| Title | Distributed AoA-based Source Positioning in NLOS with Sensor Networks |
| Publication Type | Conference Paper |
| Year of Publication | 2015 |
| Authors | Gimenez-Febrer, P, Pagès-Zamora, A, Pereira, SSilva, López-Valcarce, R |
| Conference Name | IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP) |
| Date Published | 04/2015 |
| Publisher | IEEE |
| Conference Location | Brisbane, Australia |
| Keywords | compass, wsn |
| Abstract | This paper focuses on the problem of positioning a source using angle-of-arrival measurements taken by a wireless sensor network in which some of the nodes experience non-line-of-sight (NLOS) propagation conditions. In order to mitigate the errors induced by the nodes in NLOS, we derive an algorithm that combines the expectation-maximization algorithm with a weighted least-squares estimation of the source position so that the nodes in NLOS are eventually identified and discarded. Moreover, a distributed version of this algorithm based on a diffusion strategy that iteratively refines the position estimate while driving the network to a consensus is presented. |
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