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International Journal of Antennas and Propagation
Volume 2018, Article ID 3405908, 11 pages
https://doi.org/10.1155/2018/3405908
Research Article

On the Resolution Improvement of Radar Target Identification with Filtering Antenna Effects

1Electrical Engineering, Department of Electrical and Computer Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand
2Defence Technology Institute (Public Organization), Ministry of Defence, Nonthaburi, Thailand

Correspondence should be addressed to Akkarat Boonpoonga; ht.ca.bntumk.gne@b.tarakka

Received 26 August 2017; Revised 12 December 2017; Accepted 26 December 2017; Published 28 February 2018

Academic Editor: Jaume Anguera

Copyright © 2018 Lakkhana Bannawat et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

An investigation on the improvement of the resolution of a radar target identification system is presented in this paper. Degradation of resolution is mainly due to influence factors associated with antennas, including the strong coupling between transmitting and receiving antennas and the variation in the antenna response. A filtering technique was therefore introduced to mitigate the underlying problem. In the technique, the antenna effects were filtered out of the total response backscattered from the objects in the radar target identification system. The short-time matrix pencil method (STMPM) was then employed to extract the poles from the backscattered response in order to identify the object. Simulation and experimentation examples are illustrated to confirm the improvement of the resolution by filtering the antenna effects. The simulation and experimentation were divided into several categories, that is, different antennas and differently shaped objects, in order to validate the advantage of filtering the antenna effects. They were setup in order to demonstrate that the poles obtained from performing the STMPM without the filtering technique were mainly because of the antenna rather than the object’s characteristic. The results showed that the resolution of the identification was significantly increased when performing pole extraction and filtering the antenna effects.