CN102055559A - Data processing method and device - Google Patents
Data processing method and device Download PDFInfo
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- CN102055559A CN102055559A CN2009101099367A CN200910109936A CN102055559A CN 102055559 A CN102055559 A CN 102055559A CN 2009101099367 A CN2009101099367 A CN 2009101099367A CN 200910109936 A CN200910109936 A CN 200910109936A CN 102055559 A CN102055559 A CN 102055559A
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Abstract
The embodiment of the invention discloses a data processing method and device. The method comprises the following steps of: carrying out interlacing processing on N modulated code words to obtain N virtual code words so that each virtual code word generated through the interlacing comprises a part of data of each modulated code word; mapping the obtained N virtual code words to M layers, wherein N is an integer not less than 2, and M is an integer not less than N and less than 2N; and respectively carrying out discrete forurier transform and fast fourier transform on the data mapped to different layers to obtain a result of each layer. The scheme ensures that at least two modulated code words are uniformly mapped to the plurality of transmission layers of an MIMO (Multiple Input Multiple Output) system, and therefore, the space diversity gain of the subsequent data transmission can be improved.
Description
Technical field
The present invention relates to the communications field, field, relate in particular to a kind of data processing method and device.
Background technology
Can adopt SC-FDMA (Single Carrier Frequency Division Multiple Access in the wireless communication system, single-carrier frequency division multiple access) transmission means is carried out the signal transmission, and can adopt multi-antenna technology on this basis, make SC-FDMA technology and MIMO (Multi Input Multi Output, multiple-input and multiple-output) technology combines, and forms the MIMO-SC-FDMA system.Not only in the SC-FDMA system, in various types of communication systems, the MIMO technology can well be used.
In a mimo system, suppose to exist 2 antennas, can there be the data source of a correspondence in each antenna, the data flow that these 2 data sources form can be called code word 1 (CW1, Codeword1) with code word 2 (CW2, Codeword2).Mimo system can be respectively to two code words encode, modulation, discrete Fourier transform (DFT, Discrete Fourier Transform), and with the data map behind the DFT on transport layer (Layer), carry out inverse fast Fourier transform (IFFT for every layer data then, Inverse Fast Fourier Transformation) operation such as, the data after handling the most at last send.
The inventor finds that there is following problem at least in prior art: each data symbol that forms behind the DFT can be mapped on one or several transport layer the space diversity gain that does not also have maximized utilization to reach at present.
Summary of the invention
The embodiment of the invention provides a kind of data processing method and device, to improve the space diversity gain of transmission data in the mimo system.
According to one embodiment of the invention, a kind of data processing method is provided, comprising:
Code word after N the modulation is carried out interleaving treatment, obtain N virtual code word, each virtual code word that the feasible back that interweaves generates comprises the partial data of the code word after each modulation;
The N that obtains virtual code word is mapped on M layer, and wherein N is the integer more than or equal to 2, and M is more than or equal to N and less than the integer of 2N;
The data that are mapped on the different layers are carried out discrete Fourier transform and inverse fast Fourier transform respectively, obtain result at each layer.
According to still another embodiment of the invention, provide a kind of data processing equipment, comprising:
Interleaving block is used for the code word after N the modulation is carried out interleaving treatment, obtains N virtual code word, and each virtual code word that the feasible back that interweaves generates comprises the partial data of the code word after each modulation;
Mapping block is used for the N that will obtain virtual code word and is mapped to M layer, and wherein N is the integer more than or equal to 2, and M is more than or equal to N and less than the integer of 2N;
Generation module is used for the data that are mapped on the different layers are carried out discrete Fourier transform and inverse fast Fourier transform respectively, obtains the result at each layer.
