CN102904694A - Method and device for codebook feedback - Google Patents

Method and device for codebook feedback Download PDF

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Publication number
CN102904694A
CN102904694A CN2011102128097A CN201110212809A CN102904694A CN 102904694 A CN102904694 A CN 102904694A CN 2011102128097 A CN2011102128097 A CN 2011102128097A CN 201110212809 A CN201110212809 A CN 201110212809A CN 102904694 A CN102904694 A CN 102904694A
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Prior art keywords
code book
code
code word
sequence number
time
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Chinese (zh)
Inventor
王加庆
闫志刚
鲍东山
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Beijing Nufront Mobile Multimedia Technology Co Ltd
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Beijing Nufront Wireless Technology Co Ltd
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Abstract

The invention discloses a novel method and device for codebook feedback. On the premise that the memory capacities of a receiving side and a transmitting side are reduced, not only is the better performance obtained, but also the feedback overhead is reduced.

Description

Code book feedback method and device
 
Technical field
The invention belongs to the communication technology, relate in particular to code book feedback method and device.
 
Background technology
In closed loop multiple-input and multiple-output (MIMO) communication system, receiving terminal feeds back to transmitting terminal with channel condition information (CSI), and transmitting terminal carries out the operations such as precoding, wave beam forming or day line options.Above-mentioned precoding refers to that mainly transmitting terminal is by pre-coding matrix modulation MIMO transmitted signal, thereby adjust flexibly the quantity of parallel flow according to the mimo channel condition, and with concentration of energy on specific direction, effectively overcome actual ill channel to the impact of systematic function, improve the robustness of spatial reuse, obtained best MIMO laser propagation effect.
The feedback of closed-loop MIMO can be divided into unity feedback and partial feedback again, and unity feedback is that whole CSI is fed back to transmitting terminal, after transmitting terminal is known current channel characteristics accurately, can utilize the technology such as precoding greatly to improve throughput of system.Although the unity feedback excellent performance, based on feedback link will take very large overhead.Another compromise scheme is partial feedback, i.e. the channel information of feedback quantization.What partial feedback fed back the earliest is the quantized channel matrix, but the pre-coding matrix of feedback quantization has lower overhead in fact, and has a pre-coding matrix of orthogonality constraint, can be designed to code book, receiving terminal only need get final product by the sequence number in the feedback channel feedback code book of low speed, greatly reduces receiving terminal feedack amount.
Based on the feedback system of code book, be the statistical property according to channel, design one group of available pre-coding matrix, consist of a code book, receiving terminal and transmitting terminal be known this code book all.When every secondary channel was realized, receiving terminal was selected a code word of mating most with channel according to channel matrix and the certain performance criteria estimated from code book, and then the sequence number with code word feeds back to transmitting terminal.Transmitting terminal is found out corresponding code word according to the sequence number of the code word of receiving terminal transmission from code book.Then, transmitting terminal can use the code word of finding out to realize precoding.
 
Summary of the invention
The purpose of this invention is to provide new code book feedback method and device, under the prerequisite of the memory space that reduces receiving terminal and transmitting terminal, obtain better performance, and reduce feedback overhead.For there is a basic understanding some aspects to the embodiment that discloses, the below has provided simple summary.This summary part is not to comment general, neither determine the key/critical component or describe the protection range of these embodiment.Its sole purpose is to present some concepts with simple form, with this preamble as following detailed description.
Technical scheme of the present invention is achieved in that
A kind of code book feedback method, the method comprises:
Receiving terminal is selected the code word with channel matched from the code book of storage;
Receiving terminal sends to transmitting terminal with the sequence number of the code word selected, utilizes described sequence number to extract code word with channel matched from the code book identical with described receiving terminal of this locality storage for transmitting terminal.
Optionally, described code book is
Figure 2011102128097100002DEST_PATH_IMAGE001
, code word wherein
Figure 810160DEST_PATH_IMAGE002
, the sequence number of code word
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, B is the bit number of code book;
Described
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For
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The non-DFT row quadrature complex matrix of dimension, wherein Be the transmitting terminal antenna number,
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Be the space fluxion;
Described
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, vector wherein
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A kind of code book feedback method, the method comprises:
The code book of receiving terminal utilization storage generates the factor and generates code book;
Receiving terminal is selected the code word with channel matched from the code book that generates;
Receiving terminal sends to transmitting terminal with the sequence number of the code word selected, utilizes described sequence number to generate the code word of extracting the code book that the factor generates with channel matched from the code book identical with described receiving terminal of local storage for transmitting terminal.
Optionally, described code book generates the factor and comprises:
Figure 751385DEST_PATH_IMAGE005
The non-DFT row quadrature complex matrix of dimension
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With
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The diagonal matrix of dimension , wherein
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Be the transmitting terminal antenna number,
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Be the space fluxion;
Described
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, vector wherein
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The code book of described generation is
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, code word wherein , the sequence number of code word
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, B is the bit number of code book.
Optionally, described
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In each component be 1 ,-1, i or-multiple of i.
Optionally, described
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In each component be real number less than or equal to 5 bits.
