Channel equalizer and method of processing broadcast signal in receiving system
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United States of America Patent
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Sep 14, 2010
Grant Date -
Sep 6, 2007
app pub date -
Mar 2, 2007
filing date -
Mar 2, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A channel equalizer includes an overlap unit, an estimator, a calculator, a compensator, and a save unit. The overlap unit overlaps a group of data packets in a broadcast signal. The group data packets include a head, a body, and a tail, and a known data sequence is periodically included in the body. The estimator estimates a CIR of each data region the body using the known data sequence, and it further estimates CIRs of data regions in the head or tail using the CIRs obtained for the data regions in the body. The calculator calculates equalization coefficients based on the CIRs estimated by the estimator, and the compensator compensates channel distortion of the overlapped data using the equalization coefficients. The save unit saves the compensated data.
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