Title :
A recursive NTSC canceler to reduce co-channel interference into HDTV broadcasts
Author_Institution :
Hitachi America Ltd., Princeton, NJ, USA
Abstract :
A modulation-independent method of reducing NTSC (National Television System Committee) co-channel interference into ATV (advanced television) signals is described. The design utilizes tunable, parallel connected, narrow-bandwidth IIR (infinite impulse response) filters to isolate and cancel the major components of NTSC. The canceler has been fully simulated and tested against actual NTSC signals corrupting a 32 QAM (quadrature amplitude modulation) signal. The canceler, based on notch filtering the audio, chrominance, and luminance carrier components, can increase the probability of detection by a least 3 dB compared to the same demodulator without a canceler. The detection probability increases by 1 dB per each additional luminance sideband notch filter pair
Keywords :
amplitude modulation; digital filters; high definition television; interference suppression; notch filters; television broadcasting; television interference; 32 QAM; ATV signals; HDTV broadcasts; National Television System Committee; advanced television; audio carrier; chrominance carrier; co-channel interference reduction; infinite impulse response; luminance carrier; narrow bandwidth IIR filters; notch filtering; parallel connected filters; quadrature amplitude modulation; recursive NTSC canceler; tunable filters; Bandwidth; Broadcasting; Degradation; Equalizers; Frequency; HDTV; IIR filters; Interchannel interference; Interference cancellation; Signal design;
Journal_Title :
Consumer Electronics, IEEE Transactions on
