Precoder structure for MIMO precoding

  • US 9,831,930 B2
  • Filed: 04/26/2016
  • Issued: 11/28/2017
  • Est. Priority Date: 04/07/2010
  • Status: Active Grant
First Claim
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1. A method in a wireless communication transceiver, wherein another transceiver precodes transmissions to the transceiver based at least in part on the transceiver sending channel state information to the other transceiver that includes precoder information and wherein the method comprises:

  • selecting entries from one or more codebooks as a selected conversion precoder and a selected tuning precoder, or as a selected overall precoder corresponding to a selected conversion precoder and a selected tuning precoder;

    transmitting indications of the selected entries as said precoder information included in the channel state information;

    wherein the one or more codebooks include entries comprising conversion precoders and entries comprising corresponding tuning precoders, or include entries comprising a plurality of overall precoders, with each overall precoder comprising a product of a conversion precoder and a tuning precoder; and

    wherein each said conversion precoder comprises a block diagonal matrix in which each block comprises a Discrete Fourier Transform (DFT)-based antenna-subgroup precoder that corresponds to a subgroup of transmit antenna.

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