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Apparatus and method for space-time-frequency block coding for increasing performance

  • US 20060039500A1
  • Filed: 08/17/2005
  • Published: 02/23/2006
  • Est. Priority Date: 08/17/2004
  • Status: Active Grant
First Claim
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1. A transmitter with three transmit antennas in a communication system using a space-time-frequency block coding scheme, comprising:

  • a pre-coder for pre-coding a symbol vector of an input symbol sequence by multiplying the symbol vector by e

    , θ

    being a phase rotation angle, and outputting pre-coded symbols; and

    a space-time-frequency block code (STFBC) mapper for selecting an STFBC using a permutation matrix in which the following matrices A, B and C are arranged in a predetermined order, mapping the pre-coded symbols to the transmit antennas according to the selected STFBC, and transmitting the mapped symbols through the transmit antennas, A=[s1-s2*00s2s1*s3-s4*00s4s3*]B=[s1-s2*s3-s4*s2s1*0000s4s3*]C=[s1-s2*0000s3-s4*s2s1*s4s3*]where a row represents symbols for a corresponding antenna and a column represents symbols mapped with a subcarrier.

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