According to description to technique scheme, the embodiment of the invention has following advantage: each the virtual code word that generates after interweaving by interleaving treatment is feasible comprises the partial data of the code word after each modulation, pass through sequence of operations such as a layer mapping, discrete Fourier transform, inverse fast Fourier transform again, make that the code word after at least 2 modulation is mapped on a plurality of transport layers of mimo system equably, can improve the space diversity gain of subsequent data transmission.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, to do to introduce simply to the accompanying drawing that embodiment need use below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The schematic diagram of a kind of data processing method that Fig. 1 provides for embodiments of the invention;
The schematic diagram of the data processing method of a kind of 2 inputs, 2 output systems that Fig. 2 provides for embodiments of the invention;
The schematic diagram of a kind of 2 code word interleaving processs that Fig. 3 provides for the embodiment of the invention;
A kind of schematic diagram that 2 code words is mapped to 3 methods on the transport layer that Fig. 4 provides for embodiments of the invention;
The schematic diagram of a kind of data processing equipment that Fig. 5 provides for embodiments of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The schematic diagram of a kind of data processing method that Fig. 1 provides for embodiments of the invention, this method comprises:
S11: the code word after N the modulation is carried out interleaving treatment, obtain N virtual code word, each virtual code word that the feasible back that interweaves generates comprises the partial data of the code word after each modulation;
S12: the N that obtains virtual code word is mapped on M layer, and wherein N is the integer more than or equal to 2, and M is more than or equal to N and less than the integer of 2N;
S13: the data that are mapped on the different layers are carried out discrete Fourier transform and inverse fast Fourier transform respectively, obtain result at each layer.
Each virtual code word that present embodiment generates by the feasible back that interweaves of interleaving treatment comprises the partial data of the code word after each modulation, pass through sequence of operations such as a layer mapping, discrete Fourier transform, inverse fast Fourier transform again, make that the code word after at least 2 modulation is mapped on a plurality of transport layers of mimo system equably, can improve the space diversity gain of subsequent data transmission.The described even mapping of present embodiment just makes the related data that all is distributed with different code words on each layer.In the present embodiment, N the virtual code word that the back that interweaves generates can be respectively equate with code word size after N the modulation, and the code word that the generation all lengths that can prevent to interweave does not wait more meets the regulation of prior art standard.But it will be appreciated by those skilled in the art that the pseudo code word length that the back that interweaves generates also can be unfixed,, also do not influence the enforcement of present embodiment even if N the pseudo code word length that generates is different with code word after N is modulated.In embodiments of the present invention, described each code word is a data flow, the data flow that the code word after the modulation just generates through ovennodulation.Generally, can have a plurality of data sources in the mimo system, each data source can produce respective stream of data, i.e. code word.The code word of these code words after will generating described modulation through coding with after modulating, described coded system can include but not limited to modes such as Turbo (Te Bo) coding.Described method is applicable to various modes such as SC-FDMA and OFDM, and LTE (Long Term Evolution, Long Term Evolution), LTE-A (LTE-Advanced, the evolution of LTE) system are this method typical application scenes.
In a kind of concrete application, described N the virtual code word that obtains is mapped on M the layer comprises: when number of plies M is equal with virtual code word number N, described N virtual code word is mapped to respectively on described M the layer.In a kind of concrete application, N=2 or 4.
In a kind of concrete application, the described N that obtains virtual code word is mapped on M layer comprises: as number of plies M during greater than virtual code word number N and less than 2N, M-N virtual code word is mapped on the individual layer of 2 (M-N), makes that each the virtual code word in described M-N the virtual code word is mapped to respectively on 2 layers; All the other 2N-M virtual code words are mapped in respectively on other (2N-M) individual layer.In a kind of concrete application, N=2, M=3; Perhaps N=3, M=4.
Further, described method also can comprise: for described result at each layer increases Cyclic Prefix and carries out upconversion process, obtain the data to be sent at each layer; Send described data to be sent.After a series of processing, data to be sent can be sent out on the different layers of mimo system, make the space diversity gain of transfer of data be improved.
For ease of those skilled in the art's understanding, be that example describes with 2 inputs, 2 output systems below, the schematic diagram of the data processing method of a kind of 2 inputs, 2 output systems that Fig. 2 provides for embodiments of the invention, described method comprises:
S21: code word 1 and code word 2 are carried out Turbo decoding and modulation, code word 1 and code word 2 after obtaining modulating.Be appreciated that in this process the decoding form can have multiple and be not limited only to Turbo decoding.