Optionally, when
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,
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, and
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The time, described
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, described
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Optionally, when ,
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, and
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The time, described
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, described
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Optionally, when
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,
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, and
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The time, described
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, described
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Optionally, when
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,
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, and
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The time, described
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, described
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Optionally, when
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, , and
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The time, described
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, described
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Optionally, when
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,
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, and
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The time, described
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, described
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, , and The time, described
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Described
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,
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, and
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The time, described
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Described
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Optionally, when
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, , and The time, described
Described
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Optionally, when
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,
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, and
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The time, described
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Described
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A kind of receiving end device of code book feedback, this device comprises:
Memory cell is used for the storage code book identical with transmitting terminal;
The codeword selection unit is used for from the code book selection of described cell stores and the code word of channel matched;
The sequence number transmitting element, the sequence number that is used for code word that described codeword selection unit is selected sends to transmitting terminal.
A kind of receiving end device of code book feedback, this device comprises:
Memory cell is used for the storage code book identical with transmitting terminal and generates the factor;
Generation unit is used for utilizing the code book of described cell stores to generate factor generation code book;
The codeword selection unit is used for from the code book selection of described generation unit generation and the code word of channel matched;
The sequence number transmitting element, the sequence number that is used for code word that described codeword selection unit is selected sends to transmitting terminal.
A kind of transmitting terminal device of code book feedback, this device comprises:
Memory cell is used for the storage code book identical with receiving terminal;
The sequence number receiving element be used for to receive the receiving terminal sequence number with code word channel matched that send;
The code word extraction unit is used for utilizing described sequence number from the code book extraction of described cell stores and the code word of channel matched.
A kind of transmitting terminal device of code book feedback, this device comprises:
Memory cell is used for the storage code book identical with receiving terminal and generates the factor;
Generation unit is used for utilizing the code book of described cell stores to generate factor generation code book;
The sequence number receiving element be used for to receive the receiving terminal sequence number with code word current channel matched that send;
The code word extraction unit is used for utilizing described sequence number from the code book extraction of described generation unit generation and the code word of channel matched.
Optionally, described code book is
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, code word wherein
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, the sequence number of code word
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, B is the bit number of code book;
Described
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For The non-DFT row quadrature complex matrix of dimension, wherein
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Be the transmitting terminal antenna number,
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Be the space fluxion;
Described
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, and vector wherein
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Optionally, described code book generates the factor and comprises:
Figure 26334DEST_PATH_IMAGE005
The non-DFT row quadrature complex matrix of dimension
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With
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The diagonal matrix of dimension
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, wherein Be the transmitting terminal antenna number,
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Be the space fluxion;
Described
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, and vector wherein
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The code book of described generation is
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, code word wherein
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, the sequence number of code word , B is the bit number of code book.
Optionally, described
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In each component be 1 ,-1, i or-multiple of i.
Optionally, described
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In each component be real number less than or equal to 5 bits.
Optionally, when
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, , and
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The time, described
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, described
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Optionally, when ,
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, and
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The time, described
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, described
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Optionally, when
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,
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, and
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The time, described , described
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Optionally, when
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, , and The time, described , described
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Optionally, when
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, , and
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The time, described
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, described
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Optionally, when
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,
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, and
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The time, described
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, described
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Optionally, when
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,
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, and
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The time, described
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Described
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Optionally, when
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,
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, and
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The time, described
Described
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Optionally, when
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,
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, and The time, described
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Described
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Optionally, when
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,
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, and
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The time, described
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Described
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For above-mentioned and relevant purpose, one or more embodiment comprise the feature that the back will describe in detail and particularly point out in the claims.Below explanation and accompanying drawing describe some illustrative aspects in detail, and its indication only is some modes in the utilizable variety of way of principle of each embodiment.Other benefit and novel features will consider by reference to the accompanying drawings and become obviously along with following detailed description, and the disclosed embodiments are to comprise being equal to of all these aspects and they.
 
Figure of description
Fig. 1 is the flow chart of the first code book feedback method of the present invention;
Fig. 2 is the flow chart of the second code book feedback method of the present invention;
Fig. 3 and Fig. 4 are the throughput performance simulation result schematic diagram of code book corresponding to two groups of parameters in the embodiment of the invention;
Fig. 5 to Fig. 7 is the throughput performance simulation result schematic diagram of respectively organizing code book corresponding to parameter in the embodiment of the invention;
Fig. 8 is the structural representation of the receiving end device of the first code book feedback of the present invention;
Fig. 9 is the structural representation of the receiving end device of the second code book feedback of the present invention;
Figure 10 is the structural representation of the transmitting terminal device of the first code book feedback of the present invention;
Figure 11 is the structural representation of the transmitting terminal device of the second code book feedback of the present invention.
 
Embodiment
The following description and drawings illustrate specific embodiments of the present invention fully, to enable those skilled in the art to put into practice them.Other embodiments can comprise structure, logic, electric, process and other change.Embodiment only represents possible variation.Unless explicitly call for, otherwise independent assembly and function are optional, and the order of operation can change.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.The scope of embodiment of the present invention comprises the gamut of claims, and all obtainable equivalents of claims.In this article, these embodiments of the present invention can be represented with term " invention " individually or always, this only is for convenient, and if in fact disclose and surpass one invention, not that the scope that will automatically limit this application is any single invention or inventive concept.
