Title:
チャネル状態情報を送信するための方法及び装置
Document Type and Number:
Japanese Patent JP6740468
Kind Code:
B2
Abstract:
Disclosed in the present invention are a method and a device for transmitting channel state information, for solving the problem that due to the limitation of a codebook structure, the prior art can only provide channel state information with limited precision and it is not suitable for a base station to use a transmission scheme of an advanced preprocessing algorithm. The method comprises: a terminal determining a basis matrix according to a candidate wave beam vector set, the basis matrix being a matrix formed by N wave beam vectors from the candidate wave beam vector set, the N being a positive integer; the terminal determining a combined coefficient matrix according to the basis matrix and a channel state parameter; the terminal feeding back the identification information of the basis matrix and the combined coefficient matrix to a base station. The invention effectively improves the precision of channel state information feedback, and improves the performance of multi-antenna transmission, especially multiple user-multiple input multiple output (MU-MIMO) transmission.
Inventors:
Gao, Chiubin
Chen, Runhua
Rakesh, Tamurakal
Lee, Hui
Juan, Chiupin
Chen, Runhua
Rakesh, Tamurakal
Lee, Hui
Juan, Chiupin
Application Number:
JP2019517290A
Publication Date:
August 12, 2020
Filing Date:
July 12, 2017
Export Citation:
Assignee:
China Academy of Telecommunications Technology
International Classes:
H04W24/10; H04B7/0413; H04B7/0417; H04B7/0452; H04B7/0456; H04B7/06; H04W16/28
Foreign References:
| US20160142117 | ||||
| US20130064129 | ||||
| US20140177745 |
Other References:
CATT,Discussion on advanced CSI reporting and interference measurement enhancement [online],3GPP TSG-RAN WG1#86 R1-166448,2016年 8月13日,インターネット
Huawei,Feedback of Long Term Channel Information for Adaptive Codebook[online],3GPP TSG-RAN WG1#60 R1-101062,2010年 2月19日,インターネット
ITRI,Discussion of CSI reporting based on beamformed CSI-RS [online],3GPP TSG-RAN WG1#81 R1-152943,2015年 5月15日,インターネット
Nokia, Alcatel-Lucent Shanghai Bell,On procedures for beam selection and feedback signaling [online],3GPP TSG-RAN WG1#86 R1-167287,2016年 8月12日,インターネット
Huawei,Feedback of Long Term Channel Information for Adaptive Codebook[online],3GPP TSG-RAN WG1#60 R1-101062,2010年 2月19日,インターネット
ITRI,Discussion of CSI reporting based on beamformed CSI-RS [online],3GPP TSG-RAN WG1#81 R1-152943,2015年 5月15日,インターネット
Nokia, Alcatel-Lucent Shanghai Bell,On procedures for beam selection and feedback signaling [online],3GPP TSG-RAN WG1#86 R1-167287,2016年 8月12日,インターネット
Attorney, Agent or Firm:
Hiraki International Patent Office