CN102082593B - A kind of code book stores and uses information transceiving method and the device of this code book - Google Patents

Abstract

The invention discloses the storage of a kind of code book and use information transceiving method and the device of this code book, comprising determining that code book, codebook structure is:Wherein: Φ^rRepresent the matrix of 2 × r dimension, W_n ^rRepresent N_TThe matrix of/2 × r dimension, N_TBe launch antenna number, n is codeword number, and r is Rank number, operator o be:Wherein, A (:, n) n-th row of representing matrix A,Representing matrix direct product, if A (:, n) it is the vector of M × 1 dimension, thenStorage code book.The code book that the present invention provides can be matched with the channel distribution characteristic of dual polarized antenna, minimize the performance loss that codebook quantification brings, thus is effectively improved the performance of pre-coding system.

Description

A kind of code book stores and uses information transceiving method and the device of this code book

Technical field

The present invention relates to wireless communication technology, store and use the information transceiving method of this code book particularly to a kind of code book And device.

Background technology

MIMO (Multiple-Input Multiple-Output, multiple-input, multiple-output) system uses multiple transmittings, receives sky Line, utilize signal sky, time, frequency-domain combined process obtain speed, diversity and array gain.In mimo system, if emitter Channel information can be known in some way, it is possible to be optimized sending signal according to the characteristic of channel, receive matter to improve Measure and reduce the requirement to Receiver Complexity.The most typically use the feedback system of quantized channel information, with fall Low feedback overhead and feedback delay.The quantization of channel information can be for channel matrix and statistic thereof, it is also possible to be receiver The pretreatment parameter recommended.Channel information, after quantifying, is mapped in the set that limited element is constituted, this Collection is collectively referred to as code book.

In closed-loop MIMO system based on code book, signal that receiving terminal receiving end/sending end is sent and utilize FFT (Fast Fourier Transform, Fast Fourier Transform (FFT)) it is translated into frequency-region signal.These signals detect mould through MIMO again If block is divided into the signal distinguishing dried layer after coming.After solving layer and mapping, signal is the most demodulated, deinterleave reconciliation Code.The pilot signal received is transfused to channel estimation module device and estimates to realize channel.Receiving terminal utilizes the channel letter estimated Breath selects code word to optimize performance from code book.Its Optimality Criteria can be FER (Frame Error Rate, FER), BER (Signal to Interference plus Noise Ratio, believes dry making an uproar for (Bit Error Rate, bit error rate), SINR Than), mutual information, instantaneous throughput or other suitable criterions.Receiving terminal produces the index of selected code word for use in follow-up Transmitter sends.Receiving terminal produces CQI (Channel Quality Indicator, channel quality indicates) to inform transmitter Channel quality.Receiving terminal is additionally operable to determine Rank (order) number and the corresponding data number of plies, for follow-up data transmission.Above The all parameters obtained, code word label, CQI and Rank number all feed back to transmitting terminal.Transmitting terminal by multiple data streams to be sent, The MCS (Modulation Coding Scheme, Modulation and Coding Scheme) that application is chosen carries out corresponding Data Stream Processing.According to Codeword selection information, selects code word in the codebook.If each data stream will be mapped to that dried layer transmission speed required for realizing Rate.Then, based on selected pre-encoding codeword, the data after mapping layer carry out precoding.Finally, after each precoding Data stream is modulated through OFDM (Orthogonal Frequency Division Multiplexing, OFDM), Launch antenna through too much root to launch.

In closed-loop MIMO system based on code book, code book is the key affecting systematic function.Rel-8 (Release8, Version 8) LTE (Long Term Evolution, Long Term Evolution) transmission mode 4,5,6 in, all have employed PMI (Precode Matrix Index, pre-coding matrix index) feedback mechanism, i.e. UE (User Equipment, subscriber equipment) leads according to public Frequency measures channel, and reports the label information of its code word recommended to base station eNB.When public guide frequency port is 4, use base In the code book of Householder conversion (Householder Transformation, Householder transformation), empty for closed loop Between multiplexer mode i.e. every kind of Rank of transmission mode 4, all there are 16 optional pre-coding matrixes.

