Results 1 to 10 of about 44,844 (116)

Low Correlation Interference OFDM-NLFM Waveform Design for MIMO Radar Based on Alternating Optimization [PDF]

open access: yesSensors, 2021
The OFDM chirp signal is suitable for MIMO radar applications due to its large time-bandwidth product, constant time-domain, and almost constant frequency-domain modulus.
Tianqu Liu   +4 more
doaj   +2 more sources

Energy Efficiency Maximization for ME-IRS-Enabled Secure Communications [PDF]

open access: yesEntropy
This paper investigates the secrecy energy efficiency (SEE) maximization problem in a downlink multiple-input single-output (MISO) wireless communication system assisted by an intelligent reflecting surface with movable elements (ME-IRS).
Chenxi Liu   +3 more
doaj   +2 more sources

Resource Configuration for Throughput Maximization in UAV-WPCN With Intelligent Reflecting Surface

open access: yesIEEE Access, 2023
UAV-based wireless powered communication network is a promising method of power supply for battery-free IoT devices, but the limited wireless transmission capability of the UAV constrains the coverage area and transmission throughput.
Liang Xue   +5 more
doaj   +1 more source

Optimal SWIPT in RIS-Aided MIMO Networks

open access: yesIEEE Access, 2021
The use of simultaneous wireless information and power transfer (SWIPT) is a key enabler of achieving convenience and prolonging the energy supply lifetime of wireless networks.
Ziyi Yang, Yu Zhang
doaj   +1 more source

Aerial intelligent reflecting surface for secure wireless networks: Secrecy capacity and optimal trajectory strategy (invited paper)

open access: yesIntelligent and Converged Networks, 2022
This work investigates the potential of the aerial intelligent reflecting surface (AIRS) in secure communication, where an intelligent reflecting surface (IRS) carried by an unmanned aerial vehicle (UAV) is utilized to help the communication between the ...
Hehao Niu   +3 more
doaj   +1 more source

Achievable Rate Analysis and Max-Min SINR Optimization in Intelligent Reflecting Surface Assisted Cell-Free MIMO Uplink

open access: yesIEEE Open Journal of the Communications Society, 2022
In this paper, we study the uplink transmission in an intelligent reflecting surface (IRS) assisted cell-free multiple-input multiple-output (MIMO) system where the central processing unit (CPU) only has statistical channel state information (CSI) to ...
Qurrat-Ul-Ain Nadeem   +2 more
doaj   +1 more source

Joint Trajectory and Hybrid Beamforming Design for Multi Antenna UAV Enabled Network

open access: yesIEEE Access, 2021
In this paper, we investigate the transmission design in a multi antenna unmanned aerial vehicle (UAV)-enabled network, where the flight trajectory and hybrid digital and analog beamforming (BF) of the UAV are jointly designed, for both the fully ...
Feng Zhou, Rugang Wang
doaj   +1 more source

A Secure-Transmission Maximization Scheme for SWIPT Systems Assisted by an Intelligent Reflecting Surface and Deep Learning

open access: yesIEEE Access, 2022
Recently, the demand for spectral and energy efficiency has significantly been increased along with new breakthroughs in programmable meta-material techniques.
Huynh Thanh Thien   +2 more
doaj   +1 more source

Intelligent Reflecting Surface-Assisted Dual-Function Radar-Communication System

open access: yesIEEE Access, 2023
We consider the design of a Dual-Function Radar-Communication (DFRC) system, aided by an Intelligent Reflecting Surface (IRS). The radar precoding matrix and IRS parameters are optimized to maximize the weighted sum of the signal-to-noise ratio (SNR) at ...
Yi-Kai Li, Athina P. Petropulu
doaj   +1 more source

Joint beamforming design for distributed IRS assisted millimeter wave MU-MISO system

open access: yesTongxin xuebao, 2022
A joint beamforming design scheme for distributed intelligent reflecting surface (IRS) assisted multi-user communication was proposed to solve the reliable communication problem in the downlink of millimeter-wave multi user-multiple input single output ...
Zhongjie LI   +3 more
doaj  

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