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dc.contributor.authorAlp, Yaşar Kemalen_US
dc.contributor.authorArıkan, Orhanen_US
dc.contributor.authorBayri, A.en_US
dc.coverage.spatialMarrakech, Moroccoen_US
dc.date.accessioned2016-02-08T12:09:22Z
dc.date.available2016-02-08T12:09:22Z
dc.date.issued2013en_US
dc.identifier.urihttp://hdl.handle.net/11693/28040
dc.descriptionDate of Conference: 9-13 Sept. 2013en_US
dc.description.abstractIn phased array antennas, by varying the complex element weights beam patterns with desired shapes can be synthesized and/or steered to desired directions. These complex weights can be implemented by using amplitude controllers and phase shifters at the system level. Since controlling the phase of an RF signal is much easier than controlling its power, many systems do not have an individual amplitude controller for each element. Hence, beamshaping and steering are to be achieved by varying only the element phases. In this work, a new approach is proposed for phase-only beam synthesis problem. In this approach, the phase-only beam synthesis is formulated as a non-convex quadratically constrained quadratic problem (QCQP). Then, it is relaxed to a convex semidefinite problem (SDP), which generally provides an undesired high rank solution. An iterative technique is developed to obtain a rank-1 solution to the relaxed convex SDP. Conducted experiments show that, proposedmethod can successfully synthesize beam shapes with desired characteristics and steering directions by using only the element phases. © 2013 EURASIP.en_US
dc.language.isoEnglishen_US
dc.source.title21st European Signal Processing Conference (EUSIPCO 2013)en_US
dc.subjectAntenna phased arraysen_US
dc.subjectDirectional patterns (antenna)en_US
dc.subjectPower convertersen_US
dc.subjectRelaxation processesen_US
dc.subjectSignal processingen_US
dc.subjectBeam patternen_US
dc.subjectConvex relaxationen_US
dc.subjectPhased array antennasen_US
dc.subjectQuadratic problemen_US
dc.subjectsemidefinite problemen_US
dc.subjectIterative methodsen_US
dc.titlePhase-only beam synthesis by iterative semidefinite relaxations with rank refinementen_US
dc.typeConference Paperen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.publisherIEEEen_US
dc.contributor.bilkentauthorArıkan, Orhan
buir.contributor.orcidArıkan, Orhan|0000-0002-3698-8888en_US


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