A Fast Viterbi Decoding in Optical Channels
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概要
- 論文の詳細を見る
copyright(c)1992 IEICE許諾番号:08RB0011A fast Viterbi decoding technique with path reduction in optical channels is presented. This decoding exploits the asymmetric characteristic of optical channels. In the decoding trellis, the branches with low or no possibility being correct path are eliminated based on the detected signal level. The number of Add-Compare-Select (ACS) operations which occupy the dominant part of Viterbi decoding is considerably reduced due to branch eliminations, and fast decoding is realized by decoding asynchronously to received sequence. The reduction of the number of ACS operations is derived for the codes with rate 1/2. It is shown that the number of ACS operations is considerably reduced compared with the conventional Viterbi decoding. The bit error probability of the proposed decoding is derived for noiseless photon counting channel. It is also shown that the decoding technique can be applied to the cases using avalanche photo diode (APD) based receiver with dark current noise at a cost of negligible degradation on the bit error probability.
- 社団法人電子情報通信学会の論文
- 1992-01-25
著者
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Sasase Iwao
The Faculty Of Science And Technology Keio University
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Sasase Iwao
The Faculy Of Science And Technology Keio Univresity
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Mori Shinsaku
The Faculty Of Science And Technology Keio University
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Mori Shinsaku
The Faculy Of Science And Technology Keio Univresity
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Mori Shinsaku
Faculty Of Electrical Engineering Keio University
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Suzuki Jouji
The Faculy Of Engineering Saitama University
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YASHIMA Hiroyuki
the Faculy of Engineering, Saitama University
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Yashima Hiroyuki
The Faculy Of Engineering Saitama University
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八嶋 弘幸
Faculty of Engineering, Saitama University
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SUZUKI Jouji
Faculty of Engineering, Saitama University
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SASASE Wao
Faculty of Science and Technology, Keio University
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