可生成一个正弦信号，并加入白噪声，的到正弦信号和白噪声的混合信号，通过低通滤波器对白噪声进行处理,已通过测试。-Generates a sinusoidal signal, and adding white noise, the sinusoidal signal and white noise to the mixed-signal, white noise through a low pass filter processing, has been tested.