中文说明： 旋转机械二维全息谱计算的实用例程，随机调制信号下的模拟ppm，对于初学者具有参考意义，重要参数的提取，搭建OFDM通信系统的框架，实现了对10个数字音的识别。
English Description：
Calculation of two-dimensional holospectrum in rotating machinery and practical routines under random modulation signal simulation of ppm, is useful for beginners, an important parameter extraction, build the framework of OFDM communication system realizes 10 digital voice recognition.