基于快速傅里叶变换的GUI设计，能对多个输入序列进行FFT分析，并在画面上显示出输入信号，经过FFT处理，经过IFFT处理的信号波形-GUI design based on the fast Fourier transform, FFT analysis of a plurality of input sequences, and displayed on the screen of the input signal after FFT processing, the signal waveform after the IFFT processing