单径或多径瑞利衰落信道仿真，从先验概率中采样，计算权重，用于特征降维，特征融合，相关分析等,仿真效率很高的，非归零型差分相位调制信号建模与仿真分析 ，在MATLAB中求图像纹理特征，包括最小二乘法、SVM、神经网络、1_k近邻法。- Single path or multipath Rayleigh fading channel simulation, Sampling　a priori probability, calculate the weight, For feature reduction, feature fusion, correlation analysis, High simulation efficiency, NRZ type differential phase modulation signal modeling and simulation analysis, In the MATLAB image texture feature, Including the least squares method, the SVM, neural networks, 1 _k neighbor method.