Fig. 1 is the flow chart of the first code book feedback method among the present invention, and this flow process comprises:
Step 11: receiving terminal is selected the code word with channel matched from the code book of storage.
Step 12: receiving terminal sends to transmitting terminal with the sequence number of the code word selected, utilizes described sequence number to extract code word with channel matched from the code book identical with described receiving terminal of this locality storage for transmitting terminal.
In the first code book feedback method in the present invention, code book is
Figure 564258DEST_PATH_IMAGE001
, code word wherein
Figure 281678DEST_PATH_IMAGE002
, the sequence number of code word
Figure 676888DEST_PATH_IMAGE003
,
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Bit number for code book.
Above-mentioned
Figure 428943DEST_PATH_IMAGE004
For
Figure 251406DEST_PATH_IMAGE005
The non-DFT row quadrature complex matrix of dimension,
Figure 456122DEST_PATH_IMAGE006
Be the transmitting terminal antenna number,
Figure 655022DEST_PATH_IMAGE007
Be the space fluxion.
Above-mentioned
Figure 261584DEST_PATH_IMAGE008
, and vector wherein
Fig. 2 is the flow chart of the second code book feedback method of the present invention, and this flow process comprises:
Step 21: the code book of receiving terminal utilization storage generates the factor and generates code book.
Step 22: receiving terminal is selected the code word with channel matched from the code book that generates.
Step 23: receiving terminal sends to transmitting terminal with the sequence number of the code word selected, utilizes described sequence number to generate the code word of extracting the code book that the factor generates with channel matched from the code book identical with described receiving terminal of local storage for transmitting terminal.
In the second code book feedback method in the present invention, code book generates the factor and comprises:
Figure 946960DEST_PATH_IMAGE005
The non-DFT row quadrature complex matrix of dimension
Figure 949551DEST_PATH_IMAGE004
With
Figure 410620DEST_PATH_IMAGE010
The diagonal matrix of dimension
Figure 574885DEST_PATH_IMAGE011
Wherein,
Figure 754193DEST_PATH_IMAGE006
Be the transmitting terminal antenna number,
Figure 294896DEST_PATH_IMAGE007
Be the space fluxion.
Above-mentioned
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, and vector wherein
Figure 211217DEST_PATH_IMAGE009
The code book that generates is expressed as
Figure 674559DEST_PATH_IMAGE001
, code word wherein
Figure 956636DEST_PATH_IMAGE002
, the sequence number of code word
Figure 189034DEST_PATH_IMAGE003
,
Figure 960681DEST_PATH_IMAGE041
Bit number for code book.
In two kinds of code book feedback methods of the present invention, each code word in the code book is a pre-coding matrix.
In two kinds of code book feedback methods of the present invention,
Figure 849002DEST_PATH_IMAGE004
In each component can be for 1 ,-1, i or-multiple of i, above-mentioned In each component can be the real number less than or equal to 5 bits.
In two kinds of code book feedback methods of the present invention, receiving terminal can be picked out the code word of mating most with the channel matrix H of current channel according to certain criterion from code book, and the sequence number of code word is sent to transmitting terminal.Selection criterion has a variety of, take the maximum capacity criterion as example, so that the code word of throughput of system maximum is passed through formula
Figure 21675DEST_PATH_IMAGE042
Obtain, wherein, Unit matrix,
Figure 901906DEST_PATH_IMAGE044
Be transmitting power,
Figure DEST_PATH_IMAGE045
Be channel matrix.
Suppose to pass through calculative determination
Figure 339841DEST_PATH_IMAGE046
, receiving terminal can be with sequence number
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Send to transmitting terminal.
The method that the transmitting terminal utilization is tabled look-up is obtained from known codebook
Transmitting terminal can utilize the code word that finds to carry out precoding, namely according to formula
Figure 108394DEST_PATH_IMAGE048
To transmission vector
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Carry out precoding.Then transmitting terminal can send to receiving terminal with the data after the precoding.
The below provides the optional embodiment of code book feedback method of the present invention.
In the present embodiment, list
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,
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And Asynchronous ten groups of values
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With
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The first:
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,
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,
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；
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。
The second:
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,
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,
；
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。
The third:
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,
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,
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；
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。
The 4th kind:
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,
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,
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；
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。
The 5th kind:
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,
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,
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；
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。
The 6th kind: ,
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,
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；
。
The 7th kind:
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,
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,
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；
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。
The 8th kind:
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,
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,
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；
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。
The 9th kind:
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,
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,
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；
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。
The tenth kind:
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,
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,
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；
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。
What at present known performance was best is the Grassmann code book.Take 6 bit Grassmann code books the transmitting terminal antenna number as 4 and spatial flow as 2 o'clock as example, this moment, the Grassmann code book was by 64
Figure 939275DEST_PATH_IMAGE052
The multiple row orthogonal matrix of dimension consists of, and real part and the imaginary part of 8 elements of each matrix are floating point real numbers, and do not have association between 64 matrixes, so for this code book, receiving terminal and transmitting terminal all need storage
Figure DEST_PATH_IMAGE053
Individual floating point real number.Same, take the transmitting terminal antenna number as 4 and spatial flow as 2 o'clock as example, in this moment present embodiment
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Comprise 8 plural numbers, its real part and imaginary part are 1 ,-1, i or-multiple of i, vector
Figure 146582DEST_PATH_IMAGE012
In each component be the real number that mostly is 5 bits most.
