AoA-Based Positioning for Aerial Intelligent Reflecting Surface-Aided Wireless Communications: An Angle-Domain Approach

2022 ◽  
pp. 1-1
Author(s):  
Tao Zhou ◽  
Kui Xu ◽  
Zhexian Shen ◽  
Wei Xie ◽  
Dongmei Zhang ◽  
...  
Keyword(s):  
Wireless Communications ◽  
Reflecting Surface

scholarly journals Intelligent Reflecting Surface (IRS)-Aided Covert Wireless Communications with Delay Constraint

2021 ◽  
pp. 1-1
Author(s):  
Xiaobo Zhou ◽  
Shihao Yan ◽  
Qingqing Wu ◽  
Feng Shu ◽  
Derrick Wing Kwan Ng
Keyword(s):  
Wireless Communications ◽  
Delay Constraint ◽  
Reflecting Surface

scholarly journals Artificial-Noise-Aided Secure MIMO Wireless Communications via Intelligent Reflecting Surface

2020 ◽  
Vol 68 (12) ◽  
pp. 7851-7866 ◽  
Author(s):  
Sheng Hong ◽  
Cunhua Pan ◽  
Hong Ren ◽  
Kezhi Wang ◽  
Arumugam Nallanathan
Keyword(s):  
Wireless Communications ◽  
Artificial Noise ◽  
Reflecting Surface

scholarly journals Aerial Intelligent Reflecting Surface Enabled Terahertz Covert Communications in Beyond-5G Internet of Things

2021 ◽  
Author(s):  
Milad Tatar Mamaghani ◽  
Yi Hong
Keyword(s):  
Wireless Communications ◽  
Internet Of Things ◽  
Optimization Problem ◽  
Data Dissemination ◽  
Performance Enhancement ◽  
Average Energy ◽  
Access Point ◽  
Artificial Noise ◽  
User Scheduling ◽  
Reflecting Surface

<div>Unmanned aerial vehicles (UAVs) are envisioned to be extensively employed for assisting wireless communications in Internet of Things (IoT). </div><div>On the other hand, terahertz (THz) enabled intelligent reflecting surface (IRS) is expected to be one of the core enabling technologies for forthcoming beyond-5G wireless communications that promise a broad range of data-demand applications. In this paper, we propose a UAV-mounted IRS (UIRS) communication system over THz bands for confidential data dissemination from an access point (AP) towards multiple ground user equipments (UEs) in IoT networks. Specifically, the AP intends to send data to the scheduled UE, while unscheduled UEs may behave as potential adversaries. To protect information messages and the privacy of the scheduled UE, we aim to devise an energy-efficient multi-UAV covert communication scheme, where the UIRS is for reliable data transmissions, and an extra UAV is utilized as a cooperative jammer generating artificial noise (AN) to degrade unscheduled UEs detection, improving communication covertness.</div><div>This poses a novel max-min optimization problem in terms of minimum average energy efficiency (mAEE), targetting to improve covert throughput and reduce UAVs' propulsion energy consumption subject to some practical constraints such as covertness which is determined analytically. Since the optimization problem is non-convex, we tackle it via the block successive convex approximation (BSCA) approach to iteratively solve a sequence of approximated convex sub-problems, designing the binary user scheduling, AP's power allocation, maximum AN jamming power, IRS beamforming, and both UAVs' trajectory and velocity planning. Finally, we present a low-complex overall algorithm for system performance enhancement with complexity and convergence analysis. Numerical results are provided to verify our analysis and demonstrate significant outperformance of our design over other existing benchmark schemes.</div>

scholarly journals Intelligent Reflecting Surface Assisted Secure Wireless Communications With Multiple- Transmit and Multiple-Receive Antennas

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 86659-86673 ◽  
Author(s):  
Weiheng Jiang ◽  
Yu Zhang ◽  
Jinsong Wu ◽  
Wenjiang Feng ◽  
Yi Jin
Keyword(s):  
Wireless Communications ◽  
Multiple Transmit ◽  
Reflecting Surface
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