Title :
Extrinsic information in turbo decoding: a unified view
Author :
Colavolpe, Giulio ; Ferrari, Gianluigi ; Raheli, Riccardo
Author_Institution :
Dipt. di Ingegneria dell´´Inf., Parma Univ., Italy
Abstract :
In this paper, we address the use of the extrinsic information generated by each component decoder in an iterative decoding process. The algorithm proposed by Bahl et al. (1974) and the soft-output Viterbi algorithm (SOVA) are considered as component decoders. Numerical results for a classical rate-1/2 turbo code transmitted over a memoryless additive white Gaussian noise (AWGN) channel are provided. The performance analysis of the considered schemes leads to interesting remarks about the nature of iterative decoding processes
Keywords :
AWGN channels; Viterbi decoding; channel coding; iterative decoding; memoryless systems; turbo codes; AWGN channel; SOVA; classical rate-1/2 turbo code; extrinsic information; iterative decoding; memoryless additive white Gaussian noise channel; performance analysis; soft-output Viterbi algorithm; turbo decoding; AWGN; Additive white noise; Convolutional codes; Heart; Iterative algorithms; Iterative decoding; Performance analysis; Proposals; Turbo codes; Viterbi algorithm;
Conference_Titel :
Global Telecommunications Conference, 1999. GLOBECOM '99
Conference_Location :
Rio de Janeireo
Print_ISBN :
0-7803-5796-5
DOI :
10.1109/GLOCOM.1999.831690
