实现仿真信号的胡相关处理降噪，可以实现被白噪声污染的信号中有用信号的提取，并进行了fft变换，可以清晰的看清信号的频谱-Hu correlation processing to achieve the simulated signal noise, white noise contaminated signal in the extraction of the useful signal can be achieved, and fft transform, you can clearly se