CN103532608A - Multi-user combined detecting method and device thereof - Google Patents

Multi-user combined detecting method and device thereof Download PDF

Info

Publication number
CN103532608A
CN103532608A CN201210227420.4A CN201210227420A CN103532608A CN 103532608 A CN103532608 A CN 103532608A CN 201210227420 A CN201210227420 A CN 201210227420A CN 103532608 A CN103532608 A CN 103532608A
Authority
CN
China
Prior art keywords
matrix
user
signal
complex
conjugate transpose
Prior art date
Application number
CN201210227420.4A
Other languages
Chinese (zh)
Other versions
CN103532608B (en
Inventor
董雪涛
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to CN201210227420.4A priority Critical patent/CN103532608B/en
Publication of CN103532608A publication Critical patent/CN103532608A/en
Application granted granted Critical
Publication of CN103532608B publication Critical patent/CN103532608B/en

Links

Abstract

The present invention provides a multi-user combined detecting method and a device thereof, wherein, the method comprises a step of: at the receiving end of an uplink control channel, detecting a received signal Y through tensor operation for acquiring transmission information of each user, wherein, detecting the received signal through tensor operation for acquiring the transmission information of each user comprises the following processes: performing complex conjugate transpose multiplication on a signal Yant matrix which is obtained from the received signal Y through a first preset sorting role, an initial matrix of the matrix which is composed of transmission information of each user on one time slot and a spread spectrum matrix W of each user; receiving a channel estimation matrix of each user on each receiving antenna; and performing complex conjugate transpose multiplication on the signal Ysym matrix which is obtained from the receiving signal Y through a second preset sorting role, the matrix W and the matrix, thereby obtaining the transmission information of each user on the time slot. The multi-user combined detecting method of the invention settles the problems of large calculation amount and high realization difficulty in the multi-user combined detecting method, thereby reducing calculation amount and reducing realizing difficulty of the method.

Description

The method of multiuser detection and device

Technical field

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

Background technology

At Long Term Evolution (Long Term Evolution, referred to as LTE) in, ascending control channel is divided into form (format) 1/1a/1b and form 2/2a/2b, wherein, form 1 series is for dispatch request (Scheduling Request, referred to as SR) and acknowledge character (Acknowledgement, referred to as ACK)/non-acknowledge character (Non-Acknowledgement, referred to as NACK) transmission, form 2 series are for channel quality indication (Channel Quality Indication, referred to as CQI) and ACK/NACK transmission, subscriber equipment (User Equipment, referred to as UE) according to the kind combination of signal to be sent, select corresponding form.Physical Uplink Control Channel (Physical Uplink Control Channel, referred to as PUCCH) and Physical Uplink Shared Channel (Physical Uplink Shared Channel, referred to as PUSCH) an important difference be the frequency-domain and time-domain resource that a plurality of user's concurrent multiplexings are identical, at receiving terminal, need to detect all users' information, first, matrix tensor operation (Kronecker tensor) is described.With " ο " representing matrix tensor multiplication, establishing matrix A is that the capable n column matrix of m and B are the capable q column matrix of p:

For example: A = a 1 a 2 a 3 = a 11 a 12 a 13 a 21 a 22 a 23 , B = b 1 b 2 = b 11 b 12 b 21 b 22 b 31 b 32 ,

?

If the columns of matrix A and matrix B is identical, define so respective column tensor operation symbol " ◇ ".For example:

A = a 11 a 12 a 13 a 21 a 22 a 23 = a 1 a 2 a 3 , B = b 11 b 12 b 13 b 21 b 22 b 23 = b 1 b 2 b 3

So,

According to LTE agreement (TS36.211) when general cyclic prefix (Normal CP),

Ascending control channel (PUCCH) form 2(format2) under pattern, have 7 symbols in each time slot, wherein, some symbols are used for transmitting pilot reference symbol, and some symbols are used for transmitting data symbol.Make s urepresent the information that u user transmits on these 7 symbols, s ucan be expressed as column vector s u = s 0 u , s 1 u , s 2 u , s 3 u , s 4 u , s 5 u , s 6 u T , " T " represents transposition.

For ascending control channel (PUCCH) form 2(format2) symbol at each time slot internal symbol l=1 and l=5 for transmission pilot reference symbol, l=0,2,3,4,6 symbols that are data symbol.Be s ucan be expressed as s u = s 0 u , s 1 u = 1 , s 2 u , s 3 u , s 4 u , s 5 u = 1 , s 6 u T .

For ascending control channel (PUCCH) form 1/1a/1b(format1/1a/1b) pattern under, at each time slot internal symbol l=2,3 and the l=4 symbol that is transmission pilot reference symbol, it has quadrature spread on time orientation, therefore, be equivalent to transmit on it orthogonal code, each user's orthogonal code can be the same or different, but in advance always known.In like manner, on the symbol for data symbol, also there is similar time orientation quadrature spread, so, s ucan be expressed as s u = s 0 u , s 1 u , s 2 u = p 0 u , s 3 u = , p 1 u s 4 u = , p 2 u s 5 u , s 6 u T , Now with to have comprised the quadrature spread on time orientation.

Each symbol is multiplied by u user's frequency expansion sequence w u, w ufor receiving end and all known length of the making a start CAZAC column vector sequence that is 12.But it should be noted that, in agreement TS36.211, the frequency expansion sequence of user on distinct symbols l is different, according to symbol l, increased cyclic shift fixing, definite and that user is irrelevant to reduce mutual interference, at receiving terminal, can do corresponding anti-processing to the multi-user's who receives mixed signal, therefore here the frequency expansion sequence Direct Modeling between each symbol of user u l is identical w u.

being the channel effect that u user is subject on antenna a, is a scalar.Note h u = h 1 u · · · h A u T , Wherein A is reception antenna number, h urepresent the channel effect of u user on each antenna.

