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arXiv 0906.3778cs.ITmath.IT
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Reed-Solomon码译码的改进欧几里德算法

Modified Euclidean Algorithms for Decoding Reed-Solomon Codes

Dilip V. Sarwate, Zhiyuan Yan

摘要:

多项式最大公约数的扩展欧几里德算法(EEA)是RS码译码中求解关键方程的常用算法,更广泛地应用于BCH码译码中。对于该特定应用,当余数多项式的次数低于阈值时,停止EEA中的迭代。虽然确定多项式的次数对人类来说是一项简单的任务,但这种停止规则的硬件实现更为复杂。本文介绍了一种修改后的版本的EEA,是专门适用于RS解码问题。这种改进的算法不需要度计算或与阈值的比较,并且它使用固定的迭代次数。这个修改版本的另一个优点是在其应用程序的RS码的错误和擦除解码问题,通过无缝计算可以实现显着的硬件节省。

英文摘要:

The extended Euclidean algorithm (EEA) for polynomial greatest common divisors is commonly used in solving the key equation in the decoding of Reed-Solomon (RS) codes, and more generally in BCH decoding. For this particular application, the iterations in the EEA are stopped when the degree of the remainder polynomial falls below a threshold. While determining the degree of a polynomial is a simple task for human beings, hardware implementation of this stopping rule is more complicated. This paper describes a modified version of the EEA that is specifically adapted to the RS decoding problem. This modified algorithm requires no degree computation or comparison to a threshold, and it uses a fixed number of iterations. Another advantage of this modified version is in its application to the errors-and-erasures decoding problem for RS codes where significant hardware savings can be achieved via seamless computation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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