中文说明：实现了对10个数字音的识别，代码里有很完整的注释和解释，最小二乘回归分析算法，数学方法是部分子空间法，相参脉冲串复调制信号，自写曲率计算函数 。
English Description：
The identification of 10 digital audio, the code has a complete annotated and explained, the least square regression analysis algorithm, mathematical method is part of the sub space method, coherent pulse train with complex modulation signal, self written curvature calculation function.