Article
Engineering, Multidisciplinary
Xiaoting Ren, Kefeng Guo
Summary: In this paper, the secrecy outage performance is investigated for the two-way integrated satellite unmanned aerial vehicle relay networks with hardware impairments. The closed-form expression for the secrecy outage probability is derived. Additionally, asymptotic analysis is conducted to evaluate the impact of system parameters and hardware impairments on the secrecy outage probability, providing a fast method for evaluation.
CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES
(2023)
Article
Telecommunications
Vinay Kumar Chapala, S. M. Zafaruddin
Summary: This study analyzes the performance of a RIS-empowered THz system under the combined effect of alpha-mu fading and pointing errors, providing specific statistical analysis. The results show that RIS can significantly improve the performance of THz communication and offer insights into mitigating pointing errors.
IEEE COMMUNICATIONS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Ali Refaai, Fatma Newagy, Mohamed Fathy Abo Sree, Moustafa H. Aly, Hadia Elhennawy, Mohamed Abaza
Summary: Optical space communication in the form of a relay satellite system using laser satellite communication (SatCom) is proposed to overcome the challenges of RF satellite communication. Channel turbulence, additional technologies, intensity modulation direct detection (IM/DD), decoding, and forwarding (DF) are employed to evaluate the efficacy of the proposed laser uplink satellite relay communication model in terms of outage probability (OP) and bit error rate (BER) indicators. The study analyzes the necessary channel properties and compares the findings with those of optical direct link to demonstrate the superiority of the proposed system. The investigation of system parameters reveals that the proposed system outperforms optical downlink SatCom, improving the required aperture radius by up to 10% and the overall system performance by up to 57%.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Abdulgani A. Ibrahim, Serdar Ozgur Ata, Lutfiye Durak-Ata
Summary: In this work, spatial diversity techniques are proposed to improve the performance of free-space optical (FSO) communication systems against atmospheric turbulence effects and pointing errors. The performance of FSO communication systems with Alamouti encoding scheme over Malaga turbulence channel is investigated. Analytical expressions for the average bit error rate (BER) and the outage probability (OP) are derived based on the probability distribution function (PDF) of end-to-end channel gain, and asymptotic expressions are also derived. The results highlight the gains in performance that can be achieved when Alamouti encoding scheme is employed in FSO communication systems.
IEEE PHOTONICS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Tang Hanling, Li Yongjun, Li Yi, Zhao Shanghong
Summary: This paper establishes a pointing error model that includes axis and jitter errors based on the unmanned aerial vehicle (UAV) platform and flight environment. It examines the effect of turbulence and pointing errors on the bit error rate of UAV laser communication using an atmospheric turbulence model. The results show that turbulence significantly affects the system's bit error rate, and the system performance is determined by the pointing error when it exceeds a certain threshold.
LASER & OPTOELECTRONICS PROGRESS
(2022)
Article
Telecommunications
Osamah S. Badarneh, Rawan Derbas, Fares S. Almehmadi, Faissal El Bouanani, Sami Muhaidat
Summary: In this letter, novel closed-form expressions for PDF and CDF of irradiance fluctuations in the presence of pointing error impairments are derived. The derived PDF and CDF of SNR are used to obtain expressions for the outage probability, average bit error rate, and average ergodic capacity. Simple and accurate asymptotic expressions are also derived to gain insight into the impact of system and turbulence channel parameters. The analytical results are supported by Monte-Carlo simulations for validation.
IEEE COMMUNICATIONS LETTERS
(2021)
Article
Engineering, Aerospace
Wensheng Lin, Lixin Li, Yun Liu, Yixuan He, Ying Liu
Summary: This paper proposes an analytical framework for evaluating the timeliness performance of the IoT system based on UAV lossy communications. The framework includes outage probability analysis and Age-of-Information (AoI) analysis. The outage probability is derived based on Shannon's lossy source-channel separation theorem. The Peak AoI (PAoI) is minimized by determining the optimal rate for generating information.
