DTMF的数据fft分析，每个键值的波形和频谱都有显示，有GUI界面-DTMF data fft analysis, waveform and spectrum of each key has revealed that there is a GUI interface

DTMF报告和代码，基于simulink仿真，通过GUI调用m代码和simulink，可加噪音。-DTMF reports and code, based on simulink simulation, call m code and simulink through GUI, can add noise.