In this paper a Cascaded Integrated Comb (CIC) filter, an optimized class of linear filters such as FIR is implemented for Digital Down Conversion (DDC) for efficient transmission multi-rate system. CIC filters are often used for the purpose of reducing sampling rate (decimation) and increasing sampling rate (interpolation). This work is to show the efficiency of CIC filters over FIR filters in fixed point applications. Single stage CIC filter and multistage CIC filters are realized. Here CIC filter design models are developed using Simulink software. Also the multi-rate filters are further improved by cascading various CIC filter stages.
cascaded Integrated decimation comb, interpolation, decimation
