• KSII Transactions on Internet and Information Systems
    Monthly Online Journal (eISSN: 1976-7277)

Factor Graph-based Multipath-assisted Indoor Passive Localization with Inaccurate Receiver

Vol. 10, No. 2, February 28, 2016
10.3837/tiis.2016.02.015, Download Paper (Free):

Abstract

Passive wireless devices have increasing civilian and military applications, especially in the scenario with wearable devices and Internet of Things. In this paper, we study indoor localization of a target equipped with radio-frequency identification (RFID) device in ultra-wideband (UWB) wireless networks. With known room layout, deterministic multipath components, including the line-of-sight (LOS) signal and the reflected signals via multipath propagation, are employed to locate the target with one transmitter and a single inaccurate receiver. A factor graph corresponding to the joint posterior position distribution of target and receiver is constructed. However, due to the mixed distribution in the factor node of likelihood function, the expressions of messages are intractable by directly applying belief propagation on factor graph. To this end, we approximate the messages by Gaussian distribution via minimizing the Kullback-Leibler divergence (KLD) between them. Accordingly, a parametric message passing algorithm for indoor passive localization is derived, in which only the means and variances of Gaussian distributions have to be updated. Performance of the proposed algorithm and the impact of critical parameters are evaluated by Monte Carlo simulations, which demonstrate the superior performance in localization accuracy and the robustness to the statistics of multipath channels.


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Cite this article

[IEEE Style]
G. Hao, N. Wu, Y. Xiong, H. Wang and J. Kuang, "Factor Graph-based Multipath-assisted Indoor Passive Localization with Inaccurate Receiver," KSII Transactions on Internet and Information Systems, vol. 10, no. 2, pp. 703-722, 2016. DOI: 10.3837/tiis.2016.02.015.

[ACM Style]
Ganlin Hao, Nan Wu, Yifeng Xiong, Hua Wang, and Jingming Kuang. 2016. Factor Graph-based Multipath-assisted Indoor Passive Localization with Inaccurate Receiver. KSII Transactions on Internet and Information Systems, 10, 2, (2016), 703-722. DOI: 10.3837/tiis.2016.02.015.