基于分段非线性权重值的Pso算法，包含特征值与特征向量的提取、训练样本以及最后的识别，考虑雨衰 阴影 和多径影响。- Based on piecewise nonlinear weight value Pso algorithm, Contains the eigenvalue and eigenvector extraction, the training sample, and the final recognition, Consider shadow rain attenuation a