Results 41 to 50 of about 7,690,533 (126)
Transactions on Emerging Telecommunications Technologies, Volume 36, Issue 7, July 2025.We introduce a novel model of an IRS‐assisted MU‐MISO‐OFDMA system. We aim to jointly optimize beamforming vectors, IRS reflection coefficients, and OFDM subcarrier allocation to maximize the overall sum rate. ABSTRACT In this article, we propose a novel resource allocation strategy for multiuser multiple‐input single‐output orthogonal frequency ...
Binh‐Minh Vu, Oh‐Soon Shin
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Extending Wireless Powered Communication Networks for Future Internet of Things [PDF]
, 2017 Energy limitation has always been a major concern for long-term operation of wireless networks. With today's exponential growth of wireless technologies and the rapid movement towards the so-called Internet of Things (IoT), the need for a reliable ...
Ramezani, Parisa
core
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.
Hyun-Ho Choi, Wonjae Shin
doaj +1 more source
Energy efficiency maximization in IRS‐aided cooperative WPCN with non‐linear EH users
Electronics Letters, Volume 61, Issue 1, January/December 2025.The paper investigates energy efficiency maximization in intelligent reflecting surfaces aided wireless‐powered communication network with hybrid access point and non‐linear energy harvesting users. The focus is on maximizing energy efficiency at the hybrid access point by jointly optimizing transmit time allocation, power allocation at users, and ...
Bharti Katiyar +3 more
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Wireless Powered Communication Networks [PDF]
, 2017 The limited life time of batteries is a crucial issue in energy-constrained wireless communications. Recently, the radio frequency (RF) wireless energy transfer (WET) technique has been developed as a new practical method to extend the life time of ...
Gao, Zihao
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Trajectory design and transmission optimization for data freshness in UAVs‐assisted WPCNs
IET Communications, Volume 18, Issue 19, Page 1650-1663, December 2024.The long‐term average age of information (AoI) in an unmanned aerial vehicles (UAVs)‐assisted WPCN is investigated, where UAVs, fully charged by hybrid access points, fly to the hovering points of islands to charge sensor nodes and receive data from them, and fly back to offload the received data to the hybrid access points.
Xiaoying Liu +3 more
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IET Radar, Sonar &Navigation, Volume 18, Issue 9, Page 1481-1493, September 2024.The authors study the resource allocation problem of non‐orthogonal multiple access (NOMA) downlink in Internet of Things (IoT) environment combined with the Ambient Backscatter Communication (AmBC) and the reconfigurable intelligent surface (RIS). Aiming to maximise the system energy efficiency, and considering the power limitation, rate limitation ...
Ruiman Gao +4 more
wiley +1 more source
Thermoelectric energy harvesting for wireless self powered condition monitoring nodes [PDF]
, 2013 Condition monitoring of machines and structures is commonly utilized in order to prevent failures before they can occur. For these reasons, data such as temperature, vibrations or displacements are collected and analysed. Sensors collect this information,
Royo Perez, Sandra
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IET Signal Processing, Volume 2024, Issue 1, 2024.This paper investigates a backscatter communication (BackCom) based non‐orthogonal multiple access (NOMA) system in a multiple‐input and single‐output (MISO) scenario, where two decoding methods are deployed, including the sum‐capacity approach and QR decomposition.
Dingjia Lin +4 more
wiley +1 more source
Transmission policies in wireless powered communication networks with energy cooperation
, 2016 Energy Harvesting (EH) has been recognized as one of the most appealing solutions for extending the devices lifetime in wireless sensor networks. Despite the vast literature available about ambient EH, in the last few years Energy Transfer (ET) has been ...
Biason, Alessandro +3 more
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