Title :
A (4,12) circular signal set for satellite transmission
Author_Institution :
British Telecom. Labs., Ipswich, UK
Abstract :
Presents the results of a computer simulation study of a spectrally efficient modem for digital satellite transmission. The modem transmits a (4,12) circular set signal (i.e. with a 16-ary symbol alphabets) over a satellite link, where the high-power amplifier (HPA) at the earth station transmitter introduces nonlinear signal distortion into the signal. A comparison on performances is made between the signal and a 16-ary quadrature-amplitude-modulated (16-ary QAM) signal with a rectangular signal set. The results are used to select the preferred signal set for spectrally efficient transmission over satellite links
Keywords :
digital communication systems; digital simulation; modems; modulation; satellite relay systems; 16-ary QAM signal; 16-ary symbol alphabets; circular signal set; computer simulation study; digital satellite transmission; earth station transmitter; high-power amplifier; modem; nonlinear signal distortion; rectangular signal set; satellite link; spectrally efficient transmission;
Conference_Titel :
Telecommunications, 1989. Second IEE National Conference on
Conference_Location :
York