Make S=[s 1s u], W=[w 1w u], H=[h 1h u], can be with matrix notation system equation

Y ant=(S ◇ W) H t+ N, or

Y sym=(W◇H)·S T+N,

N wherein represents noisiness, S ◇ W=[s 1ο w 1... s uο w u], W ◇ H=[w 1ο h 1... w uο h u].Y antthe matrix of (12*7) * A, Y symit is the matrix of (12A) * 7.Y antand Y symto same group, to receive signal Y to arrange gained according to different modes.Receive signal Y according to the structure of subcarrier, symbol and three amounts of antenna as shown in Figure 1, w is subcarrier direction, and s is symbol direction, and a is antenna direction.

Signal Y antin a be listed as the reception data on corresponding a antenna, in a row, be to form according to the order of first subcarrier, rear symbol receiving signal, as shown in Figure 2.

Y syml be listed as the reception data on corresponding l symbol, in l row, be to form according to the order of first antenna, rear subcarrier receiving signal, as shown in Figure 3.

Utilizing the basic thought that tensor detects is iteration.In the information S of transmitting terminal, except being Transmitting and Receiving End all known information for transmitting on pilot reference symbol, other information are to be detected, are all initialized as " 0 ".Will as the testing result of S, for form 2, be initialized as:

S ^ = 0 . . . 0 . . . 0 1 . . . 1 . . . 1 0 . . . 0 . . . 0 0 . . . 0 . . . 0 0 . . . 0 . . . 0 1 . . . 1 . . . 1 0 . . . 0 . . . 0 7 × U

For form, 1/1a/1b is initialized as:

S ^ = 0 . . . 0 . . . 0 0 . . . 0 . . . 0 p 0 1 . . . p 0 u . . . p 0 U p 1 1 . . . p 0 u . . . p 0 U p 2 1 . . . p 0 u . . . p 0 U 0 . . . 0 . . . 0 0 . . . 0 . . . 0 7 × U

Then, carry out interative computation n time:

for?iter=1:n

end

Operator wherein for Moose-Penrose generalized inverse, after n iteration for testing result. row respective user, every row 7 row, 7 symbols of the corresponding time slot of row, corresponding l=0,1,2,3,4,5,6 symbols.For form 2, after above-mentioned iteration being testing result, is the result of the quadrature spread factor that comprised time orientation for form 1/1a/1b, and only need separate quadrature can obtain testing result.Also obtained each user's channel estimating simultaneously row respective user, row respective antenna.

But, for said method, wherein need to calculate Moose-Penrose generalized inverse its exponent number equals number of users.For form 2, be 12 users to the maximum, need 12 rank plural number square formations to invert, this is very difficult in engineering; For form 1/1a/1b, exponent number is higher, under regular situation, can arrive 18 rank, and on be limited to 36 rank, this is obviously not attainable in engineering.

For above-mentioned problem one of at least in correlation technique, effective solution is not yet proposed at present.

Summary of the invention

The invention provides a kind of method and device of multiuser detection, large at least to solve the method amount of calculation of the multiuser detection in correlation technique, realize the problem that difficulty is large.

According to an aspect of the present invention, a kind of method of multiuser detection is provided, it comprises: at the receiving terminal of ascending control channel, by tensor operation to received signal Y detect, obtain the information of each user's transmission, wherein, by tensor operation, detect to received signal, the transmission information that obtains each user comprises following steps: the signal Y that Y obtains by the first default ordering rule to received signal antthe initialization matrix of the matrix that matrix, each user transmission information on a time slot forms S ^ = s 1 . . . s U Spread Spectrum Matrix W=[w with each user 1w u] carry out complex-conjugate transpose and multiply each other, obtain the channel estimate matrix of each user on each reception antenna H ^ = h 1 . . . h U , Wherein, s 1represent the transmission information of first user on this time slot, U represents user's number, w 1the frequency expansion sequence that represents first user, h 1represent the channel estimating of first user on each reception antenna; The signal Y that Y obtains by the second default ordering rule to received signal symmatrix, matrix W and matrix carry out complex-conjugate transpose and multiply each other, obtain the transmission information of each user on time slot.

Preferably, according to the form of the ascending control channel matrix that the transmission information on time slot forms to each user, carry out initialization, obtain matrix the form of corresponding ascending control channel will be 0 for transmitting the information initializing of the symbol of data on time slot.

Preferably, the form of ascending control channel comprises one of following: ascending control channel form 1/1a/1b, ascending control channel form 2/2a/2b.

Preferably, the signal Y that Y obtains by the first default ordering rule to received signal antthe initialization matrix of the matrix that matrix, each user transmission information on a time slot forms carry out complex-conjugate transpose with each user's Spread Spectrum Matrix W and multiply each other, obtain the channel estimate matrix of each user on each reception antenna comprise: matrix carry out respective column tensor operation with Spread Spectrum Matrix W; Signal Y antthe matrix of consequence of matrix and respective column tensor operation carries out complex-conjugate transpose and multiplies each other and add up, and obtains the channel estimate matrix of each user on each reception antenna

Preferably, receive the signal Y that signal Y obtains by the first default ordering rule antthe matrix of consequence of matrix and respective column tensor operation carries out complex-conjugate transpose and multiplies each other and add up, and obtains the channel estimate matrix of each user on each reception antenna comprise: signal Y anteach row of matrix are corresponding with each reception antenna, list the signal of a antenna reception is arranged according to the order of subcarrier, symbol, signal Y at a antthe a row of matrix carry out complex-conjugate transpose with every row of the matrix of consequence of respective column tensor operation and multiply each other and add up, and obtain the channel estimating of each user on a antenna; Repeat above-mentioned steps and obtain the channel estimate matrix of each user on each reception antenna wherein, A represents the number of antenna.

