Application of Soft-In/Soft-Out Viterbi Algorithm to Turbo Trellis-Coded Modulation (Special Section on Information Theory and Its Applications)
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概要
- 論文の詳細を見る
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 pruning the branches on path with less path-metric until two best paths remain, SOVA is applied to the pruned trellis. Based on the pruned trellis, an iterative decoding algorithm of turbo TCM is developed. Effects of path memory length and scaling of a value transferred between decoding 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 1dB from the Shannon limit.
- 社団法人電子情報通信学会の論文
- 1998-10-25
著者
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Ogiwara Haruo
Department Of Electrical Engineering Nagaoka University Of Technology
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Minowa T
National Inst. Of Information And Communications Technol. Kashima‐shi Jpn
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Minowa Tadashi
Department Of Electrical Engineering Nagaoka University Of Technology
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- Application of Soft-In/Soft-Out Viterbi Algorithm to Turbo Trellis-Coded Modulation (Special Section on Information Theory and Its Applications)
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