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Article
Computer Science, Information Systems
Hong Ren et al.
Summary: This article proposes to improve the energy efficiency of UAV-enabled WPT systems with multiple ground sensors by utilizing reconfigurable intelligent surface (RIS). Through optimizing the trajectory, hovering time, and reflection coefficients, the total energy consumption of the UAV is minimized while meeting the energy requirement of each sensor. Simulation results demonstrate the effectiveness of the proposed algorithm and the benefits of RIS in energy saving.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Telecommunications
Minh Dat Nguyen et al.
Summary: In this paper, we propose a UAV-based wireless network with intelligent reflecting surface (IRS) to optimize the placement of UAV, phase shifts of IRS, and sub-channel assignments, aiming to maximize the sum rate achieved by ground users (GUs) under the wireless backhaul capacity constraint. We derive the closed-form solution for IRS phase shifts and use the alternating optimization method for sub-channel assignment and UAV placement. The proposed design effectively balances bandwidth allocation for wireless access and backhaul links while maintaining the backhaul capacity constraint.
IEEE COMMUNICATIONS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Jian Chen et al.
Summary: This article proposes a novel intelligent reconfigurable surface (IRS) assisted coordinated multi-point (CoMP) system, aiming to maximize the energy efficiency (EE) of the system by jointly optimizing multiple parameters and satisfying users' quality of service requirements. Both ideal and non-ideal IRS are considered, and the problem is decomposed into several sub-problems for optimization. Various optimization methods are employed to solve the sub-problems, and a genetic algorithm (GA) is proposed for assistance. Numerical results demonstrate the feasibility, fast convergence, and flexibility of the proposed algorithm, showing superior performance compared to systems without IRS and with randomly initialized IRS.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Xiaobo Zhou et al.
Summary: This paper examines the performance gain achieved by deploying an intelligent reflecting surface (IRS) in covert communications. By jointly designing the transmit power and the IRS reflection coefficients, considering both global channel state information (CSI) and without a warden's instantaneous CSI, we demonstrate that perfect covertness is achievable with the aid of the IRS even for a single-antenna transmitter. We propose a penalty successive convex approximation (PSCA) algorithm and a low-complexity two-stage algorithm to tackle the design problem. The results show that significant performance gain can be achieved by deploying an IRS into covert communications.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Chang Liu et al.
Summary: Channel estimation is a critical task in IRS-MUC systems, and this paper proposes a deep residual learning approach to address the challenges of cascaded channel with a sophisticated statistical distribution. By modeling the channel estimation as a denoising problem, a convolutional neural network based on deep residual learning is designed to recover the channel coefficients. The proposed method achieves similar performance as the optimal MMSE estimator, but without the requirement of prior probability density function of channel.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2022)
Article
Computer Science, Information Systems
Zhenyu Kang et al.
Summary: This letter investigates an intelligent reflecting surface (IRS)-aided wireless relaying system and analyzes the capacity scaling orders under different IRS deployment strategies. The results show that deploying a single IRS near the relay achieves the highest capacity, while a cooperative IRS passive beamforming design achieves a larger capacity scaling order than the single-IRS deployment when the number of IRS reflecting elements M is sufficiently large.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Xiaoqi Zhang et al.
Summary: This paper focuses on an IRS empowered UAV downlink communication network, using block coordinate descent (BCD) method to maximize the sum-rate of all users. The proposed problem is converted and optimized using approximate linear method and Iterative Rank Minimization (IRM) for UAV transmit power and IRS phase shift. An enhanced reinforcement learning-based UAV trajectory optimization method is also proposed.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2022)
Article
Computer Science, Information Systems
Milad Tatar Mamaghani et al.
Summary: In this article, a UAV-mounted IRS communication system over THz bands is proposed for confidential data dissemination in IoT networks. By utilizing IRS for reliable data transmissions and extra UAV for jamming, the communication covertness and energy efficiency can be improved.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Computer Science, Hardware & Architecture
Xinying Chen et al.
