CN101005339A - Data multiple channel sending method and device of multiple carrier system - Google Patents

Abstract

First, the method ensures pairwise grouping scheme of multiple sub band resources belonged to same user on same antenna. Next, the method carries out orthogonal transform (OT) for data symbols on same time frequency unit in two sub bands of each group, and then sends the transform. The invention also discloses device for realizing sending data through multiple channels in multicarrier system. The device includes following units: sub band map unit in use for mapping data symbols belonged to same user to multiple sub bands assigned for the user, and informing the utilized information of sub band to the grouping unit; the grouping unit in use for carrying out pairwise grouping multiple sub band resources belonged to same user on same antenna, and informing grouping scheme to OT unit; the OT unit is connected the map unit, and its function is described above.

Description

A kind of data multiple channel sending method of multicarrier system and device

Technical field

The present invention relates to communication technical field, relate in particular to a kind of data multiple channel sending method of multicarrier system.

Background technology

In multi-carrier communications systems, the resource that scheduling of resource time-division provisioned user is carried out in the base station is unit with the subband, subband is a time-frequency two-dimensional, and a subband is the subcarrier that takies partial continuous on frequency domain, takies an integer continuous orthogonal frequency division multiplex OFDM symbol in time.The size of subband is to decide according to concrete system design.See also Fig. 1, it is a multi-carrier communications systems sub band resources schematic diagram.

The minimum lattice of among the figure each are called a time frequency unit, a subband is to be made of many time frequency unit, the usefulness of time frequency unit position in subband (k, t) expression, k, t represent respectively is on k subcarrier and t OFDM symbol of time frequency unit in this subband.Each user is the channel quality that measures by public guide frequency at first, then channel quality indication (CQI) information CQI is fed back to the base station, scheduling of resource is carried out to each user of feedback CQI in the base station, resource by distributing to the user after the scheduling is exactly some subbands, these subbands can be continuous, or discrete.For example subband 1,2 is given same user, or subband 1,3 gives same user, or subband 1,2,4 is given same user.

At top situation, prior art provides a kind of link adaptation scheme, adaptive coding and modulating AMC mode that promptly each subband is unified and the automatic repeat requests HARQ process of traditional mixing.Suppose by distributing to two subbands of user after the scheduling, be designated as subband 1 and 2 respectively, the base station averages the CQI of the subband 1,2 of this user feedback, selects a modulation coding mode as the unified code modulation mode of all subbands of user according to average CQI then.Send to the user's data piece and at first carry out the cyclic redundancy check (CRC) operation, carry out chnnel coding and modulation through the data block behind the CRC respectively according to the modulation coding mode that average CQI selects, then the data after the modulation are divided equally on two subbands, be to adopt identical code modulation mode on each subband, and the data bit number of transmission equate.

Correspondingly, user terminal UE carries out the inverse operation of transmitting terminal, i.e. demodulation, channel decoding and CRC check to the data that receive on subband 1 and the subband 2.If CRC check is correct, represent correct reception with regard to feeding back ACK to the base station, otherwise feedback NACK, the wrong data that receive of expression need retransmit data block; In the HARQ retransmission processes, adopt and identical subband and corresponding modulation coding mode during first the transmission, the mapping scheme of data symbol on subband is also and identical during transmission for the first time simultaneously.

No matter be first the transmission or repeating transmission, the base station all is will divide equally on several subbands through the data after the coded modulation directly to send, so the data symbol difference of carrying on the different sub-band, and in other words, same data symbol is only through a channel.But if certain subband corresponding channel quality is poor especially, the data symbol on this subband often can't be in the correct demodulation of user terminal so, and then causes number of retransmissions to increase, and has reduced the throughput of system.

Summary of the invention

The problem to be solved in the present invention provides a kind of data multiple channel sending method and device of multicarrier system, transmits the technical problem that causes the user terminal number of retransmissions to increase easily by single channel to solve existing identical data symbol.

For solving the problems of the technologies described above, the objective of the invention is to be achieved through the following technical solutions: a kind of data multiple channel sending method of multicarrier system, each subband that belongs to same user on the same antenna adopts unified coded system, determines to belong on the same antenna grouping scheme in twos of a plurality of sub band resources of same user; Data symbol on the identical time frequency unit in two subbands in every group is carried out sending after the orthogonal transform.

Preferably, when sending for the first time, described a plurality of sub band resources are carried out random packet in twos.

Preferably, when sending for the first time, described a plurality of sub band resources are carried out the grouping in twos of adjacent sub-bands.

When even number retransmits, described a plurality of sub band resources are pairwise grouping again, this grouping scheme is different from former grouping scheme.

If belonging to same user's number of sub-bands on the same antenna is odd number, then in the packet mode when last secondary data sends, a subband that has neither part nor lot in grouping participates in this grouping again.

When odd number retransmitted, the grouping scheme when last secondary data is sent was as the grouping scheme of this re-transmission.Data symbol in two subbands in every group on the identical time frequency unit carries out before the orthogonal transform, the data symbol that sent in first subband last time is got conjugation be mapped on the same group second subband; The data symbol that sent in second subband last time is got negative conjugation be mapped on the same group first subband.

Preferably, the data symbol on the identical time frequency unit in two subbands in described every group is constituted column vector; Orthogonal matrix or unitary matrice and described column vector are multiplied each other, carry out orthogonal transform.

If belonging to same user's sub band resources number on the same antenna is odd number, the subband data symbol that then has neither part nor lot in grouping directly sends without orthogonal transform.

Adopt in the multiaerial system of Unified coding mode at each antenna, during data retransmission, data symbol in two subbands in every group on the identical time frequency unit carries out before the orthogonal transform, and one group of subband at least one antenna and one group of subband on other antennas are carried out data replacement.

During data retransmission, carry out the data replacement of random fashion or the data replacement of endless form between the subband group of different antennae.During each data retransmission, the data replacement scheme between the subband group of different antennae is all different.Each antenna adopts identical grouping scheme.

Described antenna is physical antenna or virtual-antenna.

A kind of data multiple channel dispensing device of multicarrier system comprises: the subband map unit is used for and will belongs to same user's data sign map to being a plurality of subbands of its distribution, and the sub-band information that uses is informed grouped element; Grouped element, a plurality of sub band resources that are used for belonging to same user on the same antenna are pairwise grouping, and the grouping scheme is informed orthogonal transform unit; Be connected in the orthogonal transform unit after the subband map unit, be used for the data symbol on two identical time frequency unit of subband in every group is carried out orthogonal transform.

Preferably, also comprise the transmission record cell, be used to write down the number of times that same data send.

Described grouped element is provided with the grouping scheme according to the number of times that data send.

Preferably, also comprise being connected in subband map unit conjugation correlation unit before, be used for got conjugation at the data symbol that first subband sends last time; The data symbol that sent last time in second subband is got negative conjugation.When odd number time data retransmission, before data enter the subband map unit, call described conjugation correlation unit; During even number time data retransmission, never call described conjugation correlation unit.

Adopt in the multiaerial system of Unified coding mode at each antenna, described subband map unit also comprises the data replacement subelement, is used for one group of subband at least one antenna and one group of subband on other antennas are carried out data replacement.

