Applications of time-frequency signature analysis to target identification

Guillermo C. Gaunaurd; Hans C. Strifors

doi:10.1117/12.342960

22 March 1999 Applications of time-frequency signature analysis to target identification

Proceedings Volume 3723, Wavelet Applications VI; (1999) https://doi.org/10.1117/12.342960
Event: AeroSense '99, 1999, Orlando, FL, United States

Abstract

The overlapping subjects of target identification, inverse scattering and active classification have many applications that differ depending on specific sensors. Many useful techniques for these relevant subjects have been developed in the frequency and the time domains. A more recent approach views the target signatures in the combined or coupled time-frequency domain. For either ultra-wideband (UWB) projectors, or UWB processing these joint time- frequency techniques are particularly advantageous. Such analysis requires the use of some of the scores of non- linear distributions that have been proposed and studied over the years. Basic ones, such as the Wigner distribution and its many relatives, have been shown to belong to the well-studied `Cohen Class.' We will select half-a-dozen of these distributions to study applications that we have addressed and solved in several areas such as: (1) active sonar, (2) underwater mine classification using pulses from explosive sources, (3) identification of submerged shells having different fillers using dolphin bio-sonar `clicks,' and (4) broadband radar pulses to identify aircraft, other targets covered with dielectric absorbing layers, and also (land) mine-like objects buried underground, using a ground penetrating radar. These examples illustrate how the informative identifying features required for accurate target identification are extracted and displayed in this general time-frequency domain.

Citation Download Citation

Guillermo C. Gaunaurd and Hans C. Strifors "Applications of time-frequency signature analysis to target identification", Proc. SPIE 3723, Wavelet Applications VI, (22 March 1999); https://doi.org/10.1117/12.342960

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