Invention Grant
- Patent Title: Method of precoding with a codebook for a wireless system
- Patent Title (中): 用于无线系统的码本进行预编码的方法
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Application No.: US13524077Application Date: 2012-06-15
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Publication No.: US08351986B2Publication Date: 2013-01-08
- Inventor: Mohammad Ali Khojastepour
- Applicant: Mohammad Ali Khojastepour
- Applicant Address: US NJ Princeton
- Assignee: NEC Laboratories America, Inc.
- Current Assignee: NEC Laboratories America, Inc.
- Current Assignee Address: US NJ Princeton
- Agent Akitaka Kimura; Joseph Kolodka
- Main IPC: H04M1/00
- IPC: H04M1/00

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
- US20120269279A1 Method of Precoding with a Codebook for a Wireless System Public/Granted day:2012-10-25
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