CHINESE JOURNAL OF AERONAUTICS
(2023)
Article
Computer Science, Information Systems
Xiaozhen Lu, Jingfang Jie, Zihan Lin, Liang Xiao, Jin Li, Yanyong Zhang
Summary: This paper proposes a robot relay scheme for UAVs against smart jamming. The scheme combines reinforcement learning with a function approximation approach to optimize the robot's movement and relay power. Simulation results show that the proposed scheme outperforms existing schemes.
SCIENCE CHINA-INFORMATION SCIENCES
(2022)
Article
Engineering, Electrical & Electronic
Vinod Kiran Kappala, Jayashree Pradhan, Natasha Pawar, Ashok Kumar Turuk, Sudhan Majhi, Santos Kumar Das
Summary: This paper considers a generalized distribution of pointing error and proposes an auto-tracking mechanism to mitigate the impact of atmospheric turbulence and pointing errors on FSO communication. Experimental results demonstrate that this method can effectively reduce the influence of pointing error and jitter on FSO communication.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Yuwei Jiang, Yueheng Li, Xinwen Zhang, Meiyan Ju, Ping Huang
Summary: This paper investigates the outage performance of serial and parallel relay-assisted underwater wireless optical communication (UWOC) systems using a newly proposed aggregated underwater fading model. A generalized gamma distribution (GGD) is chosen to accurately characterize weak oceanic turbulence, overcoming the limitations of traditional underwater weak turbulence models. The authors establish a new receiving signal model that integrates various factors affecting the signal, and provide analytical expressions for the outage probabilities of different UWOC systems based on the proposed model.
PHYSICAL COMMUNICATION
(2023)
Article
Computer Science, Hardware & Architecture
Wei Jian Lau, Joanne Mun-Yee Lim, Chun Yong Chong, Nee Shen Ho, Thomas Wei Min Ooi
Summary: This paper analyzes the performance of a UAV swarm network by characterizing the effects of UAV-to-UAV interference in terms of SINR. The model considers both deterministic and stochastic channel processes and incorporates hybrid LoS channels. The effects of network parameters on various KPIs are studied, and the model is used to evaluate the temporal evolutions of network outage probability given the UAV trajectories. The main advantage of the model is its ability to analyze the baseline outage probabilities of multi-UAV deployments.
Article
Engineering, Civil
Neelima Agrawal, Ankur Bansal, Keshav Singh, Chih-Peng Li
Summary: Reconfigurable intelligent surface (RIS) is a crucial transmission technology in the next-generation wireless communication network, with applications in IoT and vehicular communication systems. This paper investigates the application of RIS in UAV-enabled vehicular communication system, analyzing the system performance and showing that RIS deployment significantly improves performance.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Anu Goel, Richa Bhatia
Summary: This paper investigates mixed RF/FSO decode and forward two-way relaying with consideration of hardware impairments and interference. A double relay selection scheme is employed to combat these effects. The fading characteristics of the RF and CCI links are modeled using the Rayleigh distribution, while atmospheric turbulence on the FSO link follows the Malaga irradiance model. The outage probability is analyzed and a closed-form expression is derived using the Meijer-G function. The impact of various factors on communication channel reliability, such as node availability, optical demodulation, turbulence, pointing error, interference, and hardware impairment, is confirmed through analytical results and Monte-Carlo simulations.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Pouya Agheli, Hamzeh Beyranvand, Mohammad Javad Emadi
Summary: This paper investigates a triple-hop UWSN system using AUV and UAV relays for end-to-end communication, with different technology links deployed, and proposes two FSO transmission scenarios. The results show that the RRS scheme outperforms the DTS scheme in both uplink and downlink transmissions, and the tracking procedure significantly improves channel alignment.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Computer Science, Information Systems
Wentao Wang, Xianglin Wei, Yingchao Jia, Ming Chen
Summary: Flying ad hoc networks composed of Unmanned Aerial Vehicles (UAVs) have attracted significant attention due to their flexibility, affordability, and quick deployment. However, maintaining multi-hop communication links between UAVs is challenging due to their high mobility. This paper proposes a UAV deployment algorithm based on Q-learning to construct a UAV relay network with minimal nodes, along with an Equidistant Node Control algorithm for dynamic relay paths. Experimental results on the OMNeT++ simulation platform demonstrate that the proposed algorithm achieves a lower cost and reliable communication performance for the UAV relay network.
