Optimal Sharpening of CIC Filters and An Efficient Implementation Through Saramäki-Ritoniemi Decimation Filter Structure (Extended Version)
نویسنده
چکیده
Conventional sharpened cascaded-integrator-comb (CIC) filters use generic sharpening polynomials to improve the frequency response. In contrast to the existing literature, an optimization framework is described for the selection of CIC sharpening polynomial and an efficient implementation through Saramäki-Ritoniemi decimation structure is suggested for its realization. The optimized sharpening polynomials are application specific and designed to meet given passband ripple and stopband attenuation specifications. Numerical results show that the optimized structure can be used without a secondary droop compensation filter, which is typically required for the conventional systems.
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