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TIME-DELAY ESTIMATION IN A SPATIALLY STRUCTURED MODEL USING DECOUPLED ESTIMATORS FOR TEMPORAL AND SPATIAL PARAMETERS

Antreich, Felix and Nossek, Josef A. and Seco, Gonzalo and Swindlehurst, A. Lee (2008) TIME-DELAY ESTIMATION IN A SPATIALLY STRUCTURED MODEL USING DECOUPLED ESTIMATORS FOR TEMPORAL AND SPATIAL PARAMETERS. In: 2008 International ITG Workshop on Smart Antennas, WSA 2008. 2008 International ITG Workshop on Smart Antennas, WSA 2008, 2008-02-26 - 2008-02-27, Darmstadt, Germany.

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Abstract

This paper deals with the joint estimation of time-delay and spatial (direction-of-arrival, DOA) parameters of several replicas of a known signal in an unknown spatially correlated field. Unstructured and structuredmodels have been proposed for maximum likelihood (ML) estimators in the literature. The former suffers from a severe performance degradation in some scenarios, whereas the latter involves huge complexity. It is shown how the extended invariance principle (EXIP) can be applied to obtain estimates with the quality of those of the structured model, but with the complexity of the unstructured one. We present a method to improve the quality of the time-delay estimates obtained with an unstructured spatial model when an estimate of the DOAs is available. Exemplarily, simulation results for time-delay estimation for GPS (Global Positioning System) are included and confirm that our proposal approaches the Cramer-Rao lower bound (CRLB) of the structured model even when suboptimal DOA estimates obtained by ESPRIT are introduced.

Item URL in elib:https://elib.dlr.de/53635/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:TIME-DELAY ESTIMATION IN A SPATIALLY STRUCTURED MODEL USING DECOUPLED ESTIMATORS FOR TEMPORAL AND SPATIAL PARAMETERS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Antreich, FelixUNSPECIFIEDUNSPECIFIED
Nossek, Josef A.Technische Universität München (TUM)UNSPECIFIED
Seco, GonzaloUniversitat Autonoma de Barcelona (UAB)UNSPECIFIED
Swindlehurst, A. LeeThe University of California, Irvine (UCI)UNSPECIFIED
Date:8 February 2008
Journal or Publication Title:2008 International ITG Workshop on Smart Antennas, WSA 2008
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Array signal processing, parameter estimation, direction of arrival estimation, Global Positioning System
Event Title:2008 International ITG Workshop on Smart Antennas, WSA 2008
Event Location:Darmstadt, Germany
Event Type:international Conference
Event Dates:2008-02-26 - 2008-02-27
Organizer:TU-Darmstadt, ITG, IEEE
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W KN - Kommunikation/Navigation
DLR - Research area:Space
DLR - Program:W KN - Kommunikation/Navigation
DLR - Research theme (Project):W - Vorhaben GNSS2/Neue Dienste und Produkte (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Antreich, Felix
Deposited On:10 Mar 2008
Last Modified:12 Dec 2013 20:30

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