Results 21 to 30 of about 2,643 (173)

An Advanced Artificial Fish School Algorithm to Update Decision Tree for NLOS Acoustic Localization Signal Identification with the Dual-Receiving Method

Applied Sciences, 2023
For indoor sensor systems, it is essential to implement an extra supporting area notification part. To inform the real-time coordinates, the time difference of arrival (TDOA) algorithm can be introduced.
Ruixiang Kan, Mei Wang, Xin Liu, Xiaojuan Liu, Hongbing Qiu   +4 more
doaj   +1 more source

Location Variability Confidence Interval Model Using Statistical Inference for Over-rooftop Paths and Signal Data Classification Method [PDF]

Journal of Electromagnetic Engineering and Science
In this paper, statistical inference is used to predict a practical linear equation for determining signal loss rates over distance in a suburban over-rooftop path under both line-of-sight (LoS) and non-line-of-sight (NLoS) conditions.
Sang-Hoo Yoon, Sang-Wook Park, Young-Keun Yoon, Jong-Ho Kim   +3 more
doaj   +1 more source

Accurate Empirical Path Loss Models with Route Classification for mmWave Communications

International Journal of Antennas and Propagation, 2022
This paper presents accurate empirical path loss models with route classification for the high band frequency of 5 G wireless. Propagation path routes are mainly classified into line of sight (LOS) and non-line-of-sight (NLOS).
Supachai Phaiboon, Pisit Phokharatkul
doaj   +1 more source

Line-of-sight and non-line-of-sight links for dispersive terahertz wireless networks

APL Photonics, 2021
Despite the rapidly growing interest in exploiting millimeter and terahertz waves for wireless data transfer, the role of reflected non-line-of-sight (NLOS) paths in wireless networking is one of the least explored questions.
Yasaman Ghasempour, Yasith Amarasinghe, Chia-Yi Yeh, Edward Knightly, Daniel M. Mittleman   +4 more
doaj   +1 more source

Engineering-Economic Evaluation of Diffractive NLOS Backhaul (e3nb): A Techno-economic Model for 3D Wireless Backhaul Assessment

IEEE Access, 2022
Developing ways to affordably deliver broadband connectivity is one of the major issues of our time. In challenging deployment locations with irregular terrain, traditional Clear-Line-Of-Sight (CLOS) wireless links can be uneconomical to deploy, as the ...
Edward J. Oughton, Erik Boch, Julius Kusuma   +2 more
doaj   +1 more source

Non-Line-of-Sight Identification Based on Unsupervised Machine Learning in Ultra Wideband Systems

IEEE Access, 2019
Identification of line-of-sight (LOS) and non-line-of-sight (NLOS) propagation conditions is very useful in ultra wideband localization systems. In the identification, supervised machine learning is often used, but it requires exorbitant efforts to ...
Jiancun Fan, Ahsan Saleem Awan
doaj   +1 more source

A Robust Localization Algorithm Based on NLOS Identification and Classification Filtering for Wireless Sensor Network

Sensors, 2020
With the rapid development of information and communication technology, the wireless sensor network (WSN) has shown broad application prospects in a growing number of fields. The non-line-of-sight (NLOS) problem is the main challenge to WSN localization,
Long Cheng, Sihang Huang, Mingkun Xue, Yangyang Bi   +3 more
doaj   +1 more source

Non-line-of-sight imaging with arbitrary illumination and detection pattern

Nature Communications, 2023
Non-line-of-sight (NLOS) imaging aims at reconstructing targets obscured from the direct line of sight. Existing NLOS imaging algorithms require dense measurements at regular grid points in a large area of the relay surface, which severely hinders their ...
Xintong Liu, Jianyu Wang, Leping Xiao, Zuoqiang Shi, Xing Fu, Lingyun Qiu   +5 more
doaj   +1 more source

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

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