Passive Localization and Synchronization Using Arbitrary Signals

Time-of-arrival (TOA) localization is tightly coupled with sensor time synchronization. Synchronization can be obtained by GPS, atomic clocks, or message exchange protocols. All methods affect the energy sources and the synchronization protocols use valuable bandwidth. We present self-synchronized l...

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Bibliographic Details
Published in:IEEE transactions on signal processing 2014-04, Vol.62 (8), p.2143-2150
Main Authors: Jean, Oren, Weiss, Anthony J.
Format: Article
Language:English
Subjects:
Algorithms
Applied sciences
Clocks
Cramér-Rao lower bound
Detection, estimation, filtering, equalization, prediction
Ellipsoids
Exact sciences and technology
Information, signal and communications theory
Localization
maximum likelihood
Maximum likelihood estimation
Networks
Position (location)
Protocol (computers)
Protocols
Sensors
Signal and communications theory
Signal, noise
Synchronism
Synchronization
Telecommunications and information theory
time of arrival
Vectors
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Description
Summary:Time-of-arrival (TOA) localization is tightly coupled with sensor time synchronization. Synchronization can be obtained by GPS, atomic clocks, or message exchange protocols. All methods affect the energy sources and the synchronization protocols use valuable bandwidth. We present self-synchronized localization algorithms that rely exclusively on TOA measurements performed by the sensor network on passing sources rendering it completely passive. The same methods can be applied to time-difference-of- arrival (TDOA) measurements allowing the use of a larger family of signals. Localization performance is close to that provided by a perfectly synchronized network. Such algorithms can also be used for sensor network synchronization and communication networks in general.
ISSN:1053-587X
1941-0476
DOI:10.1109/TSP.2014.2307281