Can find out, on the one hand, present embodiment based on
Figure 34904DEST_PATH_IMAGE004
With
Figure 917409DEST_PATH_IMAGE012
This structure, no matter take the first or the second data transmission method, the memory space of receiving terminal and transmitting terminal all will reduce greatly.On the other hand, because in the present embodiment
Figure 207576DEST_PATH_IMAGE004
With
Figure 150125DEST_PATH_IMAGE012
Simple in structure, the search complexity of code book is also more a lot of than Grassmann code book.
Below by emulation, take the transmitting terminal antenna number as 4 and spatial flow as 1 and 2 as example, relatively in the present embodiment With
Figure 946359DEST_PATH_IMAGE012
The performance of the Grassmann code book that the performance of corresponding code book and at present known performance are best.
The emulation here is take throughput performance as example.
Fig. 3 and Fig. 4 are respectively the simulation result schematic diagram in the embodiment of the invention, wherein ordinate represents throughput, abscissa represents signal to noise ratio, the desirable CSI unity feedback of " perfect CSI " expression in the diagram, " 6bits Grassmann codebook " represents 6 bit Grassmann code books, 6 bit code books in " 6bits codebook " expression present embodiment.
As shown in Figure 3, transmitting antenna be 4 and the space fluxion be 1 o'clock, the throughput performance of 6 bit code books is almost completely the same with the throughput performance of the Grassmann code book of 6 bits in the present embodiment, and compares with the throughput performance of desirable CSI unity feedback, and performance loss can be accepted.
As shown in Figure 4, transmitting antenna be 4 and the space fluxion be 2 o'clock, the throughput performance of 6 bit code books is almost completely the same with the throughput performance of the Grassmann code book of 6 bits in the present embodiment, and compares with the throughput performance of desirable CSI unity feedback, and performance loss can be accepted.
Can draw in the present embodiment other eight groups by similar emulation
Figure 418929DEST_PATH_IMAGE004
With
Figure 470062DEST_PATH_IMAGE012
The throughput performance of corresponding code book, similar with the throughput performance of Grassmann code book in corresponding number of transmit antennas and space fluxion situation of above-mentioned 6 bits, and compare with the throughput performance of desirable CSI unity feedback, performance loss also can be accepted.
Fig. 5 to Fig. 7 is each group in the present embodiment
Figure 395292DEST_PATH_IMAGE004
With
Figure 557283DEST_PATH_IMAGE012
The throughput performance simulation result schematic diagram of corresponding code book.Wherein " 6bits codebook " represents 6 bit code books in the present embodiment, and the numeral in the bracket represents respectively number of transmit antennas and the space fluxion that this 6 bit code book is corresponding.
Fig. 8 is the structural representation of the receiving end device of the first code book feedback of the present invention, and this device comprises: memory cell 81, codeword selection unit 82 and sequence number transmitting element 83.
Described memory cell 81 is used for the storage code book identical with transmitting terminal.
Described codeword selection unit 82 is used for from the code book selection of described memory cell 81 storages and the code word of channel matched.
Described sequence number transmitting element 83, the sequence number that is used for code word that described codeword selection unit 82 is selected sends to transmitting terminal.The sequence number that the transmitting terminal utilization receives can be extracted the code word with channel matched from the code book identical with receiving terminal of this locality storage.
Fig. 9 is the structural representation of the receiving end device of the second code book feedback of the present invention, and this device comprises: memory cell 91, generation unit 92, codeword selection unit 93 and sequence number transmitting element 94.
Said memory cells 91 is used for the storage code book identical with transmitting terminal and generates the factor.
Above-mentioned generation unit 92 is used for utilizing the code book of described memory cell 91 storages to generate factor generation code book.
Above-mentioned codeword selection unit 93 is used for from the code book selection of described generation unit 92 generations and the code word of channel matched.
Described sequence number transmitting element 94, the sequence number that is used for code word that described codeword selection unit 93 is selected sends to transmitting terminal.The sequence number that the transmitting terminal utilization receives is extracted the code word with channel matched the code book that can generate from the code book generation factor identical with receiving terminal of using local storage.
Figure 10 is the structural representation of the transmitting terminal device of the first code book feedback of the present invention, and this device comprises: memory cell 101, code word extraction unit 102 and sequence number receiving element 103.
Described memory cell 101 is used for the storage code book identical with receiving terminal.
Described sequence number receiving element 102 be used for to receive the receiving terminal sequence number with code word channel matched that send.
Described code word extraction unit 103 is used for utilizing described sequence number from the code book extraction of described memory cell 101 storages and the code word of channel matched.
