Circularly symmetric filters using McClellan transformation

Gopal Palacharla

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ABSTRACT

Two-dimensional filters with circular symmetry are realized by exploiting their circular symmetry. They can be realized in an efficient manner from the corresponding 1-D filter, without the 2-D coefficients being computed. Only the 1-D filter coefficients need to be stored to realize the two-dimensional filter. Transformation technique using Chebyshev polynomials (called the McClellan transformation) is used in the design. The realization of the 2-D filter using transformation is efficient compared to two-dimensional convolution.