On the design of a broad class of 2-D recursive digital filters with fan, diamond and elliptically-symmetric responses
作者： Qunshan Gu , M.N.S. Swamy
DOI: 10.1109/82.326587
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摘要: This paper deals with the design of a broad class 2-D recursive digital filters including general fan, diamond and elliptically-symmetric filters. At first, explicit quadrant /spl plusmn/45/spl deg/ fan is reviewed. A full-plane filter (both axes are nearly length 2 pi/) can easily be obtained through an appropriate transformation filter. Using this as prototype, very simple spectral then proposed to circularly-symmetric (radius ap//spl pi/). These share same lattice wave structure employ only first or second order all-pass sections which realized by two-port adaptors. They provide desirable properties such low sensitivity, high dynamic range good stability even under finite arithmetic conditions. above mentioned prototypes, multirate approach introduced deal arbitrary angle orientation, axes. Finally, some examples given. >
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