Schedule-based sequential localization in asynchronous wireless networks
2014 (English)In: EURASIP Journal on Advances in Signal Processing, ISSN 1687-6172, E-ISSN 1687-6180, Vol. 2014, no 1, 16- p.Article in journal (Refereed) Published
In this paper, we consider the schedule-based network localization concept, which does not requiresynchronization among nodes and does not involve communication overhead. The concept makesuse of a common transmission sequence, which enables each node to perform self-localization andto localize the entire network, based on noisy propagation-time measurements. We formulate theschedule-based localization problem as an estimation problem in a Bayesian framework. This pro-vides robustness with respect to uncertainty in such system parameters as anchor locations and timing devices. Moreover, we derive a sequential approximate maximum a posteriori (AMAP) estimator.The estimator is fully decentralized and copes with varying noise levels. By studying the fundamentalconstraints given by the considered measurement model, we provide a system design methodology which enables a scalable solution. Finally, we evaluate the performance of the proposed AMAPestimator by numerical simulations emulating an impulse-radio ultra-wideband (IR-UWB) wireless network.
Place, publisher, year, edition, pages
2014. Vol. 2014, no 1, 16- p.
Wireless positioning, Cooperative localization, Asynchronous networks
Research subject Electrical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-141050DOI: 10.1186/1687-6180-2014-16ISI: 000332014700001ScopusID: 2-s2.0-84904538074OAI: oai:DiVA.org:kth-141050DiVA: diva2:694582
QC 201403312014-02-062014-02-062014-03-31Bibliographically approved