Hybrid optimization technique for the design of digital differentiator

Authors:
Damanpreet Singh;Ranjit Kaur
Affiliations:
Department of CSE, Sant Longowal Institute of Engineering & Technology, Longowal, Punjab, India;University College of Engineering, Punjabi University, Patiala, Punjab, India
Venue:
CSECS'11/MECHANICS'11 Proceedings of the 10th WSEAS international conference on Circuits, Systems, Electronics, Control & Signal Processing, and Proceedings of the 7th WSEAS international conference on Applied and Theoretical Mechanics
Year:
2011

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Abstract

The new differentiators are important for applications where the first, second, or higher-order derivative of a digital signal is required to be accurate at mid-range frequencies. In this paper hybrid optimization method is proposed for the design of digital differentiator. The proposed method explores and exploits the search space locally as well as globally to formulate the error between the practical digital differentiator and the ideal digital differentiator. A procedure is described which can be used to design digital differentiators satisfying prescribed specifications, not only simple and fast but also optimal in the least-squares sense.