Utilization of 2-D Markov source correlation using block turbo codes
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...
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| Format: | Article |
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IEEE
2012
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| author | Mohd. Izhar, Mohd. Azri Fisal, Norsheila Zhou, Xiaobo Anwar, Khoirul Matsumoto, Tad |
| author_facet | Mohd. Izhar, Mohd. Azri Fisal, Norsheila Zhou, Xiaobo Anwar, Khoirul Matsumoto, Tad |
| author_sort | Mohd. Izhar, Mohd. Azri |
| collection | ePrints |
| description | 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 |
| first_indexed | 2024-03-05T19:23:20Z |
| format | Article |
| id | utm.eprints-47703 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T19:23:20Z |
| publishDate | 2012 |
| publisher | IEEE |
| record_format | dspace |
| spelling | utm.eprints-477032018-10-21T04:33:15Z http://eprints.utm.my/47703/ Utilization of 2-D Markov source correlation using block turbo codes Mohd. Izhar, Mohd. Azri Fisal, Norsheila Zhou, Xiaobo Anwar, Khoirul Matsumoto, Tad TK Electrical engineering. Electronics Nuclear engineering 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 IEEE 2012 Article PeerReviewed Mohd. Izhar, Mohd. Azri and Fisal, Norsheila and Zhou, Xiaobo and Anwar, Khoirul and Matsumoto, Tad (2012) Utilization of 2-D Markov source correlation using block turbo codes. International Symposium on Turbo Codes and Iterative Information Processing, ISTC . pp. 56-60. ISSN 2165-4700 http://dx.doi.org/10.1109/ISTC.2012.6325198 DOI: 10.1109/ISTC.2012.6325198 |
| spellingShingle | TK Electrical engineering. Electronics Nuclear engineering Mohd. Izhar, Mohd. Azri Fisal, Norsheila Zhou, Xiaobo Anwar, Khoirul Matsumoto, Tad Utilization of 2-D Markov source correlation using block turbo codes |
| title | Utilization of 2-D Markov source correlation using block turbo codes |
| title_full | Utilization of 2-D Markov source correlation using block turbo codes |
| title_fullStr | Utilization of 2-D Markov source correlation using block turbo codes |
| title_full_unstemmed | Utilization of 2-D Markov source correlation using block turbo codes |
| title_short | Utilization of 2-D Markov source correlation using block turbo codes |
| title_sort | utilization of 2 d markov source correlation using block turbo codes |
| topic | TK Electrical engineering. Electronics Nuclear engineering |
| work_keys_str_mv | AT mohdizharmohdazri utilizationof2dmarkovsourcecorrelationusingblockturbocodes AT fisalnorsheila utilizationof2dmarkovsourcecorrelationusingblockturbocodes AT zhouxiaobo utilizationof2dmarkovsourcecorrelationusingblockturbocodes AT anwarkhoirul utilizationof2dmarkovsourcecorrelationusingblockturbocodes AT matsumototad utilizationof2dmarkovsourcecorrelationusingblockturbocodes |