The key property of Rel-8LTE4 antenna codebook includes: 1) Rank1 code book is considering non-correlation channel and correlated channels Obtained by search under conditions of compromise；2) code book of other Rank keeps the nest relation with Rank1 code book；3) codebook element All use 8PSK (Phase Shift Keying, phase-shift keying (PSK)) element, to reduce computation complexity；4) possess permanent mould and You Te Property；5) characteristic that Householder can be utilized to convert reduces the complexity of codeword selection.

In the wireless communication system using MIMO technology, such as Rel-10 (Release10, version 10) LTE-A (Long Term Evolution-Advanced, Long Term Evolution is senior) in system, the mechanism of PMI feedback may be continued to use, but due to Launch the increase of antenna number, such as, may be 8, Rank with launch the configuration number of combinations of antenna port number far more than Rel- Situation under 8LTE.On the one hand, not yet define with the code book launching the configuration combination of antenna port number for a lot of Rank.Another Aspect, compares Rel-8LTE system, and the necessity for dual polarization multiaerial system design codebooks becomes more to highlight, its reason Being, number of antennas is continuously increased, and base station size is limited, inevitably needs to reduce antenna distance or/and use Poliarizing antenna.Based on considerations above, linear code book and method for designing thereof for dual polarization multiaerial system are following channel radios Must obligato technology point in communication system research and standardization.Additionally, in view of the superperformance of Rel-8LTE4 antenna codebook and excellent More characteristic, during codebook design, researcher considers to retain the characteristic of Rel-8LTE code book the most as much as possible.

Research shows, the method for Householder conversion is not directly applicable the design of 8 antenna codebooks.At present, comprise Rank3, Rank4 code book mainly has following several:

Code book 1: utilize complex Hadamard transform to construct with 4⁷Individual 8PSK element is 8 × 8 complex matrix of element, then leads to The method search crossing non-correlation channel and correlated channels compromise optimization obtains each Rank code book；

Code book 2: by the matrix of two group 4 × 4, pass through formula $F_{b,n}=\frac{1}{\sqrt{8R}}\left(\begin{array}{c}{A}_b(:,1:R)\\ A_b(:,1:R){\mathrm{\Λ}}_b(1:R:,1:R)\end{array}\right)$ Structure Produce the code book of Rank1-Rank4；

Code book 3: by 8DFT (Discrete Fourier Transform, discrete Fourier transform) matrix, 4DFT matrix, Diagonal matrix and ranks transition matrix construct the matrix of 48 × 8, then by combination and the column vector of these 48 × 8 matrixes Select constitute Rank1-Rank4 code book；

Code book 4: be multiplied by 8-DFT matrix with 16 different diagonal matrixs and obtain the code book of Rank8, and the code book of Rank-n by The front n row composition of these 16 complex matrix；

In such scheme, all there is certain defect:

Code book 1 inherits most of characteristic of Rel-8LTE4 antenna codebook: permanent mould, the tenth of the twelve Earthly Branches, Nested property, only with 8PSK Element, owing to code book 1 is 4⁷Search for code book in the space that individual 8 × 8 complex matrix with 8PSK element as element are constituted, and search for During not the characteristic of channel for dual polarization multiaerial system carry out special optimization, cause this code book many days of dual polarization Performance loss in wire system；

Code book 2 inherits most of characteristic of Rel-8LTE4 antenna codebook: permanent mould, the tenth of the twelve Earthly Branches, Nested property, only with 8PSK Element, but two group of 4 × 4 matrix constituting 8 antenna codebooks does not take into full account the characteristic of channel, especially at Rank3, Rank4 Lower performance has bigger loss.

Code book 3 constitutes the code book of 8 antennas by the combination of 48 × 8 matrixes and the selection of column vector, due to each Rank Using different matrix combinations, code book 3 entirety does not possess most of characteristic of Rel-8LTE4 antenna codebook, and at Rank3 Under, owing to not possessing characteristic at the tenth of the twelve Earthly Branches, performance has significantly loss.

Code book 4 inherits the part of properties of Rel-8LTE8 antenna codebook: permanent mould, the tenth of the twelve Earthly Branches, Nested property, but have employed 16PSK Element, therefore can increase the complexity that precoding calculates, if can not obtain significant performance gain compared with other code books, then be increased The complexity that the precoding added calculates will become extra burden；

Summary of the invention

Technical problem solved by the invention there are provided the storage of a kind of code book and uses the information transmit-receive side of this code book Method and device.

