier modulation formation, and each emitter is every by current outputK data bit is set to data-bit-group, and the length of sequence of complex numbers is L, the whole elements in sequence of complex numbersBe plural number and the real part of each element and the value of imaginary part and all come from the first real number set of M, k for being greater than orEqual 1 integer, L is greater than 1 integer, and M is more than or equal to 2 integer; Acquisition module 40,For obtaining from the signal receiving the data that K emitter sends according to code book.

Preferably, K the applied code book of emitter is different.

As can be seen from the above description, above-described embodiment realized following technique effect (need explanationThat these effects are effects that some preferred embodiment can reach): the skill that adopts the embodiment of the present invention to provideArt scheme, is that length is that the sequence of complex numbers of L sends by every k data bit by codebook mapping, whenMultiple emitters are sequence of complex numbers by data bit separately by codebook mapping separately respectively and pass through identicalRunning time-frequency resource while sending, can effectively guarantee the low cross-correlation between signal that different transmitters sendsProperty; In addition, regard every k data bit as a data-bit-group, emitter can also will have identical valueDifferent pieces of information bit group be that different sequence of complex numbers is realized interference randomization or equalization by codebook mapping,Thereby can effectively control multiuser interference, in conjunction with the reception of existing employing interference cancellation signals detectorMachine, can improve multiple access communication performance effectively, and then can support higher system overload level,Promote the experience of the nonopiate multiple access access communications of user.

Obviously, it is apparent to those skilled in the art that above-mentioned of the present invention each module or each step can useGeneral calculation element is realized, and they can concentrate on single calculation element, or is distributed in multiple metersOn the network that calculation device forms, alternatively, they can be realized with the executable program code of calculation element,Thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, canTo carry out shown or described step with the order being different from herein, or they are made into respectively to each collectionBecome circuit module, or the multiple modules in them or step are made into single integrated circuit module realize.Like this, the present invention is not restricted to any specific hardware and software combination.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for this areaTechnical staff, the present invention can have various modifications and variations. It is within the spirit and principles in the present invention all,Any amendment of doing, be equal to replacement, improvement etc., within protection scope of the present invention all should be included in.

Claims

1. a data transmission method, is characterized in that, comprising:

By code book, data-bit-group is mapped as to sequence of complex numbers, wherein, by every k number of current outputBe set to described data-bit-group according to bit, the length of described sequence of complex numbers is L, in described sequence of complex numbersWhole elements be plural number and the real part of each element and the value of imaginary part all come from the first set of real numbers of MClose, k is more than or equal to 1 integer, and L is greater than 1 integer, M be more than or equal to 2 wholeNumber;

Described sequence of complex numbers is sent.

2. method according to claim 1, is characterized in that, by current the channel encoder of emitter outputEvery k data bit be set to described data-bit-group.

3. method according to claim 1, is characterized in that, described code book comprise that N length is greater than orEqual the sequence of complex numbers of L, wherein, N is more than or equal to 1 integer, complete in each sequence of complex numbersPortion's element is plural number and the real part of each element and the value of imaginary part and all comes from the first set of real numbers of described MClose.

4. method according to claim 1, is characterized in that, described code book comprises 2^kIndividual length be greater than orEqual the sequence of complex numbers of L, wherein, the whole elements in each sequence of complex numbers are plural number and each elementReal part and the value of imaginary part all come from described M unit real number set.

5. method according to claim 1, is characterized in that, described M unit real number set comprise following itOne:

[-(M-1)/2, (M-1)/2] set of M integer composition in scope, wherein, M is odd number;

[-(M-1), (the M-1)] set of M odd number composition in scope, wherein, M is even number;

[-(M-1)/2, (M-1)/2] M integer in scope is multiplied by respectively corresponding normalization coefficient and obtainsThe set of M real number composition, wherein, M is odd number;

[-(M-1), (M-1)] M odd number in scope is multiplied by respectively the M that corresponding normalization coefficient obtainsThe set of individual real number composition, wherein, M is even number.

6. method according to claim 1, is characterized in that, by described code book by described data-bit-groupBeing mapped as described sequence of complex numbers comprises:

From described code book, obtain the institute that the length corresponding with every k data bit is L according to preset rulesState sequence of complex numbers, wherein, described preset rules comprise following one of at least: the value of every k data bitRepresented index information, the different values of k data bit and different sequence of complex numbers in described code bookCorrespondence relationship information, the corresponding relation of a sequence of complex numbers in every k data bit and described code bookInformation, the residing order information of every k data bit or positional information, every k data bit is residingIt is suitable that order or position rem and obtain after computing with respect to the quantity of sequence of complex numbers in described code bookOrder information or positional information, the subset information of described code book or sub-sequence information;

Be that length is the described sequence of complex numbers of L by described every k data bit mapping.

