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Wireless data communication system and wireless data communication method

  • US 20060198461A1
  • Filed: 08/26/2005
  • Published: 09/07/2006
  • Est. Priority Date: 03/02/2005
  • Status: Active Grant
First Claim
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1. A wireless data communication system which executes data communication between a transmitter having M transmission antennas and a receiver having N reception antennas, wherein:

  • said transmitter includes a modulator that modulates a transmission signal associated with each of the transmission antennas and a demodulator that modulates a reception signal from each of the reception antennas;

    a training signal is transmitted to said receiver from said transmitter;

    based on an in-phase component and a quadrature component of M transmission signal vectors, and an in-phase component and a quadrature component of N transmission signal vectors, an arithmetic operation is performed on a 2N-row-2M-column transfer matrix which shows a relationship between a transmission signal vector and a reception signal vector which each contain deviation in an in-phase component and deviation in a quadrature component that occur during a modulation process in said modulator and deviation in an in-phase component and deviation in a quadrature component that occurs during a demodulation process in said demodulator; and

    after said training signal is transmitted, according to data to be transmitted to said receiver from said transmitter, an arithmetic operation is performed on the in-phase component and the quadrature component to be input to said demodulator based on said transfer matrix.

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