Target recognition using the time-frequency representation of the impulse response
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Abstract
- The backscatter of a target illuminated by a stepped-frequency radar represents the frequency response of the target as
seen by the radar and it can be modeled as a sum of exponentials. The inverse Fourier of the backscatter represents the
target impulse response. A time-frequency analysis (using Wigner-Ville) of the target backscatter should yield features
that are directly related to target scattering centers. These features can then be used for target recognition purposes. This
concept is first tested on a synthetic radar target that consists of five scattering centers. Next, the frequency response of
real backscatter of commercial aircraft models is examined using time-frequency analysis. The instantaneous frequency
and the group delay as extracted using the pseudo Wigner-Ville distribution are used as target recognition features. The
classification results are compared with those obtained using an optimal maximum-likelihood classifier. The performance
of time-frequency extracted features as target recognition tools is investigated in all scenarios of complete or partial
azimuth knowledge, and additive noise. The time-frequency analysis of the frequency response of the synthetic target is
examined and compared with that expected using a closed-form solution.
| Title | Target recognition using the time-frequency representation of the impulse response |
|---|---|
| Creator | Jouny, Ismail |
| Publisher | Proceedings of the SPIE |
| Academic Department | Electrical & Computer Engineering |
| Division | Engineering |
| Organization | Lafayette College |
| Date Issued | April 22, 2020 |
| Date Available | 2021-07-14 |
| Type | Article |
| Language | English |
| Keyword | Impulse/Frequency Response |
| Wigner-Ville | |
| radar target identification | |
| Bibliographic Citation | Jouny, I. (2020 Apr 22) "Target recognition using the time-frequency representation of the impulse response." Proceedings of the SPIE 11423: 114230X |
| Standard Identifier | Handle 10385/hd76s134w |
| DOI 10.1117/12.2550649 | |
| Permalink | http://hdl.handle.net/10385/hd76s134w |
| Rights Statement |
In Copyright
|
| Rights Holders | SPIE |
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| File | Jouny-ProceedingsoftheSPIE-vol11423-2020.pdf | Uploaded 2021-07-14 | Public | Download |
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