dc.contributor.authorTan, Nicholas Yan Ming
dc.date.accessioned2016-11-11T05:53:44Z
dc.date.available2016-11-11T05:53:44Z
dc.date.issued2016
dc.identifier.urihttp://hdl.handle.net/10356/69141
dc.description.abstractWith the increasing distribution of WiFi deployment in urban areas, outdoor localization without the aid of GPS is made possible by relying on the WiFi framework of mobile devices and existing network infrastructures. Despite the presence of existing outdoor localization solutions, it provides an unsatisfactory accuracy. Furthermore, there has been much research on indoor localization but the outdoor aspect has been largely overlooked. To address these issues, this paper proposes WOLoc (WiFi-only Outdoor Localization) as a solution which returns meter-level accuracy achieved by comprehensively processing the WiFi hotspot labels gathered by crowdsensing. Comparing against existing solutions, WOLoc avoids fingerprinting metropolitan areas with the labels due to the complexity of networks outdoor. WOLoc also does not use over-simplified data synthesis methods (e.g., centroid) which omits crucial information in the labels. Alternatively, using a semi-supervised manifold learning technique, labeled and unlabeled data is processed. The output of the unlabeled part will contain the estimated locations for both users and WiFi hotspots. Through conducting extensive experiments with WOLoc in several outdoor zones with varying density of known access points, the results offer higher accuracy over other contemporary methods.en_US
dc.format.extent66 p.en_US
dc.language.isoenen_US
dc.rightsNanyang Technological University
dc.subjectDRNTU::Engineeringen_US
dc.titleHuman centric sensing by Android phones - WOLocen_US
dc.typeFinal Year Project (FYP)en_US
dc.contributor.supervisorLuo Junen_US
dc.description.degreeCOMPUTER SCIENCEen_US


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