Figure 11 is the structural representation of the transmitting terminal device of the second code book feedback of the present invention, and this device comprises: memory cell 111, generation unit 112, code word extraction unit 113 and sequence number receiving element 114.
Described memory cell 111 is used for the storage code book identical with receiving terminal and generates the factor.
Described generation unit 112 is used for utilizing the code book of described memory cell 111 storages to generate factor generation code book.
Described sequence number receiving element 113 be used for to receive the receiving terminal sequence number with code word channel matched that send.
Described code word extraction unit 114 is used for utilizing described sequence number from the code book extraction of described generation unit 112 generations and the code word of channel matched.
In the transmitting terminal device of the receiving end device of the first code book of the present invention feedback and the first code book feedback, code book is
Figure 618780DEST_PATH_IMAGE001
, code word wherein
Figure 903131DEST_PATH_IMAGE002
, the sequence number of code word
Figure 253341DEST_PATH_IMAGE003
,
Figure 281340DEST_PATH_IMAGE041
Be the code book bit number.
Above-mentioned
Figure 400606DEST_PATH_IMAGE004
For
Figure 590279DEST_PATH_IMAGE005
The non-DFT row quadrature complex matrix of dimension,
Figure 427785DEST_PATH_IMAGE006
Be the transmitting terminal antenna number,
Figure 993895DEST_PATH_IMAGE007
Be the space fluxion.
Above-mentioned
Figure 233247DEST_PATH_IMAGE008
, and vector wherein
Figure 593821DEST_PATH_IMAGE009
In the transmitting terminal device of the receiving end device of the second code book of the present invention feedback and the second code book feedback, code book generates the factor and comprises:
Figure 930342DEST_PATH_IMAGE005
The non-DFT row quadrature complex matrix of dimension
Figure 300143DEST_PATH_IMAGE004
With
Figure 128422DEST_PATH_IMAGE010
The diagonal matrix of dimension
Figure 925476DEST_PATH_IMAGE011
,
Figure 534312DEST_PATH_IMAGE006
Be the transmitting terminal antenna number,
Figure 645488DEST_PATH_IMAGE007
Be the space fluxion.
Described
Figure 656169DEST_PATH_IMAGE008
, and vector wherein
Figure 561808DEST_PATH_IMAGE009
The code book that generates is
Figure 657940DEST_PATH_IMAGE001
, code word wherein , the sequence number of code word
Figure 172415DEST_PATH_IMAGE003
,
Figure 248956DEST_PATH_IMAGE041
Be the code book bit number.
In each code book feedback device of the present invention Each component can be for 1 ,-1, i or-multiple of i,
Figure 19783DEST_PATH_IMAGE012
Each component can be the real number less than or equal to 5 bits.
In the receiving end device of the first code book feedback among the present invention and the transmitting terminal device of the first code book feedback, the code book of storing is corresponding
Figure 5056DEST_PATH_IMAGE004
With
Figure 252498DEST_PATH_IMAGE012
The value embodiment that can provide for preamble the inventive method in ten kinds of situations enumerating.
In the receiving end device of the second code book feedback among the present invention and the transmitting terminal device of the second code book feedback, the code book of storing generates the factor, namely With
Figure 314312DEST_PATH_IMAGE012
The value embodiment that can provide for preamble the inventive method in ten kinds of situations enumerating.
Unless otherwise specific statement, term such as processing, calculating, computing, determine, show etc. that action and/or the process that can refer to one or more processing or computing system or similar devices, described action and/or process will be expressed as the data manipulation of the register for the treatment of system or the amount of the physics (such as electronics) in the memory and be converted into other data of the interior physical quantity of the memory, register or other this type of information storages, emission or the display device that are expressed as similarly treatment system.Information and signal can be with multiple different technology and any expressions the in the method.For example, data, instruction, order, information, signal, bit, symbol and the chip of mentioning in the description on run through can represent with voltage, electric current, electromagnetic wave, magnetic field or particle, light field or particle or its combination in any.
Should be understood that the particular order of the step in the disclosed process or the example that level is illustrative methods.Based on design preference, should be appreciated that the particular order of the step in the process or level can be rearranged in the situation that does not break away from protection range of the present disclosure.Appended claim to a method has provided the key element of various steps with exemplary order, and is not to be limited to described particular order or level.
In above-mentioned detailed description, various features are combined in the single embodiment together, to simplify the disclosure.This open method should be interpreted as reflecting such intention, that is, the embodiment of theme required for protection need to be than the more feature of the feature of clearly stating in each claim.On the contrary, as appending claims reflected, the present invention was in the state that lacks than whole features of disclosed single embodiment.Therefore, appending claims clearly is merged in the detailed description hereby, and wherein every claim is alone as the independent preferred embodiment of the present invention.
Those skilled in the art it is also understood that various illustrative box, module, circuit and the algorithm steps in conjunction with the embodiment description of this paper all can be embodied as electronic hardware, computer software or its combination.For the interchangeability between the hardware and software clearly is described, the above has all carried out usually describing around its function to various illustrative parts, frame, module, circuit and step.Be embodied as hardware or be embodied as software as for this function, depend on specific application and the design constraint that whole system is applied.Those skilled in the art can be for each application-specific, realizes described function in the mode of accommodation, and still, this realization decision-making should not be construed as and deviates from protection range of the present disclosure.
