CN104980198A - Double codebook generation method used for MIMO system - Google Patents
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Abstract
The invention provides a double codebook generation method used for a MIMO system. The method comprises that each antenna port fairly traverses all antenna port phase diversity conditions, a pre-coding matrix for reflecting each channel characteristic is generated during traversal, and then a second-stage codebook is formed. According to the invention, double codebooks for the MIMO system can be rapidly, conveniently and accurately generated; and the invention is particularly suitable for high rank conditions.
Description
Technical field
The present invention relates to multiple-input and multiple-output (MIMO) technology in wireless communication technology field, particularly relate to a kind of two method for generating codebooks for mimo system.
Background technology
Be called " a kind of method and system adopting dicode originally to carry out feedback of channel information " in name, application number is in the Chinese invention patent application of 201010289774.2, propose a kind of method adopting dicode originally to carry out feedback of channel information: receiving side signal selects a first best code word from the code book of the pre-coding matrix of prior art, and from the second level code book pre-set, select the optimum code word of a secondary according to maximum capacity standard, then corresponding codewords indexes is sent to signalling, signalling is according to the codewords indexes received, the first order code book that inquiry pre-sets and second level code book obtain the optimum code word of corresponding first best code word and the second level, last generating pre-coding matrix is the product of the optimum code word in first best code word and the second level.After this patent application adopts second level version, originally can more accurately reflect actual channel condition than solid size.
This patent application further discloses the generation method of second level code book, is the form of spin matrix by second level codebook design, thus makes channel capacity reach the upper limit.But this is that the method for spin matrix is only applicable to the situation that order is 1 ~ 3 by second level codebook design, order is greater than to the situation of 3, obviously cannot designs second level code book by spin matrix.Therefore, a kind of two method for generating codebooks being applicable to order and being greater than the situation of 3 are also lacked at present.
Summary of the invention
In order to overcome the deficiencies in the prior art, the present invention proposes a kind of two method for generating codebooks for mimo system, the method is: the antenna port phase difference situation that each antenna port justice traversal is all, each channel characteristics during traversal is all generated to the pre-coding matrix of this channel characteristics of reflection, composition second level code book.
Preferably, the side-play amount of described phase difference is limited in pi/2, further, deletes the phase difference situation that asymmetric phase difference situation and probability of occurrence are less than setting threshold value.
Preferably, when order is 4, second level code book is the set of the pre-coding matrix composition shown in following table:
| Codewords indexes | Pre-coding matrix |
| 1 | diag{exp(-pi*j/2),1,1,1} |
| 2 | diag{1,exp(-pi*j/2),1,1} |
| 3 | diag{1,1,exp(-pi*j/2),1} |
| 4 | diag{1,1,1,exp(-pi*j/2)} |
| 5 | diag{1,1,exp(-pi*j/2),exp(pi*j/2)} |
| 6 | diag{1,exp(-pi*j/2),1,exp(pi*j/2)} |
| 7 | diag{1,exp(-pi*j/2),exp(pi*j/2),1} |
| 8 | diag{exp(-pi*j/2),1,1,exp(pi*j/2)} |
| 9 | diag{exp(-pi*j/2),1,exp(pi*j/2),1} |
| 10 | diag{exp(-pi*j/2),exp(pi*j/2),1,1} |
| 11 | diag{1,1,exp(pi*j/2),exp(-pi*j/2)} |
| 12 | diag{1,exp(pi*j/2),1,exp(-pi*j/2)} |
| 13 | diag{1,exp(pi*j/2),exp(-pi*j/2),1} |
| 14 | diag{exp(pi*j/2),1,1,exp(-pi*j/2)} |
| 15 | diag{exp(pi*j/2),1,exp(-pi*j/2),1} |
| 16 | diag{exp(pi*j/2),exp(-pi*j/2),1,1} |
。
Preferably, when order is 8, second level code book is a unique pre-coding matrix: front 4 row of this unique pre-coding matrix are the codewords indexes in the second level code book of 4 by above-mentioned order is 1,2, the pre-coding matrix parallel composition successively of 3,4,5,6,7,8; Rear 4 row of this unique pre-coding matrix are the codewords indexes in the second level code book of 4 by above-mentioned order is 9,10, the pre-coding matrix parallel composition successively of 11,12,13,14,15,16.
