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篇名 |
Indoor Positioning Systems for Different Mobile Terminal Devices
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並列篇名 | Indoor Positioning Systems for Different Mobile Terminal Devices |
作者 | Ta-Te Lu、Sheng-Cheng Yeh、Guang Fan |
英文摘要 | With the growing affordability of smartphones, increasing emphasis has been placed on smartphone location-based services (LBSs) aimed at providing users with information about their immediate environments. In addition to identifying user locations, LBSs can be extended to navigation systems and the provision of traffic information. However, the Global Positioning System, which is used extensively, requires an unobstructed line of sight between system satellites and mobile devices. Any obstruction between these components would result in positioning errors. Studies have adopted Wi-Fi access points (APs) in in a Wi-Fi environment for developing indoor systems. Although pattern matching (PM) is a relatively accurate positioning method in such systems, the PM method entails establishing multiple received signal strength indicators (RSSI) databases for different types of mobile devices during the offline phase. The proposed methods do not necessitate creating multiple radio maps for different smartphones, and can thereby reduce the labor and time costs of establishing multiple RSSI databases during the offline phase. Therefore, this study adopted signal differences among wireless APs to establish radio propagation models and mitigate the aforementioned positioning errors, with a maximal increase of 59.6% in positioning accuracy. |
起訖頁 | 1811-1822 |
關鍵詞 | Indoor positioning system、Location-based services、Pattern matching、Radio propagation model、Received signal strength indicator |
刊名 | 網際網路技術學刊 |
期數 | 201811 (19:6期) |
出版單位 | 台灣學術網路管理委員會 |
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