S22: code word after the modulation 1 and code word 2 are carried out interleaving treatment, obtain corresponding virtual code word 1 and virtual code word 2, the code word 1 after the length of wherein virtual code word 1 and virtual code word 2 equals respectively to modulate and the length of code word 2.Interleaving treatment also is replacement Treatment, is a kind of common data processing method, for ease of understanding, is that example briefly introduces described interleaving process with interweaving of 2 code words below.The schematic diagram of a kind of 2 code word interleaving processs that Fig. 3 provides for the embodiment of the invention.Output 2 road code streams after the supposing the system modulation, from the 1 road code stream intercepted length be N1 code word as the modulation after code word 1, from the 2 road code stream intercepted length be N2 code word as the modulation after code word 2, the number of included data symbol in the code word after so-called herein length is just modulated.(a N1-X described herein data are exactly N1-X data symbol in the code word with N1-X data in the code word 1 after the modulation, represent with a1 among Fig. 3) with modulation after code word 2 in new data of X data (representing with b2 among Fig. 3) compositions, be virtual code word 1, its length is N1; N2-X data (representing with b1 among Fig. 3) in the code word 2 after X data (representing with a2 among Fig. 3) in the code word 1 after the modulation and the modulation are formed new data, and promptly virtual code word 2, its length are N2.Said process can be thought a data regrouping process, and the virtual code word after the reorganization comprises the content of the code word after original 2 modulation.The value of N1, N2 and X can be selected arbitrarily according to actual needs by those skilled in the art, selecting which partial data symbol to form new virtual code word 1 from code word 1 and code word 2 can be arbitrarily (among Fig. 3 with back X data instance of preceding N1-X the data and the code word 2 of code word 1, but this description only for example, be not used in and limit present embodiment), present embodiment is not done qualification to this, as long as reorganization back pseudo code word length equals the length of corresponding modulation back code word.
S23: virtual code word 1 and virtual code word 2 are mapped to respectively on 2 layers.
S24: carry out discrete Fourier transform and inverse fast Fourier transform respectively to being mapped in 2 data on the layer, obtain 2 outputs.
S25:, obtain 2 data to be sent for described 2 outputs increase Cyclic Prefix and carry out upconversion process.In different application systems, inverse transformation output is the result can be used to carry out different further processing, and in the LTE system, inverse transformation output result will increase Cyclic Prefix and upconversion process usually before emission.For other further handling process that may occur, present embodiment is not done further qualification.
S27: send 2 data to be sent.
Present embodiment is output as example with 2 inputs 2 and has introduced a kind of data processing method, and above-mentioned processing is mapped on 2 layers 2 circuit-switched data equably, has improved the space diversity gain of transfer of data in 2 inputs, 2 communication systems.Said system is emitted as the example explanation with 2 antennas, is appreciated that such technical scheme can be used in the application scenarios of any many antennas.Interweave for the interleaving process between N code word and 2 code words and there is no substantive difference, the length of N code word can be identical and different, can from N code word, respectively extract the data of different length and form N virtual code word, the length of the virtual code word that each reorganization back forms and the equal in length of corresponding former code word.
Under application scenes, the number of data source can be not equal to the antenna number.For example when there being 2 data sources, when but having 3 antennas, prior art can not realize well that 2 code words evenly are mapped on 3 layers.Present embodiment can be mapped to 2 code words on 3 transport layers after interweaving.A kind of schematic diagram that 2 code words is mapped to 3 methods on the transport layer that Fig. 4 provides for embodiments of the invention.Suppose that 2 code word sizes are A and B, a code word 1 in 2 code words can be mapped on 2 layers in 3 layers and (represent) with layer 1 and layer 2, these 2 layers can be selected arbitrarily from 3 layers, and mapping herein can be average mapping, make A/2 the data of respectively shining upon former code word on layer 1 and the layer 2; Another code word 2 in 2 code words can be mapped on the layer 3.Those skilled in the art are easy to the scene of this application to N code word and M layer, and wherein N is the integer more than or equal to 2, and M is greater than N, less than the integer of 2N.For example be mapped to 4 layers situation, 1 code word wherein can be mapped to wherein on 2 layers, all the other 2 code words are mapped on other 2 layers for 3 code words.Because the data before the mapping have been passed through and interweaved, therefore 2 code words each some are mapped on 3 transport layers, shine upon more evenly, can improve the diversity gain of subsequent data transmission.Mapping process for more code words and interlayer, also can adopt same principle, 1 code word can not only be mapped on 1 and 2 layers, those skilled in the art can understand, 1 code word can be mapped as N layer (N is the integer greater than 2), and code word can on average be split as N part and every part is mapped to respectively on 1 layer when described mapping.
The schematic diagram of a kind of data processing equipment that Fig. 5 provides for embodiments of the invention, this device comprises:
This device embodiment is by the processing procedure of disparate modules, makes that the code word after at least 2 modulation is mapped on a plurality of transport layers of mimo system equably, can improve follow-up space diversity gain when carrying out transfer of data.
In a kind of application scenarios, when number of plies M was equal with virtual code word number N, then described mapping block 52 specifically was used for described N virtual code word is mapped to described M layer respectively.
