Results 1 to 10 of about 1,168,580 (142)

Time-of-arrival–based localization algorithm in mixed line-of-sight/non-line-of-sight environments

International Journal of Distributed Sensor Networks, 2020
A novel time-of-arrival–based localization algorithm in mixed line-of-sight/non-line-of-sight environments is proposed. First, an optimization problem of target localization in the known distribution of line-of-sight and non-line-of-sight is established,
Peixin Wang, Youming Li, Shengming Chang, Xiaoping Jin, Xiaoli Wang   +4 more
doaj   +2 more sources

Research on None-Line-of-Sight/Line-of-Sight Identification Method Based on Convolutional Neural Network-Channel Attention Module [PDF]

Sensors, 2023
None-Line-of-Sight (NLOS) propagation of Ultra-Wideband (UWB) signals leads to a decrease in the reliability of positioning accuracy. Therefore, it is essential to identify the channel environment prior to localization to preserve the high-accuracy Line ...
Jingjing Zhang, Qingwu Yi, Lu Huang, Zihan Yang, Jianqiang Cheng, Heng Zhang   +5 more
doaj   +2 more sources

Underwater Wireless Sensor Network-Based Localization Method under Mixed Line-of-Sight/Non-Line-of-Sight Conditions

Journal of Marine Science and Engineering, 2023
Source localization in underwater sensor networks (UWSNs) presents complex challenges due to sensor nodes drift caused by ocean currents, non-line-of-sight (NLOS) propagation resulting from underwater multipath effects, and environmental noise.
Ying Liu, Yingmin Wang, Cheng Chen, Chenxi Liu   +3 more
doaj   +3 more sources

A Line of Sight/Non Line of Sight Recognition Method Based on the Dynamic Multi-Level Optimization of Comprehensive Features [PDF]

Sensors
With the advent of the 5G era, high-precision localization based on mobile communication networks has become a research hotspot, playing an important role in indoor emergency rescue in shopping malls, smart factory management and tracking, as well as ...
Ziyao Ma, Zhongliang Deng, Zidu Tian, Yingjian Zhang, Jizhou Wang, Jilong Guo   +5 more
doaj   +2 more sources

Constrained L1-Norm Minimization Method for Range-Based Source Localization under Mixed Sparse LOS/NLOS Environments

Sensors, 2021
Under mixed sparse line-of-sight/non-line-of-sight (LOS/NLOS) conditions, how to quickly achieve high positioning accuracy is still a challenging task and a critical problem in the last dozen years.
Chengwen He, Yunbin Yuan, Bingfeng Tan
doaj   +1 more source

Accurate Underwater Optical Wireless Communication Model With Both Line-of-Sight and Non-Line-of-Sight Channels

IEEE Photonics Journal, 2022
Underwater optical wireless communication (UOWC) systems have been widely studied to achieve high-speed wireless communications. To investigate and design UOWC systems, a mathematical model to characterize the accurate performance of UOWC systems is ...
Chengwei Fang, Shuo Li, Ke Wang
doaj   +1 more source

Path Loss Measurements and Model Analysis in an Indoor Corridor Environment at 28 GHz and 38 GHz

Sensors, 2022
This paper examines the large-scale path loss models for an indoor corridor environment at frequencies of 28 and 38 GHz. The measurement environment consists of an indoor corridor with both line-of-sight (LOS) and non-line of sight (NLOS) scenarios using
Tolulope T. Oladimeji, Pradeep Kumar, Mohamed K. Elmezughi   +2 more
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

Experimental Analysis of Spatial Modulation Systems in Mixed LOS/NLOS Scenarios

IEEE Access, 2022
Spatial modulation (SM) as a multiple-input multiple-output (MIMO) technique is a solution suitable which offers, with low system complexity and cost, improved spectral efficiency compared to single-input-single-output (SISO) systems.
Yanni Zhou, Florin Doru Hutu, Guillaume Villemaud   +2 more
doaj   +1 more source

Prioritized User Association for Sum-Rate Maximization in UAV-Assisted Emergency Communication: A Reinforcement Learning Approach

Drones, 2022
Unmanned air vehicles (UAVs) used as aerial base stations (ABSs) can provide communication services in areas where cellular network is not functional due to a calamity.
Abdul Basit Siddiqui, Iraj Aqeel, Ahmed Alkhayyat, Umer Javed, Zeeshan Kaleem   +4 more
doaj   +1 more source