Title :
Precoding technique for partial-response channels with applications to HDTV transmission
Author_Institution :
AT&T Bell Lab., Holmdel, NJ, USA
fDate :
1/1/1993 12:00:00 AM
Abstract :
An equivalent partial-response (PR) channel 1-Z-k arises in the envisioned terrestrial over-the-air broadcasting of digital high-definition television (HDTV) signals when a comb filter is used by an HDTV receiver to reduce the NTSC cochannel interference. The design of signal constellations and their associated precoders for this PR channel is considered. Besides PAM and square QAM, it is shown that generalized square and hexagonal constellations can also be used. Coded modulation and graceful degradation in the received signal quality are discussed. The results extended to a more general PR channel
Keywords :
amplitude modulation; high definition television; image coding; interference suppression; pulse amplitude modulation; telecommunication channels; television broadcasting; video signals; HDTV transmission; NTSC cochannel interference reduction; PAM; comb filter; design; digital high-definition television; generalized hexagonal constellations; generalized square constellations; partial-response channels; precoders; precoding technique; signal constellations; square QAM; terrestrial over-the-air broadcasting; Constellation diagram; Degradation; Digital filters; HDTV; Interchannel interference; Modulation coding; Quadrature amplitude modulation; Signal design; TV broadcasting; TV receivers;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
