Design and Multiplierless Realization of Maximally Flat Sharpened-CIC Compensators (CROSBI ID 246394)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Molnar, Goran ; Dudarin, Aljoša ; Vučić, Mladen
engleski
Design and Multiplierless Realization of Maximally Flat Sharpened-CIC Compensators
Polynomial sharpening is an efficient technique for improving folding band response of cascaded-integrator-comb (CIC) decimation filters. However, the sharpening of folding bands results in a high passband droop, which is intolerable in many applications. The droop can be reduced by connecting a symmetric finite-impulse-response filter called compensator in the cascade with the sharpened CIC (SCIC) filter. This brief presents a method for the design of such compensators, which is based on maximally flat error criterion. The compensator’s coefficients are obtained by solving linear system of equations which is formed using a straightforward procedure. The coefficients obtained generally take real values. However, we show that for the SCIC filters incorporating integer or SPT polynomial coefficients, and whose decimation factors are expressed as powers of two, the coefficients of corresponding maximally flat compensators are integers or SPT representable. For this type of SCIC filters, the optimum multiplierless structures of the compensators with three and five coefficients are described.
cascaded-integrator-comb (CIC) filters, comb filters, compensation, maximally flat, multiplierless, sharpening, sum of powers of two (SPT)
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Podaci o izdanju
65 (1)
2018.
51-55
objavljeno
1549-7747
1558-3791
10.1109/tcsii.2017.2700081
Povezanost rada
Elektrotehnika, Računarstvo