A New NTSC Co-Channel Interference Rejection Filter with Coded 6-VSB Modulation for Improved ATV Coverage

Samir N. Hulyalkar, Monisha Ghosh, Lee-Fang Wei, David A. Bryan, Carlo Basile, Ahmad K. Aman, Robert L. Cupo, George J. Kustka

The ATSC ATV standard and its service area predictions assume the use of a comb filter at the receiver. However, such a filter is not required by the ATV standard. There are also unresolved questions about the efficacy of the comb filter. We describe a new system, including an NTSC co-channel interference rejection filter with coded 6-VSB modulation, of comparable complexity, which offers improved ATV service area. Coverage analysis results demonstrate that the system provides much better co-channel performance today with a comparable carrier-to-noise (C/N) threshold and better threshold performance when NTSC transmission ceases in the future. The new system obviates concerns about the reliability of the comb filter under conditions of noise, interference, and multipath.

Published: 1996-10
Content type: Original Research
DOI: 10.5594/M001261
ISBN: 978-1-61482-947-8