Invention Grant
- Patent Title: Structured codebook for 4TX multiple antenna systems
- Patent Title (中): 4TX多天线系统的结构化码本
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Application No.: US13112647Application Date: 2011-05-20
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Publication No.: US08229012B2Publication Date: 2012-07-24
- Inventor: Mohammad A. Khojastepour
- Applicant: Mohammad A. Khojastepour
- Applicant Address: US NJ Princeton
- Assignee: NEC Laboratories America, Inc.
- Current Assignee: NEC Laboratories America, Inc.
- Current Assignee Address: US NJ Princeton
- Agent Joseph Kolodka; Akitaka Kimura
- Main IPC: H04L5/12
- IPC: H04L5/12

Abstract:
Methods and apparatus are disclosed for applying successive multi-rank beamforming strategies (e.g., successive precoding strategies) for the design of precoders over a set of parallel channels. Successive beamforming is applied to a narrow band channel model and is also applied for finer quantization of a single beamforming vector (e.g., recursive beamforming). A first embodiment provides the optimal approach with high complexity. An alternative embodiment provides successive beamforming for near optimal precoding selection with medium complexity. A low complexity method for precoder selection is also provided wherein a channel representative matrix for the set of parallel channels is determined and successive beamforming on the calculated channel representative is applied.
Public/Granted literature
- US20110274189A1 Structured Codebook for 4TX Multiple Antenna Systems Public/Granted day:2011-11-10
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