Noise Detection in IIR Digital Filter Using Matlab

Filters play a trifling role in every electronic system. The basic serviceable need for filtering is to pass an assortment of frequencies while rejecting others. This need for filtering has a lot of technical uses in the digital signal processing (DSP) areas of data communications, imaging, digital video, and voice communications. The idea of this paper is to design Butter worth IIR filter for the signal analysis using MATLAB. By this approach we will denoise the digital signal. We also consider different parameters of Butter worth low pass filter such as Cut off frequency and order of the filter and see the variation of these parameter on noise.