A5080914749- Advanced Wireless Communication Technologies
- Satellite Communication Systems
- IoT Networks and Protocols
- Semiconductor Lasers and Optical Devices
- Optical Network Technologies
- Optical Wireless Communication Technologies
- UAV Applications and Optimization
- Wireless Communication Security Techniques
- Remote Sensing and LiDAR Applications
- Fault Detection and Control Systems
- Adaptive Control of Nonlinear Systems
- Cooperative Communication and Network Coding
- Infrared Target Detection Methodologies
- Lipid Membrane Structure and Behavior
- Color Science and Applications
- Dyeing and Modifying Textile Fibers
- Satellite Image Processing and Photogrammetry
- Optical Systems and Laser Technology
- Spacecraft Design and Technology
- Machine Learning and ELM
- Guidance and Control Systems
- Ion Channels and Receptors
- Advanced Photonic Communication Systems
- Robotics and Sensor-Based Localization
- Sphingolipid Metabolism and Signaling
Nanchang University
2025
Beijing University of Posts and Telecommunications
2020-2024
Huaqiao University
2022
Peking University
2018
Beihang University
2018
Due to the air-to-ground line-of-sight communication links, it is challenging deal with security threats in wireless system unmanned aerial vehicles (UAVs) integrated. In a UAV-enabled mobile relay system, paper proposes novel cooperative scheme from physical layer perspective address issue. Specifically, where UAV employed forward confidential information between two ground users, an eavesdropper exists on wiretapping UAV. To enhance performance of we introduce friendly jammer transmitting...
Unmanned aerial vehicle (UAV) relay can effectively improve the coverage and performance of land communications, which makes it prospective to be deployed in various applications. However, there exist some practical challenges we have face UAV-enabled communication system designing, such as secrecy wiretapping threats due air-to-ground line-of-sight link, energy consumption issues because limitation energy-constraint. To deal with these two key issues, develop a novel UAV swarm assisted...
Low Earth orbit (LEO) satellite communication (SatCom) systems have emerged as a key enabler to provide ubiquitous connectivity in the upcoming generation networks. Yet conflict between power-limited link budget and long-distance path loss restricts universal application of LEO SatCom. Fortunately, reconfigurable intelligent surface (RIS) technique can be an efficient solution address this issue. In paper, we incorporate RIS into SatCom system enhance its downlink transmission by introducing...
Polarizer is a key component of the liquid crystal display panel, and optical properties mainly include transmittance, degree polarization chromaticity. made multilayer film, in which PVA polarizing film core structure for realizing whole polarizer. commonly manufactured through multi-step craft, including rinsing, dyeing, stretching correcting. The correction process has significant impact on final apparent color In this study, KI concentration correcting tank, ranging from 1% to 3%, was...
Multiple-input multiple-output (MIMO) techniques can enhance channel capacity by enabling spatial multiplexing for satellite communication (SATCOM) systems. In this paper, we consider the MIMO SATCOM in a co-located dual system, where large spacing between ground antennas is demanded to avoid loss caused strong correlation. To break through inherent limitation, introduce reconfigurable intelligent surface (RIS), two-dimension passive electromagnetic array, as supplementary device into...
Reconfigurable intelligent surfaces enhance wireless systems by reshaping propagation environments. However, dynamic metasurfaces (MSs) with numerous phase-shift elements incur undesired control and hardware costs. In contrast, static MSs (SMSs), configured phase shifts pre-designed for specific communication demands, offer a cost-effective alternative eliminating element-wise tuning. Nevertheless, SMSs typically support single beam pattern limited flexibility. this paper, we propose novel...
Sensor faults diagnosis is an important research field of the Hypersonic Vehicle (HV). A fast and effective fault method can reduce probability flight accidents improve reliability vehicle. Aiming at uncertainty HV model rapidity diagnosis, wavelet packet decomposition integrated with Biogeography Based Optimization Kernel Extreme Learning Machine (BBO-KELM) proposed for first time to identify fault. And (BBO) used performance KELM firstly. The time-frequency analysis capability high...
Full frequency reuse combined with precoding is a promising solution for multibeam satellite systems (MSSs) to meet the evergrowing capacity demand. However, line-of-sight-dominant satellite-ground channels will cause severe channel correlation among geographically clustered hotspot users (HUs), which restricts multiuser over HUs. In this paper, we propose reconfigurable intelligent surface (RIS)-aided enhancement scheme MSSs. We formulate sum rate maximization problem SINR constraints added...
Precoding techniques combined with aggressive full frequency reuse (FFR) are a promising solution to meet the evergrowing capacity demand for multibeam satellite systems (MSSs). However, LOS-dominant satellite-ground propagation environments will cause strong channel correlation among geographically clustered hotspot users (HUs), and consequent degradation of spatial multiplexing gain severely restricts multiuser multiple-input multiple-output (MU-MIMO) capacity. In this paper, we propose...
Low Earth Orbit (LEO) satellite communication (SatCom) is considered a promising solution to supplement terrestrial networks. However, line-of-sight (LoS) links between the and terminals are possibly blocked by objects on (e.g., mountains, tall buildings, etc.), leading interruptions. This paper introduces Reconfigurable Intelligent Surface (RIS) into LEO SatCom system extend coverage in blockage scenarios. Specifically, contrast signal transmission model under far-field assumption usual...
Three-dimensional (3D) city maps have many applications in a wide range of areas, however, the current 3D map reconstruction process is costly and labor-intensive. Some studies verified that using passive environment sensors for automatic mapping enables reduction cost human labor utilization, yet finite data collected by limit scope precision. Inspired rapid development bright prospect low earth orbit (LEO) satellite communication technology, we propose scheme based on signal-to-noise ratio...
The integration of satellite system into the fifth-generation (5G) access networks enables ubiquitous coverage for terrestrial networks. multicast capability is considered as an essential component in delivering multimedia content. However, improving resource utilization groups with multiple services has become urgent problem due to limited bandwidth satellite-to-ground links. To improve overall throughput transmission scenario, we propose a novel Resource Allocation Scheme among Multiple...
Although satellite backhauls facilitate expanding network coverage and providing capacity in unconnected areas, delivering high-quality videos via is challenging due to high delay, bandwidth limitations expenses. Super-resolution (SR) technique has been proposed integrate into streaming systems improve Quality of Experience (QoE) bandwidth-limited environments. However, existing SR-enhanced face two key challenges: 1) compatibility problem that legacy video servers user equipment (UEs) must...
For the coupled nonlinear dynamic characteristics of air defense missile maneuvering at large angle attack, use high order compensation feedback linearization control method for channel decoupling and parameter perturbation model, singular compensator is designed to solve problem caused by linearization, so as realize overload model missile. The simulation results show that controller in paper can effectively when occurs problems. response fluctuation does not exceed 3% time 0.25s under...