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Design and implementation of multiplier-less tunable 2-D FIR filters using McClellan transformation

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2 Author(s)
K. S. Yeung ; Dept. of Electr. & Electron. Eng., Hong Kong Univ., China ; S. C. Chan

This paper proposes new structures for realizing tunable 2D fan and elliptical filters with different spectral characteristics using McClellan transformation. The 1D prototype is a variable digital filter obtained from the interpolation of a set of desirable impulse responses and is implemented using the Farrow structure. The coefficients of the sub-filters and the transformation parameters in the Farrow structure are represented in SOPOT (sum-of-powers-of-two), which can be easily implemented as simple shift-and-add operations. Furthermore, the transformation part can be shared between the sub-filters, leading to significant saving in hardware complexity. Several design examples are given to demonstrate the effectiveness and feasibility of the proposed approach.

Published in:

Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on  (Volume:5 )

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