Above technical scheme in the present invention, at first determines to belong on the same antenna grouping scheme in twos of a plurality of sub band resources of same user as can be seen; Then the data symbol on the identical time frequency unit of two subbands in every group is carried out sending after the orthogonal transform.Because the data symbol on the identical time frequency unit in two subbands has been carried out orthogonal transform, make that same data symbol can be through two channels, these two channels are positioned on the subcarrier of different sub-band, therefore user terminal can obtain certain frequency diversity gain, and then improved the demodulation performance of data symbol, reduce number of retransmissions, improved system throughput on the whole.

Further, make mistakes, when user terminal needs the base station data retransmission, the data symbol that sends in first subband is for the first time got conjugation be mapped on the same group second subband first the transmission; The first data symbol that sends in second subband is got negative conjugation and is mapped on the same group first subband, then the data symbol on the identical time frequency unit in every group of two subbands is carried out orthogonal transform, and sends.Since be used for joint-detection twice signal the equivalent channel of process be quadrature, therefore can obtain the result that high specific merges under two channels.

Description of drawings

Fig. 1 is the sub band resources schematic diagram of multi-carrier communications systems;

Fig. 2 is the first embodiment flow chart of the data multiple channel sending method of a single aerial system;

Fig. 3 is the data processing schematic diagram of a single aerial system inside of base station;

Fig. 4 is the second embodiment flow chart of the data multiple channel sending method of a single aerial system;

Fig. 5 is the resource schematic diagram that to belong to same user's running time-frequency resource be six subbands;

Fig. 6 is the embodiment flow chart of the data multiple channel sending method of multiaerial system;

Fig. 7 is the sub band resources schematic diagram under the multiaerial system;

Fig. 8 is the data multiple channel dispensing device embodiment schematic diagram of multicarrier system.

Embodiment

Core concept of the present invention is: by the data symbol on two identical time frequency unit of different sub-band is carried out sending after the orthogonal transform, make same data symbol pass through two different channels, thereby obtain frequency diversity gain.

For those skilled in the art more are expressly understood the present invention program, introduce the link circuit self-adapting process of multicarrier system below in detail: user terminal UE at first measures the pilot frequency information in the down public guide frequency channel, obtains channel quality; Each UE ceases to the base station feedback channel quality indicator (CQI) then; The base station is according to each user CQI information of receiving, and with reference to the demand of their downlink transfer business, carries out the running time-frequency resource scheduling, and the modulation coding mode on the distributing to dispatched users resource is selected; The base station is handed down to the user with resource allocation information and modulation coding mode by descending shared control signal channel, and the base station is according to the resource and the transmission means of scheduling result indication simultaneously, and transmission corresponding downstream data are given the user who is dispatched.

UE is the demodulation descending shared control signal channel at first, if discovery is the indication information to oneself, then by the respective transmissions form downlink data is carried out demodulation in the relevant position according to the requirement of wherein downlink resource indication; If correct to the data demodulation, then UE is to base station feedback confirmation ACK, and simultaneously, UE measures and to the new CQI information of base station feedback, begins next link circuit self-adapting process; If the demodulation mistake, then UE requires the base station that data are retransmitted to base station feedback unacknowledged information NACK, till UE receives correct or reaches the number of retransmissions of maximum.

By link circuit self-adapting process recited above as can be known, it comprises adaptive coding and modulating AMC and mixes two processes of automatic repeat requests HARQ.The principle of AMC is according to adaptive change modulation of the channel condition of reality and coded system.The principle of HARQ is that receiving terminal carries out demodulation to the data that receive, if demodulation is correct, just sends to the confirmation ACK in base station, and expression receives correct; If the demodulation mistake just sends a nack message, expression demodulation mistake needs the base station to retransmit, and merges then, utilizes re-transmission to obtain gain and improves performance.Usually the use that will above-mentioned two schemes combines, AMC provides rough data rate selection, and HARQ can carry out meticulousr adjustment to data speed according to the data channel condition.

AMC and HARQ scheme based on above-mentioned multicarrier system the invention discloses a kind of data multiple channel sending method, and a plurality of subbands that belong to same user on the same antenna adopt unified coding (or coded modulation) mode.At first determine to belong on the same antenna grouping scheme in twos of a plurality of sub band resources of same user; Then the data symbol on the time frequency unit of the same position of two subbands in every group is carried out sending after the orthogonal transform.Because when first transmission and re-transmission, different packet modes is arranged, and odd number time when retransmitting before the data symbol on every group of two subbands carries out orthogonal transform, also will carry out the conjugation related replacement, so following examples all will be transmitted and retransmit two processes for the first time and combine and be described.And data multiple channel sending method disclosed by the invention both had been applicable to a single aerial system, also was applicable to multiaerial system.

Please referring to Fig. 2, it is the data multiple channel transmission method first embodiment flow chart of a single aerial system.

Step 210: the base station is according to the channel quality indication (CQI) information of user terminal feedback and the demand of downlink transfer business, for this user distributes time frequency unit: subband 1 and subband 2, and the modulation coding mode on definite described subband.

Please in conjunction with consulting Fig. 3, it is a single aerial system internal data processing schematic diagram of Unified coding modulation system.The base station is according to the channel quality information of family terminal feedback and the demand of downlink transfer business, the running time-frequency resource that distributes for this user is subband 1 and subband 2, selects a modulation coding mode as the unified code modulation mode of all subbands of this user according to the CQI mean value on subband 1 and the subband 2 simultaneously.Data block at first by cyclic redundancy check (CRC), is carried out chnnel coding and modulation then, divides equally on two subbands through the data symbol after the ovennodulation.Behind the serial to parallel conversion, a part of data allocations is designated as X in subband 1 ₁, another part data allocations is designated as X in subband 2 ₂The X here ₁, X ₂Be meant a set of all data symbols in each subband, each time frequency unit in the subband all has a data symbol, x _{1, k, t}Be (k, the t) data symbol on the time frequency unit, x in the subband 1 _{2, k, t}Be (k, t) data symbol on the time frequency unit in the subband 2.Wherein, k represents on k the subcarrier of described time frequency unit in this subband; T represents on t the OFDM symbol of described time frequency unit in this subband.

Step 220: subband 1 with after data symbol on the subband 2 identical time frequency unit carries out orthogonal transform, is sent to user terminal.