Preferably, when order is 5,6 or 7, the set that the pre-coding matrix that second level code book chooses 5,6 or 7 row generations for employing circulation elimination method from the pre-coding matrix that above-mentioned order is 8 forms.
Preferred further, when order is 5, second level code book is the set of the pre-coding matrix composition shown in following table:
| Codewords indexes | Pre-coding matrix |
| 1 | Get the 4th, 5,6,7,8 row that order is the pre-coding matrix of 8 successively |
| 2 | Get the 6th, 7,8,1,2 row that order is the pre-coding matrix of 8 successively |
| 3 | Get the 8th, 1,2,3,4 row that order is the pre-coding matrix of 8 successively |
| 4 | Get the 2nd, 3,4,5,6 row that order is the pre-coding matrix of 8 successively |
。
Preferred further, when order is 6, second level code book is the set of the pre-coding matrix composition shown in following table:
| Codewords indexes | Pre-coding matrix |
| 1 | Get that order is the pre-coding matrix of 8 successively the 3rd, 4,5,6,7,8 row |
| 2 | Get that order is the pre-coding matrix of 8 successively the 5th, 6,7,8,1,2 row |
| 3 | Get that order is the pre-coding matrix of 8 successively the 7th, 8,1,2,3,4 row |
| 4 | Get that order is the pre-coding matrix of 8 successively the 1st, 2,3,4,5,6 row |
。
Preferred further, when order is 7, second level code book is the set of the pre-coding matrix composition shown in following table:
| Codewords indexes | Pre-coding matrix |
| 1 | Get that order is the pre-coding matrix of 8 successively the 2nd, 3,4,5,6,7,8 row |
| 2 | Get that order is the pre-coding matrix of 8 successively the 1st, 2,4,5,6,7,8 row |
| 3 | Get that order is the pre-coding matrix of 8 successively the 1st, 2,3,4,6,7,8 row |
| 4 | Get that order is the pre-coding matrix of 8 successively the 1st, 2,3,4,5,6,8 row |
。
Preferably, when order is 5, second level code book is the set of the pre-coding matrix composition shown in following table:
| Codewords indexes | Pre-coding matrix |
| 1 | diag{1,1,1,1,1} |
| 2 | diag{-i,1,1,1,1} |
| 3 | diag{1,-i,1,1,1} |
| 4 | diag{1,1,-i,1,1} |
| 5 | diag{1,1,1,-i,1} |
| 6 | diag{1,1,1,1,-i} |
| 7 | diag{1,1,1,-i,i} |
| 8 | diag{1,1,-i,1,i} |
| 9 | diag{1,-i,1,1,i} |
| 10 | diag{-i,1,1,1,i} |
| 11 | diag{1,1,-i,i,1} |
| 12 | diag{1,-i,1,i,1} |
| 13 | diag{-i,1,1,i,1} |
| 14 | diag{1,i,-I,1,1} |
| 15 | diag{i,1,-i,1,1} |
| 16 | diag{i,-i,1,1,1} |
Preferably, in said method, first order code book reuses the code book of the pre-coding matrix of prior art.The code book that the code book of the pre-coding matrix of described prior art can be LTE R11 and specify in version in the past.Preferred further, for the mimo system of 8 antennas, when order is 1 ~ 4, the pre-coding matrix of first order code book is
the wherein W4_4 pre-coding matrix that to be 4 antenna orders of LTE R8 version be in the code book of 4.When order is 5, the pre-coding matrix of first order code book is
the wherein W4_4 pre-coding matrix that to be 4 antenna orders of LTE R8 version be in the code book of 4, the W4_1 pre-coding matrix that to be 4 antenna orders of LTER8 version be in the code book of 1.