7. method according to claim 1, is characterized in that, by described code book by described data-bit-groupBeing mapped as described sequence of complex numbers comprises:

Obtain from code book corresponding to every k data bit according to preset rules and described every k data ratioThe described sequence of complex numbers that special corresponding length is L, wherein, the different value correspondences of k data bit are notSame code book; Described preset rules comprise following one of at least: the code that every k data bit is corresponding with itThe correspondence relationship information of a sequence of complex numbers in this, the residing order information of every k data bit or positionPut information, the residing order of every k data bit or position are with respect to sequence of complex numbers in its corresponding code bookQuantity the rem order information or the positional information that obtain after computing, the difference of k data bitSubset information or the sub-sequence information of each code book corresponding to value, the code book that every k data bit is correspondingSubset information or sub-sequence information;

8. method according to claim 1, is characterized in that, by described code book by described data-bit-groupBeing mapped as described sequence of complex numbers comprises:

Obtain from code book corresponding to every k data bit according to preset rules and described every k data ratioThe described sequence of complex numbers that special corresponding length is L, wherein, every k the corresponding code book of data bit,Described preset rules comprise following one of at least: the represented index information of value of every k data bit,The different values of k data bit and different sequence of complex numbers in code book corresponding to every k data bitCorrespondence relationship information, the corresponding pass of a sequence of complex numbers in every k data bit code book corresponding with itBe information, the residing order information of every k data bit or positional information, every k data bit is of living inOrder or position rem after computing with respect to the quantity of sequence of complex numbers in its corresponding code bookThe order information arriving or positional information, the subset information of the code book that every k data bit is corresponding or subsequenceInformation;

9. according to the method described in any one in claim 1 to 8, it is characterized in that, described sequence of complex numbers is enteredRow sends and comprises:

Described sequence of complex numbers is carried out to carrier modulation, and generation transmits;

Described transmitting launched.

10. a data transmission method, is characterized in that, comprising:

The signal that receives K emitter transmitting, wherein, K is more than or equal to 1 integer, Mei GefaThe signal of penetrating machine transmitting is that the sequence of complex numbers that this emitter is enters by codebook mapping to its data-bit-groupRow carrier modulation forms, and every k data bit of the current output of each emitter is set to described numberAccording to bit group, the length of described sequence of complex numbers is L, and the whole elements in described sequence of complex numbers are plural numberAnd the real part of each element and the value of imaginary part all come from M unit real number set, and k is for being more than or equal to 1Integer, L is greater than 1 integer, M is more than or equal to 2 integer;

From the described signal receiving, obtain the number that a described K emitter sends according to described code bookAccording to.

11. methods according to claim 10, is characterized in that, adopt the interference cancellation signals inspection of receiverSurvey device the described signal receiving is received to detection, obtain the data that a described K emitter sends.

12. methods according to claim 10, is characterized in that, the signal of described K emitter transmitting isWhat a described K emitter formed respectively on identical running time-frequency resource transmits.

13. methods according to claim 10, is characterized in that, the applied code book of a described K emitterDifferent.

14. 1 kinds of data transmission devices, is characterized in that, comprising:

Mapping block, for data-bit-group being mapped as to sequence of complex numbers by code book, wherein, by currentEvery k data bit of output is set to described data-bit-group, and the length of described sequence of complex numbers is L,Whole elements in described sequence of complex numbers are plural number and the real part of each element and the value of imaginary part all to be comeFrom in M unit real number set, k is more than or equal to 1 integer, and L is greater than 1 integer, and M is largeIn or equal 2 integer;

Sending module, for sending described sequence of complex numbers.

15. devices according to claim 14, is characterized in that, by current the channel encoder of emitter defeatedEvery k the data bit going out is set to described data-bit-group.

16. devices according to claim 14, is characterized in that, described code book comprise that N length is greater than orEqual the sequence of complex numbers of L, wherein, N is more than or equal to 1 integer, complete in each sequence of complex numbersPortion's element is plural number and the real part of each element and the value of imaginary part and all comes from the first set of real numbers of described MClose.