Distribute to the sub band resources of user's use and have only two, therefore they are defaulted as one group.(k, t) data symbol on the individual time frequency unit carries out orthogonal transform with in subband 1 and the subband 2.By the data symbol on two identical time frequency unit of subband is constituted column vector earlier, multiply each other with it by an orthogonal matrix or unitary matrice then, can reach above-mentioned orthogonal transform purpose.If a solid yardage battle array Q satisfies QQ ^T=Q ^TQ=I claims that then Q is an orthogonal matrix, the matrix transpose operation of T representing matrix wherein, and what I represented is unit matrix.If a compound battle array V satisfies VV ^H=V ^HV=I claims that then V is a unitary matrice, and what wherein H represented is its conjugate transpose operation of matrix, and what I represented is unit matrix.For example:

$Q=\left(\begin{array}{cc}\cos \mathrm{\θ}& \sin \mathrm{\θ}\\ -\sin \mathrm{\θ}& \cos \mathrm{\θ}\end{array}\right)---\left(1\right)$

$v=\left(\begin{array}{cc}A& -\sqrt{1-A^2}\exp (-\mathrm{j\φ})\\ \sqrt{1-A^2}\exp \left(\mathrm{j\φ}\right)& A\end{array}\right)---\left(2\right)$

Be that example describes in detail with orthogonal matrix Q below, promptly the data symbol on the identical time frequency unit in subband 1 and the subband 2 carried out following operation

$\left(\begin{array}{c}{\tilde{x}}_{1,k,t}\\ {\tilde{x}}_{2,k,t}\end{array}\right)=\left(\begin{array}{cc}\cos \mathrm{\θ}& \sin \mathrm{\θ}\\ -\sin \mathrm{\θ}& \cos \mathrm{\θ}\end{array}\right)\left(\begin{array}{c}{x}_{1,k,t}\\ x_{2,k,t}\end{array}\right)---\left(3\right)$

The data symbol after the process orthogonal transform

Respectively from subband 1 and 2 (k t) sends on the individual time frequency unit.By above-mentioned conversion as can be known, through after the conversion, data symbol x _{1, k, t}, x _{2, k, t}(k, t) individual time frequency unit is because therefore the channel response difference of different time frequency unit can obtain certain frequency diversity gain in transmission course all to have passed through the on two subbands simultaneously.Because each symbol has all passed through two different subcarriers, therefore reduced error probability to a certain extent, reduce number of retransmissions, and then can improve the throughput of system.

Above-mentioned steps 210 and 220 is first transmission courses of down link data, and after this user terminal carries out demodulation to the data that receive, if demodulation is correct, just sends to the confirmation ACK in base station, and expression receives correct; If the demodulation mistake just sends a nack message, expression demodulation mistake needs the base station to retransmit.

Step 230: user terminal informs to the base station feedback confirmation whether the base station needs data retransmission.If enter step 240; Otherwise enter step 260: finish.

Step 240: be mapped to the subband 2 of this group conjugation will the first data symbol that sends be got in the base station in subband 1 after, the data symbol that sends in the subband 2 got the subband 1 that is mapped to this group after the negative conjugation.

In retransmission processes, can adopt with first and send identical subband 1,2, and modulation coding mode is also identical; Perhaps adopt two different subbands 3,4, but require the sub-band channel response between subband 3,4 and the subband 1,2 to be more or less the same.Described channel is corresponding to be more or less the same, and promptly the channel response of subband has strong correlation, and strong as the channel response correlation of the channel response of subband 3 and subband 1, the channel response correlation of the channel response of subband 4 and subband 2 is strong.This sentence retransmit and first transmission to take identical subband be that example describes.

Data retransmission carries out processing procedures such as CRC, chnnel coding, modulation with first the same, and unique difference is to modulate the mapping mode of back data symbol: the data symbol X of first transmission in subband 1 ₁Get in the subband 2 that conjugation is mapped to this group, the data symbol X that sends in the subband 2 ₂Getting negative conjugation is mapped in the subband 1 of this group.Through after such mapping, the data symbol that sends in subband 1 and the subband 2 when retransmitting is respectively-X ₂ ^*, X ₁ ^*, then (k, t) data symbol on the individual time frequency unit is-x in the subband 1 _{2, k, t} ^*, (k, t) data symbol on the individual time frequency unit is x in the subband 2 _{1, k, t} ^*

Step 250: after the data symbol on the identical time frequency unit in subband 1 and the subband 2 carried out orthogonal transform, send to user terminal.After the mapping of the conjugation of step 240, the data symbol on the identical time frequency unit in two subbands is carried out sending after as the formula (1) the orthogonal transform.

For clearer description process of the present invention, and the beneficial effect that discloses the present invention program, the signal processing of receiving terminal also is described in detail.

Be without loss of generality herein so that (k, t) merging of data symbol describes on the individual time frequency unit in two subbands.Suppose subband 1, (k, t) channel response of time frequency unit is respectively h in the subband 2 ₁, h ₂, first received signal is respectively r ₁, r ₂, n ₁, n ₂Be to receive noise.Promptly

r ₁＝h ₁cosθx _1，k，t+h ₁sinθx _{2，k，t，1}+n ₁ (4)

r ₂＝-h ₂sinθx _1，k，t+h ₂cosθx _2，k，t+n ₂

Owing to the data symbol on the identical time frequency unit in subband 1 and the subband 2 has been carried out the orthogonal transform shown in the formula (3), has made in formula (4) data symbol x _{1, k, t}, x _{2, k, t}Two channels have been passed through respectively.Because above-mentioned two channels are positioned on the subcarrier of different sub-band, therefore channel response can be thought separate, after handling like this, each data symbol can obtain frequency diversity gain, and the probability of first error detection will be lower than the situation that two signals are directly sent.

Received signal is r when supposing to retransmit ₃, r ₄, that is:

$r_3=-h_1\cos \mathrm{\θ}{x}_{2,k,t}^{*}+h_1\sin \mathrm{\θ}{x}_{1,k,t}^{*}+n_3---\left(5\right)$

$r_4=h_2\sin \mathrm{\θ}{x}_{2,k,t}^{*}+h_2\cos \mathrm{\θ}{x}_{1,k,t}^{*}+n_4$

(2) and (3) are carried out joint-detection:

${\hat{x}}_{1,k,t}=\left(\right|h_1{|}^2+\left|h_2{|}^2\right)x_{1,k,t}+{\tilde{n}}_1---\left(6\right)$

${\hat{x}}_{2,k,t}=\left(\right|h_1{|}^2+\left|h_2{|}^2\right)x_{2,k,t}+{\tilde{n}}_2$

This shows, during re-transmission the data symbol on every group of two subbands has been carried out the conjugation related replacement, make that two equivalent channel of the data symbol process of twice reception are different before and after the user terminal, so user terminal can carry out joint-detection to the received signal of first transmission and re-transmission.In addition, owing to the data symbol on every group of interior two subbands has not only carried out the conjugation related replacement, also before transmission, carried out orthogonal transform, therefore be used for joint-detection twice signal the equivalent channel of process be quadrature, thereby can obtain the result that high specific merges under two channels.This is the result who adopts relevant displacement mapping scheme of conjugation and the associating of the described orthogonal transform transmission of formula (3) form in retransmission processes.

Please referring to Fig. 4, it is the data multiple channel transmission method second embodiment flow chart of a single aerial system of Unified coding modulation system.

The present embodiment and the first embodiment difference are: it is plural subband that base station assigns is given the running time-frequency resource of user terminal.Please in conjunction with consulting Fig. 5, it is the resource schematic diagram that to belong to same user's running time-frequency resource be six subbands.

