中文说明： 利用最小二乘算法实现对三维平面的拟合，匹配追踪和正交匹配追踪，基于互功率谱的时延估计，IDW距离反比加权方法，包括调制，解调，信噪比计算，完整的基于HMM的语音识别系统。
English Description：
Using least square algorithm realize the 3D plane fitting, matching pursuit and orthogonal matching pursuit, based on the cross power spectrum time delay estimation, IDW inverse distance weighted method, including the modulation and demodulation, signal to noise ratio calculation, complete based on HMM based speech recognition system.