Method and apparatus for reducing the noise contribution for signals sampled digitally

摘要

Method and apparatus for reducing the noise contribution for signals sampled digitally a method and a device for reducing the noise contribution for signals sampled digitally includeA statistical processor and a slope limiter.The processor determines a statistical average value (average and / or standard deviation) of the filtered signal.Which is used for determining a limit angle corresponding to a maximum value of the first frequency signal derived from a target.This limit of slope is applied to restrict the output of an analog to digital converter to prevent the output from the analog to digital converter exceeds the maximum rate of.Levau00e7u00e3o or fall.By the restriction of output from the analog to digital converter, it is possible to digitally sample the analog signals without first using a filter anti aliasing.Since the post processing of the signals sampled digitally limits the contribution of higher frequency components of the signal to enable, in this way,A fully digital sampling and that the circle of filtration is provided for receiving signals.