Invention Grant
US07917176B2 Structured codebook and successive beamforming for multiple-antenna systems
有权
结构化码本和多天线系统的连续波束成形
- Patent Title: Structured codebook and successive beamforming for multiple-antenna systems
- Patent Title (中): 结构化码本和多天线系统的连续波束成形
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Application No.: US11674330Application Date: 2007-02-13
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Publication No.: US07917176B2Publication Date: 2011-03-29
- Inventor: Mohammad Ali Khojastepour , Xiaodong Wang , Mohammad Madihian
- Applicant: Mohammad Ali Khojastepour , Xiaodong Wang , Mohammad Madihian
- Applicant Address: US NJ Princeton
- Assignee: NEC Laboratories America, Inc.
- Current Assignee: NEC Laboratories America, Inc.
- Current Assignee Address: US NJ Princeton
- Agency: Brosemer, Kolefas & Associates
- Agent Joseph Kolodka
- Main IPC: H04B1/02
- IPC: H04B1/02

Abstract:
A quantized multi-rank beamforming scheme for multiple-antenna systems such as a multiple-input-multiple-output (MIMO) wireless downlink. User equipment (UE) estimates downlink channel and transmit power and determines rank and power allocations. A quantized beamforming matrix is then determined by the UE using successive beamforming. The UE also determines channel quality indices (CQI) which it feeds-back to the wireless downlink base station along with the index of the quantized beamforming matrix. The base station uses the CQI information to select a UE for scheduling of downlink transmission and the quantized beamforming matrix index received from the selected UE to beamform the downlink transmission to the UE. Base station overhead and is minimized while providing near-optimal performance given the constraints of a limited feed-back channel and computational complexity of the UE.
Public/Granted literature
- US20070191066A1 STRUCTURED CODEBOOK AND SUCCESSIVE BEAMFORMING FOR MULTIPLE-ANTENNA SYSTEMS Public/Granted day:2007-08-16
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