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Toward an Accurate Acoustic Localization System
dc.contributor.advisor | Cheng, Wei | |
dc.contributor.author | Fotouhi, Mohammabagher | |
dc.date.accessioned | 2019-10-15T22:53:58Z | |
dc.date.submitted | 2019 | |
dc.identifier.other | Fotouhi_washington_0250O_20570.pdf | |
dc.identifier.uri | http://hdl.handle.net/1773/44688 | |
dc.description | Thesis (Master's)--University of Washington, 2019 | |
dc.description.abstract | In this dissertation, we propose an accurate and fast multi-pair simultaneous localization systems for smartphones without the need of infrastructure support. The system is a purely software-based solution (an App), which uses only the basic set of commodity smartphone capabilities including speakers, microphones, and Wi-Fi/Bluetooth. Audible-band acoustic signals and Wi-Fi/Bluetooth are jointly utilized for time of arrival (TOA)-based ranging. To simultaneously offer multi-smartphone-pair ranging, the acoustic chirps are encoded by Gold sequences, which has been extensively used in Code Division Multiple Access (CDMA) systems. We designed and implemented a fast One-way acoustic communication multi-pair ranging system as well as more accurate two-way acoustic communication multi-pair ranging system for comparison. Obtained ranges then will be used as input to a range-based localization approach in which the mobile devices can localize themselves related to each other. Our design is scalable with respect to the number of devices. The system is server-less and mobile devices compute their position locally so our system improves user privacy. Through extensive experimental evaluations over 8 different smartphones, the proposed system's positioning errors are around one meter and ranging errors are only a few centimeters for the actual phone-to-phone distances up to 60 meters in both indoor and outdoor environments. | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en_US | |
dc.rights | CC BY-SA | |
dc.subject | Acoustic ranging | |
dc.subject | indoor positioning | |
dc.subject | Localization | |
dc.subject | Computer science | |
dc.subject.other | Computer science and systems | |
dc.title | Toward an Accurate Acoustic Localization System | |
dc.type | Thesis | |
dc.embargo.terms | Delay release for 1 year -- then make Open Access | |
dc.embargo.lift | 2020-10-14T22:53:58Z |