Step 410: the base station is according to the channel quality information of user terminal feedback and the demand of downlink transfer business, for this user distributes time frequency unit: subband 1, subband 2, subband 3, subband 4, subband 5 and subband 6, according to the CQI mean value on above-mentioned six subbands, select a modulation coding mode simultaneously as the unified code modulation mode of all subbands of user.Because the specific implementation process of this step is identical with the step 210 of first embodiment, thereby repeats no more herein.

Step 420: when sending this user data for the first time, above-mentioned six subbands are divided into groups in twos.Described grouping in twos can be two adjacent subband combinations, also can be two subband combinations that disperse, and also can be random incorporation, as long as guarantee that the packet mode of subband all is known to transmitting terminal and receiving terminal.Suppose to be provided with subband 1 and subband 2 and be group a, subband 3 and subband 4 are group b, and subband 5 and subband 6 are c, and the data symbol on the every group two identical time frequency unit of subband is carried out orthogonal transform, send to user terminal then.

Among the group a, the data symbol that shines upon on subband 1 time frequency unit is designated as x _{1, k, t}, the data symbol that shines upon on subband 2 time frequency unit is designated as x _{2, k, t}, the data symbol on the time frequency unit of subband 1 and subband 2 same positions carries out orthogonal transform according to formula (3) is described:

$\left(\begin{array}{c}{\tilde{x}}_{1,k,t}\\ {\tilde{x}}_{2,k,t}\end{array}\right)=\left(\begin{array}{cc}\cos \mathrm{\θ}& \sin \mathrm{\θ}\\ -\sin \mathrm{\θ}& \cos \mathrm{\θ}\end{array}\right)\left(\begin{array}{c}{x}_{1,k,t}\\ x_{2,k,t}\end{array}\right)---\left(7\right)$

Among the group b, the data symbol that shines upon on subband 3 time frequency unit is designated as x _{3, k, t}, the data symbol that shines upon on subband 4 time frequency unit is designated as x _{4, k, t}, the data symbol on the time frequency unit of subband 3 and subband 4 same positions carries out orthogonal transform according to formula (3) is described:

$\left(\begin{array}{c}{\tilde{x}}_{3,k,t}\\ {\tilde{x}}_{4,k,t}\end{array}\right)=\left(\begin{array}{cc}\cos \mathrm{\θ}& \sin \mathrm{\θ}\\ -\sin \mathrm{\θ}& \cos \mathrm{\θ}\end{array}\right)\left(\begin{array}{c}{x}_{3,k,t}\\ x_{4,k,t}\end{array}\right)---\left(8\right)$

Among the group c, the data symbol that shines upon on subband 5 time frequency unit is designated as x _{5, k, t}, the data symbol that shines upon on subband 6 time frequency unit is designated as x _{6, k, t}, the data symbol on the identical time frequency unit of subband 5 and subband 6 same positions carries out orthogonal transform according to formula (3) is described:

$\left(\begin{array}{c}{\tilde{x}}_{5,k,t}\\ {\tilde{x}}_{6,k,t}\end{array}\right)=\left(\begin{array}{cc}\cos \mathrm{\θ}& \sin \mathrm{\θ}\\ -\sin \mathrm{\θ}& \cos \mathrm{\θ}\end{array}\right)\left(\begin{array}{c}{x}_{5,k,t}\\ x_{6,k,t}\end{array}\right)---\left(9\right)$

Through the data symbol after the orthogonal transform

Respectively from subband 1 and 2 (k t) sends on the individual time frequency unit; Data symbol

Respectively from subband 3 and 4 (k t) sends on the individual time frequency unit; Data symbol

Respectively from subband 5 and 6 (k t) sends on the individual time frequency unit.

Step 430: user terminal informs to the base station feedback confirmation whether the base station needs data retransmission.If enter step 440; Otherwise enter step 460: finish.Send out when for the first time and to stagger the time, user terminal can require the base station to carry out retransmitting the first time to the base station feedback nack message.

Step 440: the grouping scheme of base station when last time, (for the first time) data sent, as the grouping scheme of this re-transmission, promptly subband 1 and subband 2 are group a, and subband 3 and subband 4 are group b, and subband 5 and subband 6 are c.The data symbol that will belong to then on same group two subbands carries out the conjugation related replacement: in group a, the data symbol that sends in the subband 1 is got conjugation be mapped to subband 2, the data symbol that sends in the subband 2 is got negative conjugation be mapped to subband 1; In group b, the data symbol that sends in the subband 3 is got conjugation be mapped to subband 4, the data symbol that sends in the subband 4 is got negative conjugation be mapped to subband 3; In group c, the data symbol that sends in the subband 5 is got conjugation be mapped to subband 6, the data symbol that sends in the subband 6 is got negative conjugation be mapped to subband 5.

Step 450: the data symbol on every group the identical time frequency unit of two subbands is carried out orthogonal transform, send to user terminal then.

Specific implementation process of this step and step 420 in like manner thereby repeat no more herein.

Step 470: user terminal informs to the base station feedback confirmation whether the base station needs data retransmission for the second time.If enter step 480; Otherwise enter step 460.When the first time, re-transmission made mistakes, user terminal can require the base station to carry out retransmitting the second time to the base station feedback nack message.

Step 480: described six subbands are divided into groups again, and this grouping scheme is different with former grouping scheme.The grouping scheme is carried out orthogonal transform with the data symbol on the every group two identical time frequency unit of subband after determining, sends to user terminal then.

When for example retransmitting for the second time, subband 1 and subband 4 are made as group a, subband 2 and subband 5 are made as group b, and subband 3 and subband 6 are c.The data symbol that to organize then on the identical time frequency unit of subband 1 and subband 4 among a carries out orthogonal transform; Data symbol among the group b on the identical time frequency unit of subband 2 and subband 5 carries out orthogonal transform; Data symbol among the group c on the identical time frequency unit of subband 3 and subband 6 carries out orthogonal transform, sends to the terminal use then.

Step 490: user terminal informs to the base station feedback confirmation whether the base station needs data retransmission for the third time.If enter step 500; Otherwise enter step 460.When the second time, re-transmission made mistakes, user terminal can require the base station to retransmit for the third time to the base station feedback nack message.

Step 500: the grouping scheme the when base station will send (retransmitting for the second time) last time, as the grouping scheme of this re-transmission, be about to subband 1 and subband 4 and be made as group a, subband 2 and subband 5 are made as group b, and subband 3 and subband 6 are c.And the data symbol that will belong on same group two subbands carries out the conjugation related replacement: in group a, the data symbol that sends in the subband 1 is got conjugation be mapped to subband 4, the data symbol that sends in the subband 4 is got negative conjugation be mapped to subband 1; In group b, the data symbol that sends in the subband 2 is got conjugation be mapped to subband 5, the data symbol that sends in the subband 5 is got negative conjugation be mapped to subband 2; In group c, the data symbol that sends in the subband 3 is got conjugation be mapped to subband 6, the data symbol that sends in the subband 6 is got negative conjugation be mapped to subband 3.With the orthogonal transform of data symbol on the identical time frequency unit in every group of two subbands, send at last then.This shows, retransmit for the second time and the process that retransmits for the third time, with the process nature of first transmission and re-transmission for the first time is the same, be that concrete subband situation in every group has had variation: for example subband 2 first send and during first re-transmission and subband 1 be divided into one group, and when for the second time retransmitting and retransmitting for the third time, be divided into one group with subband 5, till UE receives correct or reaches the number of retransmissions of maximum.