The embodiment of the present invention provides a kind of code book storage method, comprises the following steps:

Determine that code book, described codebook structure are:

Wherein: Φ^rRepresent the matrix of 2 × r dimension,Represent N_TThe matrix of/2 × r dimension, N_TIt is Launch antenna number, n is codeword number, and r is order Rank number, operator o be:

Wherein, A (:, n) n-th row of representing matrix A,Representing matrix direct product, if A (:, n) it is the vector of M × 1 dimension, then

$A(:,n)\⊗B(:,n)=\left[\begin{array}{c}A(1,n)*B(:,n)\\ A(2,n)*B(:,n)\\ .\\ .\\ .\\ A(M,n)*B(:,n)\end{array}\right];$

When r is 3,Structure be: $w_n^3=\left[\begin{array}{ccc}a& b& b\end{array}\right];$

When r is 4,Structure be: $w_n^4=\left[\begin{array}{cccc}a& a& b& b\end{array}\right];$

Wherein, a and b represents 2 N_TThe vector of/2 × 1, a and b is orthogonal；

Storage code book.

The embodiment of the present invention provides a kind of method for sending information using described code book, comprises the following steps:

Before precoding MIMO system transmission information, receiving the signal comprising codewords indexes information, extraction code word indexing is believed Breath；

Based on the codewords indexes information extracted, from described code book, select corresponding code word；

Directly as pre-coding matrix based on the code word selected or carry out conversion process and obtain pre-coding matrix；

Pre-coding matrix obtained by utilization carries out precoding processing；

The signal after precoding processing is sent by multiple antennas.

The embodiment of the present invention provides a kind of message receiving method using described code book, comprises the following steps:

When precoding MIMO system receives information, the information that receiving end/sending end sends；

Based on receiving information estimating channel information；

Based on channel information, from described code book, select corresponding code word；

Generate the codewords indexes information of selected code word；

Send the signal comprising codewords indexes information.

The embodiment of the present invention provides a kind of code book storage device, including:

Determine module, be used for determining that code book, described codebook structure are:

Wherein: Φ^rRepresent the matrix of 2 × r dimension,Represent N_TThe matrix of/2 × r dimension, N_TIt is Launch antenna number, n is codeword number, and r is order Rank number, operator o be:

Wherein, A (:, n) n-th row of representing matrix A,Representing matrix direct product, if A (:, n) it is the vector of M × 1 dimension, then

$A(:,n)\⊗B(:,n)=\left[\begin{array}{c}A(1,n)*B(:,n)\\ A(2,n)*B(:,n)\\ .\\ \·\\ \·\\ A(M,n)*B(:,n)\end{array}\right];$

When r is 3,Structure be: $w_n^3=\left[\begin{array}{ccc}a& b& b\end{array}\right];$

When r is 4,Structure be: $w_n^4=\left[\begin{array}{cccc}a& a& b& b\end{array}\right];$

Wherein, a and b represents 2 N_TThe vector of/2 × 1, a and b is orthogonal；

Memory module, is used for storing code book.

The embodiment of the present invention provides the dispensing device of a kind of closed-loop multi-antenna system, sets including described code book storage Standby, also include:

Receiver module, for before precoding MIMO system transmission information, receives the signal comprising codewords indexes information, carries Code fetch word indexing information；

Code book memory module, for obtaining code book from code book storage device；

Codeword number determines module, for based on the codewords indexes information extracted, selecting corresponding code from described code book Word；

Pre-coding matrix computing module, for directly as pre-coding matrix or carrying out conversion process based on the code word selected Obtain pre-coding matrix；

Precoding module, for utilizing obtained pre-coding matrix to carry out precoding processing；

Sending module, for sending the signal after precoding processing by multiple antennas.

