Novel sensor location scheme using time-of-arrival estimates
(2012) IET Signal Processing — Vol. 6, n° 1, p. 8-13 (2012)
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- Abstract
- This study proposes a novel scheme for locating an asynchronous sensor with synchronised beacons using time-of-arrival (TOA) estimates. In this scheme, a reference beacon initiates the localisation by emitting a ranging signal, and the sensor position is estimated by measuring the length of the signal propagation path from the reference beacon to every beacon via the sensor. The associated Cramér-Rao bound (CRB) is derived, and a localisation algorithm, which does not need a priori knowledge about the TOA estimation accuracy, is proposed based on the constrained least square (LS) principle. It is illustrated by numerical experiments that the proposed scheme features a lower CRB compared to the conventional time-difference-of-arrival (TDOA)-based scheme, and the performance of the proposed algorithm is close to the CRB, especially when the sensor is in the centre area surrounded by the beacons. © 2012 The Institution of Engineering and Technology.
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Citations
Wang, T. (2012). Novel sensor location scheme using time-of-arrival estimates. IET Signal Processing, 6(1), 8-13. https://doi.org/10.1049/iet-spr.2010.0305 (Original work published 2012)