Design of cascaded integrator comb filter using IIR filter compensation method
Zhao Wang · Information technology newsletter · 2011
The high passband distortion and low stopband attenuation limit the application of cascaded integrator comb(CIC).In order to solve these problems,a new method,which is based on the characteristics of conventional CIC filter,is proposed.This new method employs high efficient secondorder ⅡR filter as a compensating filter cascading a conventional CIC.The experiments show that performances both in passband and stopband are improved when it is compared to interpolated secondorder polynomials CIC(ISOP-CIC) and sharpening CIC(SCIC),also it is of low complexity.Thus,this design is well suited for speed-limited systems with sample rate conversion while require high performance of passband and stopband.