Angle from the user terminal reception, when retransmitting for the third time, in the grouping scheme when retransmitting for the second time in every group the data symbol on two subbands carried out the conjugation related replacement, make user terminal in this twice retransmission processes, two equivalent channel of the data symbol process that receives are different, therefore can carry out joint-detection to this twice re-transmitted signal.In addition, owing to the data symbol on every group of interior two subbands has not only carried out the conjugation related replacement, also carried out orthogonal transform, therefore be used for joint-detection this twice re-transmitted signal the equivalent channel of process be quadrature, thereby can obtain the result that high specific merges under two channels.In addition, will carry out soft merging between twice re-transmission in back and the first signal that sends, retransmits for the first time.

Can know by inference in view of the above: after this, then repeat the process of above-mentioned steps 480 to 500 again as needing the 4th time and the 5th re-transmission, i.e. grouping again again, orthogonal transform sends; The data symbol that will belong on same group two subbands carries out the conjugation displacement, and quadrature sends then.Later retransmission processes also is.

Above-mentioned first embodiment and second embodiment are the data multiple channel process of transmittings when telling about the running time-frequency resource of distributing to same user and being the even number subband.Sum up as can be known, in a single aerial system:

Be even number if distribute to the subband number that certain user uses:, at first individual each subband is pairwise grouping when sending data first, and the data symbol on the identical time frequency unit of two subbands in every group is carried out sending after the orthogonal transform;

Retransmit if need, when then odd number retransmits, grouping scheme when last secondary data is sent is as the grouping scheme of this re-transmission, and the data symbol that sent in first subband last time is got conjugation be mapped on the same group second subband, the data symbol that sent in second subband last time is got negative conjugation be mapped on the same group first subband, then the data symbol on two subbands in every group is carried out sending after the orthogonal transform; When even number time retransmits, above-mentioned sub band resources is carried out new grouping in twos, and this grouping scheme before being different from the grouping scheme of useful mistake, and the data symbol on the identical time frequency unit of two subbands in every group carried out sending after the orthogonal transform.

Be odd number if distribute to the number of sub-bands that certain user terminal uses, then when first the transmission, at first need the antithetical phrase band to be pairwise grouping, the data symbol on every group the identical time frequency unit of two subbands carries out sending after the orthogonal transform, and the data symbol of a remaining subband directly sends and gets final product.

Retransmit if need, when then odd number retransmits, the scheme of will dividing into groups last time is as the grouping scheme of this re-transmission, and the data symbol that sent in first subband of every group last time is got conjugation be mapped on the same group second subband, the data symbol that sent in second subband last time is got negative conjugation be mapped on the same group first subband, then the data symbol on two subbands in every group is carried out sending after the orthogonal transform.In addition, a remaining subband does not carry out orthogonal transform and directly sends.When even number retransmits, above-mentioned sub band resources is carried out new grouping in twos, and this grouping scheme is different from former grouping scheme, and has neither part nor lot in the subband of grouping in the grouping last time scheme, participate in this grouping again, a remaining subband does not carry out orthogonal transform and directly sends.The sub band number of for example distributing to the user is 3, and note does 1,2,3; The antithetical phrase band divides into groups to obtain (1,2) and 3 when supposing first the transmission, as if need retransmit for the second time the time, subband be grouped into (1,3), 2.Again after grouping scheme is determined, the data symbol on two subbands in every group is carried out sending after the orthogonal transform.

More than set forth in single antenna multicarrier system, used a plurality of embodiment of the present invention program.Below multiple antenna and carrier system is elaborated.At multiple antenna and carrier system two kinds of situations are arranged also: antenna is AMC and antenna HARQ multiaerial system independently independently; The HARQ multiaerial system that AMC that antenna is unified and antenna are unified.

Independently AMC and antenna are independently in the HARQ multiaerial system at antenna, and the data block on each antenna is passed through CRC respectively, is mapped to the user on a plurality of subbands of this antenna after chnnel coding and the modulation.Therefore similar with single antenna, the data on each antenna can be handled according to the described method of top a single aerial system fully in first transmission and retransmission processes, because preamble had carried out detailed description, this place just repeats no more.In brief, each antenna is all taked independently AMC and HARQ scheme, does not exist data to reflect problems such as displacement, mapping between the different sub-band of different antennae.

In the unified HARQ multiaerial system of the unified AMC of antenna and antenna, a data block is mapped to the user through CRC on a plurality of subbands on a plurality of antennas after chnnel coding and the modulation.In this system, the data of each antenna can be handled according to the described method of top a single aerial system in first transmission and retransmission processes equally fully.Because multiaerial system Duo the space one dimension than a single aerial system, have on each antenna so distribute to user's subband in addition, the therefore sending method of same data on a plurality of antennas also can reach the purpose of user terminal acquisition diversity gain.See also Fig. 6, it is the embodiment flow chart of the data transmission method for uplink of unified AMC of multiaerial system antenna and HARQ.

Step 610: the base station is according to the channel quality information of user terminal feedback and the demand of downlink transfer business, the running time-frequency resource that distributes on 2 antennas for this user is: subband 1, subband 2, subband 3 and subband 4, according to the CQI mean value on above-mentioned eight subbands, select a modulation coding mode simultaneously as the unified code modulation mode of all subbands of user.Please in conjunction with the sub band resources schematic diagram of consulting under the multiaerial system shown in Figure 7.That is, the subband 1,2,3,4 on the antenna 1 and 2 is distributed to this user simultaneously, and this user has taken 8 subbands altogether.

Step 620: when sending for the first time the subband on each antenna is carried out the grouping of same approach, every group of two subbands, and the data on the time frequency unit of same position in two subbands in every group are carried out orthogonal transform and send.Described grouping scheme can be two adjacent subband combinations, also can be two subband combinations that disperse, and perhaps random packet is as long as the grouping scheme of subband all is known to transmitting terminal and receiving terminal.The specific implementation of orthogonal transform had carried out introducing in detail in a single aerial system, just repeated no more herein.

When supposing first the transmission, the data acquisition system that is mapped to four subbands on the antenna 1 is expressed as X ₁₁, X ₁₂, X ₁₃, X ₁₄, the data acquisition system that is mapped to four subbands on the antenna 2 is expressed as X ₂₁, X ₂₂, X ₂₃, X ₂₄When above-mentioned 8 sons are brought into the row grouping, should be noted that the grouping scheme of subband on two antennas is consistent, even i subband and j the subband on the antenna 1 is one group, and i subband and j subband on the same antenna 2 also are one group.Suppose in the present embodiment that all subband 1 and subband 2 are divided into group a on antenna 1 and the antenna 2, subband 3 and subband 4 are divided into group b, promptly for antenna 1, data acquisition system X ₁₁, X ₁₂Belong to group a, X ₁₃, X ₁₄Belong to group b; For antenna 2, data acquisition system X ₂₁, X ₂₂Belong to group a, X ₂₃, X ₂₄Belong to group b.

