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Issue No.11 - November (2010 vol.9)
pp: 1551-1562
Arvin Wen Tsui , National Taiwan University
Wei-Cheng Lin , National Taiwan University
Wei-Ju Chen , National Taiwan University
Polly Huang , National Taiwan University
Hao-Hua Chu , National Taiwan University
Wi-Fi ingerprint-based localization is currently the most promising approach to building metropolitan-scale localization systems for both indoor and outdoor environments. A Wi-Fi fingerprint localization system makes use of a radio map that contains Wi-Fi signals received at various locations, and uses the map for location estimation. Thus, the accuracy of a Wi-Fi fingerprint localization system greatly depends on the quality of its radio map. This paper explores various properties of a metropolitan radio map that may affect the accuracy of Wi-Fi fingerprint localization systems. In this study, metropolitan-scale radio maps are obtained using war walking and war driving. These maps contain hundreds of thousands of access points and signal samples. A detailed comparison analysis of selected radio map properties reveals how different map properties affect the difference between the positional accuracies of the driving and walking radio maps in Wi-Fi fingerprint-based localization.
Metropolitan-scale Wi-Fi localization, radio maps, war driving.
Arvin Wen Tsui, Wei-Cheng Lin, Wei-Ju Chen, Polly Huang, Hao-Hua Chu, "Accuracy Performance Analysis between War Driving and War Walking in Metropolitan Wi-Fi Localization", IEEE Transactions on Mobile Computing, vol.9, no. 11, pp. 1551-1562, November 2010, doi:10.1109/TMC.2010.121
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