In another kind of application scenarios, as number of plies M during greater than virtual code word number N and less than 2N, then described mapping block 52 specifically is used for M-N virtual code word is mapped in the individual layer of 2 (M-N), make each the virtual code word in described M-N the virtual code word be mapped to respectively on 2 layers, all the other 2N-M virtual code words are mapped in respectively on other (2N-M) individual layer
Further, described device also can comprise:
Processing module is used to described result at each layer to increase Cyclic Prefix and carries out upconversion process, obtains the data to be sent at each layer;
Sending module is used to send described data to be sent.
Described device can include but not limited to base station and terminal equipment, and the terminal equipment the most frequently used a kind of application form that is this device.Described terminal equipment can improve the space diversity gain of data upstream transmission to the base station uplink transmission data by the structure that adopts present embodiment.
One of ordinary skill in the art will appreciate that all or part of flow process among the said method embodiment, can instruct related hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
The above only is several embodiments of the present invention, and those skilled in the art can carry out various changes or modification to the present invention according to the disclosed content of application documents and not break away from the spirit and scope of the present invention.
Claims (10)
1. a data processing method is characterized in that, comprising:
Code word after N the modulation is carried out interleaving treatment, obtain N virtual code word, each virtual code word that the feasible back that interweaves generates comprises the partial data of the code word after each modulation;
The N that obtains virtual code word is mapped on M layer, and wherein N is the integer more than or equal to 2, and M is more than or equal to N and less than the integer of 2N;
The data that are mapped on the different layers are carried out discrete Fourier transform and inverse fast Fourier transform respectively, obtain result at each layer.
2. the method for claim 1 is characterized in that, described N the virtual code word that obtains is mapped on M the layer comprises: when number of plies M is equal with virtual code word number N, described N virtual code word is mapped to respectively on described M the layer.
3. the method for claim 1, it is characterized in that, the described N that obtains virtual code word is mapped on M layer comprises: as number of plies M during greater than virtual code word number N and less than 2N, M-N virtual code word is mapped on 2M-2N the layer, makes that each the virtual code word in described M-N the virtual code word is mapped to respectively on 2 layers; All the other 2N-M virtual code words are mapped in respectively on other 2N-M the layer.
4. method as claimed in claim 3 is characterized in that, described N=2, described M=3.
5. as each described method of claim 1-4, it is characterized in that, also comprise:
For described result at each layer increases Cyclic Prefix and carries out upconversion process, obtain data to be sent at each layer;
Send described data to be sent.
6. one kind data processing equipment is characterized in that, comprising:
Interleaving block is used for the code word after N the modulation is carried out interleaving treatment, obtains N virtual code word, and each virtual code word that the feasible back that interweaves generates comprises the partial data of the code word after each modulation;
Mapping block is used for the N that will obtain virtual code word and is mapped to M layer, and wherein N is the integer more than or equal to 2, and M is more than or equal to N and less than the integer of 2N;
Generation module is used for the data that are mapped on the different layers are carried out discrete Fourier transform and inverse fast Fourier transform respectively, obtains the result at each layer.
7. device as claimed in claim 6 is characterized in that, when number of plies M was equal with virtual code word number N, then described mapping block specifically was used for described N virtual code word is mapped to described M layer respectively.
8. device as claimed in claim 6, it is characterized in that, as number of plies M during greater than virtual code word number N and less than 2N, then described mapping block specifically is used for M-N virtual code word is mapped in 2M-2N layer, make each the virtual code word in described M-N the virtual code word be mapped to respectively on 2 layers, all the other 2N-M virtual code words are mapped in respectively on other 2N-M the layer.
9. device as claimed in claim 6 is characterized in that, also comprises:
Processing module is used to described result at each layer to increase Cyclic Prefix and carries out upconversion process, obtains the data to be sent at each layer;
Sending module is used to send described data to be sent.
10. as each described device among the claim 6-9, it is characterized in that described device is a terminal equipment.
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| CN103297105A (en) * | 2012-02-27 | 2013-09-11 | 上海贝尔股份有限公司 | Multi-antenna transmission method and device |
| CN105207702A (en) * | 2010-08-13 | 2015-12-30 | 松下电器（美国）知识产权公司 | Terminal Device, Base Station Device, Retransmission Method, And Resource Allocation Method |
| WO2016011598A1 (en) * | 2014-07-22 | 2016-01-28 | 华为技术有限公司 | Interlaced transmission method, sending device, receiving device and system |
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Application publication date: 20110511 |