An Improved Local Stability Criterion for Digital Filters With Interference and Overflow Nonlinearity

This brief presents an improved local stability condition for digital filters with saturation overflow nonlinearities and external interference. This brief analyzes the local stability characteristics of digital filters with zero external interference and achieves the H ∞ performance level with exte...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. II, Express briefs Express briefs, 2020-03, Vol.67 (3), p.595-599
Main Authors: Kokil, Priyanka, Jogi, Srinivasulu, Ahn, Choon Ki, Kar, Haranath
Format: Article
Language:English
Subjects:
Asymptotic stability
Circuit stability
Digital filters
external interference
Interference
linear matrix inequality (LMI)
Numerical stability
overflow oscillation
saturation arithmetic
Stability analysis
Stability criteria
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Summary:This brief presents an improved local stability condition for digital filters with saturation overflow nonlinearities and external interference. This brief analyzes the local stability characteristics of digital filters with zero external interference and achieves the H ∞ performance level with external interference. The proposed criterion is shown to be an improvement over an existing criterion in the literature. Numerical examples are provided to show the usefulness of the established criterion.
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2019.2918788