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Maximally flat low-pass FIR filters with reduced delay

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2 Author(s)
Selesnick, I.W. ; Dept. of Electr. & Comput. Eng., Rice Univ., Houston, TX, USA ; Burrus, C.S.

This paper describes a new class of nonsymmetric maximally flat low-pass finite impulse response (FIR) filters. By subjecting the magnitude and group delay responses (individually) to differing numbers of flatness constraints, the new filters are obtained. It is found that these filters achieve a smaller delay than symmetric filters while maintaining relatively constant group delay around ω=0, with no degradation of the frequency response magnitude. The design of these filters is initially investigated using Grubner bases. An analytic design technique, applicable to a subset of the forgoing filters, is provided that does not depend on Grubner basis computations

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Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on  (Volume:45 ,  Issue: 1 )