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OFDM receiver apparatus

  • US 20040258171A1
  • Filed: 03/31/2004
  • Published: 12/23/2004
  • Est. Priority Date: 03/31/2003
  • Status: Active Grant
First Claim
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1. An OFDM receiver apparatus to receive an OFDM signal, comprising:

  • a receiver to receive an OFDM signal having a plurality of sub-carriers every symbol;

    a distortion estimator which estimates a distortion using each sub-carrier of the sub-carriers of the OFDM signal to generate channel distortion information;

    a distortion compensator which subjects the sub-carrier to distortion compensation according to a control signal to generate a distortion-compensated sub-carrier;

    a demodulator to demodulate the distortion-compensated sub-carrier;

    a phase distortion estimator to generate first phase distortion information indicating a phase distortion of each sub-carrier every symbol, using the distortion-compensated sub-carrier and the distortion information;

    a weighting synthesizer to weight the first phase distortion information by a plurality of weighting factors with time function over a plurality of symbol intervals and then synthesize the first phase distortion information, to generate a plurality of second phase distortion information; and

    a control signal generator to generate the control signal using the distortion information and the plurality of second phase distortion information.

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