Result: Multipath track association for over-the-horizon radar using Lagrangian relaxation

Title:
Multipath track association for over-the-horizon radar using Lagrangian relaxation
Authors:
RUTTEN, Mark G, MASKELL, Simon, BRIERS, Mark, GORDON, Neil J
Source:
Signal and data processing of small targets 2004 (Orlando FL, 13-15 April 2004)SPIE proceedings series. :452-463
Publisher Information:
Bellingham WA: SPIE, 2004.
Publication Year:
2004
Physical Description:
print, 15 ref
Original Material:
INIST-CNRS
Subject Terms:
Electronics, Electronique, Optics, Optique, Physics, Physique, Telecommunications, Télécommunications, Sciences exactes et technologie, Exact sciences and technology, Sciences appliquees, Applied sciences, Telecommunications et theorie de l'information, Telecommunications and information theory, Théorie de l'information, du signal et des communications, Information, signal and communications theory, Théorie du signal et des communications, Signal and communications theory, Signal, bruit, Signal, noise, Détection, estimation, filtrage, égalisation, prédiction, Detection, estimation, filtering, equalization, prediction, Algorithme, Algorithm, Algoritmo, Complexité calcul, Computational complexity, Complejidad computación, Détection cible, Target detection, Detección blanco, Estimation a priori, A priori estimation, Estimación a priori, Haute fréquence, High frequency, Alta frecuencia, Ionosphère, Ionosphere, Ionosfera, Localisation, Localization, Localización, Modèle 2 dimensions, Two dimensional model, Modelo 2 dimensiones, Monitorage, Monitoring, Monitoreo, Multiplicateur Lagrange, Lagrange multiplier, Multiplicador Lagrange, Méthode Lagrange, Lagrangian method, Método Lagrange, Méthode combinatoire, Combinatorial method, Método combinatorio, Méthode relaxation, Relaxation method, Método relajación, Optimisation combinatoire, Combinatorial optimization, Optimización combinatoria, Poursuite cible, Target tracking, Propagation trajet multiple, Multipath propagation, Propagación trayecto múltiple, Propagation visibilité directe, Line of sight propagation, Propagación visibilidad directa, Précision, Accuracy, Precisión, Radar transhorizon, Beyond the horizon radar, Radar transhorizonte, Relaxation, Relajación, Réfraction, Refraction, Refracción
Document Type:
Conference Conference Paper
File Description:
text
Language:
English
Author Affiliations:
Intelligence Surveillance and Reconnaissance Division, Defence Science and Technology Organisation, PO Box 1500, Edinburgh, SA 5111, Australia
Cooperative Research Centre for Sensor Signal and Information Processing, Department of Electrical and Electronic Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
QinetiQ Ltd., Malvern Technology Centre, St Andrews Rd, Malvern, Worcestershire, United Kingdom
Access URL:
http://pascal-francis.inist.fr/vibad/index.php?action=search&terms=16383139
Rights:
Copyright 2005 INIST-CNRS
CC BY 4.0
Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS
Notes:
Telecommunications and information theory
Accession Number:
edscal.16383139
Database:
PASCAL Archive

Further Information

Over-the-horizon radar (OTHR) uses the refraction of high frequency radiation through the ionosphere in order to detect targets beyond the line-of-sight horizon. The complexities of the ionosphere can produce multipath propagation, which may result in multiple resolved detections for a single target. When there are multipath detections, an OTHR tracker will produce several spatially separated tracks for each target. Information conveying the state of the ionosphere is required in order to determine the true location of the target and is available in the form of a set of possible propagation paths, and a transformation from measured coordinates into ground coordinates for each path. Since there is no a-priori information as to how many targets are in the surveillance region, or which propagation path gave rise to which track, there is a joint target and propagation path association ambiguity which must be resolved using the available track and ionospheric information. The multipath track association problem has traditionally been solved using a multiple hypothesis technique, but a shortcoming of this method is that the number of possible association hypotheses increases exponentially with both the number of tracks and the number of possible propagation paths. This paper proposes an algorithm based on a combinatorial optimisation method to solve the multipath track association problem. The association is formulated as a two-dimensional assignment problem with additional constraints. The problem is then solved using Lagrangian relaxation, which is a technique familiar in the tracking literature for the multidimensional assignment problem arising in data association. It is argued that due to a fundamental property of relaxations convergence cannot be guaranteed for this problem. However, results show that a multipath track-to-track association algorithm based on Lagrangian relaxation, when compared with an exact algorithm, provides a large reduction in computational effort, without significantly degrading association accuracy.