发明授权
US08634495B2 System, method and apparatus for mobile transmit diversity using symmetric phase difference
有权
使用对称相位差的移动发射分集的系统,方法和装置
- 专利标题: System, method and apparatus for mobile transmit diversity using symmetric phase difference
- 专利标题(中): 使用对称相位差的移动发射分集的系统,方法和装置
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申请号: US13589511申请日: 2012-08-20
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公开(公告)号: US08634495B2公开(公告)日: 2014-01-21
- 发明人: Haim Harel , Phil F. Chen , Sherwin J. Wang , Eduardo Abreu
- 申请人: Haim Harel , Phil F. Chen , Sherwin J. Wang , Eduardo Abreu
- 申请人地址: US CA Mountain View
- 专利权人: Google Inc.
- 当前专利权人: Google Inc.
- 当前专利权人地址: US CA Mountain View
- 代理机构: Gottlieb, Rackman & Reisman, PC
- 主分类号: H04L27/00
- IPC分类号: H04L27/00
摘要:
Communication is performed for a first communication device having a set of antenna elements. A quality-indication signal is received from a second communication device (e.g., a basestation). A complex weighting is calculated based on the quality-indication signal. A pre-transmission signal is modified based on the complex transmit diversity weighting to produce a set of modified-pre-transmission signals, wherein the modifications are symmetric by making approximately half the magnitude of the transmit diversity modification to one signal in a first direction, and approximately half the magnitude of the transmit diversity modification to the other signal in a second direction, opposite the first direction. Each modified pre-transmission signal from the set of modified-pre-transmission signals is uniquely associated with an antenna element from the set of antenna elements. The set of modified-pre-transmission signals is sent from the set of antenna elements to produce a transmitted signal.
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