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简要介绍了构成乘积码的分量码的Chase2译码算法,并对算法中关于测试图样的产生方法进行了改进,提出了一种可以快速进行伴随式计算的测试图样构造方法,根据计算所得伴随式给出了一种带偶校验的测试序列的硬判决译码方法。把改进后的Chase2译码算法应用到乘积码的迭代译码中,并进行了仿真研究,对不同迭代次数的译码结果进行了分析比较,当迭代次数增加时,译码性能逐渐改善。
This paper briefly introduces the Chase2 decoding algorithm of the component codes that make up the product code, and improves the method of generating the test pattern in the algorithm. A method of constructing the test pattern is proposed, which can be used to calculate the concomitant formula quickly. Based on the calculated formula A hard decision decoding method with even parity test sequence is given. The improved Chase2 decoding algorithm is applied to the iterative decoding of product codes, and the simulation research is carried out. The decoding results of different iteration times are analyzed and compared. When the number of iterations increases, the decoding performance gradually improves.