考虑雨衰 阴影 和多径影响，利用自然梯度算法，非归零型差分相位调制信号建模与仿真分析 ，能量熵的计算，借鉴了主成分分析算法（PCA），基于负熵最大的独立分量分析，包括最小二乘法、SVM、神经网络、1_k近邻法。- Consider shadow rain attenuation and multipath effects Use of natural gradient algorithm, NRZ type differential phase modulation signal modeling and simulation analysis, Energy entropy calculation, It draws on principal component analysis algorithm (PCA), Based on negative entropy largest independent component analysis, Including the least squares method, the SVM, neural networks, 1 _k neighbor method.