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A cooperative multi-hop location verification for Non Line Of Sight (NLOS) in VANET
2011 IEEE Wireless Communications and Networking Conference, 2011Localization and exchanged position information plays a big role in Vehicular Ad-Hoc Networks (VANET). Several network services and applications, such as safety messages, require location information. The data are exchanged between vehicles within their radio communication range.
Osama Abumansoor, Azzedine Boukerche
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Compact, dual-wavelength, non-line-of-sight (NLOS) underwater imager
OCEANS'11 MTS/IEEE KONA, 2011High scattering environments, such as fog, sand, and turbid ocean water, severely degrade the performance of typical line-of-sight(LOS)/pseudo-monostatic imaging systems where the laser and receiver are on the same platform. Researchers at NAVAIR have developed a unique non-line-of-sight (NLOS)/bistatic imaging system where the illuminator and receiver
Derek Alley, Linda Mullen, Alan Laux
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Adaptive mobile localization algorithm for non-line-of-sight(NLOS) environments
2007 International Conference on Communications, Circuits and Systems, 2007Mobile positioning is made difficult by contamination of measured time of arrival (TOA) data caused by NLOS propagation. In this paper, a adaptive NLOS error mitigation algorithm is proposed without prior NLOS error distribution. Simulations in difference channel environments show that the performance of our algorithm comes close to meeting Cramer Rao ...
J.Y. Huang, Q. Wan, W.L. Yang
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The Effects of Non-line of Sight (NLOS) Channel on a User with Varying Device Orientations
2019Recently, there has been a growing interest in visible light communications (VLC) for indoor communication to meet the ever-increasing data demands. Most of the studies have considered the line-of-sight (LOS) channel for VLC communication. However, the LOS gain is constrained as the user moves away from the transmitter (Tx) or his device experiences ...
Shakir Ullah +2 more
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2016 International Conference on Circuit, Power and Computing Technologies (ICCPCT), 2016
This paper is written to convey the digital signal processing (DSP) issues experienced by wireless communication systems which are the limiting factors for enhanced spectral efficiency, link reliability and data rate, with respect to physical (PHY) layer and network throughput, latency and propagation delay pertaining to network layer for future ...
M. PremKumar +3 more
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This paper is written to convey the digital signal processing (DSP) issues experienced by wireless communication systems which are the limiting factors for enhanced spectral efficiency, link reliability and data rate, with respect to physical (PHY) layer and network throughput, latency and propagation delay pertaining to network layer for future ...
M. PremKumar +3 more
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Characterization of non-line-of-sight (NLOS) bias via analysis of clutter topology
Proceedings of the 2012 IEEE/ION Position, Location and Navigation Symposium, 2012Clutter-prone environments are challenging for range-based localization, where distances between anchors and the unlocalised node are estimated using wireless technologies like radio, ultrasound, etc. This is so due to the incidence of Non-Line-Of-Sight (NLOS) distance measurements as the direct path between the two is occluded by the presence of ...
Muzammil Hussain +3 more
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Direct Position Estimation Utilizing Non-Line-of-Sight (NLOS) GPS Signals
ION GNSS+, The International Technical Meeting of the Satellite Division of The Institute of Navigation, 2016We propose Direct Position Estimation (DPE) utilizing non-line-of-sight (NLOS) GPS signals for urban navigation. In urban environments, buildings reflect GPS signals, leading to reception of NLOS GPS signals. In addition, buildings obstruct GPS signals, resulting in reduced GPS signal availability. We treat NLOS GPS signals as additional line-of-sight (
Yuting Ng, Grace Xingxin Gao
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A TOA-based location algorithm reducing the errors due to non-line-of-sight (NLOS) propagation
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211), 2002An effective location algorithm, which considers non-line-of-sight (NLOS) propagation, is presented. By using a new variable to replace the square term and adding the loose variable, the problem becomes a mathematical programming problem, and then the NLOS propagation's effect can be evaluated.
Xin Wang 0003, Zongxin Wang, Bob O'Dea
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Depth-NLOS: surface detail reconstruction from depth information in non-line-of-sight imaging
AOPC 2024: Computational Imaging Technologykang meng, fengchang miao, hao liu
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Kriging estimator for mobile station positioning under non-line-of-sight (NLOS) conditions
2007 International Conference on Communications, Circuits and Systems, 2007Estimation of mobile station location is made difficult by nonsymmetric contamination of measured data caused by NLOS propagation effects. In this paper, a novel algorithm based on kriging method is proposed to reduce the effects of NLOS propagation on the location error. Simulation results show that the proposed algorithm clearly outperforms two other
J.Y. Huang, Z.X. Chen, Q. Wan, W.L. Yang
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