Results 1 to 10 of about 2,919 (165)

Yeni Nesil Kablosuz Ağ Teknolojisi: Wimax Standardının İncelenmesi

open access: yesDüzce Üniversitesi Bilim ve Teknoloji Dergisi, 2016
Wimax (Worldwide Interoperability for Microwave Access) teknolojisi, Wimax Forum tarafından çeşitli standartları geliştirilen, geniş alanda iletişim sağlayan bir kablosuz ağ teknolojisidir. Çalışma boyunca Wimax hakkında bilgi verilmiştir.
Arafat Şentürk   +4 more
doaj  

Passive Non-Line-of-Sight Imaging Based on Diffuse Reflection [PDF]

open access: yesJisuanji gongcheng
Non-Line-of-Sight (NLOS) imaging, which combines imaging and computational reconstruction, describes the reconstruction of hidden scenes in a medium by capturing scattered or reflected information without directly imaging the scene. NLOS imaging is still
WU Cuicui, WANG Weidong
doaj   +1 more source

NLOS Mitigation in Sparse Anchor Environments with the Misclosure Check Algorithm

open access: yesRemote Sensing, 2019
The presence of None-line-of-sight (NLOS) is one of the major challenging issues in time of arrival (TOA) based source localization, especially for the sparse anchor scenarios.
Lei Wang   +6 more
doaj   +1 more source

Estimation of no-line-of-sight sound source using ratio of peak and root mean square values of cross correlation function

open access: yesNihon Kikai Gakkai ronbunshu, 2019
Estimation of no-line-of-sight (NLOS) condition is a key technology for practical indoor localization. In this paper, a novel method to estimate the NLOS sound source using ratio of peak and root mean square values of cross correlation function is ...
Taichi HAYASHI   +2 more
doaj   +1 more source

NLOS Identification and Correction Based on Multidimensional Scaling and Quasi-Accurate Detection

open access: yesIEEE Access, 2019
In wireless sensor networks, most of the previous NLOS identification is based on error estimation model established by raw data. In this paper, we propose a method of NLOS identification named NIMQ based on multidimensional scaling (MDS) and Quasi ...
Yuhong Zhu   +6 more
doaj   +1 more source

A Post-Processing Multipath/NLoS Bias Estimation Method Based on DBSCAN

open access: yesSensors
Positioning based on Global Navigation Satellite Systems (GNSSs) in urban environments always suffers from multipath and Non-Line-of-Sight (NLoS) effects. In such conditions, the GNSS pseudorange measurements can be affected by biases disrupting the GNSS-
Yihan Guo   +3 more
doaj   +1 more source

Indoor Mobile Localization in Wireless Sensor Network under Unknown NLOS Errors

open access: yesInternational Journal of Distributed Sensor Networks, 2013
Localization is one of the key techniques in wireless sensor network. One of the main problems in indoor mobile localization is non-line-of-sight (NLOS) propagation. And the NLOS effects will lead to a large localization error. So the NLOS problem is the
Long Cheng   +3 more
doaj   +1 more source

Analysis of Machine Learning-Based NLOS Signal Identification Algorithm for UWB Indoor Localization Using CIR Waveform Features [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Ultra-wideband (UWB) technology stands out among numerous indoor positioning techniques due to its high operating frequency, low interception capability, resistance to multipath effects, and strong penetration.
K. Wang, C. Yang
doaj   +1 more source

RM-CSTV: An effective high-resolution method of non-line-of-sight millimeter-wave radar 3-D imaging

open access: yesNational Science Open
Non-line-of-sight (NLOS) imaging is a novel radar sensing technology that enables the reconstruction of hidden targets. However, it may suffer from synthetic aperture length reduction caused by ambient occlusion. In this study, a complex total variation (
Liu Xinyuan   +6 more
doaj   +1 more source

An NLOS Ranging Error Mitigation Method for 5G Positioning in Indoor Environments

open access: yesApplied Sciences
Positioning based on wireless signals such as mobile communication networks has become an important means to provide high-precision location services in environments where satellite signals are blocked.
Jingrong Liu, Zhongliang Deng, Enwen Hu
doaj   +1 more source

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