Techniques for minimizing co-channel interference in a received

Details Techniques for minimizing co-channel interference in a received Techniques for minimizing co-channel interference in a received

1995-06-07

1996-11-12

Kostak, Victor R.

Television

Plural transmitter system considerations

348470, H04N 538

Patent

active

055744966

ABSTRACT:
A technique for enhancing the robustness of an ATV transmission system in the presence of NTSC or ATV co-channel interference comprises positioning the ATV signal relative to the co-channel NTSC/ATV signal to reduce interference into the ATV receiver. In a preferred embodiment, the ATV signal is positioned relative to a co-channel NTSC signal such that the demodulated difference f.sub.v -f.sub.p in the ATV receiver is equal to 70.5 f.sub.seg, where f.sub.v is the NTSC visual carrier frequency, f.sub.p is the ATV pilot carrier frequency and f.sub.seg is the ATV segment repetition rate, and relative to a co-channel ATV signal such that their respective pilot frequencies differ by an amount equal to 1.5 f.sub.seg.

REFERENCES:
patent: 4958230 (1990-09-01), Jonnalagadda et al.
patent: 5087975 (1992-02-01), Citta et al.
patent: 5408262 (1995-04-01), Kim et al.

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