Adopt the present invention can fast, convenient, the dicode basis that generates mimo system accurately, be specially adapted to high order situation.The present invention, except being applicable to 2D mimo system, is especially also applicable to 3D mimo system, and when for 3D mimo system, second level code book can be reflected in the space division multiplexing of vertical dimensions, and 3D mimo channel capacity is greatly improved.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the chart of the second level code book of the embodiment of the present invention one;
Fig. 2 is the chart of the second level code book of the embodiment of the present invention two;
Fig. 3 be the circulation elimination method of the embodiment of the present invention four choose schematic diagram;
Fig. 4 be the circulation elimination method of the embodiment of the present invention five choose schematic diagram;
Fig. 5 be the circulation elimination method of the embodiment of the present invention six choose schematic diagram.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments; It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one: 8 antenna MIMO system, the design of code book when order is 4
For multiple-antenna MIMO system, first order code book can reuse the code book of the pre-coding matrix of prior art.The mimo system of the present embodiment adopts 8 antennas, when order is 1 ~ 4, the 4 antenna orders that first order version is reused in LTE R8 version are the code book of 4, if set W4_4 as 4 antenna orders of LTE R8 version be the pre-coding matrix of 4, then the first order pre-coding matrix of the present embodiment is:
For second level code book, consider from fairness angle, the set of all channel characteristics of all pre-coding matrix reflections of code book should be: the antenna port phase difference situation that each antenna port justice traversal is all.Due under permanent mould condition, the element of each pre-coding matrix illustrates the phase pushing figure of an antenna port, therefore each antenna port travels through all possible phase deviation, and each channel characteristics during traversal is all generated to the pre-coding matrix of this channel characteristics of reflection, just can form second level code book.But from realization, if travel through all channel characteristics to generate second level code book according to this ideal case, code book size can become too huge.In the present embodiment, order is 4, then the total following four kinds of situations of the phase difference of 4 antenna ports (i.e. 4 data stream port):
(1) four port homophase
(2) only Single port is different from other ports
(3) two-port is identical and different between two from all the other two-port
(4) two-port is different between two
Each antenna port travels through above-mentioned 4 kinds of phase difference situations, then a total 1+4 × 3+4 × 3 × 3+4 × 3 × 2=73 kind channel characteristics, if generate secondary code book by these 73 kinds of channel characteristics, obvious code book size is by excessive.Have to take the second best, the present embodiment, while reflecting channel characteristics, constructs code book with the least possible pre-coding matrix as far as possible comprehensively.The phase deviation that each antenna port caused due to multipath fading considering in realistic channels environment arrives receiving terminal is less, so within the present embodiment is limited in pi/2 the phase pushing figure in pre-coding matrix, so just only there is 1+4 × 2+4 × 3=21 kind channel characteristics, and then have compressed code book size.Consider realistic channels environment again, the four port homophases phase difference situation different from other ports with only Single port is less, probability of occurrence is less than the threshold value 10% preset, then remove four kinds of channel characteristics that four port homophases and Single port shift to an earlier date pi/2 further, remain 16 kinds of channel characteristics, generate 16 pre-coding matrixes to these 16 kinds of channel characteristics, composition second level code book, concrete second level version is the set of the pre-coding matrix composition shown in Fig. 1.
Embodiment two: 8 antenna MIMO system, the design of code book when order is 5
The first order code book 4 antenna orders of reusing in LTE R8 version of the present embodiment be 4 code book and 4 antenna orders be the code book of 1, be designed to
the wherein W4_4 pre-coding matrix that to be 4 antenna orders of LTE R8 version be in the code book of 4, the W4_1 pre-coding matrix that to be 4 antenna orders of LTE R8 version be in the code book of 1.
