Results 61 to 70 of about 75,084 (278)

Research on Energy Efficiency of Wireless Powered Communication Network in Cognitive Radio Environment [PDF]

Jisuanji gongcheng, 2019
In order to improve the energy efficiency of Wireless Powered Communication Network(WPCN),a multiple signal source acquisition model in cognitive radio environment is established.Because the model optimization problem is a non-convex problem,it is ...
FENG Gang,QIN Xizhong,JIA Zhenhong,NIU Hongmei,WANG Zhehui
doaj   +1 more source

Slotted ALOHA for Wireless Powered Communication Networks

IEEE Access, 2018
Centralized controls in wireless-powered communication networks (WPCNs) induce considerable overhead for channel estimation and high complexity for optimization, as the number of wireless devices (WDs) increases. To tackle this problem, we apply slotted ALOHA protocol to WPCNs and design a slotted ALOHA-based energy-harvesting medium access control ...
Hyun-Ho Choi, Wonjae Shin
openaire   +2 more sources

Asynchronous Ad Hoc Networks With Wireless Powered Cognitive Communications [PDF]

IEEE Transactions on Cognitive Communications and Networking, 2019
IEEE Transactions on Cognitive Communications and Networking (accepted for publication)
Demarchou, Eleni, Psomas, Constantinos, Krikidis, Ioannis, Demarchou, Eleni, Psomas, Constantinos, Krikidis, Ioannis   +5 more
openaire   +3 more sources

Smart Face Masks as Wearable Respiratory Sensors: A Review of Sensor Technologies, Materials, and Future Directions

Advanced Healthcare Materials, EarlyView.
This review highlights recent advances in smart face masks that actively monitor breathing. By integrating humidity, gas, temperature, pressure, strain, and triboelectric sensors, these masks track key respiratory parameters in real time. The article summarizes sensor mechanisms, compares performance across studies, and discusses challenges and future ...
Negin Faramarzi, Naseeh Backer Kannanthodi, Alice Nicole Casling, Babar Ali, Samira Lakouraj Mansouri, Alessandro Giuseppe D'aloia, Hossein Cheraghi Bidsorkhi, Maria Sabrina Sarto   +7 more
wiley   +1 more source

Powering the future: A survey of ambient RF‐based communication systems for next‐gen wireless networks

IET Wireless Sensor Systems
Emerging wireless communication networks, exemplified by the evolution from 5G to subsequent technologies, necessitate extensive connectivity among myriad devices to fuel the ongoing technological progress.
Shweta Singh, Manish Kumar, Rahul Kumar
doaj   +1 more source

Bluetooth Communication Leveraging Ultra-Low Power Radio Design

Journal of Sensor and Actuator Networks, 2021
Energy-efficient wireless connectivity plays an important role in scaling both battery-less and battery-powered Internet-of-Things (IoT) devices. The power consumption in these devices is dominated by the wireless transceivers which limit the battery’s ...
Omar Abdelatty, Xing Chen, Abdullah Alghaihab, David Wentzloff   +3 more
doaj   +1 more source

Secure two-way communication via a wireless powered untrusted relay and friendly jammer

, 2017
In this paper, we propose a self-dependent two-way secure communication where two sources exchange confidential messages via a wireless powered untrusted amplify-and-forward (AF) relay and friendly jammer (FJ).
Kuhestani, Ali, Mamaghani, Milad Tatar, Mohammadi, Abbas, Yeoh, Phee Lep   +3 more
core   +1 more source

Epidermal Patch Technologies for Integrated Healthcare and Infection Management

Advanced Healthcare Materials, EarlyView.
Epidermal patches have evolved from simple wound coverings into multifunctional, skin‐conformable platforms integrating drug delivery, biosensing, and therapeutic functionalities. This review highlights their material innovations, fabrication strategies, and intelligent designs, including hydrogels, microneedles, and flexible electronics, while ...
Yuqi Wang, Atakan Tevlek, Pawel L. Urban, Boaz Mizrahi, Onome Ejeromedoghene, Roshan Deen, Yuanjing Lin, Jagan Mohan Dodda   +7 more
wiley   +1 more source

Optimal Time Scheduling for Wireless-Powered Backscatter Communication Networks [PDF]

IEEE Wireless Communications Letters, 2018
This letter introduces a novel wireless-powered backscatter communication system which allows sensors to utilize RF signals transmitted from a dedicated RF energy source to transmit data. In the proposed system, when the RF energy source transmits RF signals, the sensors are able to backscatter the RF signals to transmit date to the gateway and/or ...
Nguyen Van Huynh, Dinh Thai Hoang, Dusit Niyato, Ping Wang, Dong In Kim   +4 more
openaire   +3 more sources

Fully Wireless and Flexible Valves for Multiplexed and Prolonged Intravesical Liquid Release

Advanced Healthcare Materials, EarlyView.
A fundamental mechanism for the simultaneous control of multiple magnetic valves is reported in a miniature soft robotic patch for intravesical drug delivery, enabling fully wireless and programmable liquid release. Integrated with a bioadhesive interface and induction‐coupling‐based liquid volume sensing, the soft robotic patch is promising to enable ...
Boyang Xiao, Yi Zhu, Yusheng Wang, Janene M. Pierce, Jeffrey J. Tosoian, Xiaoguang Dong   +5 more
wiley   +1 more source