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dc.contributor.advisorArıkan, Orhan
dc.contributor.authorTan, Onur
dc.date.accessioned2016-01-08T20:05:49Z
dc.date.available2016-01-08T20:05:49Z
dc.date.issued2010
dc.identifier.urihttp://hdl.handle.net/11693/17051
dc.descriptionAnkara : The Department of Electrical and Electronics Engineering and The Institute of Engineering and Sciences of Bilkent University, 2010.en_US
dc.descriptionThesis (Master's) -- Bilkent University, 2010.en_US
dc.descriptionIncludes bibliographical references leaves 72-74.en_US
dc.description.abstractThe systems used for terrain profile estimation arise when the safety flight issues in civil flight transport and in military applications become important. These systems are developed for the purpose of terrain avoidance and safe flight. In this thesis, we study two techniques in estimating the terrain profile of the synthetically generated terrain which is achieved by means of signal processing. The estimation performance of the techniques is observed according to the results of flight simulations realized on the simulation environment. In the simulations, an aircraft with a pulse-Doppler radar scans a synthetic terrain according to the scanning patterns to generate the received signals. The techniques that we propose, are applied to the output of the pulse-Doppler process. The first technique is based on the usage of the first and the middle reflection range points in the clutter received signal. An adaptive thresholding method is developed for robust detection of these points. Accurate detection of these range points is crucial in the estimation performance of the first approach. The other technique uses the relation between the elevation angle θ and the clutter received signal amplitude ratio of the two receiver antennas R1 and R2 in finding the θ angles of the reflections in corresponding range values. In this approach, accurate estimation of the angle of arrival is important on the performance of estimation. Especially for far ranges, the errors in the estimation become more sensitive to the errors in the elevation angle θ. Finally, over a set of synthetically generated terrain profiles, the error performance of these two techniques are investigated and compared.en_US
dc.description.statementofresponsibilityTan, Onuren_US
dc.format.extentxii, 74 leaves, illustrationsen_US
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectPulse-Doppler Processingen_US
dc.subjectFractal Methodsen_US
dc.subjectSynthetic Environmentsen_US
dc.subjectTerrain Mapsen_US
dc.subjectTerrain Avoidanceen_US
dc.subjectPulse-Doppler Radarsen_US
dc.subjectDetectionen_US
dc.subject.lccTK6592.D6 T36 2010en_US
dc.subject.lcshDoppler radar.en_US
dc.subject.lcshPulse compression radar.en_US
dc.subject.lcshFractals.en_US
dc.titleTerrain profile estimation over a synthetic terrain by using pulse-doppler radaren_US
dc.typeThesisen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.publisherBilkent Universityen_US
dc.description.degreeM.S.en_US


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