Results 191 to 200 of about 125,464,374 (223)

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, 2016
We 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
openaire   +1 more source

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.
Xin Wang 0003, Zongxin Wang, Bob O'Dea
openaire   +1 more source

Depth-NLOS: surface detail reconstruction from depth information in non-line-of-sight imaging

AOPC 2024: Computational Imaging Technology
kang meng, fengchang miao, hao liu
exaly   +2 more sources

Kriging estimator for mobile station positioning under non-line-of-sight (NLOS) conditions

2007 International Conference on Communications, Circuits and Systems, 2007
Estimation 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
openaire   +1 more source

Entangled and non-line-of-sight (NLOS) free-space photon quantum communication [Invited]

Journal of Optical Networking, 2005
Feature Issue on Optical Wireless Communications (OWC) We present new quantum communication (QC) schemes suitable for free-space (wireless) QC implementation. In particular, we present several entangled QC schemes and propose non-line-of-sight (NLOS) free-space photon QC.
Ronald E. Meyers, Keith S. Deacon
openaire   +1 more source

Integrating the Non-Line of Sight Launching System (NLOS-LS) in the United States Navy

2007
Abstract : The global war on terror emphasizes the need for a weapon system that can improve the self-defense capability of the U.S. Navy ship against small surface craft threats. This MSSE Capstone Project investigated the feasibility of integrating the Non-Line of Sight Launching System (NLOS-LS) onto U.S. Navy ships.
Don Tumbocon, Mei Li, Timothy Jones, Bryan Huang, Jonathon Emis   +4 more
openaire   +1 more source

Channel response measurements for diffuse non-line-of-sight (NLOS) optical communication links underwater

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
openaire   +1 more source

Non-Line-Of-Sight (NLOS) Ultraviolet And Indoor Free-Space Optical (FSO) Communications

2014
This chapter presents a new concept for exploiting non-line-of-sight (NLOS) free-space optical (FSO) communication. NLOS configuration can be achieved using scattering as a vehicle for a viable link, or using multipath propagation as in an indoor optical communication link.
openaire   +1 more source

Novel Approach of Spoofing Attack in VANET Location Verification for Non-Line-of-Sight (NLOS)

2017
Location verification of a vehicle in VANET under non-line-of-sight (NLOS) condition requires the questioned vehicle to be cooperatively located by questioner via another vehicle that has direct link with the vehicle in a state of NLOS condition. One of the challenges is to prove that the vehicle is physically located in a claimed position, and MHLVP ...
openaire   +1 more source

Concept of image based Non-Line-of-Sight (NLOS) localization in multipath environments

2015
Published ...
Chen, Si Wen, Seow, Chee Kiat, Wen, Kai
openaire   +1 more source