Preferably, the signal Y that Y obtains by the first default ordering rule to received signal antthe initialization matrix of the matrix that matrix, each user transmission information on a time slot forms carry out complex-conjugate transpose with each user's Spread Spectrum Matrix W and multiply each other, obtain the channel estimate matrix of each user on each reception antenna comprise: signal Y symmatrix and matrix W and matrix the matrix of consequence that respective column tensor multiplies each other carries out complex-conjugate transpose and multiplies each other and add up, and obtains the transmission information of each user on this time slot.

Preferably, receive the signal Y that signal Y obtains by the second default ordering rule symmatrix and matrix W and matrix the matrix of consequence that respective column tensor multiplies each other carries out complex-conjugate transpose and multiplies each other and add up, and obtains the transmission information of each user on this time slot and comprises: signal Y symeach row of matrix are corresponding with each symbol of time slot, list the reception signal on l symbol is arranged according to the order of antenna, subcarrier, signal Y at l symmatrix l row and matrix W and matrix every row of the matrix of consequence that tensor multiplies each other carry out complex-conjugate transpose and multiply each other and add up, and obtain the transmission information of each user on l symbol; Repeat above-mentioned steps and obtain the transmission information of each user on this time slot.

According to a further aspect in the invention, provide a kind of square law device of multiuser detection, it comprises: the first complex-conjugate transpose module that multiplies each other, and for the signal Y that Y obtains by the first default ordering rule to received signal antthe initialization matrix of the matrix that matrix, each user transmission information on a time slot forms S ^ = s 1 . . . s U Spread Spectrum Matrix W=[w with each user 1w u] carry out complex-conjugate transpose and multiply each other, obtain the channel estimate matrix of each user on each reception antenna H ^ = h 1 . . . h U , Wherein, s 1represent the transmission information of first user on this time slot, U represents user's number, w 1the frequency expansion sequence that represents first user, h 1represent the channel estimating of first user on each reception antenna; The second complex-conjugate transpose module that multiplies each other, for the signal Y that Y obtains by the second default ordering rule to received signal symmatrix, matrix W and matrix carry out complex-conjugate transpose and multiply each other, obtain the transmission information of each user on time slot.

Preferably, the first complex-conjugate transpose module that multiplies each other comprises: respective column tensor operation unit, and for to matrix carry out respective column tensor operation with Spread Spectrum Matrix W; Complex-conjugate transpose multiplies each other and the unit that adds up, for to signal Y antthe matrix of consequence of matrix and respective column tensor operation carries out complex-conjugate transpose and multiplies each other and add up, and obtains the channel estimate matrix of each user on each reception antenna

Preferably, the complex-conjugate transpose unit that multiplies each other, also for signal Y anteach row of matrix are corresponding with each reception antenna, list the signal of a antenna reception is arranged according to the order of subcarrier, symbol, signal Y at a antthe a row of matrix carry out complex-conjugate transpose with every row of the matrix of consequence of respective column tensor operation and multiply each other and add up, and obtain the channel estimating of each user on a antenna; Repeat above-mentioned steps and obtain the channel estimate matrix of each user on each reception antenna wherein, A represents the number of antenna.

Preferably, the second complex-conjugate transpose module that multiplies each other, also for signal Y symmatrix and matrix W and matrix the matrix of consequence that respective column tensor multiplies each other carries out complex-conjugate transpose and multiplies each other and add up, and obtains the transmission information of each user on this time slot.

Preferably, the second complex-conjugate transpose module that multiplies each other, also for signal Y symeach row of matrix are corresponding with each symbol of time slot, list the reception signal on l symbol is arranged according to the order of antenna, subcarrier, signal Y at l symmatrix l row and matrix W and matrix every row of the matrix of consequence that respective column tensor multiplies each other carry out complex-conjugate transpose and multiply each other and add up, and obtain the transmission information of each user on l symbol;

Repeat above-mentioned steps and obtain the transmission information of each user on this time slot.

In the present invention, first, the signal Y that Y obtains by the first default ordering rule to received signal ant, the matrix that forms of the transmission information of each user on a time slot initialization matrix carry out complex conjugate with each user's Spread Spectrum Matrix W and multiply each other, obtain the channel estimate matrix of each user on each reception antenna then, the signal Y that Y obtains by the second default ordering rule to received signal symmatrix, matrix W and matrix carry out complex conjugate and multiply each other, obtain the transmission information of each user on time slot, computing is converted to the computing that complex multiplication is sued for peace again, avoiding carrying out plural square formation inverts, thereby reduced amount of calculation, reduced the difficulty that the method realizes, improved the detection performance of the method.

Accompanying drawing explanation

Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and 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 structural representation of the reception signal Y of correlation technique;

Fig. 2 is the signal Y according to correlation technique antin receiving signal Y, extract the schematic diagram of mode;

Fig. 3 is the signal Y according to correlation technique symin receiving signal Y, extract the schematic diagram of mode;

Fig. 4 is according to the flow chart of the method for the multiuser detection of the embodiment of the present invention;

Fig. 5 is according to the structured flowchart of the device of the multiuser detection of the embodiment of the present invention; And

Fig. 6 is according to the multiply each other structured flowchart of module of the first complex conjugate of the embodiment of the present invention.

Embodiment

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

The present embodiment provides a kind of method of multiuser detection, and as shown in Figure 4, the method for this multiuser detection comprises that step S402 is to step S404.

