A non-iterative phase noise compensation method based on the sum-product algorithm (SPA) is applied to the outputs of intersymbol interference (ISI) channels. The outputs are modeled as independent Gaussian random variables, and the receiver applies mismatched processing with von Mises statistics. The performance is compared with that of linear minimum-mean-square-error filtering. The SPA achieves higher information rates at similar complexity for three channel types: ISI-free, standard single-mode fiber, and multipath channels with orthogonal frequency-division multiplexing.

翻译：基于和积算法（SPA）的非迭代相位噪声补偿方法被应用于码间干扰（ISI）信道的输出。将输出建模为独立高斯随机变量，接收机采用基于冯·米塞斯统计的失配处理。性能与线性最小均方误差滤波进行对比。对于三种信道类型——无ISI信道、标准单模光纤信道以及采用正交频分复用的多径信道——SPA在相近复杂度下实现了更高的信息速率。