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An improved orthogonal digital filter structure
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DOI：10.1016/j.sigpro.2009.07.006.png)
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A novel structure is derived for digital filter implementation. This structure is actually an improved version of an existing one in terms of implementation efficiency and reducing finite word length (FWL) effects. Expression of roundoff noise gain is obtained for the proposed structure. Design examples are given to demonstrate the performance of this structure and to compare it with the existing one and the classical minimum roundoff state-space realizations. Numerical examples show that the proposed structure outperforms the others in terms of minimizing roundoff noise as well as implementation efficiency. (C) 2009 Elsevier B.V. All rights reserved.
Keyword:
Digital filters
Orthogonal structures
Finite word length effects
Roundoff noise gain
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