Step S402: at the receiving terminal of ascending control channel, by tensor operation to received signal Y detect, obtain the information of each user's transmission, wherein, by tensor operation, detect to received signal, the transmission information that obtains each user comprises following steps: the signal Y that Y obtains by the first default ordering rule to received signal antthe initialization matrix of the matrix that matrix, each user transmission information on a time slot forms S ^ = s 1 . . . s U Spread Spectrum Matrix W=[w with each user 1w u] carry out complex-conjugate transpose and multiply each other, obtain the channel estimate matrix of each user on each reception antenna H ^ = h 1 . . . h U , Wherein, s 1represent the transmission information of first user on this time slot, U represents user's number, w 1the frequency expansion sequence that represents first user, h 1represent the channel estimating of first user on each reception antenna.

Step S404: the signal Y that Y obtains by the second default ordering rule to received signal symmatrix, matrix W and matrix carry out complex-conjugate transpose and multiply each other, obtain the transmission information of each user on time slot.

By above-mentioned steps, first, the signal Y that Y obtains by the first default ordering rule to received signal ant, the matrix that forms of the transmission information of each user on a time slot initialization matrix carry out complex-conjugate transpose with each user's Spread Spectrum Matrix W and multiply each other, obtain the channel estimate matrix of each user on each reception antenna then, the signal Y that Y obtains by the second default ordering rule to received signal symmatrix, matrix W and matrix carry out complex-conjugate transpose and multiply each other, obtain the transmission information of each user on time slot, computing is converted to the computing that complex multiplication is sued for peace again, avoiding carrying out plural square formation inverts, thereby reduced amount of calculation, reduced the difficulty that the method realizes, improved the detection performance of the method.

Preferably, in agreement TS36.211, the frequency expansion sequence of user on distinct symbols l is different, according to symbol l, increased cyclic shift fixing, definite and that user is irrelevant to reduce mutual interference, at receiving terminal, can do corresponding anti-processing to the multi-user's who receives mixed signal, for the ease of calculating, therefore here the frequency expansion sequence Direct Modeling between each symbol of user u l is identical w u.

Preferably, below example the complex-conjugate transpose phase multiplication between above-mentioned matrix is described, for example,

A=[a1?a2?a3]

B=[b1?b2?b3]

AB H = a 1 a 2 a 3 b 1 b 2 b 3 H

= a 1 a 2 a 3 b 1 * b 2 * b 3 * = a 1 · b 1 * + a 2 · b 2 * + a 3 · b 3 *

AB hthe complex-conjugate transpose that can Direct function description be matrix A and matrix B multiplies each other, and the complex conjugate that also can be described as matrix A and matrix B multiplies each other and adds up, be i.e. final step in above-mentioned formula by row is point-to-point.If matrix A and matrix B are multirow matrixes, AB hor the complex-conjugate transpose that can Direct function description be matrix A and matrix B multiplies each other, or certain row of matrix A and certain row of matrix B is point-to-point multiplies each other and add up.

Preferably, above-mentioned initialization matrix S ^ = s 1 . . . s U Can obtain by following steps, for example, according to the form of the ascending control channel matrix that the transmission information on time slot forms to each user, carry out initialization, obtain matrix the form of corresponding ascending control channel will be 0 for transmitting the information initializing of the symbol of data on time slot.In the situation that the form of the different ascending control channel of correspondence, will on this time slot, for the information initializing that transmits on the symbol of data, be 0.

Preferably, the form of above-mentioned ascending control channel can comprise one of following: ascending control channel form 1/1a/1b, ascending control channel form 2/2a/2b.For example, the in the situation that of ascending control channel form 1/1a/1b, each time slot internal symbol l=2,3 and l=4 for for transmitting the symbol of pilot reference symbol, symbol l=0,1,5,6 is for transmitting data, by the information initializing on symbol l=0,1,5,6, be 0, S ^ = 0 . . . 0 . . . 0 0 . . . 0 . . . 0 p 0 1 . . . p 0 u . . . p 0 U p 1 1 . . . p 0 u . . . p 0 U p 2 1 . . . p 0 u . . . p 0 U 0 . . . 0 . . . 0 0 . . . 0 . . . 0 7 × U ; The in the situation that of ascending control channel form 2/2a/2b, the symbol at each time slot internal symbol l=1 and l=5 for transmission pilot reference symbol, symbol l=0,2,3,4,6 symbols that are data symbol, by symbol l=0,2,3,4,6 are initialized as 0, S ^ = 0 . . . 0 . . . 0 1 . . . 1 . . . 1 0 . . . 0 . . . 0 0 . . . 0 . . . 0 0 . . . 0 . . . 0 1 . . . 1 . . . 1 0 . . . 0 . . . 0 7 × U , Wherein, U is user's number.

In order to reduce amount of calculation, in this preferred embodiment, the signal Y that Y obtains by the first default ordering rule to received signal antthe initialization matrix of the matrix that matrix, each user transmission information on a time slot forms carry out complex-conjugate transpose with each user's Spread Spectrum Matrix W and multiply each other, obtain the channel estimate matrix of each user on each reception antenna comprise: matrix carry out respective column tensor operation with Spread Spectrum Matrix W; Signal Y antthe matrix of consequence of matrix and respective column tensor operation carries out complex-conjugate transpose and multiplies each other and add up, and obtains the channel estimate matrix of each user on each reception antenna

In above preferred embodiment, matrix the matrix column obtaining after carrying out respective column tensor operation with Spread Spectrum Matrix W is corresponding with user, and U is listed as altogether, then, and by signal Y antthe matrix of consequence of matrix and above-mentioned respective column tensor operation carries out complex-conjugate transpose and multiplies each other and add up, and obtains the matrix that the channel estimating of each user on each reception antenna forms to obtain matrix calculating be converted into the computing that plural number is seized the opportunity summation again, avoid carrying out the calculating that plural square formation is inverted, thereby reduced amount of calculation.

