Optimum multiplierless compensators for sharpened cascaded‐integrator‐comb decimation filters

Abstract

Folding band sharpening of the cascaded-integrator-comb filter results in a high passband droop. In applications requiring low passband deviation, the droop is reduced by connecting a low-order FIR compensator in cascade with the filter. In this Letter, the authors present a method for optimum design of compensators whose coefficients are expressed as sums of signed-power-of-two terms. The method is based on the minimisation of passband deviation, with specified total number of terms.

A Novel Approach for Optimal Design of Sample Rate Conversion Filter Using Linear Optimization Technique

“…Total number of additional adders for compensator is N A = 7. Overall APOS of Compensated minimax SCIC is given as In Ref [17], compensators are designed for sharpened CIC.…”

“…Complexity Analysis: The sharpening polynomial for compensated minimax SCIC in Ref [17] is = x 4 − 2 −6 x 2 . Thus, degree of sharpening polynomial is 4.…”

Design of Two-Stage Comb-Based Decimation Filter with High Aliasing Rejection and Low Passband Droop

“…where N a is given in (10). As a difference to [13], the values A and B are obtained here using the Particle Swarm Optimization (PSO) of MATLAB.…”

Coefficient quantization effects on new filters based on Chebyshev fourth-kind polynomials

“…Most of the time, the final goal of using a filter is to achieve a kind of frequency selectivity on the spectrum of the input signal. Till now, researchers have suggested different methods for improving the digital filter efficiency as presented in [1]- [8]. Different methods presented in [4]- [8] share the same idea, namely, using CIC (Cascade-Integrator-Comb) sections with some added solutions to improve filter attenuation.…”

“…Till now, researchers have suggested different methods for improving the digital filter efficiency as presented in [1]- [8]. Different methods presented in [4]- [8] share the same idea, namely, using CIC (Cascade-Integrator-Comb) sections with some added solutions to improve filter attenuation. Different methods are proposed to compensate for the passband droop as it is described in [9]- [17].…”