Cooperative Multi-Radio Localization in Heterogeneous Wireless Networks
Date Issued
2009
Date
2009
Author(s)
Fang, Shih-Hau
Abstract
Recent advances in mobile devices and ubiquity of wireless infrastructuresreate the opportunity to utilize heterogeneous wireless networksHWNs) for the localization. To efficiently exploit the spatial correlationmbedded in the RSS (received signal strength) measurementsrom HWNs, we proposed two algorithms via a cooperative approach.he first algorithm, called Direct Multi-Radio Fusion, tries to discoverhe spatial correlation after the information of measurements is reorganizedn order to minimize the redundancy among different wirelessadio technologies. After the reorganization, each new componentontains different amounts of correlation with respect to the locationstimation. The other algorithm, called Cooperative Eigen-Radio Positioning,akes a step further to incorporate the spatial discriminationroperty to efficiently estimate the location information.n our location system, principal component analysis is utilized toot only reorganize the information but also quantify the spatial discriminationrom an information theoretical perspective. We have implementedur algorithms for different wireless technologies involvinghe cellular GSM, DVB, FM and WLAN. All data are actual measurementsbtained by commercially available equipment and all experimentsre conducted in realistic outdoor/indoor environments ncluding the campus of National Taiwan University (NTU), Wen-Shanural area and BL building in NTU. The results show that the proposedlgorithm reduces 44.19-48.88% and 48.25-67.17% of the meanrror and 67% circular error probable, respectively, as compared tohe conventional approaches.
Subjects
Multi-Radio
Localization
Heterogeneous Wireless Networks
Type
thesis
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