Summary: This article discusses the use of covert communication as a wireless technique to hide confidential information and proposes the use of unmanned aerial vehicles (UAVs) as relays to improve the quality of service in covert wireless networks. The article introduces several typical application scenarios and presents two scenarios where UAVs serve as relays. The effectiveness and superiority of the proposed schemes are evaluated through simulation results, and future challenges are discussed.
Article
Telecommunications
Hehao Niu et al.
Summary: This study explores the use of STAR-RIS technology to enhance security in MISO networks by maximizing the weighted sum secrecy rate through ES, MS, and TS schemes. Different solution methods are proposed and the effectiveness of STAR-RIS is validated through simulation results.
IEEE COMMUNICATIONS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Shihao Yan et al.
Summary: This paper explores the optimization of the flying location and wireless communication power for UAV conducting covert operations, presenting practical solutions for achieving a balance between communication quality and covert transmission to a legitimate receiver. Various constraint combinations are considered, with explicit solutions provided for some, and the determination of feasible flight regions for others, ultimately demonstrating significant gains in achieving optimal UAV placement.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Xinying Chen et al.
Summary: This study proposes a covert communication scheme utilizing UAV relay to enhance transmission efficiency and counteract surveillance. By optimizing the position of the warden and the method of signal transmission, the covertness is improved and the transmission rate is maximized.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Xiaobo Zhou et al.
Summary: This work explores the optimization of UAV's 3D placement and transmit power for covert communications to maximize covertness and ensure communication quality. The study finds that the optimal horizontal position should be on the line connecting the legitimate receiver and the warden, with the optimal height being the minimum flying altitude, and derives closed-form expressions for optimal 3D location and transmit power considering finite blocklength coding. The numerical results demonstrate that the developed optimal design outperforms 2D UAV deployment, particularly when the warden is near the receiver, and shows that communication covertness does not always improve with an increase in channel uses for a given communication quality requirement.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Xinying Chen et al.
Summary: In this paper, a UAV-aided covert communication scheme assisted by a multi-antenna jammer is proposed to maximize the transmission rate between a ground transmitter and a UAV receiver. The scheme aims to disturb monitoring at wardens without interfering with legitimate transmission. Analysis of detection performance and optimization of thresholds for wardens are conducted to minimize detection outage probability.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Computer Science, Hardware & Architecture
Bodong Shang et al.
Summary: This study introduces the use of a UAV swarm-enabled reconfigurable intelligent surface (SARIS), which has advantages over traditional terrestrial and aerial RIS and offers new applications in wireless networks, but faces design challenges that need to be addressed.
IEEE WIRELESS COMMUNICATIONS
(2021)
Article
Computer Science, Hardware & Architecture
Xiaowei Pang et al.
Summary: This article introduces the method of using Intelligent Reflecting Surface (IRS) to enhance the performance of UAV-aided air-ground networks, and studies the joint optimization of UAV and IRS as well as two different case studies. Simulation results demonstrate the performance enhancement resulting from combining UAV and IRS in air-ground networks.
IEEE WIRELESS COMMUNICATIONS
(2021)
Article
Computer Science, Information Systems
Xiaowei Pang et al.
Summary: This paper combines NOMA and millimeter-wave technologies in UAV networks to maximize energy efficiency. The optimization problem is decomposed into sub-problems and solved using approximation, user clustering, and iterative algorithms. Simulation results are provided to evaluate the proposed schemes' performance.
SCIENCE CHINA-INFORMATION SCIENCES
(2021)
Article
Computer Science, Information Systems
Sisai Fang et al.
Summary: This paper proposes a novel secure intelligent reflecting surface (IRS)-assisted unmanned aerial vehicle (UAV) system to maximize secrecy rate by jointly designing trajectory, power control of UAV, and phase shifters of IRS. Due to the non-convex and intractable nature of the problem, an iterative algorithm based on successive convex approximation (SCA) is proposed to solve it. Simulation results validate the effectiveness of the algorithm and demonstrate a significant improvement in secrecy rate with the assistance of IRS.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2021)
Article
Telecommunications
Zehui Xiong et al.
