这是一个含有GUI界面的数字频谱分析仪。该.m文件实现了FFT和滤波器两种方法对正弦信号，线性调频信号的产生及处理。-The. M file implements two methods FFT and filters sinusoidal signal generation and processing chirp signal. And generates a GUI interface, interaction can be completed, and the process parameters to change the parameter signal.