码元级的RS码快速软译码

Fast Soft-Decision Decode of Reed-Solomon Code with Symbol-Level

通过比较几种码元可靠性值计算方法,提出了准确率较高的最小值法。基于RS码并行译码算法,将RS码移位并行译码算法作为软判决译码的代数译码方法,直接利用每个码元的可靠性值,确定试探位置,计算错误图样的软重量。模拟结果表明该算法与传统的Chase-2算法相比,译码速度得到了很大提高。

By comparing some methods of calculation for symbol reliability value, this paper comes up with the methods of minimum with more accuracy. Based on the algorithm of RS code parallel decode, the algorithm of RS code shift parallel decode can be used as algebra decode of soft decision decode. The reliability value of each symbol can be directly utilized, thus determining its exploratory position and calculating the soft weight of error pattern. The analog result indicates that compared with the traditional algorithm of chase 2, the speed of this decode has been increased a lot.