Title :
A compact spectrum and interference-resistant digital video transmission system
Author :
Kubota, Shuji ; Morikura, Masahiro ; Enomoto, Kiyoshi ; Kato, Shuzo
Author_Institution :
NTT Radio Commun. Syst. Lab., Kanagawa, Japan
Abstract :
A compact-spectrum and interference-resistant digital video transmission system which employs an offset QPSK (quadrature-phase shift keying) modulation scheme and a 32-Mb/s video codec followed by a high-coding-rate and high-gain Viterbi decoder is proposed. The system achieves a signal-to-noise ratio of higher than 52 dB (weighted) and a protection ratio of 20 dB higher against cochannel interference than that of conventional analog FM systems. It can transmit a high-quality NTSC video signal over nonlinearity amplified narrow-bandwidth satellite channels with high-security digital encryption
Keywords :
codecs; decoding; digital communication systems; interference suppression; phase shift keying; satellite relay systems; video signals; 32 Mbit/s; NTSC video signal; cochannel interference; compact spectrum; high-coding-rate; high-gain Viterbi decoder; interference-resistant digital video transmission system; nonlinearity amplified narrow-bandwidth satellite channels; offset QPSK; protection ratio; quadrature-phase shift keying; signal-to-noise ratio; video codec; Decoding; Digital modulation; Interchannel interference; Modulation coding; Protection; Quadrature phase shift keying; Satellites; Signal to noise ratio; Video codecs; Viterbi algorithm;
Conference_Titel :
Global Telecommunications Conference and Exhibition 'Communications Technology for the 1990s and Beyond' (GLOBECOM), 1989. IEEE
Conference_Location :
Dallas, TX
DOI :
10.1109/GLOCOM.1989.64239
