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Novel Design of Recursive Differentiator Based on Lattice Wave Digital Filter.

Authors :
BARSAINYA, Richa
RAWAT, Tarun K.
Source :
Radioengineering; Apr2017 Part II, p387-395, 9p, 5 Diagrams, 5 Charts, 7 Graphs
Publication Year :
2017

Abstract

In this paper, a novel design of third and fifth order differentiator based on lattice wave digital filter (LWDF), established on optimizing L<subscript>1</subscript>-error approximation function using cuckoo search algorithm (CSA) is proposed. We present a novel realization of minimum multiplier differentiator using LWD structure leading to requirement of optimizing only N coefficients for N th order differentiator. The γ coefficients of lattice wave digital differentiator (LWDD) are computed by minimizing the L<subscript>1</subscript> -norm fitness function leading to a flat response. The superiority of the proposed LWDD is evident by comparing it with other differentiators mentioned in the literature. The magnitude response of the designed LWDD is found to be of high accuracy with flat response in a wide frequency range. The simulation and statistical results validates that the designed minimum multiplier LWDD circumvents the existing one in terms of minimum absolute magnitude error, mean relative error (dB) and efficient structural realization, thereby making the proposed LWDD a promising approach to digital differentiator design. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
12102512
Database :
Supplemental Index
Journal :
Radioengineering
Publication Type :
Academic Journal
Accession number :
122718173
Full Text :
https://doi.org/10.13164/re.2017.0387