Experimental Results on Moving Targets Focusing in UWB Low Frequency SAR

Document type: Conference Papers
Peer reviewed: Yes
Author(s): Viet Thuy Vu, Thomas Sjögren, Mats Pettersson, Hans-Jürgen Zepernick, Anders Gustavsson
Title: Experimental Results on Moving Targets Focusing in UWB Low Frequency SAR
Conference name: The Institution of Engineering and Technology International Conference on Radar Systems
Year: 2007
Publisher: IET
City: Edinburgh
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Signal Processing (Sektionen för teknik – avd. för signalbehandling)
School of Engineering S- 372 25 Ronneby
+46 455 38 50 00
Authors e-mail: viet.thuy.vu@bth.se
Language: English
Abstract: The main objective of this paper is to present and evaluate a
method to detect moving targets in Ultra Wideband (UWB)
low frequency Synthetic Aperture Radar (SAR). Moving
target detection at low radar frequencies is associated with
long integration time and has to handle azimuth focusing for
reliable detection. The examined method tests different
hypotheses on relative speeds in the area of interest. The
optimum step size between the hypotheses is found from a
point target approximation. Experimental results show that
the ability to detect moving targets increases significantly. In
this study, the improvement of the Signal-to-Clutter Noise
Ratio (SCNR) is up to approximately 20dB using a single
antenna. The focusing method allows initial estimates in
speed of moving targets. The SAR data, which is used in our
experiments, was collected by the airborne UWB low
frequency CARABAS-II system.
Subject: Signal Processing\General
Signal Processing\Radar and Sonar