Title :
The DSC-HDTV interference rejection system
Author :
Eilers, Carl ; Fockens, Pieter
Author_Institution :
Zenith Electronics Corp., Glenview, IL, USA
fDate :
8/1/1992 12:00:00 AM
Abstract :
An efficient system for rejection of NTSC interference in digital spectrum-compatible HDTV (DSC-HDTV) receivers is described. DSC-HDTV receivers operating in a terrestrial simulcast situation need operational immunity against NTSC cochannel interference. Reduced channel spacing and an NTSC signal 12-15 dB stronger than the DSC-HDTV signal cause serious interference into a DSC-HDTV receiver by an NTSC cochannel. Interference rejection can be provided by a receiver comb filter with nulls near all three NTSC carriers. The correlative action caused by the comb filter was complemented by digital precoding
Keywords :
digital signals; high definition television; interference suppression; radiofrequency filters; television interference; television receivers; HDTV receivers; NTSC carriers; NTSC cochannel interference; channel spacing; correlative action; digital precoding; digital spectrum-compatible HDTV; filter nulls; interference rejection system; operational immunity; receiver comb filter; terrestrial simulcast; Channel spacing; Circuits; Digital filters; Electrons; FCC; HDTV; Interchannel interference; Intersymbol interference; Radio frequency; TV broadcasting;
Journal_Title :
Consumer Electronics, IEEE Transactions on