The second level code book of the present embodiment is according to the same design thinking of embodiment one, within phase pushing figure in pre-coding matrix is limited in pi/2, and according to coupling, remove asymmetric phase difference situation, i.e. five ports different phase difference situation different mutually between two with three ports between two, remaining following three kinds of situations, that is:
(1) five-port homophase
(2) only Single port is different from other
(3) two-port is identical and different between two from its excess-three port
After restriction, residue 1+5+10=16 kind channel characteristics, then the pre-coding matrix number of second level code book is 16, and concrete second level version is the set of the pre-coding matrix composition shown in Fig. 2.
Embodiment three: multiple-antenna MIMO system, the design of second level code book when order is 8
When in multiple-antenna MIMO system, order is 8, when mentality of designing is 4 with the order of embodiment one, mentality of designing is identical, the antenna port phase difference situation that namely each antenna port justice traversal is all.The present embodiment reuses the second level code book w2_R4 of embodiment one, with ensureing that the combination of weight vectors of port fairness is as the column vector in pre-coding matrix, generate the second level code book that order is 8, this code book is a unique pre-coding matrix w2_R8, specific as follows:
W2_R8=[w2_R4(:,:,1)w2_R4(:,:,2)w2_R4(:,:,3)w2_R4(:,:,4)w2_R4(:,:,5)w2_R4(:,:,6)w2_R4(:,:,7)w2_R4(:,:,8);
w2_R4(:,:,9)w2_R4(:,:,10)w2_R4(:,:,11)w2_R4(:,:,12)w2_R4(:,:,13)w2_R4(:,:,14)w2_R4(:,:,15)w2_R4(:,:,16)]
Front 4 row of above-mentioned unique pre-coding matrix are the codewords indexes in the secondary code book of 4 by order is 1,2, the pre-coding matrix parallel composition successively of 3,4,5,6,7,8; Rear 4 row are codewords indexes in the secondary code book of 4 by order is 9,10, the pre-coding matrix parallel composition successively of 11,12,13,14,15,16.
Embodiment four: multiple-antenna MIMO system, the design of second level code book when order is 5
When order is 5, the method for embodiment two can be adopted to generate second level code book, the method for the present embodiment also can be adopted to be choose 5 row the pre-coding matrix of 8 as pre-coding matrix from the order of embodiment three.Collateral security fairness angle is a kind of preferably follows the example of is circulation elimination method as shown in Figure 3, first pre-coding matrix get that order is the pre-coding matrix of 8 the [4,5,6,7,8] row composition, second pre-coding matrix gets the [6,7,8,1,2] OK, the 3rd pre-coding matrix gets the [8,1,2,3,4] OK, 4th pre-coding matrix gets the [2,3,4,5,6] OK, namely second level code book is specific as follows:
W2_R5(:,:,1)=[W2_R8(4,;)W2_R8(5,;)W2_R8(6,;)W2_R8(7,;)W2_R8(8,;)]
W2_R5(:,:,2)=[W2_R8(6,;)W2_R8(7,;)W2_R8(8,;)W2_R8(1,;)W2_R8(2,;)]
W2_R5(:,:,3)=[W2_R8(8,;)W2_R8(1,;)W2_R8(2,;)W2_R8(3,;)W2_R8(4,;)]
W2_R5(:,:,4)=[W2_R8(2,;)W2_R8(3,;)W2_R8(4,;)W2_R8(5,;)W2_R8(6,;)]
Embodiment five: multiple-antenna MIMO system, the design of second level code book when order is 6