Step 630: user terminal informs to the base station feedback confirmation whether the base station needs data retransmission.If enter step 640; Otherwise enter step 650: finish.

Step 640: during re-transmission group of the m on the antenna 1 and the n group on the antenna 2 are carried out data replacement, the n group on the antenna 2 is carried out data replacement, wherein m=n or m ≠ n with the m group on the antenna 1.With m ≠ n is example: the group b of group a on the antenna 1 and antenna 2 is replaced; The group a of the group b of antenna 1 and antenna 2 replaces, when promptly retransmitting on the antenna 1 data acquisition system on the subband 1,2,3,4 be respectively X ₂₃, X ₂₄, X ₂₁, X ₂₂, subband 1,2 on the antenna 2, and the data acquisition system on 3,4 is respectively X ₁₃, X ₁₄, X ₁₁, X ₂₁Then the data symbol on the time frequency unit of same position in every group of two subbands is carried out orthogonal transform and transmission.Certainly, in the practical application, each subband group on will each antenna all with other antennas on subband group carry out data replacement, as long as organizing subband with certain of other antennas, one group of subband on antenna carries out data replacement, just can reach user terminal to receive for twice replace after signal carry out the purpose of joint-detection, just do not have whole subband group all to carry out the effective of data replacement.

By said process as can be known, the data symbol of identical time frequency unit carries out orthogonal transform in two subbands, make each symbol through two sub-carrier channels, during re-transmission owing to changed antenna and carried out orthogonal transform, make each symbol pass through two independently sub-carrier channels again, therefore make each symbol pass through four channels through once retransmitting, will obtain very high diversity gain when like this signal of this twice transmission being carried out joint-detection, and then improve the performance of system.

The foregoing description is with two transmitting antennas, and to distribute to user's 4 subbands on each antenna be example, illustrates how the present invention program realized when the subband number of distributing to the user was even number.As long as distributing to user's subband number on each antenna is even number, just a plurality of subbands on each antenna is pairwise grouping when sending for the first time, and the data symbol on the every group two identical time slot of the subband unit is carried out orthogonal transform and transmission; In the time of need retransmitting for the first time, one group of subband when will send (the first transmission) last time at least one antenna and one group of subband of other antennas carry out data replacement, preferably, whole subband group on each antenna and the subband group on other antennas are carried out data replacement, and the data symbol on two the identical time slot of subband unit in every group is carried out sending after the orthogonal transform.Retransmit for the second time if need, one group of subband when then will send (retransmitting for the first time) last time at least one antenna and a group of other antennas carry out data replacement, preferably, whole subband group on each antenna and the subband group on other antennas are carried out data replacement, and the data symbol on two identical time frequency unit of subband in every group carried out sending after the orthogonal transform, later retransmission processes and the like, till UE receives correct or reaches the number of retransmissions of maximum.When it should be noted that each re-transmission, the scheme of carrying out data replacement between the subband group of different antennae is all inequality.

The subband of respectively organizing on the different antennae is that unit carries out the phase double replacement with the group, and the mode of displacement has multiple.How whole subband group of telling about below between the different antennae carry out data replacement.Usually adopt the cyclic permutation method:

Supposing has 4 groups of subbands respectively on antenna 1 and the antenna 2, when retransmitting for the first time the group 1 of antenna 1 is carried out data replacement with the group 2 of antenna 2, the group 2 of antenna 1 is carried out data replacement with the group 3 of antenna 2, the group 3 of antenna 1 is carried out data replacement with the group 4 of antenna 2, and the group 4 of antenna 1 is carried out data replacement with the group 1 of antenna 2;

When retransmitting for the second time, the group 1 of antenna 1 is carried out data replacement with the group 3 of antenna 2, and the group 2 of antenna 1 is carried out data replacement with the group 4 of antenna 2, and the group 3 of antenna 1 is carried out data replacement with the group 1 of antenna 2, the group 4 of antenna 1 is carried out data replacement with the group 2 of antenna 2, later and the like.

Also can adopt other displacement methods at random, when for example retransmitting for the first time the group 1 of antenna 1 is carried out data replacement with the group 1 of antenna 2, the group 2 of antenna 1 is carried out data replacement with the group 2 of antenna 2, the group 3 of antenna 1 is carried out data replacement with the group 3 of antenna 2, and the group 4 of antenna 1 is carried out data replacement with the group 4 of antenna 2; When retransmitting for the second time, the group 1 of antenna 1 is carried out data replacement with the group 2 of antenna 2, and the group 2 of antenna 1 is carried out data replacement with the group 3 of antenna 2, and the group 3 of antenna 1 is carried out data replacement with the group 4 of antenna 2, the group 4 of antenna 1 is carried out data replacement with the group 1 of antenna 2, later and the like.

If the subband number of distributing for certain user is an odd number, then after the grouping, also remain a subband on each antenna on each antenna.During first the transmission, a remaining subband does not need orthogonal transform directly to send on two antennas.During re-transmission, a remaining subband can change antenna and also can not change on two antennas.

The above-mentioned multicarrier system of introducing two antennas, if what adopt is system more than two antennas, principle is the same, the degree of freedom that is each data replacement is bigger.Suppose to have four transmitting antennas, the resource of distributing to the user has four subbands on each antenna.During first the transmission, the data acquisition system of four subbands is respectively X on the antenna 1 ₁₁, X ₁₂, X ₁₃, X ₁₄, the data acquisition system of four subbands is respectively X on the antenna 2 ₂₁, X ₂₂, X ₂₃, X ₂₄, the data acquisition system of four subbands is respectively X on the antenna 3 ₃₁, X ₃₂, X ₃₃, X ₃₄, the data acquisition system of four subbands is respectively X on the antenna 4 ₄₁, X ₄₂, X ₄₃, X ₄₄, four subbands on each antenna all are divided into corresponding two groups, be designated as first group of subband and second group of subband; When retransmitting for the first time, can adopt previously described cyclic permutation method to carry out data replacement fully, to organize 1 is example: the data replacement on 1 first group of subband of antenna is to first group of subband of antenna 2, data replacement on 2 first groups of subbands of antenna is to first group of subband of antenna 3, data replacement on 3 first groups of subbands of antenna is to first group of subband of antenna 4, data replacement on 4 first groups of subbands of antenna is to first group of subband of antenna 1, and second group of subband also is to carry out and first group of subband similar data method of replacing.Later on as need to retransmit once more, according to the principle that retransmits for the first time and the like get final product, repeat no more, at last till UE receives correct or reaches the number of retransmissions of maximum.

Above the example of described multiaerial system all be that example describes with the physical antenna, in multiaerial system, carry out certain processing usually and obtain virtual-antenna, as the multiaerial system of four transmitting antennas and four reception antennas, channel matrix is H _{4 * 4}, if the data number that sends is m, 1≤m≤4, and through a matrix P _{4 * m}, 1≤m≤4 conversion is sending from four antennas through the symbol after the conversion, promptly

Y＝HPX+n (10)

Wherein Y is a received signal, and n is a noise; Formula (10) can further be written as

$Y=\tilde{H}X+n,---\left(11\right)$

Think that promptly the channel that sends signal X process is ${\tilde{H}}_{4\×m}=H_{4\×4}{P}_{4\×m},$ This equivalent system can be regarded as m transmitting antenna, the multiaerial system of 4 reception antennas, and wherein this m antenna is a virtual-antenna just, the therefore top described method that is applied in the multiaerial system also can be adapted to virtual-antenna.