Above-mentioned by signal Y antthe matrix of consequence of matrix and above-mentioned respective column tensor operation carries out complex-conjugate transpose and multiplies each other and add up, and obtains the matrix that the channel estimating of each user on each reception antenna forms step can realize in the following manner: signal Y anteach row of matrix are corresponding with each reception antenna, list the signal of a antenna reception is arranged according to the order of subcarrier, symbol, signal Y at a antthe a row of matrix carry out complex-conjugate transpose with every row of the matrix of consequence of respective column tensor operation and multiply each other and add up, and obtain the channel estimating of each user on a antenna; Repeat above-mentioned steps and obtain the channel estimate matrix of each user on each reception antenna wherein, A represents the number of antenna.

In above preferred embodiment, signal Y antobtain manner as shown in Figure 2, signal Y anteach row of matrix are corresponding with each reception antenna, and at a, list the signal of a antenna reception is arranged according to the order of subcarrier, symbol, then, signal Y antthe a row of matrix carry out complex conjugate with every row of the matrix of consequence of respective column tensor operation and multiply each other and add up, and obtain the channel estimating of each user on a antenna, through repeating above-mentioned steps, obtain the channel estimating of each user on each reception antenna,

In order to reduce further amount of calculation, in the present embodiment, the signal Y that Y obtains by the first default ordering rule to received signal antthe initialization matrix of the matrix that matrix, each user transmission information on a time slot forms carry out complex-conjugate transpose with each user's Spread Spectrum Matrix W and multiply each other, obtain the channel estimate matrix of each user on each reception antenna comprise: signal Y symmatrix and matrix W and matrix the matrix of consequence that respective column tensor multiplies each other carries out complex-conjugate transpose and multiplies each other and add up, and obtains the transmission information of each user on this time slot.

In the above-described embodiments, matrix W and matrix each row that carry out the matrix of consequence that respective column tensor multiplies each other are corresponding with user, and be total to U and be listed as, then, signal Y symthe matrix of consequence that matrix and above-mentioned respective column tensor multiply each other carries out complex-conjugate transpose and multiplies each other and add up, to obtain the transmission information of each user on this time slot, calculating is converted into plural number and seizes the opportunity the computing of summation again, avoid carrying out the calculating that plural square formation is inverted, thereby reduced further amount of calculation.

The signal Y that above-mentioned reception signal Y obtains by the second default ordering rule symmatrix and matrix W and matrix the matrix of consequence that tensor multiplies each other with carry out complex-conjugate transpose and multiply each other and add up, the step that obtains the transmission information of each user on this time slot can realize in the following manner: signal Y symeach row of matrix are corresponding with each symbol of time slot, list the reception signal on l symbol is arranged according to the order of antenna, subcarrier, signal Y at l symmatrix l row and matrix W and matrix every row of the matrix of consequence that tensor multiplies each other carry out complex-conjugate transpose and multiply each other and add up, and obtain the transmission information of each user on l symbol; Repeat above-mentioned steps and obtain the transmission information of each user on this time slot.

In above preferred embodiment, signal Y symobtain manner as shown in Figure 3, signal Y symeach row of matrix are corresponding with each symbol of time slot, and at l, list the reception signal on l symbol is arranged according to the order of antenna, subcarrier, then, signal Y symmatrix l row and matrix W and matrix every row of the matrix of consequence that tensor multiplies each other carry out complex-conjugate transpose and multiply each other and add up, and obtain the transmission information of each user on l symbol (being symbol l-1); Through repetition above-mentioned steps, obtain the transmission information of each user on this time slot, complete the multiuser detection at this time slot, through repeatedly repeating above-mentioned steps, can obtain each user's testing result information.

Preferably, can obtain each user's testing result information by following iterative manner:

for?iter=1:n

end

Preferably, the in the situation that of ascending control channel form 1/1a/1b, at each time slot internal symbol l=2,3 and the l=4 symbol that is transmission pilot reference symbol, because it has quadrature spread on time orientation, therefore, be equivalent to transmit on it orthogonal code, each user's that above-mentioned detection method obtains detection information is the result of the quadrature spread factor that comprised time orientation, and only need separate quadrature can obtain testing result.

The present embodiment provides a kind of device of multiuser detection, and as shown in Figure 5, the device of this multiuser detection comprises: the first complex-conjugate transpose module 502 that multiplies each other, and for the signal Y that Y obtains by the first default ordering rule to received signal antthe initialization matrix of the matrix that matrix, each user transmission information on a time slot forms S ^ = s 1 . . . s U Spread Spectrum Matrix W=[w with each user 1w u] carry out complex-conjugate transpose and multiply each other, obtain the channel estimate matrix of each user on each reception antenna H ^ = h 1 . . . h U , Wherein, s 1represent the transmission information of first user on this time slot, U represents user's number, w 1the frequency expansion sequence that represents first user, h 1represent the channel estimating of first user on each reception antenna; The second complex-conjugate transpose module 504 that multiplies each other, is connected to the first complex-conjugate transpose module 502 that multiplies each other, for the signal Y that Y obtains by the second default ordering rule to received signal symmatrix, matrix W and matrix carry out complex-conjugate transpose and multiply each other, obtain the transmission information of each user on time slot.

In the above-described embodiments, the first complex-conjugate transpose module 502 signal Y that Y obtains by the first default ordering rule to received signal that multiplies each other ant, the matrix that forms of the transmission information of each user on a time slot initialization matrix carry out complex-conjugate transpose with each user's Spread Spectrum Matrix W and multiply each other, obtain the channel estimate matrix of each user on each reception antenna then, the second complex-conjugate transpose module 504 signal Y that Y obtains by the second default ordering rule to received signal that multiplies each other symmatrix, matrix W and matrix carry out complex-conjugate transpose and multiply each other, obtain the transmission information of each user on time slot, computing is converted to the computing that complex multiplication is sued for peace again, avoiding carrying out plural square formation inverts, thereby reduced amount of calculation, reduced the difficulty that the method realizes, improved the detection performance of the method.

