Quantized precoding over a set of parallel channels

Details Quantized precoding over a set of parallel channels Quantized precoding over a set of parallel channels

2007-03-29

2010-11-23

Tran, Phuc (Department: 2471)

Multiplex communications

Communication over free space

Combining or distributing information via frequency channels

C370S329000, C455S067110

Reexamination Certificate

active

07839835

ABSTRACT:
Methods and apparatus are disclosed for applying successive multi-rank beamforming strategies (e.g., successive preceding 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 preceding 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.

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patent: 2007/0064632 (2007-03-01), Zheng et al.
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