RT info:eu-repo/semantics/article
T1 Analysis of reliable deployment of TDOA local positioning architectures
A1 Díez González, Javier
A1 Álvarez, Rubén
A1 Verde García, Paula
A1 Ferrero-Guillén, Rubén
A1 Pérez García, Hilde
A2 Ingenieria Mecanica
K1 Ingeniería mecánica
K1 A-TDOA
K1 Cramèr-Rao bounds
K1 Localization
K1 Local positioning systems
K1 Optimization
K1 Sensor failure
K1 TDOA
K1 Wireless sensor networks
K1 3313 Tecnología E Ingeniería Mecánicas
AB [EN] Local Positioning Systems (LPS) are supposing an attractive research topic over the last few years. LPS are ad-hoc deployments of wireless sensor networks for particularly adapt to the environment characteristics in harsh environments. Among LPS, those based on temporal measurements stand out for their trade-off among accuracy, robustness and costs. But, regardless the LPS architecture considered, an optimization of the sensor distribution is required for achieving competitive results. Recent studies have shown that under optimized node distributions, time-based LPS cumulate the bigger error bounds due to synchronization errors. Consequently, asynchronous architectures such as Asynchronous Time Difference of Arrival (A-TDOA) have been recently proposed. However, the A-TDOA architecture supposes the concentration of the time measurement in a single clock of a coordinator sensor making this architecture less versatile. In this paper, we present an optimization methodology for overcoming the drawbacks of the A-TDOA architecture in nominal and failure conditions with regards to the synchronous TDOA. Results show that this optimization strategy allows the reduction of the uncertainties in the target location by 79% and 89.5% and the enhancement of the convergence properties by 86% and 33% of the A-TDOA architecture with regards to the TDOA synchronous architecture in two different application scenarios. In addition, maximum convergence points are more easily found in the A-TDOA in both configurations concluding the benefits of this architecture in LPS high-demanded application
PB Elsevier
SN 0925-2312
LK http://hdl.handle.net/10612/14443
UL http://hdl.handle.net/10612/14443
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 02-may-2024