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Design of two-dimensional IIR digital filters with linear phase

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2 Author(s)
B. A. Shenoi ; Dept. of Electr. Eng., Wright State Univ., Dayton, OH, USA ; P. Misra

Digital Spectral Transformation (DST) has been used to approximate the magnitude response specifications of circular, elliptic and fan shaped filters. In this paper, it is shown that when the DST proposed by Harn and Shenoi (1986) is applied to the 1D lowpass prototype filters with linear phase characteristics to realize 2D IIR filters, it preserves both magnitude and phase characteristics in the ω1 2 plane. Several attractive features of using this approach are discussed and simulation results are provided to illustrate its performance

Published in:

IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing  (Volume:42 ,  Issue: 2 )