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Digital lattice and ladder filter synthesis

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2 Author(s)
A. Gray ; University of California, Santa Barbara, Calif ; J. Markel

There is evidence that in addition to standard digital filter forms such as the direct, parallel, and cascade forms, digital lattice and ladder filters may play an important role in finite word length implementation problems. In this paper, techniques are developed in detail for efficiently synthesizing digital lattice and ladder filters from any stable direct form. In one form, a lattice filter canonic in terms of multiplies and delays is obtained. An internal scaling procedure is also introduced that will be of importance for optimizing one of the lattice forms for finite word length implementation.

Published in:

IEEE Transactions on Audio and Electroacoustics  (Volume:21 ,  Issue: 6 )