Title :
Systematic trellis-coded modulation
Author :
Katz, Ettie ; Stüber, Gordon L.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
Systematic trellis-coded modulation (STCM) is a novel approach to coded modulation, which enables symbol-by-symbol detection of trellis-coded data. A set of design rules, which guarantees nonzero coding gain, and codes with asymptotic coding gains of 3.0-5.4 dB are presented. STCM is well suited for operation in a dual-mode receiver. During normal operation the receiver uses a sequence estimation algorithm such as MLSE or SSE. When the channel introduces severe distortion, as is the case during a deep fade, the decoder switches to a systematic decoding algorithm, which is simple to implement, and guarantees BER performance that is better than uncoded modulation. The authors demonstrate the performance of various STCM codes with a dual-mode receiver on multipath fading channels
Keywords :
convolutional codes; decoding; error statistics; fading; intersymbol interference; maximum likelihood estimation; modulation coding; multipath channels; quadrature amplitude modulation; receivers; sequential estimation; signal detection; time-varying channels; trellis coded modulation; BER performance; asymptotic coding gains; channel introduces severe distortion; coded modulation; decoder; deep fade; dual-mode receiver; multipath fading channels; nonzero coding gain; sequence estimation algorithm; symbol-by-symbol detection; systematic decoding algorithm; systematic trellis-coded modulation; trellis-coded data; uncoded modulation; AWGN; Constellation diagram; Convolution; Convolutional codes; Data engineering; Fading; Maximum likelihood decoding; Maximum likelihood estimation; Modulation coding; Switches;
Conference_Titel :
Vehicular Technology Conference, 1994 IEEE 44th
Conference_Location :
Stockholm
Print_ISBN :
0-7803-1927-3
DOI :
10.1109/VETEC.1994.345236
