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Frequency-domain design of 2-D digital filters using the iterative singular value decomposition

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2 Author(s)
Tian-Bo Deng ; Dept. of Inf. & Comput. Sci., Toyo-hashi Univ. of Technol., Japan ; Kawamata, M.

The authors propose a technique for designing 2-D digital filters (2DDFs) with specified magnitude and constant group delay characteristics. The method is based on the iterative singular value decomposition (ISVD) of a 2-D magnitude specification matrix. The ISVD guarantees all its decomposition results to be always nonnegative. By using the ISVD, 2-D magnitude specifications can be decomposed into a pair of 1-D ones, and thus the problem of designing a 2DDF can be reduced to the one of designing a pair of 1DDFs or even only one 1DDF. A design example shows that this technique can be used to design 2DDFs with a higher degree of precision but needs less computational effort

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Circuits and Systems, IEEE Transactions on  (Volume:38 ,  Issue: 10 )