17. devices according to claim 14, is characterized in that, described code book comprises 2^kIndividual length be greater than orEqual the sequence of complex numbers of L, wherein, the whole elements in each sequence of complex numbers are plural number and each elementReal part and the value of imaginary part all come from described M unit real number set.

18. devices according to claim 14, is characterized in that, described M unit real number set comprise following itOne:

19. devices according to claim 14, is characterized in that, described mapping block comprises:

The first acquiring unit, for obtaining a data bit with every k according to preset rules from described code bookThe described sequence of complex numbers that corresponding length is L, wherein, described preset rules comprise following one of at least:The represented index information of value of every k data bit, the different values of k data bit and described codeThe correspondence relationship information of the different sequence of complex numbers in this, in every k data bit and described code book oneThe correspondence relationship information of sequence of complex numbers, the residing order information of every k data bit or positional information, everyComplementation is carried out with respect to the quantity of sequence of complex numbers in described code book in k residing order of data bit or positionThe order information or the positional information that after number computing, obtain, the subset information of described code book or sub-sequence information;

The first map unit, for being that length is the described plural number of L by described every k data bit mappingSequence.

20. devices according to claim 14, is characterized in that, described mapping block comprises:

Second acquisition unit, for obtaining from code book corresponding to every k data bit according to preset rulesThe described sequence of complex numbers that the length corresponding with described every k data bit is L, wherein, k data ratioSpecial code book corresponding to different values; Described preset rules comprise following one of at least: every k numberAccording to the correspondence relationship information of a sequence of complex numbers in the bit code book corresponding with it, every k data bitResiding order information or positional information, the residing order of every k data bit or position are right with respect to itThe rem order information or the positional information that obtain after computing of the quantity of sequence of complex numbers in the code book of answering,Subset information or the sub-sequence information of each code book corresponding to the different values of k data bit, every kThe subset information of the code book that data bit is corresponding or sub-sequence information;

The second map unit, for being that length is the described plural number of L by described every k data bit mappingSequence.

21. devices according to claim 14, is characterized in that, described mapping block comprises:

The 3rd acquiring unit, for obtaining from code book corresponding to every k data bit according to preset rulesThe described sequence of complex numbers that the length corresponding with described every k data bit is L, wherein, every k dataThe corresponding code book of bit, described preset rules comprise following one of at least: the value of every k data bitRepresented index information, the code book that the different values of k data bit are corresponding with every k data bitIn the correspondence relationship information of different sequence of complex numbers, one in every k data bit code book corresponding with itThe correspondence relationship information of individual sequence of complex numbers, the residing order information of every k data bit or positional information,The residing order of every k data bit or position are entered with respect to the quantity of sequence of complex numbers in its corresponding code bookThe order information or the positional information that after the capable computing that rems, obtain, the code book that every k data bit is correspondingSubset information or sub-sequence information;

The 3rd map unit, for being that length is the described plural number of L by described every k data bit mappingSequence.

22. according to claim 14 to the device described in any one in 21, it is characterized in that described sending module bagDraw together:

Generation unit, for described sequence of complex numbers is carried out to carrier modulation, generation transmits;

Transmitting element, for launching described transmitting.

23. 1 kinds of data transmission devices, is characterized in that, comprising:

Receiver module, for receiving the signal of K emitter transmitting, wherein, K is for being more than or equal to 1Integer, the signal of each emitter transmitting is that this emitter is by codebook mapping to its data-bit-groupSequence of complex numbers carry out carrier modulation formation, each emitter is every k data bit of current outputBe set to described data-bit-group, the length of described sequence of complex numbers is L, whole in described sequence of complex numbersElement is plural number and the real part of each element and the value of imaginary part and all comes from M unit real number set, and k isBe more than or equal to 1 integer, L is greater than 1 integer, and M is more than or equal to 2 integer;

Acquisition module, for obtaining described K transmitting according to described code book from the described signal receivingThe data that machine sends.

24. devices according to claim 23, is characterized in that, adopt the interference cancellation signals inspection of receiverSurvey device the described signal receiving is received to detection, obtain the data that a described K emitter sends.

25. devices according to claim 23, is characterized in that, the signal of described K emitter transmitting isWhat a described K emitter formed respectively on identical running time-frequency resource transmits.

26. devices according to claim 23, is characterized in that, the applied code book of a described K emitterDifferent.