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| A Modified max-log-MAP Decoding Algorithm for Turbo Decoding | |
| 引用本文： | ZOU Xue lan,FENG Guang zeng (Mobile Communication Lab,Nanjing University of Posts and Telecommunications,Nanjing 210003,P. R. China). A Modified max-log-MAP Decoding Algorithm for Turbo Decoding[J]. 中国邮电高校学报(英文版), 2002, 9(1) |
| 作者姓名： | ZOU Xue lan FENG Guang zeng (Mobile Communication Lab Nanjing University of Posts and Telecommunications Nanjing 210003 P. R. China) |
| 作者单位： | Mobile Communication Lab，Nanjing University of Posts and Telecommunications，Nanjing 210003，P. R. China |
| 摘 要： | 1 ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅａｄｖｅｎｔｏｆＴｕｒｂｏｃｏｄｅ ｐｒｅｓｅｎｔｅｄｂｙＢＥＲＲＯＵＣｅｔａｌ.ｉｎ 1 993ｉｓｔｈｅｍｉｌｅｓｔｏｎｅｉｎｔｈｅｈｉｓｔｏｒｙｏｆｉｎｆｏｒｍａｔｉｏｎｔｈｅｏｒｙ[1 ] .Ｔｕｒｂｏｃｏｄｅ,ｗｈｉｃｈｉｓａｎｅｗｃｌａｓｓｏｆｃｏｎｃａｔｅｎａｔｅｄｃｏｄｅｓ,ｈａｓｂｅｅｎｓｔｕｄ ｉｅｄｂｙｍａｎｙａｃａｄｅｍｉｃｉａｎｓａｌｌｏｖｅｒｔｈｅｗｏｒｌｄｂｅｃａｕｓｅｏｆｉｔｓ ｐｏｗｅｒｆｕｌｅｒｒｏｒｃｏｒｒｅｃｔｉｏｎｃａｐａｂｉｌｉｔｙ[1 0… |
A Modified max-log-MAP Decoding Algorithm for Turbo Decoding |
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| ZOU Xuelan,Feng Guangzeng. A Modified max-log-MAP Decoding Algorithm for Turbo Decoding[J]. The Journal of China Universities of Posts and Telecommunications, 2002, 9(1) | |
| Authors: | ZOU Xuelan Feng Guangzeng |
| Abstract: | Turbo decoding is iterative decoding, and the MAP algorithm is optimal in terms of performance in Turbo decoding. The log MAP algorithm is the MAP executed in the logarithmic domain, so it is also optimal. Both the MAP and the log MAP algorithm are complicated for implementation. The max log MAP algorithm is derived from the log MAP with approximation, which is simply compared with the log MAP algorithm but is suboptimal in terms of performance. A modified max log MAP algorithm is presented in this paper, based on the Taylor series of logarithm and exponent. Analysis and simulation results show that the modified max log MAP algorithm outperforms the max log MAP algorithm with almost the same complexity. |
| Keywords: | turbo code the log MAP algorithm taylor series |
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