A joint iterative decoding Scheme in wireless image transmission system

Authors:
Xu Bai;Yang Cui;Zhong-zhao Zhang;Shao-chuan Wu
Affiliations:
Communication Research Center, Harbin Institute of Technology, Harbin, China;Communication Research Center, Harbin Institute of Technology, Harbin, China;Communication Research Center, Harbin Institute of Technology, Harbin, China;Communication Research Center, Harbin Institute of Technology, Harbin, China
Venue:
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Year:
2009

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Abstract

A joint source-channel decoding(JSCD) method are designed in real-time wireless image transmission system, JPEG2000 is used to perform source coding with certain error-resilience modes, and a regular low-density parity-check(LDPC) code is selected as the channel error correcting code. During decoding, the error detecting information from source decoder feedback to channel decoder which update the log-likelihood ratio(LLR) of partial codeword bits. Simulation results show that the JSCD scheme can accelerate the iterative procedure, and improve the PSNR of reconstructed images.