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An improved algorithm is presented for ordering the poles and zeros of fixed-point recursive digital filters so as to minimize the effect of roundoff noise. The method proceeds by successive improvement, and yields local optima which cannot be improved further by interchanging a pair of poles or zeros. The resulting assignments found for four filters of orders 8-22 are the best known.
Acoustics, Speech and Signal Processing, IEEE Transactions on (Volume:24 , Issue: 4 )
Date of Publication: Aug 1976