Range resolution improvement in passive bistatic radars using deconvolution

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buir.advisorÇetin, A. Enis
dc.contributor.authorArslan, Musa Tunç
dc.date.accessioned2016-04-18T13:51:34Z
dc.date.available2016-04-18T13:51:34Z
dc.date.copyright2015-11
dc.date.issued2015-11
dc.date.submitted16-12-2010
dc.descriptionIncludes bibliographical references (pages 53-55).en_US
dc.descriptionThesis (M.S.): Bilkent University, The Department of Electrical and Electronics Engineering, 2015.en_US
dc.descriptionCataloged from PDF version of thesis.en_US
dc.description.abstractPassive radar (PR) systems attract interests in radar community due to its lower cost and power consumption over conventional radars. However, one of the main disadvantages of a PR system is its low range resolution. The reason for this is, the range resolution depends on the bandwidth of the transmitted waveform and in a PR scenario, it is impossible to change transmitted waveform properties of a commercial broadcast. In this thesis, a post processing scheme is proposed to improve the range resolution of an FM broadcast based PR system. In the post processing scheme, the output of the ambiguity function is re-expressed as convolution of the autocorrelation of the transmitted signal and a channel impulse response. Therefore, it is shown that it is possible to use deconvolution methods to compute the channel impulse response using the output of the ambiguity function and the autocorrelation of the transmitted signal. Thus, using deconvolution to solve the channel impulse response provides an increase in the range resolution of the PR system. The method successfully increases the target separation distance and range resolution of a PR system using single FM channel signal. The conventional ambiguity function is able to separate two targets when the targets have about 17 km between each other where as the deconvolution based post processing method can decrease this to about 10 km. The deconvolution based post processing methods also decreases the side lobes around the target when the system uses multi channel FM signals. For a scenario in which three FM channels are employed, the highest side lobe is 1.2 dB below the main target peak and after deconvolution, this highest side lobe decreases to about 10 dB below the main target peak.en_US
dc.description.provenanceSubmitted by Dilek Doğanoğlu (doral@bilkent.edu.tr) on 2016-04-18T13:51:34Z No. of bitstreams: 1 musa_tunc_arslan.pdf: 3459558 bytes, checksum: 38c5ffb39f717d6c73b76b963c0c7ba1 (MD5)en
dc.description.provenanceMade available in DSpace on 2016-04-18T13:51:34Z (GMT). No. of bitstreams: 1 musa_tunc_arslan.pdf: 3459558 bytes, checksum: 38c5ffb39f717d6c73b76b963c0c7ba1 (MD5) Previous issue date: 2015-11en
dc.description.statementofresponsibilityMusa Tunç Arslan.en_US
dc.format.extentxi, 61 leaves, graphics.en_US
dc.identifier.itemidB150528
dc.identifier.urihttp://hdl.handle.net/11693/28943
dc.language.isoEnglishen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectPassive radaren_US
dc.subjectRange resolutionen_US
dc.subjectDeconvolutionen_US
dc.subjectTarget separationen_US
dc.titleRange resolution improvement in passive bistatic radars using deconvolutionen_US
dc.title.alternativeTers evrişim kullanarak pasif radarlarla menzil çözünürlüğü artırmaen_US
dc.typeThesisen_US
thesis.degree.disciplineElectrical and Electronic Engineering
thesis.degree.grantorBilkent University
thesis.degree.levelMaster's
thesis.degree.nameMS (Master of Science)

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