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-Feb-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
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