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Título:
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A practical approach for NLOS mitigation in location-aware networks
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Autor/a:
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René, Játiva A.; Valdiviezo, Santiago; Espinosa, Andy; Vidal Manzano, José
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. SPCOM - Grup de Recerca de Processament del Senyal i Comunicacions |
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Abstract:
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This paper introduces a practical two-stage approach to achieve the mitigation of the Non Line Of Sight condition by using space-time diversity in timing-based mobile subscribers positioning systems. The first stage performs a coarse detection of the first (Line Of Sight) arrival, certainly attenuated due to the propagation channel, by performing a serial search over an observation window. Several GLRT and LMPT detectors have been evaluated in order not to miss the first arrival. Once the window where the LOS component lies has been properly detected, high resolution timing estimation is provided as a second stage. Two methods are considered for this work: Minimum Variance (MV) and Normalized Minimum Variance (NMV) estimation. A suitable channel model has been used to evaluate both approaches in terms of SNR and delay spread. These two methods have been compared for different configurations, and their operational characteristics have been obtained. Finally, these timing-error characteristics have been plugged to a link-level simulation platform to obtain their accuracy figures within a Weighted Linear Least Squares (WLLS) positioning system. |
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Abstract:
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Peer Reviewed |
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Materia(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica
-Wireless communication systems
-Antenna arrays
-GLRT detector
-NLOS mitigation
-TDOA based positioning systems
-Wireless sensor networks
-Antenna arrays
-Channel capacity
-Radio communication
-Signal to noise ratio
-GLRT detector
-Linear least squares
-Link-level simulations
-Nlos mitigations
-Operational characteristics
-Positioning system
-Propagation channels
-Space-time diversity
-Wireless sensor networks
-Comunicació sense fil, Sistemes de |
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Derechos:
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Tipo de documento:
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Artículo - Versión publicada
Objeto de conferencia |
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Editor:
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Institute of Electrical and Electronics Engineers (IEEE)
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Compartir:
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