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METHOD FOR DETERMINING PRECODING MATRIX AND CORRESPONDING COMMUNICATION METHODS AND DEVICES

  • US 20130170578A1
  • Filed: 08/24/2011
  • Published: 07/04/2013
  • Est. Priority Date: 09/16/2010
  • Status: Active Grant
First Claim
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1. A method for determining precoding matrix for the sub-band precoding in a transmitter, wherein the transmitter has M transmitting antennas, and the method comprises:

  • determining an optimized first matrix W1 according to wideband and/or long-term channel properties, with the first matrix W1 corresponding to wideband and/or long-term channel properties;

    multiplying the optimized first matrix W1 with each second matrix W2 in a second codebook, so as to obtain a plurality of candidate precoding matrices, with the second matrix W2 corresponding to frequency-selective and/or short-term channel properties;

    selecting an optimized one from the plurality of candidate precoding matrices for precoding the data to be transmitted, according to a frequency selection and/or a short-term channel state information;

    wherein, the amount of DFT beams is increased to improve the spatial resolution;

    a diagonal matrix is involved in said first matrix W1; and

    phrase adjustment is involved in said second matrix W2, so as to guarantee the adjusted phrase is evenly distributed among the whole phrase space.

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