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A comparison of Bayesian localization methods in the presence of outliers

N.G. Ferrara ; Henk Wymeersch (Institutionen för signaler och system, Kommunikationssystem) ; E.S. Lohan ; J. Nurmi
2017 13th International Wireless Communications and Mobile Computing Conference, IWCMC 2017 p. 1546-1551. (2017)
[Konferensbidrag, refereegranskat]

Localization of a user in a wireless network is challenging in the presence of malfunctioning or malicious reference nodes, since if they are not accounted for, large localization errors can ensue. We evaluate three Bayesian methods to statistically identify outliers during localization: an exact method, an expectation maximization (EM) method proposed earlier, and a new method based on Variational Bayesian EM (VBEM). Simulation results indicate similar performance for the latter two schemes, with the VBEM algorithm able to provide a statistical description of the user location, rather than an estimate as in the simpler EM case. In contrast to previous studies, we find that there is a significant gap between the approximate methods and the exact method, the cause of which is discussed.

Nyckelord: Bayesian methods, Localization, Outliers, Wireless networks



Denna post skapades 2017-09-01.
CPL Pubid: 251574

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Kommunikationssystem (1900-2017)

Ämnesområden

Telekommunikation

Chalmers infrastruktur