Invention Grant
- Patent Title: Rate selection for eigensteering in a MIMO communication system
- Patent Title (中): MIMO通信系统中本征导向的速率选择
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Application No.: US11128843Application Date: 2005-05-12
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Publication No.: US07872981B2Publication Date: 2011-01-18
- Inventor: Arnaud Meylan , Santosh Abraham , Sanjiv Nanda
- Applicant: Arnaud Meylan , Santosh Abraham , Sanjiv Nanda
- Applicant Address: US CA San Diego
- Assignee: Qualcomm Incorporated
- Current Assignee: Qualcomm Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Qualcomm Patent Group
- Agent Thien T. Nguyen; James Hunt Yancey, Jr.
- Main IPC: G01R31/08
- IPC: G01R31/08 ; H04W4/00 ; H03B1/02 ; H04B17/00

Abstract:
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.
Public/Granted literature
- US20060256761A1 Rate selection for eigensteering in a MIMO communication system Public/Granted day:2006-11-16
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