The embodiment of the present invention provides the reception device of a kind of closed-loop multi-antenna system, sets including described code book storage Standby, also include:

Receiver module, is used for when precoding MIMO system receives information, the information that receiving end/sending end sends；

Channel estimation module, based on receiving information estimating channel information；

Code book memory module, for obtaining code book from code book storage device；

Codeword selection module, for based on channel information, selects corresponding code word from described code book；

Codewords indexes information generating module, for generating the codewords indexes information of selected code word；

Sending module, for sending the signal comprising codewords indexes information.

The present invention has the beneficial effect that:

The code book that the present invention provides can be matched with the channel distribution characteristic of dual polarized antenna, minimize codebook quantification and bring Performance loss, thus be effectively improved the performance of pre-coding system.

Accompanying drawing explanation

Fig. 1 is the antenna reference numbers schematic diagram of dual polarized antenna in the embodiment of the present invention；

Fig. 2 is code book storage method implementing procedure schematic diagram in the embodiment of the present invention；

Fig. 3 is the method for sending information implementing procedure schematic diagram using code book in the embodiment of the present invention；

Fig. 4 is the message receiving method implementing procedure schematic diagram using code book in the embodiment of the present invention；

Fig. 5 is code book storage device structural representation in the embodiment of the present invention；

Fig. 6 is storage medium schematic diagram in the embodiment of the present invention；

Fig. 7 is the dispensing device structural representation of closed-loop multi-antenna system in the embodiment of the present invention；

Fig. 8 is the reception apparatus structure schematic diagram of closed-loop multi-antenna system in the embodiment of the present invention；

Fig. 9 is Rank3 the 1st class code book and existing code book comparing result figure in the embodiment of the present invention；

Figure 10 is Rank3 the 2nd class code book and existing code book comparing result figure in the embodiment of the present invention；

Figure 11 is Rank4 the 1st class code book and existing code book comparing result figure in the embodiment of the present invention；

Figure 12 is Rank4 the 2nd class code book and existing code book comparing result figure in the embodiment of the present invention.

Detailed description of the invention

Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is illustrated.

In enforcement, for convenience of description, first the antenna reference numbers method of dual polarized antenna is arranged.Assume MIMO system System comprises N_TRoot launches antenna, N_RRoot reception antenna, Rank number is N, N_TFor even number, N_R, N >=1.Fig. 1 is the sky of dual polarized antenna Line label schematic diagram, as it can be seen, when antenna is carried out label, the antenna of the first same polarised direction of sequential calibration, then The antenna of another polarised direction of sequential calibration again.It should be noted that dual polarization multiaerial system code book generate scheme with The antenna reference numbers mode of dual polarized antenna is unrelated, if the antenna reference numbers mode arranged changes, and only need to be to the code generated The value that in Ben, antenna reference numbers is corresponding adjusts accordingly.

Fig. 2 is that code book stores method implementing procedure schematic diagram, as it can be seen, may comprise steps of:

Step 201, determining code book, described codebook structure is:

Wherein: Φ^rRepresent the matrix of 2 × r dimension,Represent N_TThe matrix of/2 × r dimension, N_TIt is Launch antenna number, n is codeword number, and r is order Rank number, operator o be:

Wherein, A (:, n) n-th row of representing matrix A,Representing matrix direct product, if A (:, n) it is the vector of M × 1 dimension, then

$A(:,n)\⊗B(:,n)=\left[\begin{array}{c}A(1,n)*B(:,n)\\ A(2,n)*B(:,n)\\ .\\ .\\ .\\ A(M,n)*B(:,n)\end{array}\right];$

Step 202, storage code book.

In enforcement, Rank-r codebook structure may is thatThen may is that

When r is 3,Structure be: $w_n^3=\left[\begin{array}{ccc}a& b& b\end{array}\right];$

When r is 4,Structure be: $w_n^4=\left[\begin{array}{cccc}a& a& b& b\end{array}\right];$

Wherein, a and b represents 2 N_TThe vector of/2 × 1, a and b is orthogonal.

Separately below first kind code book, Equations of The Second Kind code book are illustrated.

