发明申请
US20060039489A1 Method and apparatus for providing closed-loop transmit precoding
审中-公开
用于提供闭环发射预编码的方法和装置
- 专利标题: Method and apparatus for providing closed-loop transmit precoding
- 专利标题(中): 用于提供闭环发射预编码的方法和装置
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申请号: US11182083申请日: 2005-07-15
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公开(公告)号: US20060039489A1公开(公告)日: 2006-02-23
- 发明人: Muhammad Ikram , Eko Onggosanusi , Vasanthan Raghavan , Anand Dabak , Srinath Hosur , Badrinarayanan Varadarajan
- 申请人: Muhammad Ikram , Eko Onggosanusi , Vasanthan Raghavan , Anand Dabak , Srinath Hosur , Badrinarayanan Varadarajan
- 申请人地址: US TX Dallas
- 专利权人: Texas Instruments Incorporated
- 当前专利权人: Texas Instruments Incorporated
- 当前专利权人地址: US TX Dallas
- 主分类号: H04K1/10
- IPC分类号: H04K1/10 ; H04L27/04 ; H04L1/02
摘要:
A method for providing closed-loop transmit precoding between a transmitter and a receiver, includes defining a codebook that includes a set of unitary rotation matrices. The receiver determines which preceding rotation matrix from the codebook should be used for each sub-carrier that has been received. The receiver sends an index to the transmitter, where the transmitter reconstructs the precoding rotation matrix using the index, and precodes the symbols to be transmitted using the preceding rotation matrix. An apparatus that employs this closed-loop technique is also described.