对信号进行过采样,可以调节P的数值改变过采样的倍数，一般取P=4就可以实现基本不失真。-over-sampling

该matlab程序验证了信号处理中delta-sigma ADC的效果，在过采样和delta-sigma单次循环后得到的图象性噪比提高。-The matlab program verification of signal processing in the effect of delta-sigma ADC, and the over-sampling delta-sigma a single image obtained after cycles of noise ratio increase