Title :
CNR requirements for subcarrier-multiplexed multichannel video FM transmission in optical fibre
Author :
Mendis, F.V.C. ; Rosher, P.A.
Author_Institution :
British Telecom Res. Labs., Ipswich, UK
Abstract :
Clarifies the CNR improvement factors applicable to FM video signals provided via satellite links employing energy dispersal waveforms, noting that a CNR of 17.5 dB is required to achieve a weighted SNR of 56 dB for a 525-line C-band NTSC signal with an energy dispersal deviation of 2.5 MHz, accommodated in a 36 MHz satellite transponder channel.
Keywords :
cable television; community antenna television; frequency division multiplexing; frequency modulation; optical communication; optical fibres; random noise; video signals; 17.5 dB; 36 MHz; 36 MHz satellite transponder channel; 525-line C-band NTSC signal; 56 dB; CNR improvement factors; CNR requirements; FM video signals; carrier/noise ratio; energy dispersal waveforms; microwave subcarrier multiplexing CATV; multichannel video FM transmission; optical fibre; satellite links; signal noise ratio; subcarrier-multiplexed; weighted SNR;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19890052
