標題: | Iterative Symbol Decoding of Variable-Length Codes with Convolutional Codes |
作者: | Wu, Hung-Tsai Wu, Chun-Feng Chang, Wen-Whei 傳播研究所 Institute of Communication Studies |
關鍵字: | Extrinsic information;iterative source-channel decoding (ISCD);three-dimensional joint trellis;variable-length code (VLC) |
公開日期: | 29-二月-2016 |
摘要: | In this paper, we present a symbol-level iterative sourcechannel decoding (ISCD) algorithm for reliable transmission of variable-length codes (VLCs). Firstly, an improved source a posteriori probability (APP) decoding approach is proposed for packetized variable-length encoded Markov sources. Also proposed is a recursive implementation based on a three-dimensional joint trellis for symbol decoding of binary convolutional codes. APP channel decoding on this joint trellis is realized by modification of the Bahl-Cocke-Jelinek-Raviv algorithm and adaptation to the non-stationary VLC trellis. Simulation results indicate that the proposed ISCD scheme allows to exchange between its constituent decoders the symbol-level extrinsic information and achieves high robustness against channel noises. |
URI: | http://dx.doi.org/10.1109/JCN.2016.000007 http://hdl.handle.net/11536/134279 |
ISSN: | 1229-2370 |
DOI: | 10.1109/JCN.2016.000007 |
期刊: | JOURNAL OF COMMUNICATIONS AND NETWORKS |
Volume: | 18 |
Issue: | 1 |
起始頁: | 40 |
結束頁: | 49 |
顯示於類別: | 期刊論文 |