Summary: This paper proposes a Markov decision process (MDP) model to optimize energy and data transfer for UAV-assisted communication in massive machine type communication (mMTC). The MDP model is solved by value iteration algorithm to obtain optimal strategies for the UAV, and further extended to address uncertainties, partially observable states, and large state space. Simulation results demonstrate that the MDP model with deep reinforcement learning (DRL) can achieve better wireless energy and data transfer strategies compared to baseline schemes.
IEEE TRANSACTIONS ON COGNITIVE COMMUNICATIONS AND NETWORKING
(2021)
Article
Computer Science, Information Systems
Wen Wang et al.
Summary: This letter investigates the secrecy performance of an intelligent reflecting surface (IRS)-aided unmanned aerial vehicle (UAV) relay communication system in the presence of multiple ground eavesdroppers. The distribution of Eves is modeled with stochastic geometry theory and estimation errors are considered to provide novel expressions for the statistical characterizations of the signal-to-noise ratio for both legitimate receiver and Eves. The impact of the number of reflecting elements and the location of UAV on secrecy outage probability (SOP) performance is evaluated through analytical methods, with numerical results supporting the theoretical analysis.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Jiangbo Si et al.
Summary: The study focuses on covert transmission in an intelligent reflecting surface (IRS) aided communication system, optimizing transmission power and phase shift to maximize covert transmission rate. Various algorithms are proposed to solve the optimization problem and simulations are performed to verify the results. The numerical results indicate that IRS can degrade the covert transmission rate when the warden is closer to the IRS than the intended receiver.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2021)
Article
Computer Science, Information Systems
Xingbo Lu et al.
Summary: This work focuses on maximizing the timeliness of data collection in UAV-aided IoT networks under a covertness constraint. By deriving analytical expressions for covertness constraint and Age of Information, and optimizing the UAV's transmit power for WPT, WPT duration, and data transmission duration, the study reveals trade-offs between timeliness and covertness in data collection. The numerical results demonstrate the impact of different scenarios on the optimal strategies for data transmission.
IEEE INTERNET OF THINGS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Qingqing Wu et al.
IEEE COMMUNICATIONS MAGAZINE
(2020)
Article
Engineering, Electrical & Electronic
Hui-Ming Wang et al.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2020)
Article
Engineering, Electrical & Electronic
Peiming Li et al.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2020)
Article
Engineering, Electrical & Electronic
Dongfang Xu et al.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2020)
Article
Computer Science, Information Systems
Yupeng Li et al.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2020)
Article
Computer Science, Information Systems
Sixian Li et al.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2020)
Article
Computer Science, Hardware & Architecture
Yong Zeng et al.
IEEE WIRELESS COMMUNICATIONS
(2019)
Article
Telecommunications
Jingyu Xiong et al.
IEEE COMMUNICATIONS LETTERS
(2019)
Article
Computer Science, Hardware & Architecture
Nan Zhao et al.
IEEE WIRELESS COMMUNICATIONS
(2019)
Article
Engineering, Electrical & Electronic
Xiaobo Zhou et al.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2019)
Article
Engineering, Electrical & Electronic
Xiaobo Zhou et al.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2019)
Article
Computer Science, Information Systems
Mohammad Mozaffari et al.
IEEE COMMUNICATIONS SURVEYS AND TUTORIALS
(2019)
Article
Telecommunications
Biao He et al.
IEEE COMMUNICATIONS LETTERS
(2017)
Article
Engineering, Electrical & Electronic
Yong Zeng et al.
IEEE COMMUNICATIONS MAGAZINE
(2016)
Article
Engineering, Electrical & Electronic
Boulat A. Bash et al.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2013)
