发明授权
- 专利标题: Rate selection for eigensteering in a MIMO communication system
- 专利标题(中): MIMO通信系统中本征导向的速率选择
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申请号: US11128843申请日: 2005-05-12
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公开(公告)号: US07872981B2公开(公告)日: 2011-01-18
- 发明人: Arnaud Meylan , Santosh Abraham , Sanjiv Nanda
- 申请人: Arnaud Meylan , Santosh Abraham , Sanjiv Nanda
- 申请人地址: US CA San Diego
- 专利权人: Qualcomm Incorporated
- 当前专利权人: Qualcomm Incorporated
- 当前专利权人地址: US CA San Diego
- 代理机构: Qualcomm Patent Group
- 代理商 Thien T. Nguyen; James Hunt Yancey, Jr.
- 主分类号: G01R31/08
- IPC分类号: G01R31/08 ; H04W4/00 ; H03B1/02 ; H04B17/00
摘要:
Techniques for selecting rates for data transmission on eigenmodes of a MIMO channel are described. An access point transmits an unsteered MIMO pilot via the downlink. A user terminal estimates the downlink channel quality based on the downlink unsteered MIMO pilot and transmits an unsteered MIMO pilot and feedback information via the uplink. The feedback information is indicative of the downlink channel quality. The access point estimates the uplink channel quality and obtains a channel response matrix based on the uplink unsteered MIMO pilot, decomposes the channel response matrix to obtain eigenvectors and channel gains for the eigenmodes of the downlink, and selects rates for the eigenmodes based on the estimated uplink channel quality, the channel gains for the eigenmodes, and the feedback information. The access point processes data based on the selected rates and transmits steered data and a steered MIMO pilot on the eigenmodes with the eigenvectors.
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