Article
Engineering, Electrical & Electronic
Huanran Li, Shaohua Wu, Jian Jiao, Xiao-Hui Lin, Ning Zhang, Qinyu Zhang
Summary: This paper investigates the autonomous detecting and tracking of UAVs in the maritime environment. It proposes offloading the computation-intensive task to an edge computing server to reduce latency and energy consumption. The impact of video frame resolution on task size, detection accuracy, latency, and energy consumption is examined. Optimization techniques are applied to mitigate the complexity and obtain a low complexity offloading algorithm with good performance.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Lingyan Zhang, Shaohua Wu, Tingting Zhang, Qinyu Zhang
Summary: WiFi fingerprint-based localization is a promising technology for ubiquitous location-based services. However, the challenges of site survey and vulnerable environment changes hinder its wide spread applications. In this study, we propose a novel approach called LESS, which uses adaptive fingerprint-based localization with less site survey. By exploring a new paradigm of radio map construction and adaptation with few-shot relation learning, LESS achieves a balance between system overhead and location performance, making it superior to other methods in dynamic indoor environments.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2023)
Article
Computer Science, Information Systems
Qifan Hu, Jian Jiao, Ye Wang, Shaohua Wu, Rongxing Lu, Qinyu Zhang
Summary: In this article, a multitype services coexistence handover (MSCH) nonorthogonal multiple access (NOMA) scheme for a dual-layer mega LEO satellite constellation is proposed. The scheme can simultaneously and efficiently provide uplink NOMA for three types of fifth-generation user equipments (UEs). Several NOMA algorithms are designed based on the closed-form expressions of three key performance indicators.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Computer Science, Information Systems
Shushi Gu, Zichao Yu, Qinyu Zhang, Tao Huang
Summary: With the rapid development of future networks, the desire for low-energy system design and transmission strategy becomes more compelling. This letter investigates the energy consumption issue of hierarchical cooperative caching networks (HCCNs) and proposes a three-stage coded transmission strategy. A total energy consumption minimization problem is formulated with cache size constraints, and an algorithm is provided to obtain the optimal cache placement matrix. Numerical results demonstrate the effectiveness of the optimized three-stage coded transmission strategy in reducing energy consumption compared to various multicast transmission strategies under different users' cache sizes.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2023)
Article
Computer Science, Information Systems
Yue Li, Yunlai Xu, Qinyu Zhang, Zhihua Yang
Summary: This article studies a possible solution for remote real-time data gathering using a low orbit satellite constellation as a relay network, where freshness information is forwarded through dynamic intersatellite links. By modeling a time-varying network, the article focuses on minimizing the Age of Information (AoI) in delivering data through a multihop path, particularly considering the effect of frequent interruptions of intersatellite links.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Computer Science, Information Systems
Minkai Zhang, Shaohua Wu, Jian Jiao, Ning Zhang, Qinyu Zhang
Summary: In this article, a networked control system (NCS) with network-induced delay is studied, where the control center controls a remote unmanned aerial vehicle (UAV) for trajectory tracking. The controlled UAV's sensor adopts an event-triggered mechanism, while the control center uses an adaptive dynamic programming (ADP) based tracking control method. Two transmission options are considered, control action or neural network model, and are optimized through a Markov decision process (MDP). A deep Q-network (DQN)-based strategy using reinforcement learning (RL) algorithm is proposed, along with a greedy strategy based on instantaneous expected cost calculation. Simulation results show that the DQN-based strategy performs better but requires training, while the greedy strategy is suboptimal but computationally easier. Moreover, the proposed strategies achieve a better compromise between energy consumption and tracking cost, and the proper transmission sequence in DQN-based strategy can reduce both tracking cost and transmission energy.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Computer Science, Information Systems
Yuhao Huang, Jian Jiao, Ye Wang, Shaohua Wu, Rongxing Lu, Qinyu Zhang
