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Analysis of Multipath Mitigation Techniques with Land Mobile Satellite Channel Model

Bhuiyan, Mohammad Zahidul H. and Zhang, Jie and Lohan, Elena-Simona and Wang, Wei and Sand, Stephan (2012) Analysis of Multipath Mitigation Techniques with Land Mobile Satellite Channel Model. Radioengineering, 21 (4), pp. 1067-1077. Czech Technical University. ISSN 1210-2512.

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Official URL: http://www.radioeng.cz/papers/2012-4.htm


Multipath is undesirable for Global Navigation Satellite System (GNSS) receivers, since the reception of multipath can create a significant distortion to the shape of the correlation function leading to an error in the receivers’ position estimate. Many multipath mitigation techniques exist in the literature to deal with the multipath propagation problem in the context of GNSS. The multipath studies in the literature are often based on optimistic assumptions, for example, assuming a static two-path channel or a fading channel with a Rayleigh or a Nakagami distribution. But, in reality, there are a lot of channel modeling issues, for example, satellite-to-user geometry, variable number of paths, variable path delays and gains, Non Line-Of-Sight (NLOS) path condition, receiver movements, etc. that are kept out of consideration when analyzing the performance of these techniques. Therefore, this is of utmost importance to analyze the performance of different multipath mitigation techniques in some realistic measurement-based channel models, for example, the Land Mobile Satellite (LMS) channel model [1]-[4], developed at the German Aerospace Center (DLR). The DLR LMS channel model is widely used for simulating the positioning accuracy of mobile satellite navigation receivers in urban outdoor scenarios. The main objective of this paper is to present a comprehensive analysis of some of the most promising techniques with the DLR LMS channel model in varying multipath scenarios. Four multipath mitigation techniques are chosen herein for performance comparison, namely, the narrow Early-Minus-Late (nEML), the High Resolution Correlator, the C/N0-based two stage delay tracking technique, and the Reduced Search Space Maximum Likelihood (RSSML) delay estimator. The first two techniques are the most popular and traditional ones used in nowadays GNSS receivers, whereas the later two techniques are comparatively new and are advanced techniques, recently proposed by the authors. In addition, the implementation of the RSSML is optimized here for a narrow-bandwidth receiver configuration in the sense that it now requires a significantly less number of correlators and memory than its original implementation. The simulation results show that the reduced-complexity RSSML achieves the best multipath mitigation performance in moderate-to-good carrier-to-noise density ratio with the DLR LMS channel model in varying multipath scenarios.

Item URL in elib:https://elib.dlr.de/95746/
Document Type:Article
Title:Analysis of Multipath Mitigation Techniques with Land Mobile Satellite Channel Model
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Bhuiyan, Mohammad Zahidul H.Finnish Geodetic InstituteUNSPECIFIEDUNSPECIFIED
Zhang, JieTampere University of TechnologyUNSPECIFIEDUNSPECIFIED
Lohan, Elena-SimonaTampere University of TechnologyUNSPECIFIEDUNSPECIFIED
Date:December 2012
Journal or Publication Title:Radioengineering
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 1067-1077
Publisher:Czech Technical University
Keywords:Multipath mitigation technique, GNSS receiver, channel model, performance analysis.
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 > Communications Systems
Deposited By: Sand, Dr Stephan
Deposited On:27 Mar 2015 09:05
Last Modified:08 Mar 2018 18:49

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