Results 61 to 70 of about 2,647 (173)

Near‐Field 3D Stochastic Channel Modelling and Performance Analysis for Cooperative STAR‐RIS Systems With Cylindrical Transmit Arrays

IET Communications, Volume 20, Issue 1, January/December 2026.
This paper develops a near‐field three‐dimensional geometry‐based stochastic channel model for cooperative STAR‐RIS systems equipped with cylindrical transmit arrays at the base station. The proposed model captures spherical wavefront propagation effects and coupled azimuth‐elevation characteristics under realistic near‐field conditions.
Antwi Owusu Agyeman, Tweneboah‐Koduah Samuel, Ruhiya Abubakar, Martin Alabi Mensah, Emmanuel Atebawone, Anim Frederick Oturoku   +5 more
wiley   +1 more source

Multipath-Assisted Ultra-Wideband Vehicle Localization in Underground Parking Environment Using Ray-Tracing

Sensors
In complex underground parking scenarios, non-line-of-sight (NLOS) obstructions significantly impede positioning signals, presenting substantial challenges for accurate vehicle localization.
Shuo Hu, Lixin Guo, Zhongyu Liu, Shuaishuai Gao   +3 more
doaj   +1 more source

Transformer‐Enhanced Multi‐Satellite IRS Coordination for Next‐Generation LEO Communications

IET Communications, Volume 20, Issue 1, January/December 2026.
This paper introduces a novel transformer‐enhanced framework for multi‐satellite intelligent refelecting surfaces (IRS) coordination that addresses these fundamental limitations through physics‐informed neural architectures incorporating orbital dynamics modelling, multi‐head self‐attention mechanisms for temporal dependency capture across rapidly ...
Ali Hussein Radhi, Mahmood Mohassel Feghhi, Mohammad Ali Balafar   +2 more
wiley   +1 more source

Neurodynamic robust adaptive UWB localization algorithm with NLOS mitigation

Scientific Reports
For the robust localization in mixed line-of-sight (LOS) and non-line-of-sight (NLOS) indoor environments, we proposed a max-min optimization estimator from a measurement model and introduced an adaptive loss function to optimize the estimation. However,
Yanxu Liu, Enwen Hu, Yudong Chen, Changyou Guo   +3 more
doaj   +1 more source

TDOA-Based Mobile Localization Using Particle Filter With Multiple Motion and Channel Models

IEEE Access, 2019
Mobile terminal tracking is an important topic in wireless communications. A TDOA-based positioning method combining the interacting multiple models and the particle filter is proposed in this paper for non-cooperative target tracking in two dimensions ...
Nan Xia, Mary Ann Weitnauer
doaj   +1 more source

Path Tracing-Inspired Modeling of Non-Line-of-Sight SPAD Data

Sensors
Non-Line of Sight (NLOS) imaging has gained attention for its ability to detect and reconstruct objects beyond the direct line of sight, using scattered light, with applications in surveillance and autonomous navigation.
Stirling Scholes, Jonathan Leach
doaj   +1 more source

NLOS Identification and Weighted Least-Squares Localization for UWB Systems Using Multipath Channel Statistics

EURASIP Journal on Advances in Signal Processing, 2007
Non-line-of-sight (NLOS) identification and mitigation carry significant importance in wireless localization systems. In this paper, we propose a novel NLOS identification technique based on the multipath channel statistics such as the kurtosis, the mean
Hiroshi Inamura, Fujio Watanabe, Chia-Chin Chong, İsmail Güvenç   +3 more
doaj   +1 more source

Under-scanning non-line-of-sight imaging based on convolution approximation and optimization

APL Photonics
Non-line-of-sight (NLOS) imaging aims to reconstruct objects beyond line-of-sight view, enabling potential applications in various fields. However, a fundamental problem is that acquiring the transient images is time-consuming, making it challenging to ...
Jinye Miao, Yingjie Shi, Lingfeng Liu, Yi Wei, Fuyao Cai, Lianfa Bai, Enlai Guo, Jing Han   +7 more
doaj   +1 more source

Characterization of Non−Line−of−Sight (NLOS) Bias via Analysis of Clutter Topology

, 2016
Clutter-prone environments are challenging for range-based localization, where distances between references and the unlocalized node are estimated using wireless technologies like radio, ultrasound, etc. This is so due to the incidence of Non-Line-Of-Sight (NLOS) distance measurements as the direct path between the twp is occluded by the presence of ...
Hussain, M, Aytar, Y, Markham, A, Trigoni, N   +3 more
openaire   +1 more source

Ultra-Wideband Ranging Error Mitigation with Novel Channel Impulse Response Feature Parameters and Two-Step Non-Line-of-Sight Identification

Sensors
The effective identification and mitigation of non-line-of-sight (NLOS) ranging errors are essential for achieving high-precision positioning and navigation with ultra-wideband (UWB) technology in harsh indoor environments.
Hongchao Yang, Yunjia Wang, Shenglei Xu, Jingxue Bi, Haonan Jia, Cheekiat Seow   +5 more
doaj   +1 more source