In order to reduce amount of calculation, in this preferred embodiment, as shown in Figure 6, above-mentioned the first complex-conjugate transpose module 502 that multiplies each other comprises: respective column tensor operation unit 5022, and for to matrix carry out respective column tensor operation with Spread Spectrum Matrix W; Complex-conjugate transpose multiplies each other and the unit 5024 that adds up, and is connected to respective column tensor operation unit 5022, for to signal Y antthe matrix of consequence of matrix and respective column tensor operation carries out complex-conjugate transpose and multiplies each other and add up, and obtains the channel estimate matrix of each user on each reception antenna

Above-mentioned complex-conjugate transpose multiplies each other and the unit 5024 that adds up, also for signal Y anteach row of matrix are corresponding with each reception antenna, list the signal of a antenna reception is arranged according to the order of subcarrier, symbol, signal Y at a antthe a row of matrix carry out complex-conjugate transpose with every row of the matrix of consequence of respective column tensor operation and multiply each other and add up, and obtain the channel estimating of each user on a antenna;

Repeat above-mentioned steps and obtain the channel estimate matrix of each user on each reception antenna wherein, A represents the number of antenna.

In order to reduce further amount of calculation, in the present embodiment, in this preferred embodiment, the second complex-conjugate transpose module 504 that multiplies each other, also for signal Y symmatrix and matrix W and matrix the matrix of consequence that respective column tensor multiplies each other carries out complex-conjugate transpose and multiplies each other and add up, and obtains the transmission information of each user on this time slot.

In obtaining the process of the transmission information of each user on this time slot, above-mentioned the second complex-conjugate transpose module 504 that multiplies each other, also for signal Y symeach row of matrix are corresponding with each symbol of time slot, list the reception signal on l symbol is arranged according to the order of antenna, subcarrier, signal Y at l symmatrix l row and matrix W and matrix every row of the matrix of consequence that respective column tensor multiplies each other carry out complex-conjugate transpose and multiply each other and add up, and obtain the transmission information of each user on l symbol; Repeat above-mentioned steps and obtain the transmission information of each user on this time slot.

Below in conjunction with embodiment, above-mentioned each preferred embodiment is described in detail.

In the present embodiment, take ascending control channel form 2 as example, the method for above-mentioned multiuser detection comprises the steps:

S1: to received signal Y again chronological order obtain Y antand Y sym.

S2: for user u, initialization s u=[0 10001 0] t.

S3: by s uthe w corresponding with it ucarrying out respective column tensor multiplied result is a column vector, is designated as sw u.

S4: by sw uwith Y anta row complex conjugate multiply each other and add up and obtain be the channel estimating of user u on antenna a, traversal antenna a=1,2 ..., A, obtains the channel estimating of user u on each antenna, obtains h u = h 1 u · · · h A u T .

S5: by w uwith h ucarrying out respective column tensor multiplied result is a column vector, is designated as wh u.

S6: by wh uwith Y syml+1(because column number since 1, and symbol number is since 0, so l+1 is listed as corresponding symbol l) row complex conjugate multiplies each other and adds up and obtain be the testing result of user u on symbol l, traversal symbol l=0,1 ..., 6 obtain the testing result of user u on each symbol, s u = s 0 u · · · s 6 u T .

S7: by step S3 to S6 iterative computation 4 times, last result s u = s 0 u · · · s 6 u T Be the testing result of u user on a time slot.

S8: to all user u repeating step S2 ~ S7, obtain all users' testing result.

As can be seen from the above description, the present invention has realized following technique effect: the signal Y that Y obtains by the first default ordering rule to received signal ant, the matrix that forms of the transmission information of each user on a time slot initialization matrix carry out complex conjugate with each user's Spread Spectrum Matrix W and multiply each other, obtain the channel estimate matrix of each user on each reception antenna then, the signal Y that Y obtains by the second default ordering rule to received signal symmatrix, matrix W and matrix carry out complex conjugate and multiply each other, obtain the transmission information of each user on time slot, computing is converted to the computing that complex multiplication is sued for peace again, avoiding carrying out plural square formation inverts, thereby reduced amount of calculation, reduced the difficulty that the method realizes, improved the detection performance of the method.

Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, 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, can carry out shown or described step with the order being different from herein, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.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 a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (12)

