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Improved algorithm for constrained roundoff noise minimisation in digital filters

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1 Author(s)
Xiao, C. ; Dept. of Electr. Eng., Sydney Univ., NSW, Australia

An improved algorithm is derived for minimising the global roundoff noise gain G of nth-order digital filters, yielding at least n(n-1)/2 coefficients of the filter structure to be zero. This algorithm is based on the necessary and sufficient conditions for the minimum G subject to the transformation matrix being triangular, and these conditions are achieved by modifying the Smith and Bomar (1988) iterative algorithm

Published in:

Electronics Letters  (Volume:31 ,  Issue: 1 )