Results 151 to 160 of about 17,373 (186)
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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Simulation of NLOS (non-line-of-sight) 3D imaging system
AOPC 2017: Laser Components, Systems, and Applications, 2017This passage studies on theory and scene simulation of NLOS imaging. Based on math and physical properties, a simulation platform is built for a NLOS imaging system, including a femtosecond laser, a scanning galvo system, a lambertian surface, several hidden scenes, an ultrafast photodetector to transfer the intensity of laser echo signal to voltage ...
Jingjing Tan +3 more
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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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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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An evaluation of UWB localization under non line-of-sight (NLOS) propagation
2008 3rd International Symposium on Wireless Pervasive Computing, 2008In this paper we evaluate the statistical performances of the association of a low-complexity of the time of arrival (TOA) estimation algorithm and the location estimation algorithm in a non line-of-sight (NLOS) indoor environment. For that, we choose the time hopping (TH) code and pulse amplitude modulation (PAM) for ultra wideband (UWB) symbols and ...
Maali, Abdelmadjid +4 more
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