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High data rate closed loop MIMO scheme combining transmit diversity and data multiplexing

  • US 7,876,854 B2
  • Filed: 10/21/2009
  • Issued: 01/25/2011
  • Est. Priority Date: 11/21/2001
  • Status: Expired due to Fees
First Claim
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1. A wireless transmitter comprising:

  • A. a symbol mapping circuitry having a data symbol output;

    B. a serial to parallel circuitry having an input coupled with the data symbol output and having plural symbol stream outputs;

    C. multiplier circuits, one for each symbol stream output, each multiplier circuit having an symbol input, an antenna weight input, and an output, the symbol input being coupled with a symbol stream output;

    D. antenna units, each coupled with the output of one multiplier circuit; and

    E. an antenna weight circuitry having plural antenna weight outputs, each antenna weight output being coupled with one antenna weight input, the antenna weight circuitry producing weight signals on the antenna weight outputs in accordance with rectangular matrix that corresponds to a diagonal M.times.M block matrix of (P by M).times.1 vectors, where each (P by M).times.1 vector corresponds to weights for each symbol stream, where P represents a number of antennas and M represents symbol stream outputs.

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