Performance Evaluation of Cascaded Integrator-Comb (CIC) Filter
Suverna Sengar · IOSR Journal of Engineering · 2012
Multirate filters find application in communication, speech processing, image compression, antenna systems, analog voice privacy systems and in the digital audio industry.The cascaded integrator-comb filter is a digital filter which employed multiplier-less realization.This type of filter has extensive applications in low-cost implementation of interpolators and decimators.The basic principles of the CIC decimation filter are presented in this paper.It combines the cascaded integrator-comb (CIC) multirate filter structure with compensation techniques to improve the filter's passband response.This allows the first-stage CIC decimation filter to be followed by the FIR decimation filter.Simulation results show the gain responses of the CIC filters.