Be used for carrying out general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components or its combination in any of the described function of the application, can realize or carry out in conjunction with the described various illustrative logic diagrams of the embodiment of this paper, module and circuit.General processor can be microprocessor, and perhaps, this processor also can be processor, controller, microcontroller or the state machine of any routine.Processor also may be embodied as the combination of computing equipment, for example, and the combination of the combination of DSP and microprocessor, multi-microprocessor, one or more microprocessor and DSP kernel, perhaps any other this kind structure.
Software module or its combination that can directly be presented as hardware, be carried out by processor in conjunction with the step of the described method of the embodiment of this paper or algorithm.Software module can be arranged in the storage medium of RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, mobile disk, CD-ROM or any other form well known in the art.A kind of exemplary storage medium is connected to processor, thereby makes the processor can be from this read information, and can be to this storage medium writing information.Certainly, storage medium also can be the part of processor.Processor and storage medium can be arranged in ASIC.This ASIC can be arranged in user terminal.Certainly, processor and storage medium also can be used as discrete assembly and are present in the user terminal.
For making any technical staff in this area realize or to use the present invention, the above is described disclosed embodiment.To those skilled in the art; The various alter modes of these embodiment all are apparent, and the General Principle of this paper definition also can be applicable to other embodiment on the basis that does not break away from spirit of the present disclosure and protection range.Therefore, the disclosure is not limited to the embodiment that this paper provides, but consistent with the widest scope of the disclosed principle of the application and novel features.
Realize that for software the technology of describing among the application can realize with the module (for example, process, function etc.) of carrying out the described function of the application.These software codes can be stored in memory cell and be carried out by processor.Memory cell can be implemented in the processor, also can be implemented in outside the processor, and under latter event, it is coupled to processor by correspondence via various means, and these all are well known in the art.
And various aspects as herein described or feature can be used as the programming of Application standard and/or method, device or the goods of engineering are realized.Term as used herein " goods " is to comprise the computer program that can visit from any computer-readable equipment, carrier wave or medium.For example, computer-readable medium (for example can include but not limited to magnetic storage apparatus, hard disk, floppy disk, tape etc.), CD (for example, compact discs (CD), digital versatile disc (DVD) etc.), smart card and flash memory device (for example, EPROM, card, rod, key actuated device etc.).In addition, various storage medium described herein is expressed as one or more equipment and/or other machine readable media for storage information.Term " machine readable media " includes but not limited to can store, comprise and/or carry wireless channel and various other medium of instruction and/or data.
Description above comprises giving an example of one or more embodiment.Certainly, all possible combination of describing parts or method in order to describe above-described embodiment is impossible, but those of ordinary skills should be realized that each embodiment can do further combinations and permutations.Therefore, the embodiment that describes herein is intended to contain all the such changes, modifications and variations in the protection range that falls into appended claims.In addition, " comprise " with regard to the term that uses in specification or claims, the mode that contains of this word is similar to term and " comprises ", just as " comprising, " in the claims as link word explain like that.In addition, using any one term " perhaps " in the specification of claims is to represent " non-exclusionism or ".

Claims (34)

1. code book feedback method is characterized in that the method comprises:
Receiving terminal is selected the code word with channel matched from the code book of storage;
Receiving terminal sends to transmitting terminal with the sequence number of the code word selected, utilizes described sequence number to extract code word with channel matched from the code book identical with described receiving terminal of this locality storage for transmitting terminal.
2. the method for claim 1 is characterized in that, described code book is
Figure 529691DEST_PATH_IMAGE001
, code word wherein , the sequence number of code word
Figure 582278DEST_PATH_IMAGE003
, B is the bit number of code book;
Described For
Figure 288514DEST_PATH_IMAGE005
The non-DFT row quadrature complex matrix of dimension, wherein
Figure 769174DEST_PATH_IMAGE006
Be the transmitting terminal antenna number,
Figure 264877DEST_PATH_IMAGE007
Be the space fluxion;
Described , vector wherein
3. code book feedback method is characterized in that the method comprises:
The code book of receiving terminal utilization storage generates the factor and generates code book;
Receiving terminal is selected the code word with channel matched from the code book that generates;
Receiving terminal sends to transmitting terminal with the sequence number of the code word selected, utilizes described sequence number to generate the code word of extracting the code book that the factor generates with channel matched from the code book identical with described receiving terminal of local storage for transmitting terminal.
4. method as claimed in claim 3 is characterized in that, described code book generates the factor and comprises:
Figure 405506DEST_PATH_IMAGE005
The non-DFT row quadrature complex matrix of dimension
Figure 122926DEST_PATH_IMAGE004
With
Figure 455818DEST_PATH_IMAGE010
The diagonal matrix of dimension
Figure 270191DEST_PATH_IMAGE011
, wherein
Figure 30336DEST_PATH_IMAGE006
Be the transmitting terminal antenna number,
Figure 297370DEST_PATH_IMAGE007
Be the space fluxion;
Described , vector wherein
The code book of described generation is
Figure 33878DEST_PATH_IMAGE001
, code word wherein
Figure 725891DEST_PATH_IMAGE002
, the sequence number of code word , B is the bit number of code book.
