APPLICATION OF SOFT-IN SOFT-OUT VITERBI ALGORITHM TO TURBO TRELLIS-CODED MODULATION/

Authors
MINOWA T OGIWARA H
Citation
T. Minowa et H. Ogiwara, APPLICATION OF SOFT-IN SOFT-OUT VITERBI ALGORITHM TO TURBO TRELLIS-CODED MODULATION/, IEICE transactions on fundamentals of electronics, communications and computer science, E81A(10), 1998, pp. 2047-2054
Citations number
12
Categorie Soggetti
Engineering, Eletrical & Electronic","Computer Science Hardware & Architecture","Computer Science Information Systems
Journal title
IEICE transactions on fundamentals of electronics, communications and computer science → ACNP
ISSN journal
09168508
Volume
E81A
Issue
10
Year of publication
1998
Pages
2047 - 2054
Database
ISI
SICI code
0916-8508(1998)E81A:10<2047:AOSSVA>2.0.ZU;2-J
Abstract
Soft-in/soft-out Viterbi algorithm (SOVA) originally proposed for rate 1/n code is applied to rate m/(m + 1) trellis-coded modulation (TCM). In TCM, 2(m) branches merge into a node in a code trellis. After prun ing the branches on path with less path-metric until two best paths re main, SOVA is applied to the pruned trellis. Based on the pruned trell is, an iterative decoding algorithm of turbo TCM is developed. Effects of path memory length and scaling of a value transferred between deco ding stages are investigated through simulation. Turbo TCM over 8 PSK and 16 QAM channel with Gaussian noise realize a bit error rate (BER) of 10(-5) within 1 dB from the Shannon limit.