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...

2010-12-06

2011-11-08

Fan, Chiem M (Department: 2611)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S229000, C375S231000, C375S232000, C375S240010, C375S240020, C348S607000, C348S608000, C348S611000, C348S612000, C348S614000, C348S723000, C348S724000, C348S725000, C348S726000, C348S728000

Reexamination Certificate

active

08054891

ABSTRACT:
A channel equalizer includes a first transformer, an estimator, an average calculator, a second transformer, a coefficient calculator, a compensator, and a third transformer. The first transformer converts normal data into frequency domain data, where a known data sequence is periodically repeated in the normal data. The estimator estimates channel impulse responses (CIR) during known data intervals adjacent to each normal data block. The average calculator calculates an average value of the CIRs. The second transformer converts the average value into frequency domain data. The coefficient calculator calculates equalization coefficients using the average value, and the compensator compensates channel distortion of each normal data block using the coefficients. The third transformer converts the compensated data block into time domain data.

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