One, the 1st class code book:

When r is respectively 3,4,

${\mathrm{\Φ}}^3=\left[\begin{array}{ccc}1& \sqrt{2}& 0\\ 1& 0& \sqrt{2}\end{array}\right];$

${\mathrm{\Φ}}^4=\left[\begin{array}{cccc}1& 0& 1& 0\\ 0& 1& 0& 1\end{array}\right].$

Code book example 1:

Code book example 2:

Code book example 3:

Code book example 4:

Two, the 2nd class code book:

When r is respectively 3,4,

${\mathrm{\Φ}}^3=\left[\begin{array}{ccc}1& 1& 1\\ 1& 1& -1\end{array}\right];$

${\mathrm{\Φ}}^4=\left[\begin{array}{cccc}1& 1& 1& 1\\ 1& -1& 1& -1\end{array}\right].$

Code book example 5:

Code book example 6:

Code book example 7:

Code book example 8:

Wherein:

Label	kn
		0	k0=[1 1-1-1]T
1	k1=[1 j 1 j]T
		2	k2=[1-1-1 1]T
3	k3=[1-j 1-j]T
		4	k4=[1 1 1-1]T
5	k5=[1 1-1 1]T
		6	k6=[1-1 1 1]T
7	k7=[1-1-1-1]T

List above-mentioned code book example in force；But, in theory, above-mentioned code book example is being carried out Also it is can to solve same technical problem, obtain same technique effect after conventional and/or general procedure, such as, due to Normalized, the new code book that above-mentioned code book example is obtained divided by a certain constant；Therefore, above-mentioned code book is only used for instructing ability The most how field technique personnel implement the present invention, but it is not intended that be only capable of using the code book in examples detailed above, permissible in implementation process In conjunction with putting into practice needs to determine corresponding code book or its deformation.

The application of the code book provided in embodiment for a better understanding of the present invention, separately below from the transmission of information with connect Use during receipts illustrates.

Fig. 3 is the method for sending information implementing procedure schematic diagram using code book, as it can be seen, can during information sends To comprise the following steps:

Step 301, before precoding MIMO system transmission information, receive and comprise the signal of codewords indexes information, extraction code Word indexing information；

Step 302, codewords indexes information based on extraction, select corresponding code word from described code book；

Step 303, directly as pre-coding matrix based on the code word selected or carry out conversion process and obtain pre-coding matrix；

Pre-coding matrix obtained by step 304, utilization carries out precoding processing；

Step 305, send the signal after precoding processing by multiple antennas.

In enforcement, during precoding MIMO system transmission information, first receive the letter comprising codewords indexes information Number, extraction code word indexing information.Secondly, based on the codewords indexes information extracted, from described code book, corresponding code word is selected.Again Secondary, carry out conversion process based on code word and obtain pre-coding matrix, e.g., ZF process etc., it is also possible to directly corresponding code word is made For pre-coding matrix.Then, the pre-coding matrix obtained by utilization carries out precoding processing.Finally, by the signal after precoding Sent by multiple antennas.

Fig. 4 is the message receiving method implementing procedure schematic diagram using code book, as it can be seen, can in information reception process To comprise the following steps:

Step 401, precoding MIMO system receive information time, receiving end/sending end send information；

Step 402, based on receive information estimating channel information；

Step 403, based on channel information, from described code book, select corresponding code word；

Step 404, the codewords indexes information of the selected code word of generation；

Step 405, transmission comprise the signal of codewords indexes information.

In enforcement, during precoding MIMO system reception information, first, the information that receiving end/sending end sends.Its Secondary, based on receiving information estimating channel information.Again, based on channel information, from described code book, select corresponding code word.So After, generate the codewords indexes information of selected code word.Finally, the signal comprising codewords indexes information is sent.

Based on same inventive concept, the embodiment of the present invention additionally provides a kind of code book storage device, a kind of storage medium, The dispensing device of a kind of closed-loop multi-antenna system, the reception device of a kind of closed-loop multi-antenna system, due to these unit solutions Certainly the principle of problem and a kind of code book storage method, a kind of use the method for sending information of described code book, a kind of use described code This message receiving method is similar, and therefore the enforcement of these units may refer to the enforcement of method, the most superfluous in place of repetition State.

