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| Title: | Utilization of 2-D Markov Source Correlation using Block Turbo Code |
| Authors: | Izhar, Mohd Azri Mohd
Fisal, Norsheila
Zhou, Xiaobo
Anwar, Khoirul
Matsumoto, Tad |
| Keywords: | Markov Source
Block Turbo Code
EXIT chart
Source Correlation |
| Issue Date: | 2012-08 |
| Publisher: | Institute of Electrical and Electronics Engineers (IEEE) |
| Magazine name: | 2012 7th International Symposium on Turbo Codes and Iterative Information Processing (ISTC) |
| Start page: | 56 |
| End page: | 60 |
| DOI: | 10.1109/ISTC.2012.6325198 |
| Abstract: | This paper proposes a joint source-channel coding technique using high rate block turbo codes where two-dimensional (2-D) source correlation of binary Markov source is well exploited. A modified Bahl-Cocke-Jelinek-Raviv (BCJR) algorithm is used in both horizontal and vertical decoders to exploit the 2-D source correlation. Based on extrinsic information transfer (EXIT) chart analysis and trajectory evaluation, we found out that the log-likelihood ratio (LLR) correlation for the block turbo codes increases as the source correlation becomes stronger and this prevents iterative decoding from convergence. A memory-1 accumulator with random interleaver is added to the design to minimise the LLR correlation and to achieve better performance when the source correlation is very strong. Further improvement can be achieved by replacing the memory-1 accumulator with a longer memory code to further reduce the statistical dependency of the LLR. It is shown that the proposed technique can achieve significant improvement over the standard system where the source correlation is not exploited. |
| Rights: | This is the author's version of the work. Copyright (C) 2012 IEEE. 2012 7th International Symposium on Turbo Codes and Iterative Information Processing (ISTC), 2012, 56-60. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. |
| URI: | http://hdl.handle.net/10119/10894 |
| Material Type: | author |
| Appears in Collections: | b11-1. 会議発表論文・発表資料 (Conference Papers)
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