Invention Grant
- Patent Title: Codeword permutation and reduced feedback for grouped antennas
- Patent Title (中): 分组天线的代码字排列和减少的反馈
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Application No.: US11850451Application Date: 2007-09-05
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Publication No.: US08798201B2Publication Date: 2014-08-05
- Inventor: Byoung-Hoon Kim
- Applicant: Byoung-Hoon Kim
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agent Kenyon S. Jenckes
- Main IPC: H04L27/00
- IPC: H04L27/00

Abstract:
Systems and methodologies are described that facilitate reducing feedback required to be transmitted on a reverse link channel in response to a forward link data transmission for multiple-input multiple-output (MIMO) wireless communication systems. In a per group rate control MIMO system, a codeword can be linked to more than one layer. Codewords are mixed among antennas in the MIMO systems based upon a symmetric permutation of antennas groups. Further, codewords are transmitted in permuted form so that receivers can reduce feedback to a base channel quality indicator (CQI) and a differential CQI. Additionally, spatial diversity is increased for each codeword improving the robustness of the system against inaccurate CQI reports.
Public/Granted literature
- US20080080641A1 CODEWORD PERMUTATION AND REDUCED FEEDBACK FOR GROUPED ANTENNAS Public/Granted day:2008-04-03
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