The sensitivity of joint source-channel coding based on double protograph LDPC codes to source statistics

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20154601541784
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(1) Shenzhen Research Institute, Xiamen University, Shenzhen; 518057, China; (2) Department of Electrical and Computer Engineering, McMaster University, Hamilton; ON; L8S4K1, Canada; (3) Department of Communication Engineering, Xiamen University, Xiamen; 361005, China | 1600年 / CWC Nippon; Yokohama National University (YNU)卷 / IEEE Computer Society期
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Although the joint source and channel coding ([!text type='JS']JS[!/text]CC) systems constructed from double protograph low-density parity-check (DP LDPC) codes has been demonstrated to possess good performance; especially when they are applied into the transmission of radiography images; where the frameworks of both transmitter and receiver still need to be further optimised for the sake of achieving bit error rate (BER) performance under 10-6 over wireless transmission environment. This paper focuses on the perspective of transmitting terminal to investigate what factors will affect the performance of DP LDPC schemes so that the new transmitting models can be further designed. Specifically; this paper mainly concentrates on the sensitivity of DP LDPC scheme to source statistics. The simulation results show that the entropy of source information is a dominate factor for sources with low entropy while the correlated side information plays a vital role in sources with large entropy; which provides explicit directions for further [!text type='JS']JS[!/text]CC coding structures optimisation. © 2015 IEEE;
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