用Matlab产生正弦波、均匀白噪声、高斯白噪声，并将两种噪声叠加到正弦波上。并给出自相关和功率谱密度波形-Generate sine wave using Matlab, uniform white noise, Gaussian white noise, and two kinds of noise superimposed on the sine wave. And from related to the waveform and power spectral density

中值滤波对于高密度噪声基本失去效果，改进自适应中值滤波能够消除高密度噪声-Median filtering for noise basic loss effect of high density, improved median filter to eliminate high-density noise