Summary: This article focuses on grant-free massive access setup and analyzes the Age of Information (AoI) in this scenario. A novel graph-based spatially coupled irregular repetition slotted ALOHA (G-SC-IRSA) random access protocol is proposed to improve packet loss rate (PLR) and AoI performance. The article presents theoretical derivations, system load threshold evaluation, and optimal parameter selection for G-SC-IRSA. Simulation results validate the effectiveness of the proposed protocol in achieving minimum AAoI and outperforming existing benchmark schemes.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Jian Jiao, Hui Hong, Ye Wang, Shaohua Wu, Rongxing Lu, Qinyu Zhang
Summary: In this paper, a satellite-based Internet of Things (S-IoT) scheme is proposed to provide timely updates to terrestrial user equipments (UEs) via non-orthogonal multiple access (NOMA). The system aims to minimize the long-term age of information (AoI) under power and stability constraints, and achieve optimized power allocation using the ListNet algorithm and particle swarm optimization algorithm. Simulation results demonstrate the effectiveness of the proposed scheme in achieving low weighted sum AoI compared to benchmark schemes.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Zhigang Rao, Jian Jiao, Ye Wang, Shaohua Wu, Rongxing Lu, Qinyu Zhang
Summary: In this paper, we propose an LT-collision resolution GFRA (LT-GFRA) scheme for massive access in IoT. Our scheme combines a pilot set and a T-order codebook to allow multiple UEs to access the base station simultaneously. We design a SCJD decoder that can decode at most T UEs from the same pilot and recover up to LT UEs. We analyze the decoding error probability, access failure probability, and system throughput in different fading channels.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2023)
Article
Automation & Control Systems
Yifei Qiu, Shaohua Wu, Jian Jiao, Ning Zhang, Qinyu Zhang
Summary: This article addresses the problem of model-free remote control in a wireless networked cyber-physical system (CPS) consisting of spatially distributed sensors, controllers, and actuators. A deep deterministic policy gradient (DDPG) algorithm is used in the controller to achieve model-free control. The article incorporates historical action information as input and adopts a reward-based prioritized experience replay (PER) approach to improve control accuracy and convergence rate.
IEEE TRANSACTIONS ON CYBERNETICS
(2023)
Article
Computer Science, Information Systems
Jianhao Huang, Jian Jiao, Ye Wang, Shaohua Wu, Rongxing Lu, Qinyu Zhang
Summary: This paper proposes two schemes to achieve dual-hop timely status updates in Satellite Internet of Things (S-IoT). By utilizing long erasure coding and adjusting different modes, it can improve the transmission performance and age of information.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Telecommunications
Maozhe Xu, Guanjun Xu, Youran Dong, Weizhi Wang, Qinyu Zhang, Zhaohui Song
Summary: In this paper, a UAV-assisted dual-hop FSO communication system is proposed, taking into account atmospheric absorption, pointing errors, atmospheric turbulence, and angle-of-arrival fluctuations. Closed-form expressions for the PDF and CDF of the proposed system are derived using the Meijer-G function, and analytical expressions for the outage probability, average bit error rate, and ergodic capacity are proposed using the extended generalized bivariate Fox's H function. The analytical results are validated and the influence of system and channel parameters on performance is analyzed.
CHINA COMMUNICATIONS
(2023)
Article
Engineering, Civil
Peiying Zhang, Ning Chen, Guanjun Xu, Neeraj Kumar, Ahmed Barnawi, Mohsen Guizani, Youxiang Duan, Keping Yu
Summary: With the maturity of 5G and ITS technologies, the limited lifetime and computing capability of mobile devices pose challenges to QoS. To address the efficiency and sustainability issues, this paper proposes a multi-target-aware dynamic resource scheduling algorithm and utilizes deep reinforcement learning to interact with the MTCN environment effectively.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2023)
Article
Computer Science, Information Systems
Peiying Zhang, Chong Lv, Guanjun Xu, Haoyu Wang, Lizhuang Tan, Kostromitin Konstantin Igorevich
Summary: This paper discusses the challenges of large-scale low Earth orbit satellite networks (LSNs) and proposes a routing strategy based on a genetic algorithm to address these challenges. Experimental results demonstrate that the proposed strategy outperforms traditional algorithms in terms of performance.
