Title :
Viterbi decoder design and performance evaluation for mobile satellite fading channels
Author :
Huang, C.Y. ; Chalmers, H.
Author_Institution :
COMSAT Corp., Clarksburg, MD, USA
Abstract :
The performance of a modified Viterbi decoding scheme which applies channel state information is examined for a rate-1/2, K=7 convolutional code in the Rician fading channel with direct-to-multiple-signal power C/M=7 dB. About 1-dB improvement is obtained at a 10-6 bit error rate compared to a conventional Viterbi decoding scheme. A hardware structure that is realizable by a conventional Viterbi decoder chip is proposed for the modified scheme. It is shown that a traceback length 11 times the code constraint length for such a fading channel provides the optimal result of an additional 0.3-dB gain compared to the optimal additive white Gaussian noise (AWGN) traceback length of five constraint lengths
Keywords :
convolutional codes; decoding; fading; mobile radio systems; satellite relay systems; telecommunication channels; Rician fading channel; Viterbi decoder chip; Viterbi decoder design; Viterbi decoding; bit error rate; channel state information; code constraint length; convolutional code; direct-to-multiple-signal power; mobile satellite fading channels; performance evaluation; traceback length; AWGN; Bit error rate; Channel state information; Convolutional codes; Decoding; Fading; Hardware; Rician channels; Time factors; Viterbi algorithm;
Conference_Titel :
Global Telecommunications Conference, 1992. Conference Record., GLOBECOM '92. Communication for Global Users., IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-0608-2
DOI :
10.1109/GLOCOM.1992.276534
