Ju-Hong Lee and Chong-Jia Ciou and Yuan-Hau Yang
TwoDimensional Symmetric HalfPlane Recursive Doubly Complementary Digital Lattice Filters
628 - 634
2016
10
5
International Journal of Electrical and Computer Engineering
https://publications.waset.org/pdf/10004594
https://publications.waset.org/vol/113
World Academy of Science, Engineering and Technology
This paper deals with the problem of twodimensional (2D) recursive doubly complementary (DC) digital filter design. We present a structure of 2D recursive DC filters by using 2D symmetric halfplane (SHP) recursive digital allpass lattice filters (DALFs). The novelty of using 2D SHP recursive DALFs to construct a 2D recursive DC digital lattice filter is that the resulting 2D SHP recursive DC digital lattice filter provides better performance than the existing 2D SHP recursive DC digital filter. Moreover, the proposed structure possesses a favorable 2D DC halfband (DCHB) property that allows about half of the 2D SHP recursive DALF’s coefficients to be zero. This leads to considerable savings in computational burden for implementation. To ensure the stability of a designed 2D SHP recursive DC digital lattice filter, some necessary constraints on the phase of the 2D SHP recursive DALF during the design process are presented. Design of a 2D diamondshape decimationinterpolation filter is presented for illustration and comparison.
Open Science Index 113, 2016