Channel equalizer and method of processing broadcast signal...

Details Channel equalizer and method of processing broadcast signal... Channel equalizer and method of processing broadcast signal...

2007-03-07

2010-11-02

Payne, David C (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

C375S229000, C375S230000

Reexamination Certificate

active

07826524

ABSTRACT:
A channel equalizer for use in a receiving system includes an overlap unit, a first estimator, an interpolator, and a second estimator. The overlap unit overlaps a group of normal data packets including a head, a body, and a tail, and a known data region is periodically repeated in the body. The first estimator estimates CIRs of the known data regions according to a first algorithm, and the interpolator estimates CIRs of normal data regions in the body by interpolating the estimated CIRs of the known data regions. The second estimator estimates CIRs of normal data regions in the head and tail according to a second algorithm different from the first algorithm. A calculator calculates equalization coefficients based on the estimated CIRs and a compensator multiplies the overlapped data with the coefficients. A save unit saves the compensated data.

REFERENCES:
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patent: 6573947 (2003-06-01), Oh
patent: 2001/0033614 (2001-10-01), Hudson
patent: 2002/0154709 (2002-10-01), Choi et al.
patent: 2004/0090997 (2004-05-01), Choi et al.
patent: 2007/0230580 (2007-10-01), Kim et al.
patent: 2005/006759 (2005-01-01), None
patent: 2005/115001 (2005-12-01), None

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