Hybrid TDOA/RSS based localization for visible light systems

buir.contributor.authorKazıklı, Ertan
buir.contributor.authorGezici, Sinan
dc.citation.epage28en_US
dc.citation.spage19en_US
dc.citation.volumeNumber86en_US
dc.contributor.authorKazıklı, Ertanen_US
dc.contributor.authorGezici, Sinanen_US
dc.date.accessioned2020-01-28T11:53:42Z
dc.date.available2020-01-28T11:53:42Z
dc.date.issued2019
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractIn a visible light positioning (VLP) system, a receiver can estimate its location based on signals transmitted by light emitting diodes (LEDs). In this manuscript, we investigate a quasi-synchronous VLP system, in which the LED transmitters are synchronous among themselves but are not synchronized with the receiver. In quasi-synchronous VLP systems, position estimation can be performed by utilizing time difference of arrival (TDOA) information together with channel attenuation information, leading to a hybrid localization system. To specify accuracy limits for quasi-synchronous VLP systems, the Cramér–Rao lower bound (CRLB) on position estimation is derived in a generic three-dimensional scenario. Then, a direct positioning approach is adopted to obtain the maximum likelihood (ML) position estimator based directly on received signals from LED transmitters. In addition, a two-step position estimator is proposed, where TDOA and received signal strength (RSS) estimates are obtained in the first step and the position estimation is performed, based on the TDOA and RSS estimates, in the second step. The performance of the two-step positioning technique is shown to converge to that of direct positioning at high signal-to-noise ratios based on asymptotic properties of ML estimation. Finally, CRLBs and performance of the proposed positioning techniques are investigated through simulations.en_US
dc.embargo.release2022-03-01
dc.identifier.doi10.1016/j.dsp.2018.12.001en_US
dc.identifier.issn1051-2004
dc.identifier.urihttp://hdl.handle.net/11693/52876
dc.language.isoEnglishen_US
dc.publisherElsevieren_US
dc.relation.isversionofhttps://dx.doi.org/10.1016/j.dsp.2018.12.001en_US
dc.source.titleDigital Signal Processing: A Review Journalen_US
dc.subjectEstimationen_US
dc.subjectReceived signal strength (RSS)en_US
dc.subjectTime difference of arrival (TDOA)en_US
dc.subjectLocalizationen_US
dc.subjectVisible lighten_US
dc.titleHybrid TDOA/RSS based localization for visible light systemsen_US
dc.typeArticleen_US

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