用周期循环检测算法检测：

首先运行a.m程序，通过此程序运算得出循环频率a值；

再运行zhouqi.m程序，对a值进行确定，通过周期循环算法对信号进行检测；

-With cycle detection algorithm to detect: First run am program, through this program computing a value obtained cyclic frequency　zhouqi.m then run the program, for a value determined by the cycle algorithm of signal detection