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Title: SSD: A robust RF location fingerprint addressing mobile devices' heterogeneity
Authors: Mahtab Hossain, A.K.M.
Jin, Y.
Soh, W.-S. 
Van, H.N.
Keywords: Bluetooth
heterogeneous devices
indoor localization
Location fingerprint
positioning system
signal strength difference (SSD)
Issue Date: 2013
Citation: Mahtab Hossain, A.K.M., Jin, Y., Soh, W.-S., Van, H.N. (2013). SSD: A robust RF location fingerprint addressing mobile devices' heterogeneity. IEEE Transactions on Mobile Computing 12 (1) : 65-77. ScholarBank@NUS Repository.
Abstract: Fingerprint-based methods are widely adopted for indoor localization purpose because of their cost-effectiveness compared to other infrastructure-based positioning systems. However, the popular location fingerprint, Received Signal Strength (RSS), is observed to differ significantly across different devices' hardware even under the same wireless conditions. We derive analytically a robust location fingerprint definition, the Signal Strength Difference (SSD), and verify its performance experimentally using a number of different mobile devices with heterogeneous hardware. Our experiments have also considered both Wi-Fi and Bluetooth devices, as well as both Access-Point(AP)-based localization and Mobile-Node (MN)-assisted localization. We present the results of two well-known localization algorithms (K Nearest Neighbor and Bayesian Inference) when our proposed fingerprint is used, and demonstrate its robustness when the testing device differs from the training device. We also compare these SSD-based localization algorithms' performance against that of two other approaches in the literature that are designed to mitigate the effects of mobile node hardware variations, and show that SSD-based algorithms have better accuracy. © 2002-2012 IEEE.
Source Title: IEEE Transactions on Mobile Computing
ISSN: 15361233
DOI: 10.1109/TMC.2011.243
Appears in Collections:Staff Publications

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