Invention Grant
US08798201B2 Codeword permutation and reduced feedback for grouped antennas 有权
分组天线的代码字排列和减少的反馈

  • 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
  • Application No.: US11850451
    Application Date: 2007-09-05
  • Publication No.: US08798201B2
    Publication 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
Codeword permutation and reduced feedback for grouped antennas
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.
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