Title :
Performance of concatenated trellis-coded 16QAM with pilot symbol aided technique in the presence of fading
Author :
Tsie, K.Y. ; Aghvami, A.H.
Author_Institution :
King´´s Coll., London Univ., UK
Abstract :
The performance of a concatenated trellis-coded 16QAM modem is presented for Rayleigh, Rician and shadowed land mobile satellite communication channels. For the concatenated coded modulation scheme, the outer code is a rate of 223/255 Reed-Solomon code and the inner code is a rate of 3/4, 8-state trellis-coded modulation (TCM). Time-multiplexed TCM codecs are used for interleaving and a pilot symbol aided method is used to provide amplitude and phase references to the receiver, in order that coherent detection can be employed. Error performance is compared with TCM 16QAM and uncoded 8PSK systems. In addition to data transmission, the system performance for digital speech transmission is also evaluated by taking into account of decoding delay and interleaving
Keywords :
Reed-Solomon codes; amplitude modulation; codecs; decoding; fading; modems; telecommunication channels; trellis codes; 8-state trellis-coded modulation; Rayleigh channel; Reed-Solomon code; Rician channel; coherent detection; concatenated coded modulation; concatenated trellis-coded 16QAM modem; data transmission; decoding delay; digital speech transmission; fading; inner code; interleaving; outer code; phase references; pilot symbol aided technique; shadowed land mobile satellite communication channels; system performance; time multiplexed TCM codecs; uncoded 8PSK systems;
Conference_Titel :
Satellite Communications - ECSC-3, 1993., 3rd European Conference on
Conference_Location :
Manchester
Print_ISBN :
0-85296-603-2