Fig. 5 is code book storage device structural representation, as it can be seen, may include that in storage organization

Determine module 501, be used for determining that code book, described codebook structure are:

Wherein: Φ^rRepresent the matrix of 2 × r dimension,Represent N_TThe matrix of/2 × r dimension, N_TIt is Launch antenna number, n is codeword number, and r is order Rank number, operator ο be:

Wherein, A (:, n) n-th row of representing matrix A,Representing matrix direct product, if A (:, n) it is the vector of M × 1 dimension, then

$A(:,n)\⊗B(:,n)=\left[\begin{array}{c}A(1,n)*B(:,n)\\ A(2,n)*B(:,n)\\ .\\ .\\ .\\ A(M,n)*B(:,n)\end{array}\right];$

Memory module 502, is used for storing code book.

In enforcement, determine that module can also be further used for when determining code book, determine

When r is 3,Structure be: $w_n^3=\left[\begin{array}{ccc}a& b& b\end{array}\right];$

When r is 4,Structure be: $w_n^4=\left[\begin{array}{cccc}a& a& b& b\end{array}\right];$

Wherein, a and b represents 2 N_TThe vector of/2 × 1, a and b is orthogonal.

In enforcement, determine that module can also be further used for when determining code book, when r is respectively 3,4, determine

${\mathrm{\Φ}}^3=\left[\begin{array}{ccc}1& \sqrt{2}& 0\\ 1& 0& \sqrt{2}\end{array}\right];$

${\mathrm{\Φ}}^4=\left[\begin{array}{cccc}1& 0& 1& 0\\ 0& 1& 0& 1\end{array}\right].$

In enforcement, determine that module can also be further used for when determining code book, when r is respectively 3,4, determine

${\mathrm{\Φ}}^3=\left[\begin{array}{ccc}1& 1& 1\\ 1& 1& -1\end{array}\right];$

${\mathrm{\Φ}}^4=\left[\begin{array}{cccc}1& 1& 1& 1\\ 1& -1& 1& -1\end{array}\right].$

Fig. 6 is storage medium schematic diagram, as it can be seen, storage has the code book, described codebook structure to be on a storage medium:

Wherein: Φ^rRepresent the matrix of 2 × r dimension,Represent N_TThe matrix of/2 × r dimension, N_TIt is Launch antenna number, n is codeword number, and r is order Rank number, operator ο be:

Wherein, A (:, n) n-th row of representing matrix A,Representing matrix direct product, if A (:, n) it is the vector of M × 1 dimension, then

$A(:,n)\⊗B(:,n)=\left[\begin{array}{c}A(1,n)*B(:,n)\\ A(2,n)*B(:,n)\\ .\\ .\\ .\\ A(M,n)*B(:,n)\end{array}\right].$

In enforcement, described code book exists

When r is 3,Structure be: $w_n^3=\left[\begin{array}{ccc}a& b& b\end{array}\right];$

When r is 4,Structure be: $w_n^4=\left[\begin{array}{cccc}a& a& b& b\end{array}\right];$

Wherein, a and b represents 2 N_TThe vector of/2 × 1, a and b is orthogonal.

In enforcement, described code book when r is respectively 3,4,

${\mathrm{\Φ}}^3=\left[\begin{array}{ccc}1& \sqrt{2}& 0\\ 1& 0& \sqrt{2}\end{array}\right];$

${\mathrm{\Φ}}^4=\left[\begin{array}{cccc}1& 0& 1& 0\\ 0& 1& 0& 1\end{array}\right].$

In enforcement, described code book when r is respectively 3,4,

${\mathrm{\Φ}}^3=\left[\begin{array}{ccc}1& 1& 1\\ 1& 1& -1\end{array}\right];$

${\mathrm{\Φ}}^4=\left[\begin{array}{cccc}1& 1& 1& 1\\ 1& -1& 1& -1\end{array}\right].$

Those skilled in the art are it should be appreciated that the code book specific embodiment of the present invention can be provided as method, system or meter Calculation machine program product.Therefore, the code book of the present invention can use complete hardware embodiment, complete software to implement in the specific implementation Example or the form of the embodiment in terms of combining software and hardware.And, the code book of the present invention can use one or more wherein The computer-usable storage medium including computer usable program code (includes but not limited to magnetic disc store, CD-ROM, light Learn memory etc.) form of the upper computer program implemented.

The present invention implement in code book be provided to these computer program instructions to all-purpose computer, special-purpose computer, The processor of Embedded Processor or other programmable data processing device is to produce a machine so that by computer or its The instruction that the processor of his programmable data processing device performs produces the device of the function specified for code book.

