Results 161 to 170 of about 24,730 (232)
Hyperbolic Spatial Covariance Modeling with Adaptive Signal Filtering for Robust Wi-Fi Indoor Positioning. [PDF]
Sensors (Basel)Wang W, Liu M.
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A Line of Sight/Non Line of Sight Recognition Method Based on the Dynamic Multi-Level Optimization of Comprehensive Features. [PDF]
Sensors (Basel)Ma Z +5 more
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Resolving Non Line-of-Sight (NLoS) motion using Speckle
Imaging and Applied Optics 2018 (3D, AO, AIO, COSI, DH, IS, LACSEA, LS&C, MATH, pcAOP), 2018Motion of objects hidden from view is recovered by tracking displacements in speckle patterns produced by the coherently illuminated object. A latent image may additionally be recovered by examining spatial correlations in the speckle pattern.
Muralidhar Madabhushi Balaji +4 more
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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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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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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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OCEANS'11 MTS/IEEE KONA, 2011
Presented are experimental measurements comparing the frequency (i.e. - impulse) response (up to 1GHz) for an underwater optical communications channel as a function of water clarity using collimated or diffuse laser light. The measurement technique used is adapted from a previously reported method used for measuring the channel response of collimated ...
Brandon Cochenour, Linda Mullen
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Presented are experimental measurements comparing the frequency (i.e. - impulse) response (up to 1GHz) for an underwater optical communications channel as a function of water clarity using collimated or diffuse laser light. The measurement technique used is adapted from a previously reported method used for measuring the channel response of collimated ...
Brandon Cochenour, Linda Mullen
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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), 2002 An 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.
null Xin Wang +2 more
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