The present embodiment order is 6, and second level codebook design thinking is identical with the thinking of embodiment four, is choose 6 row the pre-coding matrix of 8 as pre-coding matrix from the order of embodiment three.Equally, it is circulation elimination method as shown in Figure 4 that collateral security fairness angle a kind of preferably follows the example of, first pre-coding matrix get that order is the pre-coding matrix of 8 the [3,4,5,6,7,8] row composition, second pre-coding matrix gets the [5,6,7,8,1,2] OK, the 3rd pre-coding matrix gets the [7,8,1,2,3,4] OK, the 4th pre-coding matrix gets the [1,2,3,4,5,6] OK, namely second level code book is specific as follows:
W2_R6(:,:,1)=[W2_R8(3,;)W2_R8(4,;)W2_R8(5,;)W2_R8(6,;)W2_R8(7,;)W2_R8(8,;)]
W2_R6(:,:,2)=[W2_R8(5,;)W2_R8(6,;)W2_R8(7,;)W2_R8(8,;)W2_R8(1,;)W2_R8(2,;)]
W2_R6(:,:,3)=[W2_R8(7,;)W2_R8(8,;)W2_R8(1,;)W2_R8(2,;)W2_R8(3,;)W2_R8(4,;)]
W2_R6(:,:,4)=[W2_R8(1,;)W2_R8(2,;)W2_R8(3,;)W2_R8(4,;)W2_R8(5,;)W2_R8(6,;)]
Embodiment six: multiple-antenna MIMO system, the design of second level code book when order is 7
The present embodiment order is 7, and second level codebook design thinking is identical with the thinking of embodiment four, is choose 7 row the pre-coding matrix of 8 as pre-coding matrix from the order of embodiment three.Equally, it is circulation elimination method as shown in Figure 5 that collateral security fairness angle a kind of preferably follows the example of, first pre-coding matrix get that order is the pre-coding matrix of 8 the [2,3,4,5,6,7,8] row composition, second pre-coding matrix gets the [1,2,4,5,6,7,8] OK, 3rd pre-coding matrix gets the [1,2,3,4,6,7,8] OK, the 4th pre-coding matrix gets the [1,2,3,4,5,6,8] OK, namely second level code book is specific as follows:
W2_R7(:,:,1)=[W2_R8(2,;)W2_R8(3,;)W2_R8(4,;)W2_R8(5,;)W2_R8(6,;)W2_R8(7,;)W2_R8(8,;)]
W2_R7(:,:,2)=[W2_R8(1,;)W2_R8(2,;)W2_R8(4,;)W2_R8(5,;)W2_R8(6,;)W2_R8(7,;)W2_R8(8,;)]
W2_R7(:,:,3)=[W2_R8(1,;)W2_R8(2,;)W2_R8(3,;)W2_R8(4,;)W2_R8(6,;)W2_R8(7,;)W2_R8(8,;)]
W2_R7(:,:,4)=[W2_R8(1,;)W2_R8(2,;)W2_R8(3,;)W2_R8(4,;)W2_R8(5,;)W2_R8(6,;)W2_R8(8,;)]。
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in a computer read/write memory medium, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (14)
1. for two method for generating codebooks for mimo system, it is characterized in that, described method is:
The antenna port phase difference situation that each antenna port justice traversal is all, all generates the pre-coding matrix of this channel characteristics of reflection for each channel characteristics during traversal, composition second level code book.
2. method according to claim 1, is characterized in that: within the side-play amount of described phase difference is limited in pi/2.
3. method according to claim 2, is characterized in that: described phase difference situation deletes asymmetric phase difference situation and probability of occurrence is less than the phase difference situation setting threshold value.
4. method according to claim 3, is characterized in that: when order is 4, and second level code book is the set of the pre-coding matrix composition shown in following table:
。
5. method according to claim 4, is characterized in that: when order is 8, and second level code book is a unique pre-coding matrix: front 4 row of this unique pre-coding matrix are the codewords indexes in the second level code book of 4 by order is 1,2,3,4,5, the pre-coding matrix parallel composition successively of 6,7,8; Rear 4 row of this unique pre-coding matrix are the codewords indexes in the second level code book of 4 by order is 9,10, the pre-coding matrix parallel composition successively of 11,12,13,14,15,16.
