DocumentCode :
1449104
Title :
Novel sensor location scheme using time-of-arrival estimates
Author :
Wang, Tao
Author_Institution :
ICTEAM Inst., Univ. Catholique de Louvain, Louvain la Neuve, Belgium
Volume :
6
Issue :
1
fYear :
2012
fDate :
2/1/2012 12:00:00 AM
Firstpage :
8
Lastpage :
13
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.
Keywords :
least squares approximations; sensor placement; time-of-arrival estimation; CRB; Cramer-Rao bound; TDOA scheme; TOA estimates; asynchronous sensor; constrained LS principle; constrained least square principle; localisation algorithm; ranging signal; reference beacon; sensor location scheme; sensor position; signal propagation path; synchronised beacons; time-difference-of-arrival scheme;
fLanguage :
English
Journal_Title :
Signal Processing, IET
Publisher :
iet
ISSN :
1751-9675
Type :
jour
DOI :
10.1049/iet-spr.2010.0305
Filename :
6152266
Link To Document :
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