5. such as claim 2 or 4 described methods, it is characterized in that, described
Figure 189550DEST_PATH_IMAGE004
In each component be 1 ,-1, i or-multiple of i.
6. such as claim 2 or 4 described methods, it is characterized in that, described
Figure 353815DEST_PATH_IMAGE012
In each component be real number less than or equal to 5 bits.
7. such as claim 2 or 4 described methods, it is characterized in that, when ,
Figure 73827DEST_PATH_IMAGE014
, and
Figure 389402DEST_PATH_IMAGE015
The time, described
Figure 990147DEST_PATH_IMAGE016
, described
Figure 391173DEST_PATH_IMAGE017
8. such as claim 2 or 4 described methods, it is characterized in that, when
Figure 735566DEST_PATH_IMAGE013
,
Figure 905648DEST_PATH_IMAGE018
, and The time, described
Figure 565616DEST_PATH_IMAGE019
, described
Figure 385805DEST_PATH_IMAGE020
9. such as claim 2 or 4 described methods, it is characterized in that, when
Figure 738289DEST_PATH_IMAGE021
,
Figure 618520DEST_PATH_IMAGE014
, and
Figure 56454DEST_PATH_IMAGE015
The time, described
Figure 680334DEST_PATH_IMAGE022
, described
Figure 887324DEST_PATH_IMAGE023
10. such as claim 2 or 4 described methods, it is characterized in that, when
Figure 938457DEST_PATH_IMAGE021
,
Figure 863688DEST_PATH_IMAGE018
, and
Figure 25679DEST_PATH_IMAGE015
The time, described
Figure 352755DEST_PATH_IMAGE024
, described
Figure 309209DEST_PATH_IMAGE025
11. such as claim 2 or 4 described methods, it is characterized in that, when
Figure 721736DEST_PATH_IMAGE021
,
Figure 687418DEST_PATH_IMAGE026
, and
Figure 869001DEST_PATH_IMAGE015
The time, described , described
12. such as claim 2 or 4 described methods, it is characterized in that, when ,
Figure 701642DEST_PATH_IMAGE029
, and
Figure 265478DEST_PATH_IMAGE015
The time, described
Figure 387018DEST_PATH_IMAGE030
, described
Figure 756819DEST_PATH_IMAGE031
13. such as claim 2 or 4 described methods, it is characterized in that, when
Figure 850677DEST_PATH_IMAGE032
,
Figure 647732DEST_PATH_IMAGE014
, and
Figure 205970DEST_PATH_IMAGE015
The time, described
Figure 113883DEST_PATH_IMAGE033
Described
Figure 62247DEST_PATH_IMAGE034
14. such as claim 2 or 4 described methods, it is characterized in that, when
Figure 30203DEST_PATH_IMAGE032
,
Figure 64019DEST_PATH_IMAGE018
, and
Figure 775623DEST_PATH_IMAGE015
The time, described
Figure 640810DEST_PATH_IMAGE035
Described
Figure 717351DEST_PATH_IMAGE036
15. such as claim 2 or 4 described methods, it is characterized in that, when ,
Figure 753757DEST_PATH_IMAGE026
, and
Figure 473451DEST_PATH_IMAGE015
The time, described
Figure 720893DEST_PATH_IMAGE037
Described
Figure 791617DEST_PATH_IMAGE038
16. such as claim 2 or 4 described methods, it is characterized in that, when
Figure 782707DEST_PATH_IMAGE032
,
Figure 497853DEST_PATH_IMAGE029
, and
Figure 916196DEST_PATH_IMAGE015
The time, described
Figure 474217DEST_PATH_IMAGE039
Described
Figure 65735DEST_PATH_IMAGE040
17. the receiving end device of a code book feedback is characterized in that this device comprises:
Memory cell is used for the storage code book identical with transmitting terminal;
The codeword selection unit is used for from the code book selection of described cell stores and the code word of channel matched;
The sequence number transmitting element, the sequence number that is used for code word that described codeword selection unit is selected sends to transmitting terminal.
18. the receiving end device of a code book feedback is characterized in that this device comprises:
Memory cell is used for the storage code book identical with transmitting terminal and generates the factor;
Generation unit is used for utilizing the code book of described cell stores to generate factor generation code book;
The codeword selection unit is used for from the code book selection of described generation unit generation and the code word of channel matched;
The sequence number transmitting element, the sequence number that is used for code word that described codeword selection unit is selected sends to transmitting terminal.
19. the transmitting terminal device of a code book feedback is characterized in that this device comprises:
Memory cell is used for the storage code book identical with receiving terminal;
The sequence number receiving element be used for to receive the receiving terminal sequence number with code word channel matched that send;
The code word extraction unit is used for utilizing described sequence number from the code book extraction of described cell stores and the code word of channel matched.