These computer program instructions realizing code book function may be alternatively stored in and can guide computer or other numbers able to programme According in the computer-readable memory that processing equipment works in a specific way so that be stored in this computer-readable memory Instruction produces the manufacture including command device, and this command device realizes the function of code book in an embodiment.

These computer program instructions realizing code book function also can be loaded into computer or other programmable datas process On equipment so that perform sequence of operations step on computer or other programmable devices to produce computer implemented place Reason, thus the instruction performed on computer or other programmable devices provides for realizing the function of code book in embodiment.

Fig. 7 is the dispensing device structural representation of closed-loop multi-antenna system, as it can be seen, dispensing device can include as Code book storage device in Fig. 5, and/or, such as storage medium in Fig. 6, also include:

Receiver module 701, for before precoding MIMO system transmission information, receives the letter comprising codewords indexes information Number, extraction code word indexing information；

Code book memory module 702, for obtaining code book from code book storage device and/or storage medium；

Codeword number determines module 703, for based on the codewords indexes information extracted, selects corresponding from described code book Code word；

Pre-coding matrix computing module 704, for or converting directly as pre-coding matrix based on the code word selected Process obtains pre-coding matrix；

Precoding module 705, for utilizing obtained pre-coding matrix to carry out precoding processing；

Sending module 706, for sending the signal after precoding processing by multiple antennas.

Fig. 8 is the reception apparatus structure schematic diagram of closed-loop multi-antenna system, as it can be seen, receive in device can include as Code book storage device in Fig. 5, and/or, such as storage medium in Fig. 6, also include:

Receiver module 801, is used for when precoding MIMO system receives information, the information that receiving end/sending end sends；

Channel estimation module 802, based on receiving information estimating channel information；

Code book memory module 803, for obtaining code book from code book storage device and/or storage medium；

Codeword selection module 804, for based on channel information, selects corresponding code word from described code book；

Codewords indexes information generating module 805, for generating the codewords indexes information of selected code word；

Sending module 806, for sending the signal comprising codewords indexes information.

For convenience of description, each several part of apparatus described above is divided into various module or unit to be respectively described with function. Certainly, the function of each module or unit can be realized in same or multiple softwares or hardware when implementing the present invention.

As seen from the above-described embodiment, the present invention provide code book can be matched with dual polarized antenna channel distribution characteristic, Minimize the performance loss that codebook quantification brings, thus be effectively improved the performance of pre-coding system.

Under identical simulated conditions, shown below is in existing code book 1, code book 2, code book 3 and the embodiment of the present invention and list The contrast of several code book example performances, wherein code book example 3 is identical with example 2 performance, code book example 7 and example 6 performance phase With, so not listing the result of code book example 3 and 7 in Fang Zhen；Using 16PSK element in existing code book 4, other own Code book all uses 8PSK and 0 element, so not contrasting with it.Simulation parameter is as shown in table 1, simulation result such as Fig. 9-12 Shown in, wherein, Fig. 9 is Rank3 the 1st class code book and existing code book comparing result figure, Figure 10 are Rank3 the 2nd class code book and existing Code book comparing result figure, Figure 11 are Rank4 the 1st class code book and existing code book comparing result figure, Figure 12 are Rank4 the 2nd class code book With existing code book comparing result figure.

Can be seen that from simulation result, the performance the most existing code book scheme of carried code book example has certain gain, phase For code book 1, although under Rank3, gain is less, but gain is the most obvious under Rank4；Relative to code book 2, Rank3 and More significantly gain is had under Rank4；Relative to code book 3, under Rank4, performance is substantially suitable, but has bigger under Rank3 Gain.

Table 1 simulation parameter

Wherein, AMC is Adaptive Modulation and Coding (Adapt Modulation Coding)；HARQ repeats automatically for mixing Request (Hybrid Automatic Repeat Request)；MMSE is least mean-square error (Minimum Mean Square Error)；AoD is for leaving angle (Angle of Departure).

Obviously, those skilled in the art can carry out various change and the modification essence without deviating from the present invention to the present invention God and scope.So, if these amendments of the present invention and modification belong to the scope of the claims in the present invention and equivalent technologies thereof Within, then the present invention is also intended to comprise these change and modification.

