Title:
チャネル状態情報の取得方法及びシステム
Document Type and Number:
Japanese Patent JP5715649
Kind Code:
B2
Abstract:
An eNode B and User equipment are disclosed in the present invention. The eNode B includes: a receiving module, configured to receive codebook index information and information about a total number of layers sent by UE, wherein the codebook index information comprises one of following information: second-class codebook index l ; and first-class codebook index i and index parameter j; a codebook obtaining module, configured to obtain a codeword in a manner of inquiring of a preset codebook list or in a manner of inquiring of the preset codebook list and combining with calculation according to the codebook index information and the information about the total number of layers; and obtain the codeword by way of a rotation algorithm or phase adjustment algorithm in the manner of inquiring of the preset codebook list and combining with calculation. In the present invention, on one hand, the network side can be compatible to use the channel state information format of the release 8 (R8) to achieve the multi-antenna function of the R8; on the other hand, the network side significantly reduces quantization errors by way of a new codebook of R10, thereby greatly enhancing the performance of the MU-MIMO system.
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Inventors:
Chen, Ijan
Shu, Jun
Die, bo
Li, Rue
Jun Feng
Shu, Jun
Die, bo
Li, Rue
Jun Feng
Application Number:
JP2012552233A
Publication Date:
May 13, 2015
Filing Date:
November 02, 2010
Export Citation:
Assignee:
ZTE CORPORATION
International Classes:
H04J99/00; H04W16/28; H04W24/10; H04W72/04
Domestic Patent References:
| JP2009530898A |
Other References:
Huawei,Extensions to Rel-8 type CQI/PMI/RI feedback using double codebook structure[online], 3GPP TSG-RAN WG1#59b R1-100251,インターネット,2010年 1月18日
Attorney, Agent or Firm:
Eiichi Maruyama