SAR image reconstruction and autofocus by compressed sensing

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buir.contributor.authorArıkan, Orhan
buir.contributor.orcidArıkan, Orhan|0000-0002-3698-8888
dc.citation.epage932en_US
dc.citation.issueNumber6en_US
dc.citation.spage923en_US
dc.citation.volumeNumber22en_US
dc.contributor.authorUgur, S.en_US
dc.contributor.authorArıkan, Orhanen_US
dc.date.accessioned2016-02-08T09:42:41Z
dc.date.available2016-02-08T09:42:41Z
dc.date.issued2012-07-24en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractA new SAR signal processing technique based on compressed sensing is proposed for autofocused image reconstruction on subsampled raw SAR data. It is shown that, if the residual phase error after INS/GPS corrected platform motion is captured in the signal model, then the optimal autofocused image formation can be formulated as a sparse reconstruction problem. To further improve image quality, the total variation of the reconstruction is used as a penalty term. In order to demonstrate the performance of the proposed technique in wide-band SAR systems, the measurements used in the reconstruction are formed by a new under-sampling pattern that can be easily implemented in practice by using slower rate A/D converters. Under a variety of metrics for the reconstruction quality, it is demonstrated that, even at high under-sampling ratios, the proposed technique provides reconstruction quality comparable to that obtained by the classical techniques which require full-band data without any under-sampling.en_US
dc.identifier.doi10.1016/j.dsp.2012.07.011en_US
dc.identifier.issn1051-2004
dc.identifier.urihttp://hdl.handle.net/11693/21187
dc.language.isoEnglishen_US
dc.publisherElsevieren_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.dsp.2012.07.011en_US
dc.source.titleDigital Signal Processing: A Review Journalen_US
dc.subjectAutofocusen_US
dc.subjectCompressed sensingen_US
dc.subjectPhase erroren_US
dc.subjectSARen_US
dc.subjectTotal variationen_US
dc.subjectUnder-samplingen_US
dc.subjectAuto-focusen_US
dc.subjectCompressive sensingen_US
dc.subjectPhase erroren_US
dc.subjectSARen_US
dc.subjectTotal variationen_US
dc.subjectUnder-samplingen_US
dc.subjectSignal processingen_US
dc.subjectSynthetic aperture radaren_US
dc.subjectImage reconstructionen_US
dc.titleSAR image reconstruction and autofocus by compressed sensingen_US
dc.typeArticleen_US

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