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CHANNEL EQUALIZER AND METHOD OF PROCESSING BROADCAST SIGNAL IN DTV RECEIVING SYSTEM

  • US 20070230580A1
  • Filed: 02/12/2007
  • Published: 10/04/2007
  • Est. Priority Date: 02/10/2006
  • Status: Active Grant
First Claim
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1. A method of processing a broadcast signal in a DTV receiving system, the method comprising:

  • converting normal data in a broadcast signal into frequency domain data, wherein a known data sequence is periodically repeated in the normal data;

    estimating channel impulse response during intervals in which first and second known data sequences located before and after each normal data block in the broadcast signal are received;

    calculating an average value of the estimated channel impulse responses;

    converting the average value into frequency domain data;

    calculating equalization coefficients using the average value in the frequency domain;

    compensating channel distortion of each normal data block in the frequency domain by multiplying each normal data block with the equalization coefficients; and

    converting the compensated normal data block into time domain data.

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