Results 61 to 70 of about 4,193 (185)
IET Microwaves, Antennas &Propagation, Volume 20, Issue 1, January/December 2026.This study introduces a compact H‐shaped 1‐bit linearly polarised Reconfigurable Intelligent Surface (RIS) prototype, specifically engineered for high‐gain and beam‐scanning applications at 5.1 GHz. The fabricated 20 × 20 RIS array exhibited a gain of 23.1 dBi, a scanning capability of ± 60° and an aperture efficiency of approximately 57%, as validated
Rocky Chakma +4 more
wiley +1 more source
Dual-mode Antenna Tracking System for Rocket Launch Applications
Jurnal Rekayasa ElektrikaRocket launches are complex events that require tracking antennas to maintain a communication link. This study introduces a hybrid tracking strategy that combines manual and program modes by utilizing a predetermined trajectory of the rocket.
Muh. Fakhri +6 more
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Leakage protection system of underground power grid based on ZigBee wireless sensor network
Gong-kuang zidonghua, 2014 In view of shortcomings such as poor reliability, high error rate existed in current leakage protection system of underground high-voltage power grid，a design scheme of leakage protection system of underground power grid based on ZigBee wireless sensor ...
ZHU Yankai +4 more
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Inferring Motion and Location Using WLAN RSSI
, 2009 We present novel algorithms to infer movement by making use of inherent fluctuations in the received signal strengths from existing WLAN infrastructure. We evaluate the performance of the presented algorithms based on classification metrics such as recall and precision using annotated traces obtained over twelve hours effectively from different types ...
Kavitha Muthukrishnan +2 more
openaire +2 more sources
Aviation Electronics, Information Technology, Telecommunications, Electricals, ControlsEnhancing internet accessibility on campus is vital for both academic purposes and general internet usage. This research aims to expand the outdoor Wi-Fi coverage at Telkom University, taking into account wireless signal propagation, infrastructure, and ...
Rayhan Sidiq Kaffa +4 more
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Fault-tolerant localization method for underground mine based on wireless sensor network
矿业科学学报, 2017 This paper described a wireless-sensor-network based monitoring and positioning system for underground mine.This system regards the condition of ensuring the function of positioning as the basic requirements and uses reasonable fault-tolerant mechanism ...
Liu Xiaoyang, Liang Tao, Hu Qiaosen
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Iterative Positioning Algorithm for Indoor Node Based on Distance Correction in WSNs
Sensors, 2019 Node position information is critical in wireless sensor networks (WSN). However, existing positioning algorithms commonly have the issue of low positioning accuracy due to noise interferences in communication.
Jing Chen +4 more
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Studies in Science and Technology, 2018 Recently, many libraries have introduced a UHF-band RFID tag system because of its convenience. However, the UHF-band RFID reader has wide coverage area and this can reduce the management efficiency by unintentionally reading unnecessary tags.
Yusuke Kajiwara +2 more
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BarekengIncreasing life expectancy has resulted in a growing elderly population, making neurodegenerative conditions such as dementia a major global health issue.
Hani Rubiani +4 more
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A VA-RSSI Localization Algorithm Based on Virtual Anchor Nodes in WSN
工程科学与技术, 2013 :To solve the problem of low precision in traditional RSSI location estimation schemes in WSN，the virtual anchor RSSI（VA-RSSI）localization algorithm with RSSI valid threshold was presented.
朱敏 +4 more
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