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Spatial spreading in a multi-antenna communication system

  • US 8,204,149 B2
  • Filed: 12/09/2004
  • Issued: 06/19/2012
  • Est. Priority Date: 12/17/2003
  • Status: Active Grant
First Claim
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1. A method of providing data for transmission in a wireless multiple-input multiple-output (MIMO) communication system, comprising:

  • processing data to obtain at least one block of data symbols;

    spatially processing the at least one block of data symbols with a plurality of steering matrices to obtain a plurality of sequences of transmit symbols each corresponding to a different portion of the at least one block of data symbols;

    providing the plurality of sequences of transmit symbols to a plurality of transmit antennas for transmission in a frame, wherein the plurality of steering matrices randomize an effective MIMO channel observed by a receiving entity for the at least one block of data symbols;

    partitioning the at least one block of data symbols into a plurality of subblocks of data symbols; and

    selecting a steering matrix for each subblock of data symbols, andwherein the spatially processing the at least one block of data symbols comprises spatially processing each subblock of data symbols with a steering matrix of the plurality selected for that subblock.

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