The invention discloses a kind of data multiple channel dispensing device of multicarrier system, comprise subband map unit and coupled grouped element and orthogonal transform unit.Wherein, the subband map unit is used for and will belongs to same user's data sign map to being a plurality of subbands of its distribution, and the sub-band information that uses is informed grouped element; Grouped element, a plurality of sub band resources that are used for belonging to same user on the same antenna are pairwise grouping, and the grouping scheme is informed orthogonal transform unit; Orthogonal transform unit is used for the data symbol on two identical time frequency unit of subband in every group is carried out orthogonal transform.

See also Fig. 8, it is the data multiple channel dispensing device embodiment schematic diagram of multicarrier system disclosed by the invention.Described device 80 comprises CRC coded modulation unit 801, serial to parallel conversion unit 802, conjugation correlation unit 803, subband map unit 804, grouped element 805, orthogonal transform unit 806, transmitting element 807 and sends record cell 808.

Serial to parallel conversion unit 802 is connected between CRC coded modulation unit 801 and the subband map unit 804, and orthogonal transform unit 806 is connected between subband map unit 804 and the transmitting element 807.In addition, conjugation correlation unit 803 is connected between serial to parallel conversion unit 802 and the subband map unit 804, grouped element 805 is connected between subband map unit 804 and the orthogonal transform unit 806, sends record cell 808 and is connected between serial to parallel conversion unit 802 and the grouped element 805.

The operation principle of the detailed introducing system 80 of certain user data that sends below in conjunction with reality.

Send to certain user's data piece, at first carry out cyclic redundancy check (CRC), coding and modulation, form the data symbol that needs,, therefore no longer describe in detail because CRC coded modulation unit 801 is identical with prior art by CRC coded modulation unit 801.

After this, data symbol enters serial to parallel conversion unit 802, the 802 pairs of data symbols that enter in serial to parallel conversion unit carry out corresponding serial to parallel conversion, and it is divided into a plurality of parts, and the concrete number of described a plurality of parts is corresponding with the number of sub-bands that system assignment uses for this user.The number of sub-bands that supposing the system is distributed to this user's use is two, and then serial to parallel conversion unit 802 will be divided into two parts by 801 data symbols of exporting from CRC coded modulation unit; The number of sub-bands that supposing the system is distributed to this user's use is four, and then serial to parallel conversion unit 802 will be divided into four parts by 801 data symbols of exporting from CRC coded modulation unit.

At this moment, according to sending the information that record cell 808 provides, decision is sent to subband map unit 804 or conjugation correlation unit 803 through the data symbol of serial to parallel conversion unit 802 outputs.Send record cell, be used to write down the number of times that same data block sends, in other words, can know that by sending record cell the data block of this transmission is which time transmission of this data block.If sending record cell 808 these transmissions of record is to send a new data information, illustrate that then this is the first transmission of these data; Sent once before this if record obtains the data of this transmission, proved then that the transmission of this secondary data belonged to re-transmission for the first time; If record obtains the data of this transmission and had sent twice before this, prove that then the transmission of this secondary data belongs to re-transmission for the second time, later and the like.

When data were first transmission and the inferior repeating transmission of even number, the data symbol of serial to parallel conversion unit 802 outputs directly entered subband map unit 804; When data were the re-transmission of the odd number, the data symbol of serial to parallel conversion unit 802 outputs at first entered conjugation correlation unit 803, and then enters subband map unit 804.The information notice packet unit 805 that described transmission record cell 808 is also known it.Below first transmission and re-transmission are introduced respectively.

When this is the first transmission or the even number time re-transmission of data, be that the data symbol of serial to parallel conversion unit 802 output is when directly entering subband map unit 804,804 of subband map unit map directly to the each several part data symbol on each subband according to conventional method, and with the sub-band information notice packet unit 805 that uses.For example, supposing to distribute to the subband that certain user uses is subband 1 and subband 2, and the front said that serial to parallel conversion unit 802 at this moment can be equally divided into two parts with the data of CRC coded modulation unit 801 outputs.Wherein a part of data map is distributed in the subband 1, is designated as X ₁, another part data map is distributed in the subband 2, is designated as X ₂The X here ₁, X ₂Be meant a set of all data symbols in each subband, each time frequency unit in the subband all has a data symbol, x _{1, k, t}Be (k, the t) data symbol on the time frequency unit, x in the subband 1 _{2, k, t}Be (k, t) data symbol on the time frequency unit in the subband 2.Wherein, k represents on k the subcarrier of described time frequency unit in this subband; T represents on t the OFDM symbol of described time frequency unit in this subband.

When this is the odd number time re-transmission of data, the data symbol that is 802 outputs of serial to parallel conversion unit at first enters conjugation correlation unit 803, and then when entering subband map unit 804, grouping scheme information when sent the last time that conjugation correlation unit 803 provides according to grouped element 805 is got conjugation with the data symbol that sent last time in first subband; The data symbol that sent last time in second subband is got negative conjugation, after this enter subband map unit 804.The data symbol that subband map unit 804 obtains after the data symbol that sent in first subband last time is got conjugation is mapped to second subband on the same group, the data symbol that sent in second subband last time is got the data symbol that obtains after the negative conjugation be mapped on the same group first subband.

No matter be that first transmission, even number retransmit or odd number retransmits, the data of subband map unit 804 outputs all enter orthogonal transform unit 806, simultaneously orthogonal transform unit 806 also receives this grouping scheme that grouped element 805 provides, and then orthogonal transform unit 806 is carried out orthogonal transform with the data symbol on the identical time frequency unit in two subbands in every group.Described orthogonal transform mainly is that the data symbol on the identical time frequency unit in two subbands in every group is constituted column vector, multiplies each other with it with the orthogonal matrix or the unitary matrice that are stored in the orthogonal transform unit 806 in advance then, can realize the purpose of orthogonal transform.

Grouped element 805 is determined the grouping scheme according to the information that this subband that sends transmission number of times information that record cell 808 provides and subband map unit 804 and provide uses.If send data for the first time, the grouping scheme in twos of scheme or the adjacent sub-bands of then can dividing into groups in twos at random; If even retransmits, then be pairwise grouping again, and this grouping scheme is different from former grouping scheme; If odd number retransmits, the grouping scheme in the time of then will going up the secondary data transmission is as this grouping scheme.Should be noted that a problem this moment, because the number of sub-bands of distributing on the same antenna that the user uses may be odd number, and the grouping that grouped element 805 carries out all is to divide into groups in twos, finally can be left a subband and fail to participate in grouping, though at this moment the data symbol on this subband also enters orthogonal transform unit, but, therefore directly send by transmitting element 807 without orthogonal transform owing to do not satisfy the condition of orthogonal transform.

