Results 21 to 30 of about 169,270,621 (256)

A mobile localization method based on a robust extend Kalman filter and improved M-estimation in Internet of things

International Journal of Distributed Sensor Networks, 2020
As the key technology for Internet of things, wireless sensor networks have received more attentions in recent years. Mobile localization is one of the significant topics in wireless sensor networks.
Nan Hu, Chuan Lin, Fangjun Luan, Chengdong Wu, Qi Song, Li Chen   +5 more
doaj   +1 more source

Wireless sensor indoor positioning based on an improved particle filter algorithm

International Journal of Distributed Sensor Networks, 2020
Positioning by wireless sensor network is one of its main functions and has been widely used in many fields. However, when signal propagation is hindered, serious errors, non-line-of-sight errors, occur.
Pan Feng, Danyang Qin, Guangchao Xu, Ruolin Guo, Min Zhao   +4 more
doaj   +1 more source

Improved Kalman filter indoor positioning algorithm based on CHAN

Tongxin xuebao, 2023
Due to the raising complexity of the indoor environment, the influence of the non-line-of-sight error is gradually increasing in indoor positioning.How to reduce the non-line-of-sight error in the indoor positioning environment is particularly ...
Rui JIANG, Yue YU, Youyun XU, Xiaoming WANG, Dapeng LI   +4 more
doaj   +2 more sources

Reliability Analysis of Centralized Radio Access Networks in Non-Line-of-Sight and Line-of-Sight Scenarios

IEEE Access, 2019
The fifth generation (5G) wireless network technology is set to be standardized by 2020, where the main goals are to improve capacity, reliability, and energy efficiency while reducing latency and massively increasing connection density.
Daniel Peethala, Thomas Kaiser, A. J. Han Vinck   +2 more
doaj   +1 more source

Onsite Non-Line-of-Sight Imaging via Online Calibration

IEEE Photonics Journal, 2022
There has been increasing interest in deploying non-line-of-sight (NLOS) imaging systems for recovering objects hidden behind corners. Existing solutions need to calibrate the imaging system using auxiliary apparatus and additional detectors.
Zhengqing Pan, Ruiqian Li, Tian Gao, Zi Wang, Siyuan Shen, Ping Liu, Tao Wu, Jingyi Yu, Shiying Li   +8 more
doaj   +1 more source

Inertial measurement unit–aided dual-frequency radio frequency identification localization in line-of-sight and non-line-of-sight hybrid environment

International Journal of Distributed Sensor Networks, 2018
The mitigation of non-line-of-sight propagation conditions is one of main challenges in wireless signal–based indoor localization. When radio frequency identification localization technology is applied in applications, the received signal strength ...
Jie Wu, Minghua Zhu, Bo Xiao, Wei He
doaj   +1 more source

Accurate but fragile passive non-line-of-sight recognition

Communications Physics, 2021
Non-line-of-sight imaging allows reconstruction and recognition of an obscured object, but external manipulation of the data can lead to inaccurate results.
Yangyang Wang, Yaqin Zhang, Meiyu Huang, Zhao Chen, Yi Jia, Yudong Weng, Lin Xiao, Xueshuang Xiang   +7 more
doaj   +1 more source

The Impact of Vertical Salinity Gradient on Non-Line-of-Sight Underwater Optical Wireless Communication

IEEE Photonics Journal, 2021
The non-line-of-sight (NLOS) underwater communication can offer a viable route in signal propagation and coverage, thus mitigating the pointing, acquisition, and tracking difficulties in line-of-sight optical communication. However, implementing the NLOS
Mohammed Sait, Yujian Guo, Omar Alkhazragi, Meiwei Kong, Tien Khee Ng, Boon S. Ooi   +5 more
doaj   +1 more source

Empowering IoT: leveraging data sensor communication with LoRAWAN in diverse environments

Acta Polytechnica
The Internet of Things (IoT) connects countless devices, such as sensors and actuators, necessitating an efficient long-range communication technology.
Noprianto Noprianto, Habibie Ed Dien, Septian Enggar Sukmana, Fayyadh Al Baity, Mustika Mentari   +4 more
doaj   +1 more source

Development of a Disease Activity Index for the Assessment of VEXAS Syndrome (VEXAS‐DAI)

Arthritis Care &Research, EarlyView.
Objective Vacuoles, E1 enzyme, X‐linked, autoinflammatory, somatic syndrome (VEXAS) syndrome is characterized by a complex spectrum of inflammatory and hematologic manifestations. Clinical research to identify effective therapies is urgently needed but is hindered by the lack of validated outcome measures.
Kevin Byram, Heřman Mann, Danielle Hammond, Onima Chowdhury, Sinisa Savic, Yohei Kirino, Carmelo Gurnari, Maël Heiblig, Thibault Comont, Arsène Mekinian, Mrinal M. Patnaik, Lachelle D. Weeks, Gary Ho, Adam Al‐Hakim, Scott Goldberg, Marcela A. Ferrada, Sophie Georgin‐Lavialle, Peter C. Grayson, Emma M. Groarke, Bhavisha Patel, Megan Sullivan, Sarah A. Buckley, Bryan G. Harder, Raman Garcha, David B. Beck, Matthew J. Koster   +25 more
wiley   +1 more source