6. method according to claim 5, is characterized in that: when order is 5,6 or 7, the set that the pre-coding matrix that second level code book chooses 5,6 or 7 row generations for employing circulation elimination method from the pre-coding matrix that order is 8 forms.
7. method according to claim 5, is characterized in that: when order is 5, and second level code book is the set of the pre-coding matrix composition shown in following table:
。
8. method according to claim 5, is characterized in that: when order is 6, and second level code book is the set of the pre-coding matrix composition shown in following table:
。
9. method according to claim 5, is characterized in that: when order is 7, and second level code book is the set of the pre-coding matrix composition shown in following table:
。
10. method according to claim 3, is characterized in that: when order is 5, and second level code book is the set of the pre-coding matrix composition shown in following table:
。
11. methods according to claims 1 to 3 any one, is characterized in that: first order code book reuses the code book of the pre-coding matrix of prior art.
12. methods according to claim 11, is characterized in that: the code book that the code book of the pre-coding matrix of described prior art is LTE R11 and specified in version in the past.
13. methods according to claim 12, is characterized in that: for the mimo system of 8 antennas, and when order is 1 ~ 4, the pre-coding matrix of first order code book is
the wherein W4_4 pre-coding matrix that to be 4 antenna orders of LTE R8 version be in the code book of 4.
14. methods according to claim 12, is characterized in that: for the mimo system of 8 antennas, and when order is 5, the pre-coding matrix of first order code book is
the wherein W4_4 pre-coding matrix that to be 4 antenna orders of LTE R8 version be in the code book of 4, the W4_1 pre-coding matrix that to be 4 antenna orders of LTE R8 version be in the code book of 1.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101534268A (en) * | 2008-03-14 | 2009-09-16 | 中兴通讯股份有限公司 | Codebook design and feedback method for pre-coding of multi-input and multi-output system |
| CN102006111A (en) * | 2010-11-03 | 2011-04-06 | 北京邮电大学 | Codebook generating method and device of pre-coding in multiple-input-multiple-output (MIMO) system |
| US20130195035A1 (en) * | 2010-04-30 | 2013-08-01 | Ntt Docomo, Inc. | Mobile terminal device and radio base station apparatus |
| US20140029465A1 (en) * | 2011-04-15 | 2014-01-30 | Ntt Docomo, Inc. | Mobile terminal apparatus, radio base station apparatus, radio communication method and radio communication system |
-
2014
- 2014-04-03 CN CN201410133544.5A patent/CN104980198B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101534268A (en) * | 2008-03-14 | 2009-09-16 | 中兴通讯股份有限公司 | Codebook design and feedback method for pre-coding of multi-input and multi-output system |
| US20130195035A1 (en) * | 2010-04-30 | 2013-08-01 | Ntt Docomo, Inc. | Mobile terminal device and radio base station apparatus |
| CN102006111A (en) * | 2010-11-03 | 2011-04-06 | 北京邮电大学 | Codebook generating method and device of pre-coding in multiple-input-multiple-output (MIMO) system |
| US20140029465A1 (en) * | 2011-04-15 | 2014-01-30 | Ntt Docomo, Inc. | Mobile terminal apparatus, radio base station apparatus, radio communication method and radio communication system |
Non-Patent Citations (3)
| Title |
|---|
| HUAWEI: "《DL codebook for 8 TX》", 《3GPP TSG RAN WG1#61; R1-103105 DL CODEBOOK FOR 8 TX, 3RD GENERATION PARTNERSHIP PROJECT(3GPP)》 * |
| 俞锦: "《一种新型的LTE-A双码本设计及其鲁棒性分析》", 《万方数据企业知识服务平台》 * |
| 王浩: "《一种用于MIMO***的双码本预编码方法》", 《数字通信》 * |
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