Design and realisation of Multirate signal processor for enhancement performance of Digital recievers

Multirate Digital Systems employ multiple sampling rates in their processing. Multirate Digital System find applications in speech processing, image compression, antenna systems, software radios and communication. Multirate filters are used in numerous applications of Multirate Digital System. This paper presents the design of Multirate Cascaded Integrated-Comb filter for better performance in Digital receivers. Cascaded Comb Filter is a multiplier less realization digital filter. Our work also presents the comparison of butter worth and Cascaded Integrated Comb Filter for better performance of Digital receivers in terms of reduced BER (Bit error rate). The comparative study has also been presented in this paper. The performance has been carried out on QPSK modulated signal.