1. a method for multiuser detection, is characterized in that, comprising:
At the receiving terminal of ascending control channel, by tensor operation to received signal Y detect, obtain the information of each user transmission, wherein, by tensor operation, detect to received signal, the transmission information that obtains each user comprises following steps:
The signal Y that described reception signal Y is obtained by the first default ordering rule antthe initialization matrix of the matrix that matrix, described each user transmission information on a time slot forms S ^ = s 1 . . . s U Spread Spectrum Matrix W=[w with described each user 1w u] carry out complex-conjugate transpose and multiply each other, obtain the channel estimate matrix of described each user on each reception antenna H ^ = h 1 . . . h U , Wherein, described s 1represent the transmission information of first user on this time slot, described U represents user's number, described w 1the frequency expansion sequence that represents described first user, described h 1represent the channel estimating of described first user on described each reception antenna;
The signal Y that described reception signal Y is obtained by the second default ordering rule symmatrix, described matrix W and described matrix carry out complex-conjugate transpose and multiply each other, obtain the transmission information of described each user on described time slot.
2. method according to claim 1, is characterized in that, according to the form of the described ascending control channel matrix that the transmission information on described time slot forms to described each user, carries out initialization, obtains described matrix the form of corresponding described ascending control channel will be 0 for transmitting the information initializing of the symbol of data on described time slot.
3. method according to claim 2, is characterized in that, it is one of following that the form of described ascending control channel comprises: ascending control channel form 1/1a/1b, ascending control channel form 2/2a/2b.
4. according to the method in any one of claims 1 to 3, it is characterized in that the signal Y that described reception signal Y is obtained by the first default ordering rule antthe initialization matrix of the matrix that matrix, described each user transmission information on a time slot forms carry out complex-conjugate transpose with described each user's Spread Spectrum Matrix W and multiply each other, obtain the channel estimate matrix of described each user on each reception antenna comprise:
Described matrix carry out respective column tensor operation with described Spread Spectrum Matrix W;
Described signal Y antthe matrix of consequence of matrix and described respective column tensor operation carries out complex-conjugate transpose and multiplies each other and add up, and obtains the channel estimate matrix of described each user on each reception antenna
5. method according to claim 4, is characterized in that, the signal Y that described reception signal Y obtains by the first default ordering rule antthe matrix of consequence of matrix and described respective column tensor operation carries out complex-conjugate transpose and multiplies each other and add up, and obtains the channel estimate matrix of described each user on each reception antenna comprise:
Described signal Y anteach row of matrix are corresponding with each reception antenna, list the signal of a antenna reception is arranged according to the order of subcarrier, symbol, described signal Y at a antthe a row of matrix carry out complex-conjugate transpose with every row of the matrix of consequence of described respective column tensor operation and multiply each other and add up, and obtain the channel estimating of described each user on a antenna;
Repeat above-mentioned steps and obtain the channel estimate matrix of described each user on each reception antenna wherein, described A represents the number of antenna.
6. according to the method in any one of claims 1 to 3, it is characterized in that the signal Y that described reception signal Y is obtained by the first default ordering rule antthe initialization matrix of the matrix that matrix, described each user transmission information on a time slot forms carry out complex-conjugate transpose with described each user's Spread Spectrum Matrix W and multiply each other, obtain the channel estimate matrix of described each user on each reception antenna comprise:
Described signal Y symmatrix and described matrix W and described matrix the matrix of consequence that respective column tensor multiplies each other carries out complex-conjugate transpose and multiplies each other and add up, and obtains the transmission information of described each user on this time slot.
7. method according to claim 6, is characterized in that, the signal Y that described reception signal Y obtains by the second default ordering rule symmatrix and described matrix W and described matrix the matrix of consequence that respective column tensor multiplies each other carries out complex-conjugate transpose and multiplies each other and add up, and obtains the transmission information of described each user on this time slot and comprises:
Described signal Y symeach row of matrix are corresponding with each symbol of described time slot, list the reception signal on l symbol is arranged according to the order of antenna, subcarrier, described signal Y at l symmatrix l row and described matrix W and described matrix every row of the matrix of consequence that tensor multiplies each other carry out complex-conjugate transpose and multiply each other and add up, and obtain the transmission information of described each user on described l symbol;
Repeat above-mentioned steps and obtain the transmission information of described each user on this time slot.
8. a device for multiuser detection, is characterized in that, comprising:
The first complex-conjugate transpose module that multiplies each other, for the signal Y that described reception signal Y is obtained by the first default ordering rule antthe initialization matrix of the matrix that matrix, described each user transmission information on a time slot forms S ^ = s 1 . . . s U Spread Spectrum Matrix W=[w with described each user 1w u] carry out complex-conjugate transpose and multiply each other, obtain the channel estimate matrix of described each user on each reception antenna H ^ = h 1 . . . h U , Wherein, described s 1represent the transmission information of first user on this time slot, described U represents user's number, described w 1the frequency expansion sequence that represents described first user, described h 1represent the channel estimating of described first user on described each reception antenna;
The second complex-conjugate transpose module that multiplies each other, for the signal Y that described reception signal Y is obtained by the second default ordering rule symmatrix, described matrix W and described matrix carry out complex-conjugate transpose and multiply each other, obtain the transmission information of described each user on described time slot.
9. device according to claim 8, is characterized in that, described the first complex-conjugate transpose module that multiplies each other comprises:
Respective column tensor operation unit, for to described matrix carry out respective column tensor operation with described Spread Spectrum Matrix W;
Complex-conjugate transpose multiplies each other and the unit that adds up, for to described signal Y antthe matrix of consequence of matrix and described respective column tensor operation carries out complex-conjugate transpose and multiplies each other and add up, and obtains the channel estimate matrix of described each user on each reception antenna
10. device according to claim 9, is characterized in that, the described complex-conjugate transpose unit that multiplies each other, also for described signal Y anteach row of matrix are corresponding with each reception antenna, list the signal of a antenna reception is arranged according to the order of subcarrier, symbol, described signal Y at a antthe a row of matrix carry out complex-conjugate transpose with every row of the matrix of consequence of described respective column tensor operation and multiply each other and add up, and obtain the channel estimating of described each user on a antenna;
Repeat above-mentioned steps and obtain the channel estimate matrix of described each user on each reception antenna wherein, described A represents the number of antenna.
11. devices according to claim 8, is characterized in that, described the second complex-conjugate transpose module that multiplies each other, also for described signal Y symmatrix and described matrix W and described matrix the matrix of consequence that respective column tensor multiplies each other carries out complex-conjugate transpose and multiplies each other and add up, and obtains the transmission information of described each user on this time slot.
12. devices according to claim 11, is characterized in that, described the second complex-conjugate transpose module that multiplies each other, also for described signal Y symeach row of matrix are corresponding with each symbol of described time slot, list the reception signal on l symbol is arranged according to the order of antenna, subcarrier, described signal Y at l symmatrix l row and described matrix W and described matrix every row of the matrix of consequence that respective column tensor multiplies each other carry out complex-conjugate transpose and multiply each other and add up, and obtain the transmission information of described each user on described l symbol;
Repeat above-mentioned steps and obtain the transmission information of described each user on this time slot.
CN201210227420.4A 2012-07-03 2012-07-03 The method and device of multiuser detection CN103532608B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210227420.4A CN103532608B (en) 2012-07-03 2012-07-03 The method and device of multiuser detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210227420.4A CN103532608B (en) 2012-07-03 2012-07-03 The method and device of multiuser detection

