Results 41 to 50 of about 17,502 (187)

NLOS Signal Detection Based on Single Orthogonal Dual-Polarized GNSS Antenna

International Journal of Antennas and Propagation, 2017
Nowadays users have a high demand for the accuracy of position and velocity, but errors caused by non-line-of-sight (NLOS) signals cannot be removed effectively. Since the GNSS signal is right-hand circular polarized (RHCP), the axial ratio of the strong
Ke Zhang, Baiyu Li, Xiangwei Zhu, Huaming Chen, Guangfu Sun   +4 more
doaj   +1 more source

Non-line-of-sight Node Localization based on Semi-Definite Programming in Wireless Sensor Networks

, 2009
An unknown-position sensor can be localized if there are three or more anchors making time-of-arrival (TOA) measurements of a signal from it. However, the location errors can be very large due to the fact that some of the measurements are from non-line ...
Chen, Hongyang, Lui, Kenneth W. K., Poor, H. Vincent, So, H. C., Wang, Zizhuo   +4 more
core   +2 more sources

Characteristic of social and communicative criteria of foreign students adaptation [PDF]

, 2016
Target tracking with ultra-wideband (UWB) signals in indoor environments is a challenging problem due to the presence of multipath and non-line-of-sight conditions (NLOS).
Bakalo, Olha, Бакало, Ольга
core   +2 more sources

WLS Localization Using Skipped Filter, Hampel Filter, Bootstrapping and Gaussian Mixture EM in LOS/NLOS Conditions

IEEE Access, 2019
We present robust range-based localization algorithms for which range measurements are used to estimate the location parameter. Non-line-of-sight (NLOS) propagation of signal can deteriorate the estimation performance severely in the indoor and crowded ...
Chee-Hyun Park, Joon-Hyuk Chang
doaj   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

Non-Line-of-Sight Moving Target Detection Method Based on Noise Suppression

Remote Sensing, 2022
At the present time, most of existing security systems only detect and track targets in line-of-sight (LOS). However, in practice, the locations of targets are often out of the line of sight.
Yilin Wei, Bing Sun, Yuetong Zhou, Haochuan Wang   +3 more
doaj   +1 more source

Protocol‐Agnostic Meta Key Distribution for Encrypted Wireless Communications Enabled by Space‐Time‐Coding Metasurface

Advanced Science, Volume 13, Issue 7, 3 February 2026.
This paper presents a programmable metasurface‐based Meta Key Distribution (MKD) system for secure, protocol‐independent key exchange in indoor wireless settings. By embedding entropy into the wireless channel, it enables lightweight, compatible cryptographic key generation.
Xinyu Li, Long Chen, Guanxiong Shen, Kezhan Zhao, Ze Gu, Qian Ma, Jian Wei You, Tie Jun Cui   +7 more
wiley   +1 more source

A Novel Mobile Target Localization Approach for Complicate Underground Environment in Mixed LOS/NLOS Scenarios

IEEE Access, 2020
Accurate positioning of the shearer remains a challenge for automation of the longwall coal mining process. In this paper, the popular Ultra-wideband (UWB) positioning system that has attracted considerable attention is adopted to obtain the target node ...
Bo Cao, Shibo Wang, Shirong Ge, Xiuze Ma, Wanli Liu   +4 more
doaj   +1 more source

NLOS Identification- and Correction-Focused Fusion of UWB and LiDAR-SLAM Based on Factor Graph Optimization for High-Precision Positioning with Reduced Drift

Remote Sensing, 2022
In this study, we propose a tightly coupled integrated method of ultrawideband (UWB) and light detection and ranging (LiDAR)-based simultaneous localization and mapping (SLAM) for global navigation satellite system (GNSS)-denied environments to achieve ...
Zhijian Chen, Aigong Xu, Xin Sui, Yuting Hao, Cong Zhang, Zhengxu Shi   +5 more
doaj   +1 more source

Uplink Performance Analysis in D2D-Enabled mmWave Cellular Networks

, 2017
In this paper, we provide an analytical framework to analyze the uplink performance of device-to-device (D2D)-enabled millimeter wave (mmWave) cellular networks.
Gursoy, M. Cenk, Turgut, Esma
core   +2 more sources