本文在阐明反相对称调制（PISM）原理的基础上，结合曼彻斯特码的结构特点，给出了一种基于PISM原理的曼彻斯特码解码系统，并对其抗噪声性能进行了理论分析，揭示了曼彻斯特码潜在的抗噪声性能。-This article clarifies RP-symmetry modulation (PISM) on the basis of principle, Manchester code with the structural characteristics of a given based on the principle of PISM Manchester Decoder System and the anti-noise performance of the theoretical analysis reveals the Manchester code potential anti-noise performance.