Independently AMC and antenna are independently in the HARQ multiaerial system at antenna, and the data block on each antenna is passed through CRC respectively, is mapped to the user on a plurality of subbands of this antenna after chnnel coding and the modulation.Therefore similar with single antenna, therefore can adopt each unit recited above to carry out same treatment fully, because preamble had carried out detailed description, this place just repeats no more.

In the unified HARQ multiaerial system of the unified AMC of antenna and antenna, a data block is mapped to the user through CRC on a plurality of subbands on a plurality of antennas after chnnel coding and the modulation.In this system, the data of each antenna still can adopt each unit recited above to carry out same treatment fully.In addition, because multiaerial system Duo the space one dimension than a single aerial system, have on each antenna so distribute to user's subband, the therefore transmission of same data on a plurality of antennas also can reach the purpose of user terminal acquisition diversity gain.Therefore in this system, described device can also be provided with a data displacement subelement in the subband map unit, be used for one group of subband at least one antenna and one group of subband on other antennas are carried out data replacement, after this enters orthogonal transform unit.The processing procedure of other correlation units is identical with embodiment recited above, repeats no more.

In addition, the data multiple channel dispensing device of the multicarrier system described in the foregoing description in actual applications, also grouped element and conjugation correlation unit can be set, promptly first the transmission with retransmitting adopted identical technical scheme: the data symbol of serial to parallel conversion unit output, after carrying out subband mapping by the subband map unit, enter orthogonal transform unit and carry out orthogonal transform, send by transmitting element at last.Though this technical scheme, user terminal can't carry out joint-detection to the same signal that front and back receive for twice.But data have all been carried out orthogonal transform by orthogonal transform unit to data before sending, and make same data symbol experience two different channels, so user terminal also can obtain frequency diversity gain to a certain degree.

If also be provided with grouped element and conjugation correlation unit in the described device, make and to carry out the conjugation related replacement to the data symbol on every group of two subbands when retransmitting, and then two equivalent channel of the same signal process that twice receives before and after the user terminal are different, therefore user terminal not only can obtain above-mentioned frequency diversity gain, can also carry out joint-detection to the received signal of first transmission and re-transmission, and then obtain diversity gain once more.

More than the data multiple channel sending method and the device of a kind of multicarrier system disclosed by the invention is described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (20)

1, a kind of data multiple channel sending method of multicarrier system, each subband that belongs to same user on the same antenna adopts unified coded system, it is characterized in that:

Determine to belong on the same antenna grouping scheme in twos of a plurality of sub band resources of same user;

Data symbol on the identical time frequency unit in two subbands in every group is carried out sending after the orthogonal transform.

2, the data multiple channel sending method of multicarrier system as claimed in claim 1 is characterized in that: when sending for the first time, described a plurality of sub band resources are carried out random packet in twos.

3, the data multiple channel sending method of multicarrier system as claimed in claim 1 is characterized in that: when sending for the first time, described a plurality of sub band resources are carried out the grouping in twos of adjacent sub-bands.

4, the data multiple channel sending method of multicarrier system as claimed in claim 1 is characterized in that: when even number retransmits, described a plurality of sub band resources are pairwise grouping again, this grouping scheme is different from former grouping scheme.

5, the data multiple channel sending method of multicarrier system as claimed in claim 4, it is characterized in that: if belong to same user's number of sub-bands on the same antenna is odd number, then in the packet mode when last secondary data sends, a subband that has neither part nor lot in grouping participates in this grouping again.

6, as the data multiple channel sending method of any described multicarrier system in the claim 1 to 5, it is characterized in that: when odd number retransmitted, the grouping scheme when last secondary data is sent was as the grouping scheme of this re-transmission.

7, the data multiple channel sending method of multicarrier system as claimed in claim 6, it is characterized in that: the data symbol in two subbands in every group on the identical time frequency unit carries out before the orthogonal transform, the data symbol that sent in first subband last time is got conjugation be mapped on the same group second subband; The data symbol that sent in second subband last time is got negative conjugation be mapped on the same group first subband.

8, as the data multiple channel sending method of any described multicarrier system in the claim 1 to 5, it is characterized in that:

Data symbol on the identical time frequency unit in two subbands in described every group is constituted column vector;

Orthogonal matrix or unitary matrice and described column vector are multiplied each other, carry out orthogonal transform.

9, the data multiple channel sending method of multicarrier system as claimed in claim 1 is characterized in that:

If belonging to same user's sub band resources number on the same antenna is odd number, the subband data symbol that then has neither part nor lot in grouping directly sends without orthogonal transform.

10, the data multiple channel sending method of multicarrier system as claimed in claim 1, it is characterized in that: adopt in the multiaerial system of Unified coding mode at each antenna, during data retransmission, data symbol in two subbands in every group on the identical time frequency unit carries out before the orthogonal transform, and one group of subband at least one antenna and one group of subband on other antennas are carried out data replacement.

11, the data multiple channel sending method of multicarrier system as claimed in claim 10 is characterized in that: during data retransmission, carry out the data replacement of random fashion or the data replacement of endless form between the subband group of different antennae.

12, the data multiple channel sending method of multicarrier system as claimed in claim 10 is characterized in that, during each data retransmission, the data replacement scheme between the subband group of different antennae is all different.

13, the data multiple channel sending method of multicarrier system as claimed in claim 10 is characterized in that: each antenna adopts identical grouping scheme.

As the data multiple channel sending method of any described multicarrier system in the claim 10 to 13, it is characterized in that 14, described antenna is physical antenna or virtual-antenna.

15, a kind of data multiple channel dispensing device of multicarrier system is characterized in that comprising:

The subband map unit is used for and will belongs to same user's data sign map to being a plurality of subbands of its distribution, and the sub-band information that uses is informed grouped element;

Grouped element, a plurality of sub band resources that are used for belonging to same user on the same antenna are pairwise grouping, and the grouping scheme is informed orthogonal transform unit;

Be connected in the orthogonal transform unit after the subband map unit, be used for the data symbol on two identical time frequency unit of subband in every group is carried out orthogonal transform.

16, the data multiple channel dispensing device of multicarrier system as claimed in claim 15 is characterized in that also comprising: send record cell, be used to write down the number of times that same data send.

17, the data multiple channel dispensing device of multicarrier system as claimed in claim 16 is characterized in that: described grouped element is provided with the grouping scheme according to the number of times that data send.

18, the data multiple channel dispensing device of multicarrier system as claimed in claim 15 is characterized in that also comprising: be connected in subband map unit conjugation correlation unit before, be used for got conjugation at the data symbol that first subband sends last time; The data symbol that sent last time in second subband is got negative conjugation.

19, the data multiple channel dispensing device of multicarrier system as claimed in claim 18 is characterized in that: when odd number time data retransmission, before data enter the subband map unit, call described conjugation correlation unit; During even number time data retransmission, never call described conjugation correlation unit.

20, the data multiple channel dispensing device of multicarrier system as claimed in claim 15, it is characterized in that: adopt in the multiaerial system of Unified coding mode at each antenna, described subband map unit also comprises the data replacement subelement, is used for one group of subband at least one antenna and one group of subband on other antennas are carried out data replacement.

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