考虑雨衰 阴影 和多径影响，完整的基于HMM的语音识别系统，包括最小二乘法、SVM、神经网络、1_k近邻法。- Consider shadow rain attenuation and multipath effects Complete HMM-based speech recognition system, Including the least squares method, the SVM, neural networks, 1 _k neighbor method.