Title :
Symbol-based joint decoding of convolutionally encoded variable-length codes
Author :
Hung-Tsai Wu ; Chih-Hsien Lin ; Wen-Whei Chang
Author_Institution :
Inst. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
In this paper, we present a symbol-level joint source-channel decoding (JSCD) algorithm for transmission of convolutionally encoded variable-length codes (VLCs). The proposed algorithm is based on a two-dimensional state representation which leads to a three-dimensional code trellis. JSCD on this trellis is realized by employing a modified BCJR algorithm which allows to fully exploit the symbol-level source a priori information. Experimental results indicate that the proposed JSCD scheme achieves high robustness against channel noises.
Keywords :
channel coding; combined source-channel coding; convolutional codes; decoding; BCJR algorithm; JSCD algorithm; VLC; channel noises; convolutional encoded variable-length code; high robustness; symbol-level joint source-channel decoding algorithm; symbol-level source a priori information; two-dimensional state representation; AWGN channels; Convolutional codes; Decoding; Iterative decoding; Joints; Redundancy; Signal to noise ratio; joint source-channel decoding; three-dimensional code trellis; variable-length codes;
Conference_Titel :
ITS Telecommunications (ITST), 2012 12th International Conference on
Conference_Location :
Taipei
Print_ISBN :
978-1-4673-3071-8
Electronic_ISBN :
978-1-4673-3069-5
DOI :
10.1109/ITST.2012.6425154
