Study of the effects of moving targets in SAR images for their detection.

González Marín, Julio Alberto (2014). Study of the effects of moving targets in SAR images for their detection.. Proyecto Fin de Carrera / Trabajo Fin de Grado, E.T.S.I. Telecomunicación (UPM).

Description

Title: Study of the effects of moving targets in SAR images for their detection.
Author/s:
  • González Marín, Julio Alberto
Contributor/s:
  • González Partida, José Tomás
Item Type: Final Project
Date: June 2014
Subjects:
Freetext Keywords: SAR, GMTI, DPCA, ATI, RDA, CFAR, RCMC, synthetic, aperture, radar, along, track, interferometry, phase, range, Doppler, algorithm, detection, centroid, squint, adaptive, Monte Carlo, simulation, migration.
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Señales, Sistemas y Radiocomunicaciones
UPM's Research Group: Microondas y Radar
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Synthetic Aperture Radar’s (SAR) are systems designed in the early 50’s that are capable of obtaining images of the ground using electromagnetic signals. Thus, its activity is not interrupted by adverse meteorological conditions or during the night, as it occurs in optical systems. The name of the system comes from the creation of a synthetic aperture, larger than the real one, by moving the platform that carries the radar (typically a plane or a satellite). It provides the same resolution as a static radar equipped with a larger antenna. As it moves, the radar keeps emitting pulses every 1/PRF seconds —the PRF is the pulse repetition frequency—, whose echoes are stored and processed to obtain the image of the ground. To carry out this process, the algorithm needs to make the assumption that the targets in the illuminated scene are not moving. If that is the case, the algorithm is able to extract a focused image from the signal. However, if the targets are moving, they get unfocused and/or shifted from their position in the final image. There are applications in which it is especially useful to have information about moving targets (military, rescue tasks,studyoftheflowsofwater,surveillanceofmaritimeroutes...).Thisfeatureiscalled Ground Moving Target Indicator (GMTI). That is why the study and the development of techniques capable of detecting these targets and placing them correctly in the scene is convenient. In this document, some of the principal GMTI algorithms used in SAR systems are detailed. A simulator has been created to test the features of each implemented algorithm on a general situation with moving targets. Finally Monte Carlo tests have been performed, allowing us to extract conclusions and statistics of each algorithm.

More information

Item ID: 37353
DC Identifier: http://oa.upm.es/37353/
OAI Identifier: oai:oa.upm.es:37353
Deposited by: Julio Alberto González Marín
Deposited on: 31 Aug 2015 08:34
Last Modified: 31 Aug 2015 08:35
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