A5037478980- Advanced Wireless Communication Technologies
- Wireless Communication Security Techniques
- Cooperative Communication and Network Coding
- IoT and Edge/Fog Computing
- Advanced MIMO Systems Optimization
- Optical Wireless Communication Technologies
- Energy Harvesting in Wireless Networks
- IoT Networks and Protocols
- Cognitive Radio Networks and Spectrum Sensing
- PAPR reduction in OFDM
- Reinforcement Learning in Robotics
- Topological Materials and Phenomena
- Antenna Design and Analysis
- Microwave Engineering and Waveguides
- Wireless Communication Networks Research
- Advanced Wireless Communication Techniques
- Satellite Communication Systems
- Full-Duplex Wireless Communications
- Cloud Computing and Resource Management
- Power Line Communications and Noise
- Advanced Wireless Network Optimization
- Age of Information Optimization
- Ocular Disorders and Treatments
- Millimeter-Wave Propagation and Modeling
- Wireless Signal Modulation Classification
Xidian University
2016-2025
Ningxia Water Conservancy
2023-2024
China Academy of Engineering Physics
2024
Tianjin University
2022-2024
Hefei University of Technology
2023
Zhengzhou Preschool Education College
2022
Southeast University
2013-2022
State Key Laboratory on Integrated Optoelectronics
2022
Jilin University
2022
Southwest China Institute of Electronic Technology
2022
This paper investigates the secure transmission in a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) assisted uplink non-orthogonal multiple access system, where legitimate users send confidential signals to base station by exploiting STAR-RIS reconfigure electromagnetic propagation environment proactively. Depending on availability of eavesdropping channel state information (CSI), both full CSI statistical eavesdropper are considered. For scenario,...
We investigate a secrecy-enhancing design for cooperative downlink and uplink non-orthogonal multiple access (NOMA) transmissions with an untrusted relay. A source uses the NOMA principle to have near user far user, communications between are aided by To minimize information leakage at relay achieve secure communications, adaptive jamming schemes proposed, where in adaptively emit signal impair its eavesdropping capability. Both power optimized fully exploit benefits of proposed security...
Abstract The open‐circuit voltage ( V OC ) and fill factor (FF) of perovskite solar cells (PSCs) are detrimentally weakened by carrier loss at the perovskite/charge transport layers (CTLs) interfaces. Herein, a dual interfacial modification strategy via placing Nb 2 CT x nanosheets with tailored optoelectrical properties induced manipulating surface terminal groups both perovskite/CTLs interfaces is employed. Such tactics not only concurrently implement mobility enhancement CTLs interface...
Optimal relay selection is investigated for secure cooperative communications against an adaptive eavesdropper that can perform eavesdropping if the link has good channel quality or jamming otherwise. A number of decode-and-forward relays are available legitimate communications, among which one be selected to help. For three cases availability information considered: full knowledge, partial and statistical knowledge. An optimal scheme proposed each case. first third cases, exact secrecy...
This correspondence paper investigates a novel non-orthogonal multiple access (NOMA) assisted overlay spectrum sharing framework for multiuser cognitive radio networks toward an enhanced utilization. In particular, one secondary user is scheduled to help forward the primary signal and convey its own signals as well by applying NOMA principle. A reliability-oriented scheduling (R-SUS) scheme first proposed with target at minimal outage probabilities. Then, fairness-oriented (F-SUS) proposed,...
This paper designs a novel non-orthogonal multiple access (NOMA) unicast-multicast system, where number of unicast users (those who require different messages) and group multicast identical message) share the same time/space/frequency resource. For designed NOMA an efficient two-phase cooperation strategy is proposed to improve reliability all users. In first phase, base station (BS) broadcasts superposed message consisting users' information. second user selected forward information...
In this paper, a new meta-heuristic algorithm, called beetle swarm optimization (BSO) is proposed by enhancing the performance of through foraging principles. The 23 benchmark functions tested and compared with widely used algorithms, including particle (PSO) genetic algorithm (GA) grasshopper (GOA). Numerical experiments show that BSO outperforms its counterparts. Besides, to demonstrate practical impact two classic engineering design problems, namely, pressure vessel problem himmelblau?s...
This paper investigates the hybrid precoding design in millimeter-wave (mmWave) systems with a fully-adaptive-connected structure, where switch-controlled connection is deployed between every antenna and radio frequency (RF) chain. To maximally enhance energy efficiency (EE) of under this joint optimization connections precoders formulated as large-scale mixed-integer non-convex problem high-dimensional power constraints. efficiently solve such challenging problem, we first decouple it into...
The inherent broadcast characteristics of wireless medium make data transmission difficult to be shielded from unintended recipients. As such, secure communication over channels becomes a critical issue in the design networks. In this study, authors study cooperative jamming and power optimisation untrusted relay networks improve physical layer security. By exploiting direct link, source-based (SBJ) scheme is proposed hinder intercepting confidential message. Considering total budget,...
This paper proposes a blind equalization algorithm for dispersive wireless communication systems that employ high throughput quadrature amplitude modulation signals under both Gaussian and impulsive noise environments. A novel cost function combines the modulus match error with negative kernel is established to efficiently obtain weight vector associated equalizer. Some preferable properties of are presented. Intensive studies show proposed reduces maladjustment caused by mismatch suppresses...
There has been significant interest in exploring topological disclination states, which effectively probe the band topology of host material beyond conventional bulk-edge correspondence. While most studies this area have primarily focused on Hermitian systems, recent theoretical work predicts that non-Hermiticity can drive phase transitions and states associated with fractional charge. However, no experimental observations reported to date. Here, we report first observation electric...
This paper proposes a novel design of cooperative non-orthogonal layered multicast multiple access in heterogeneous network, where the information is encoded into messages high priority (HP) and low (LP). Two types users coexist network: 1) regular (RUs), which are located far away from base station (BS) expect to decode only HP message (due weak channels), 2) advanced (AUs), close BS both LP messages. To improve reliability multicast, we consider that successful AUs (those who successfully...
This paper studies the coordinated direct and relay transmission (CDRT) in non-orthogonal multiple access network, which consists of a base station (BS), cell-center user (CCU), cell edge (CEU), group half-duplex relays. During each transmission, BS sends information to CCU directly CEU with help one To improve reliability, novel dynamic detection CDRT (DD-CDRT) strategy is designed, fully exploits available side eliminate inter-user interference. Based on DD-CDRT strategy, we further...
Safe reinforcement learning aims to learn the optimal policy while satisfying safety constraints, which is essential in real-world applications. However, current algorithms still struggle for efficient updates with hard constraint satisfaction. In this paper, we propose Penalized Proximal Policy Optimization (P3O), solves cumbersome constrained iteration via a single minimization of an equivalent unconstrained problem. Specifically, P3O utilizes simple yet effective penalty approach...