研究了一种改进的RM译码算法—改进的Sidel,nikov-Pershakov算法(简称SP算法),详细叙述了原始算法的原理以及改进算法的译码步骤,并对两种算法进行了仿真实现,对它们的译码性能和算法复杂度进行了比较。改进的译码算法复杂度略优于原始算法,而改进后的算法的译码性能明显优于原始算法。 This paper studies an improved RM decoding algorithm - the improved Sidel, nikov-Pershakov algorithm (referred to as SP algorithm), describes the principle of the original algorithm and the decoding steps of the improved algorithm in detail, and simulates the two algorithms. Their decoding performance and algorithm complexity are compared. The complexity of the improved decoding algorithm is slightly better than that of the original one, but the performance of the improved algorithm is obviously better than that of the original one.