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Multiple input multiple output multicarrier communication system and methods with quantized beamforming feedback

  • US 20050287978A1
  • Filed: 06/25/2004
  • Published: 12/29/2005
  • Est. Priority Date: 06/25/2004
  • Status: Active Grant
First Claim
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1. A multicarrier transmitter comprising:

  • transmit subcarrier beamformers to apply quantized transmit beamforming coefficients to a plurality of symbol-modulated subcarriers in a signal path before an inverse Fourier transform (IFFT) is performed on the symbol-modulated subcarriers, wherein the quantized transmit beamforming coefficients comprise predetermined numbers of bits for the subcarriers indicating amounts to weight an amplitude and shift a phase of an associated one or more subcarriers.

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