DTV signal with GCR components in plural-data-segment frame headers and receiver apparatus for such signal
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United States of America Patent
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May 2, 2006
Issued Date -
N/A
app pub date -
May 11, 1999
filing date -
May 12, 1998
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Abstract
A DTV signal has a plural-data-segment frame header including complementary first and second ghost-cancellation reference signals differentially delayed by the duration of two NTSC horizontal scan lines. A receiver for such DTV signal has an adaptive equalizer for baseband symbol code with kernel weights calculated by a computer operative on the equalizer response after comb filtering. The comb filter combines the equalizer response as differentially delayed by the duration of two NTSC horizontal scan lines to cancel artifacts of co-channel NTSC interference in the comb filtered equalizer response supplied to the computer. This reduces the undesirable influence of such artifacts on equalization to reduce intersymbol interference.
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