20. the transmitting terminal device of a code book feedback is characterized in that this device comprises:
Memory cell is used for the storage code book identical with receiving terminal and generates the factor;
Generation unit is used for utilizing the code book of described cell stores to generate factor generation code book;
The sequence number receiving element be used for to receive the receiving terminal sequence number with code word current channel matched that send;
The code word extraction unit is used for utilizing described sequence number from the code book extraction of described generation unit generation and the code word of channel matched.
21. such as claim 17 or 19 described devices, it is characterized in that described code book is
Figure 697704DEST_PATH_IMAGE001
, code word wherein
Figure 614845DEST_PATH_IMAGE002
, the sequence number of code word , B is the bit number of code book;
Described
Figure 727474DEST_PATH_IMAGE004
For
Figure 479530DEST_PATH_IMAGE005
The non-DFT row quadrature complex matrix of dimension, wherein
Figure 301992DEST_PATH_IMAGE006
Be the transmitting terminal antenna number,
Figure 506709DEST_PATH_IMAGE007
Be the space fluxion;
Described , and vector wherein
Figure 312171DEST_PATH_IMAGE009
22., it is characterized in that described code book generates the factor and comprises such as claim 18 or 20 described devices:
Figure 305534DEST_PATH_IMAGE005
The non-DFT row quadrature complex matrix of dimension
Figure 59864DEST_PATH_IMAGE004
With
Figure 734559DEST_PATH_IMAGE010
The diagonal matrix of dimension
Figure 257944DEST_PATH_IMAGE011
, wherein
Figure 625471DEST_PATH_IMAGE006
Be the transmitting terminal antenna number,
Figure 867097DEST_PATH_IMAGE007
Be the space fluxion;
Described
Figure 79904DEST_PATH_IMAGE008
, and vector wherein
Figure 723375DEST_PATH_IMAGE009
The code book of described generation is
Figure 996224DEST_PATH_IMAGE001
, code word wherein
Figure 725146DEST_PATH_IMAGE002
, the sequence number of code word
Figure 741643DEST_PATH_IMAGE003
, B is the bit number of code book.
23. such as claim 21 or 22 described devices, it is characterized in that, described In each component be 1 ,-1, i or-multiple of i.
24. such as claim 21 or 22 described devices, it is characterized in that, described
Figure 948951DEST_PATH_IMAGE012
In each component be real number less than or equal to 5 bits.
25. such as claim 21 or 22 described devices, it is characterized in that, when ,
Figure 782094DEST_PATH_IMAGE014
, and
Figure 72262DEST_PATH_IMAGE015
The time, described
Figure 14810DEST_PATH_IMAGE016
, described
26. such as claim 21 or 22 described devices, it is characterized in that, when ,
Figure 221297DEST_PATH_IMAGE018
, and
Figure 334747DEST_PATH_IMAGE015
The time, described
Figure 197661DEST_PATH_IMAGE019
, described
27. such as claim 21 or 22 described devices, it is characterized in that, when
Figure 421148DEST_PATH_IMAGE021
,
Figure 705499DEST_PATH_IMAGE014
, and
Figure 55709DEST_PATH_IMAGE015
The time, described , described
Figure 202974DEST_PATH_IMAGE023
28. such as claim 21 or 22 described devices, it is characterized in that, when
Figure 392647DEST_PATH_IMAGE021
, , and
Figure 796263DEST_PATH_IMAGE015
The time, described
Figure 35615DEST_PATH_IMAGE024
, described
Figure 396189DEST_PATH_IMAGE025
29. such as claim 21 or 22 described devices, it is characterized in that, when
Figure 720991DEST_PATH_IMAGE021
,
Figure 90792DEST_PATH_IMAGE026
, and
Figure 981388DEST_PATH_IMAGE015
The time, described
Figure 716126DEST_PATH_IMAGE027
, described
Figure 324962DEST_PATH_IMAGE028
30. such as claim 21 or 22 described devices, it is characterized in that, when
Figure 424418DEST_PATH_IMAGE021
, , and The time, described
Figure 436871DEST_PATH_IMAGE030
, described
31. such as claim 21 or 22 described devices, it is characterized in that, when
Figure 951346DEST_PATH_IMAGE032
,
Figure 90203DEST_PATH_IMAGE014
, and
Figure 611314DEST_PATH_IMAGE015
The time, described
Described
Figure 783987DEST_PATH_IMAGE034
32. such as claim 21 or 22 described devices, it is characterized in that, when
Figure 93745DEST_PATH_IMAGE032
,
Figure 102153DEST_PATH_IMAGE018
, and
Figure 155559DEST_PATH_IMAGE015
The time, described
Described
Figure 413682DEST_PATH_IMAGE036
33. such as claim 21 or 22 described devices, it is characterized in that, when ,
Figure 500904DEST_PATH_IMAGE026
, and The time, described
Figure 784435DEST_PATH_IMAGE037
Described
34. such as claim 21 or 22 described devices, it is characterized in that, when , , and
Figure 737162DEST_PATH_IMAGE015
The time, described
Described
Figure 140778DEST_PATH_IMAGE040
CN2011102128097A 2011-07-27 2011-07-27 Method and device for codebook feedback Pending CN102904694A (en)

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