Patent ID: 6201564
Filing Date: 2001-03-13
Classification: H04N

Abstract:
A method of operating a receiver for digital television signals subject to co-channel interference from analog television signals, said method comprising the steps of:converting said digital television signal as received to a stream of digital samples of an intermediate-frequency signal;demodulating said stream of digital samples of an intermediate-frequency signal to generate a baseband symbol code signal accompanied at times by artifacts of interference from a co-channel analog television signal;symbol decoding said baseband symbol code signal;comb filtering said baseband symbol code signal for suppressing said artifacts of interference from said co-channel analog television signal in said baseband symbol code signal before said symbol decoding thereof; andchannel equalization filtering said baseband symbol code signal before said symbol decoding thereof, for conforming the overall channel response resulting from said steps of comb filtering and channel equalization filtering to the comb-filter response to a match-filtered transmission channel.