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Reducing CIC filter complexity

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2 Author(s)
Losada, R.A. ; MathWorks Inc., Natick, MA, USA ; Lyons, R.

This paper provides several tricks to reduce the complexity and enhance the usefulness of cascaded integrator-comb (CIC) filters. The first trick shows a way to reduce the number of adders and delay elements in a multi-stage CIC interpolation filter. The result is a multiplierless scheme that performs high-order linear interpolation using CIC filters. The second trick shows a way to eliminate the integrators from CIC decimation filters. The benefit is the elimination of unpleasant data word growth problems.

Published in:

Signal Processing Magazine, IEEE  (Volume:23 ,  Issue: 4 )

Date of Publication:

July 2006

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