Fundamentals of statistical signal processing: estimation theory
Fundamentals of statistical signal processing: estimation theory
Digital processing of random signals: theory and methods
Digital processing of random signals: theory and methods
Sensor networks with mobile agents
MILCOM'03 Proceedings of the 2003 IEEE conference on Military communications - Volume I
Detection and estimation in sensor arrays using weighted subspacefitting
IEEE Transactions on Signal Processing
Decentralized detection in sensor networks
IEEE Transactions on Signal Processing
Support-based and ML approaches to DOA estimation in a dumb sensor network
IEEE Transactions on Signal Processing
Guest Editorial Self-Organizing Distributed Collaborative Sensor Networks
IEEE Journal on Selected Areas in Communications
Energy-efficient detection in sensor networks
IEEE Journal on Selected Areas in Communications
An Advanced DV-Hop Localization Algorithm for Wireless Sensor Networks
Wireless Personal Communications: An International Journal
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Recently, the DOA (direction of arrival) estimation of an acoustic wavefront has been considered in a setting where the inference task is performed by a wireless sensor network (WSN) made of isotropic (hence individually useless) sensors. The WSN was designed according to the SENMA (SEnsor Network with Mobile Agents) architecture with a mobile agent (MA) that successively queries the sensors lying inside its field of view. In this paper the ideal assumption previously made that the visibility of individual sensors is governed by deterministic laws is relaxed; this yields, interestingly, simpler analytical formulas. Both fast/simple and optimal DOA-estimation schemes are proposed, and an optimization of the MA's observation management is also carried out, with the surprising finding that the MA ought to orient itself at an oblique angle to the expected DOA, rather than directly toward it. The extension to multiple sources is also considered; intriguingly, per-source DOA accuracy is higher when there is more than one source. In all cases, performance is investigated by simulation and compared, when appropriate, with asymptotic bounds; these latter are usually met after a moderate number of MA dwells.