Design of 2-D Linear Phase Digital Filters Using Schur Decomposition and Symmetries |
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Authors: | Aldhaheri Rabah W |
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Affiliation: | 1. Department of Electrical and Computer Engineering, King Abdulaziz University, P.O. Box 80204, Jeddah, 21589, Saudi Arabia
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Abstract: | In this paper we present a new and numerically efficient technique for designing 2-D linear phase octagonally symmetric digital filters using Schur decomposition method (SDM) and the diagonal symmetry of the 2-D impulse response specifications. This technique is based on two steps. First, the 2-D impulse response matrix is decomposed into a parallel realization of k sections, each comprising two cascaded linear phase SISO 1-D FIR digital filters. It is shown that using the symmetry property of the 2-D impulse response matrix and the fact that the left and right eigenspaces obtained by SDM are transpose of each other, the design problem of two 1-D digital filters is reduced to the design problem of only one 1-D digital filter in each section. |
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