Claims (6)

1. a code book storage method, it is characterised in that comprise the following steps:

Determine that code book, described codebook structure are:

Wherein: Φ^rRepresent the matrix of 2 × r dimension,Represent N_TThe matrix of/2 × r dimension, N_TIt is to launch sky Line number, n is codeword number, and r is order Rank number, and the definition of operator ο is:

Wherein, A (:, n) N-th row of representing matrix A,Representing matrix direct product, if A (:, n) it is the vector of M × 1 dimension, then

When r is 3,Structure be:

According to the definition of A ο B operator, described codebook structure is:

Or, when r is 3,Structure be:

According to the definition of A ο B operator, described codebook structure is:

When r is 4,Structure be:

According to the definition of A ο B operator, described codebook structure is:

Or, when r is 4,Structure be:

According to the definition of A ο B operator, described codebook structure is:

Wherein, a and b represents 2 N_TThe vector of/2 × 1, a and b is orthogonal；

Storage code book.

2. the method for sending information using code book as claimed in claim 1, it is characterised in that comprise the following steps:

Before precoding multiple-input, multiple-output mimo system transmission information, receive the signal comprising codewords indexes information, extract code word rope Fuse ceases；

Based on the codewords indexes information extracted, from described code book, select corresponding code word；

Directly as pre-coding matrix based on the code word selected or carry out conversion process and obtain pre-coding matrix；

Pre-coding matrix obtained by utilization carries out precoding processing；

The signal after precoding processing is sent by multiple antennas.

3. the message receiving method using code book as claimed in claim 1, it is characterised in that comprise the following steps:

When precoding MIMO system receives information, the information that receiving end/sending end sends；

Based on receiving information estimating channel information；

Based on channel information, from described code book, select corresponding code word；

Generate the codewords indexes information of selected code word；

Send the signal comprising codewords indexes information.

4. a code book storage device, it is characterised in that including:

Determine module, be used for determining that code book, described codebook structure are:

Wherein: Φ^rRepresent the matrix of 2 × r dimension,Represent N_rThe matrix of/2 × r dimension, N_TIt is to launch Antenna number, n is codeword number, and r is order Rank number, and the definition of operator ο is:

Wherein, A (:, n) N-th row of representing matrix A,Representing matrix direct product, if A (:, n) it is the vector of M × 1 dimension, then

When r is 3,Structure be:

According to the definition of A ο B operator, described codebook structure is:

Or, when r is 3,Structure be:

According to the definition of A ο B operator, described codebook structure is:

When r is 4,Structure be:

According to the definition of A ο B operator, described codebook structure is:

Or, when r is 4,Structure be:

According to the definition of A ο B operator, described codebook structure is:

Wherein, a and b represents 2 N_TThe vector of/2 × 1, a and b is orthogonal；

Memory module, is used for storing code book.

5. the dispensing device of a closed-loop multi-antenna system, it is characterised in that include that code book storage as claimed in claim 4 sets Standby, also include:

Receiver module, for before precoding MIMO system transmission information, receives the signal comprising codewords indexes information, extraction code Word indexing information；

Code book memory module, for obtaining code book from code book storage device；

Codeword number determines module, for based on the codewords indexes information extracted, selecting corresponding code word from described code book；

Pre-coding matrix computing module, for directly as pre-coding matrix based on the code word selected or carrying out conversion process and obtain Pre-coding matrix；

Precoding module, for utilizing obtained pre-coding matrix to carry out precoding processing；

Sending module, for sending the signal after precoding processing by multiple antennas.

6. the reception device of a closed-loop multi-antenna system, it is characterised in that include that code book storage as claimed in claim 4 sets Standby, also include:

Receiver module, is used for when precoding MIMO system receives information, the information that receiving end/sending end sends；

Channel estimation module, based on receiving information estimating channel information；

Code book memory module, for obtaining code book from code book storage device；

Codeword selection module, for based on channel information, selects corresponding code word from described code book；

Codewords indexes information generating module, for generating the codewords indexes information of selected code word；

Sending module, for sending the signal comprising codewords indexes information.