Title :
A trellis coded 16-QAM modem for land mobile communications
Author :
Fines, P. ; Aghvami, A.H.
Author_Institution :
King´´s Coll., London, UK
Abstract :
The performance of low bit rate (10.8 Kb/s) 8-PSK and trellis coded modulation (TCM) 16-QAM modems operating over a Rician fading land mobile satellite channel is evaluated and compared. Considerable TCM coding gain is obtained with the aid of a pilot symbol sequence, which allows successful coherent detection under severe fading, and diversity in time by interleaving using several multiplexed TCM codecs. The proposed modem is well suited for fully digital implementation
Keywords :
amplitude modulation; codecs; digital radio systems; diversity reception; fading; mobile radio systems; modems; satellite relay systems; 10.8 kbit/s; 8-PSK; Rician fading; coding gain; coherent detection; digital implementation; diversity; interleaving; land mobile communications; multiplexed TCM codecs; pilot symbol sequence; satellite channel; trellis coded 16-QAM modem;
Conference_Titel :
Land Mobile Satellite Systems, IEE Colloquium on
Conference_Location :
London
