Design of highly selective two-dimensional recursive fan filters byrelaxing symmetry constraints |
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Authors: | Lin Z. Bruton L.T. Bartley N.R. |
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Affiliation: | Dept. of Electr. Eng., Calgary Univ., Alta.; |
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Abstract: | Shows for the design of quadrantally symmetric 2-D fan filters that it is unnecessarily restrictive to prescribe exact quadrantal symmetry, which requires that the denominator of the Z-transform transfer function be product-separable. Superior approximately symmetric fan filter designs can be achieved using nonseparable denominators |
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