Results 11 to 20 of about 277,741 (273)

Optimal deployment of large-scale wireless sensor networks based on graph clustering and matrix factorization

open access: yesEURASIP Journal on Advances in Signal Processing, 2023
It is undeniable that there are a large number of redundant nodes in a wireless sensor network. These redundant nodes cause a colossal waste of resources and seriously threaten the life of the sensor network.
Hefei Gao, Qianwen Zhu, Wei Wang
doaj   +1 more source

Analysis of Wireless Power Transmission

open access: yesCoRR, 2013
The advent of various wireless technologies have revolutionized the communication infrastructure and consequently changed the entire world into a global village. Use of wireless technology has also been made for transmission of electric power wirelessly.
Anzar Mahmood   +3 more
openaire   +2 more sources

An adaptive relay node selection algorithm based on opportunity

open access: yesEURASIP Journal on Wireless Communications and Networking, 2017
The collaborative relay network plays an important role in a smart grid application thanks to its high efficiency. However, energy and bandwidth management need to be further improved to extend network life cycle and reduce potential network segmentation.
Baoju Zhang   +4 more
doaj   +1 more source

Transmission Power Measurements for Wireless Sensor Nodes and their Relationship to the Battery Level [PDF]

open access: yes, 2005
In this work we focus on the new generation EYESIFXv2 [1] wireless sensor nodes by carrying out experimental measurements on power related quantities.
Bellettini, C.   +5 more
core   +2 more sources

Design and control of a bidirectional wireless charging system using GaN devices [PDF]

open access: yes, 2019
Most of the existing wireless power transfer system works in unidirectional with one-direction control signals. This paper presents a bidirectional wireless charging system with duplex communication method, which is not only able to achieve the two-way ...
Gu, Bowen   +4 more
core   +2 more sources

Antenna array design by a contraction adaptive particle swarm optimization algorithm

open access: yesEURASIP Journal on Wireless Communications and Networking, 2019
Massive multiple input multiple output (MIMO) has drawn intensive attention of researchers for solving huge data transmissions in the fifth generation wireless communication.
Xin Zhang   +3 more
doaj   +1 more source

Spectral Efficiency Improvement and Power Control Optimization of Massive MIMO Networks

open access: yesIEEE Access, 2021
Higher requirements must be put forward about wireless signal transmission in harsh environments. Energy loss mitigation, channel estimation, noise interference reduction demands high quality of service in wireless communication.
Xiu Zhang, Hao Qi, Xin Zhang, Liang Han
doaj   +1 more source

The Impact of QoS Constraints on the Energy Efficiency of Fixed-Rate Wireless Transmissions [PDF]

open access: yes, 2008
Transmission over wireless fading channels under quality of service (QoS) constraints is studied when only the receiver has channel side information. Being unaware of the channel conditions, transmitter is assumed to send the information at a fixed rate.
Gursoy, Mustafa Cenk   +2 more
core   +4 more sources

Investigation of a novel structure for 6PolSK-QPSK modulation

open access: yesEURASIP Journal on Wireless Communications and Networking, 2017
Benefiting from the high spectrum efficiency and power efficiency, 6PolSK-QPSK (6-ary polarization-shift keying quadrature phase-shift keying) is a promising modulation format in coherent optical communication.
Yupeng Li   +3 more
doaj   +1 more source

Research on robot wireless charging system based on constant-voltage and constant-current mode switching

open access: yesEnergy Reports, 2022
The traditional wired charging of robot has the disadvantages of inconvenient charging and manual operation for electrical connection. With the continuous development of radio power transmission, the disadvantages of wired charging are overcome, and the ...
Wenlan Gong   +5 more
doaj   +1 more source

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