Title :
Source-controlled channel decoding
Author :
Hagenauer, Joachim
Author_Institution :
Tech. Univ. Munchen, Germany
fDate :
27 Jun-1 Jul 1994
Abstract :
The performance of a channel decoder can be considerably improved if a priori information about the source bits is used. Many source coding schemes for analog signals still have correlation between bits of successive frames. We show that soft-outputs and bit correlations can be converted into a priori values for the next frame and used by a modified Viterbi algorithm, the APRI-SOVA. Gains of several decibels with respect to classical Viterbi decoding are obtained for the mobile GSM coding scheme and PCM transmission schemes
Keywords :
Viterbi decoding; cellular radio; channel coding; correlation methods; pulse code modulation; source coding; APRI-SOVA; PCM transmission; a priori information; analog signals; bit correlations; channel coding; channel decoder; mobile GSM coding; modified Viterbi algorithm; performance; soft-outputs; source bits; source coding; source-controlled channel decoding; Channel coding; Channel state information; Decoding; Delay; Fading; GSM; Image reconstruction; Phase change materials; Source coding; Viterbi algorithm;
Conference_Titel :
Information Theory, 1994. Proceedings., 1994 IEEE International Symposium on
Conference_Location :
Trondheim
Print_ISBN :
0-7803-2015-8
DOI :
10.1109/ISIT.1994.394807