Publications (2)

Publication Number Publication Date
CN103532608A true CN103532608A (en) 2014-01-22
CN103532608B CN103532608B (en) 2018-01-19

Family

ID=49934335

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210227420.4A CN103532608B (en) 2012-07-03 2012-07-03 The method and device of multiuser detection

Country Status (1)

Country Link
CN (1) CN103532608B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104601498A (en) * 2014-08-22 2015-05-06 北京邮电大学 Tensor model based channel estimation method and device
CN106059968A (en) * 2016-05-27 2016-10-26 重庆邮电大学 MUSA system multistage portion parallel interference elimination multi-user detection method
CN107682124A (en) * 2017-10-23 2018-02-09 哈尔滨工业大学 The elder generation of multiple users share access technology up-link and after go here and there multi-user test method
CN108199751A (en) * 2017-12-29 2018-06-22 哈尔滨工程大学 Waveform generation method and device based on tensor model under a kind of mimo system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070058701A1 (en) * 2003-08-05 2007-03-15 Da Tang Mobile Communications Equipment Co., Ltd. Method for detecting the orthogonal code cdma signal
CN101610141A (en) * 2008-06-18 2009-12-23 中兴通讯股份有限公司 The associated detecting method of multi-antenna multi-user data and processing unit thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070058701A1 (en) * 2003-08-05 2007-03-15 Da Tang Mobile Communications Equipment Co., Ltd. Method for detecting the orthogonal code cdma signal
CN101610141A (en) * 2008-06-18 2009-12-23 中兴通讯股份有限公司 The associated detecting method of multi-antenna multi-user data and processing unit thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104601498A (en) * 2014-08-22 2015-05-06 北京邮电大学 Tensor model based channel estimation method and device
CN104601498B (en) * 2014-08-22 2017-09-26 北京邮电大学 A kind of channel estimation methods and device based on tensor model
CN106059968A (en) * 2016-05-27 2016-10-26 重庆邮电大学 MUSA system multistage portion parallel interference elimination multi-user detection method
CN106059968B (en) * 2016-05-27 2019-01-15 重庆邮电大学 Multi-user test method is eliminated in the interference of MUSA system multistage part parallel
CN107682124A (en) * 2017-10-23 2018-02-09 哈尔滨工业大学 The elder generation of multiple users share access technology up-link and after go here and there multi-user test method
CN108199751A (en) * 2017-12-29 2018-06-22 哈尔滨工程大学 Waveform generation method and device based on tensor model under a kind of mimo system
CN108199751B (en) * 2017-12-29 2020-05-19 哈尔滨工程大学 Tensor model-based waveform generation method and device in MIMO system

Also Published As

Publication number Publication date
CN103532608B (en) 2018-01-19

Similar Documents

Publication Publication Date Title
US9843466B2 (en) Method and apparatus for generating an uplink reference signal sequence in a wireless communication system
US9825743B2 (en) Method and apparatus for transmitting uplink signal in wireless communication system
US9942889B2 (en) Method and apparatus for transmitting a reference signal in a multi-antenna system
US9717076B2 (en) Method and apparatus for transmitting uplink signal in wireless communication system
RU2548028C1 (en) Method and apparatus for resource mapping and code division multiplexing
JP6088592B2 (en) Application of sequence hopping and orthogonal covering codes for uplink reference signals
US9438326B2 (en) Method and apparatus for transmitting reference signal
RU2538760C2 (en) Radio communication method, basic station and user terminal
EP2923457B1 (en) Systems and methods for open-loop spatial multiplexing schemes for radio access virtualization
RU2551823C2 (en) Method and system for multiplexing acknowledgement signals and sounding reference signals
US10320544B2 (en) Method and apparatus for transmitting a reference signal in a multi-antenna system
EP3148145B1 (en) Resource allocation method and device
US10469222B2 (en) Method and MTC device for transmitting DMRS for uplink data demodulation
EP2306659B1 (en) Method for allocating phich in a system using su-mimo with multiple codewords in uplink
US9887858B2 (en) Method and apparatus for using demodulation reference signal multiplexing in wireless communication
RU2532722C2 (en) Method and apparatus for transmitting uplink control signals and bearing uplink demodulation reference signal
RU2527930C2 (en) Precoding method and apparatus based on mixed multiplexing demodulation reference signals
US8295325B2 (en) Signature sequences and methods for time-frequency selective channel
JP5976534B2 (en) Method and apparatus for generating dedicated reference signal
CN101682920B (en) User device, base station device, and method
CN102246446B (en) Method and apparatus for signal transmission in wireless communication system
US8351532B2 (en) Iterative interference cancellation
CN101330321B (en) Method and device for assigning reference signal sequences in mobile communications system
EP1942596B1 (en) Method and apparatus for transmitting and receiving control information to randomize inter-cell interference in a mobile communication system
EP2448156B1 (en) Wireless base station device, mobile station device, and wireless communication method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C41 Transfer of patent application or patent right or utility model
TA01 Transfer of patent application right

Effective date of registration: 20151028

Address after: 518057 Nanshan District science and technology, Guangdong Province, South Road, No. 55, No.

Applicant after: ZTE Corporation

Applicant after: SHENZHEN ZTE MICROELECTRONICS TECHNOLOGY CO., LTD.

Address before: 518057 Nanshan District science and technology, Guangdong Province, South Road, No. 55, No.

Applicant before: ZTE Corporation

GR01 Patent grant
GR01 Patent grant