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Exploiting WSSUS Multipath for GNSS Ranging

Enneking, Christoph and Antreich, Felix (2017) Exploiting WSSUS Multipath for GNSS Ranging. IEEE Transactions on Vehicular Technology, 66 (9), pp. 7663-7676. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/TVT.2017.2688724 ISSN 0018-9545

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Official URL: http://ieeexplore.ieee.org/document/7888594/


We propose a low-dimensional parameter estimation scheme for satellite-based ranging in the presence of an attenuated line-of-sight (LOS) signal and a time-varying number of multipath signals. This is of interest for landmobile users of global navigation satellite systems (GNSS) in diverse scattering environments with limited satellite visibility (e.g. a car moving through an urban canyon). Conventional ranging techniques, which rely solely on estimation of LOS parameters, ignore or suppress multipath and thus sacrifice available information; on the other hand, exhaustive approaches involving detection and estimation of each time-variant echo are too cumbersome in terms of parameter dimension. We suggest an unconditional maximum likelihood estimator (U-MLE) for joint estimation of LOS synchronization parameters and a small set of multipath distribution parameters. Our key assumptions are Gaussian wide-sense stationary uncorrelated scattering (WSSUS) and a known structure of the power delay profile (PDP). The proposed estimator uses as input data only a few complex-valued correlator outputs, which are provided by conventional navigation receivers, and its complexity is independent of the actual number of present echoes. Simulations demonstrate that the U-MLE improves accuracy and robustness of LOS synchronization for various model-matched and -mismatched multipath settings, including standardized and approved urban scenarios.

Item URL in elib:https://elib.dlr.de/115410/
Document Type:Article
Title:Exploiting WSSUS Multipath for GNSS Ranging
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Enneking, Christophchristoph.enneking (at) dlr.dehttps://orcid.org/0000-0001-6049-125X
Antreich, FelixFelix.Antreich (at) dlr.deUNSPECIFIED
Date:September 2017
Journal or Publication Title:IEEE Transactions on Vehicular Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1109/TVT.2017.2688724
Page Range:pp. 7663-7676
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Series Name:IEEE Transactions on Vehicular Technology
Keywords:Dense multipath, Global Positioning System (GPS), high-sensitivity GNSS, non-line-of-sight (NLOS)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Project Navigation 4.0
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Enneking, Christoph
Deposited On:17 Nov 2017 15:36
Last Modified:06 Sep 2019 15:17

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