turbo译码中Log-MAP算法的简化

The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings. Pub Date : 2004-12-06 DOI:10.1109/APCCAS.2004.1413065

Lou Xi-zhong, Mao Zhi-gang, Ye Yi-zheng, Chen Yan-Min

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引用次数: 3

摘要

为了简化turbo译码的VLSI实现，提出了Log-MAP算法及其改进方案。这项工作提出了一种新的方法来简化log - map算法，称为shift - log - map，因为它取代了log和exp的移位操作。利用斜率为1/2、1/4等的泰勒方程，将Log-MAP算法中的校正项转化为线性函数。它允许高效的ASIC实现，并且几乎具有与Log-MAP算法相同的性能。

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A simplification of the Log-MAP algorithm for turbo decoding

The Log-MAP algorithm and its modifications were proposed to simplify the VLSI implementation of turbo decoding. This work presents a new way to simplify the Log-MAP algorithm, called Shift-Log-MAP as it takes place of log and exp operation with shift. The correction term in the Log-MAP algorithm was transformed to linear function by use of Taylor equation at the slope of 1/2, 1/4, etc. It allows for efficient ASIC implementation and almost has the same performance as the Log-MAP algorithm.

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来源期刊

The 2004 IEEE Asia-Pacific Conference on Circuits and Systems, 2004. Proceedings.

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