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Design of 2-D linear phase IIR filters by using all-pass building blocks

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2 Author(s)
Safiri, H. ; Dept. of Electr. Eng., Windsor Univ., Ont., Canada ; Ahmadi, M.

Complementary filters are driven by using two 1-D all-pass functions. A structure of this kind employs a low sensitivity property. This structure is also computationally efficient. An extension of the 1-D structure to the 2-D structure is presented. It consists of the cascade sum of two 2-D all-pass building blocks with appropriate delay elements. Filters with the various cut-off boundaries can be designed by changing the parameters of the proposed structure. These parameters can be adapted from the table given. The coefficients of the all-pass blocks are obtained via an iterative nonlinear optimization technique. The objective function of the optimization program consists of the magnitude and the group delay error functions, resulting in a fairly linear phase filter in the passband with a specified magnitude shape

Published in:

Communications, Computers, and Signal Processing, 1995. Proceedings., IEEE Pacific Rim Conference on

Date of Conference:

17-19 May 1995