Investigation of non-linear estimation of natural resonances in target identification
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Author
Chong, Choong Y.
Date
1983Advisor
Morgan, M. A.
Second Reader
Lee, Hung-Mou
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Show full item recordAbstract
This investigation considers a non-linear technique for
extracting natural resonances from transient electromagnetic
scattering responses of radar targets. These natural resonances
represent the complex poles of the target's transfer
function in the Laplace transform s-plane. The advantage of
their use in identification is their dependence only upon the
geometry and composition of the target and not upon the aspect
and polarization of the incident signal.
Based on recent theoretical research, a new. signal model
has been developed for describing the form of the transient
scattering response. This form precludes the optimal use of
previous methods for natural resonance extraction based on
Prony's algorithm. In this effort, a modified least-squares
approach is taken which can accommodate the actual form of
the transient signal. The algorithm is tested using simulated
signals with various noise levels and conclusions are drawn
concerning the viability of the method.
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