Lianghui Ding
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View article: Multi-Level Damage-Aware Graph Learning for Resilient UAV Swarm Networks
Multi-Level Damage-Aware Graph Learning for Resilient UAV Swarm Networks Open
Unmanned aerial vehicle (UAV) swarm networks leverage resilient algorithms to restore connectivity from communication network split issues. However, existing graph learning-based approaches face over-aggregation and non-convergence problem…
View article: Knowledge- and Model-Driven Deep Reinforcement Learning for Efficient Federated Edge Learning: Single- and Multi-Agent Frameworks
Knowledge- and Model-Driven Deep Reinforcement Learning for Efficient Federated Edge Learning: Single- and Multi-Agent Frameworks Open
In this paper, we investigate federated learning (FL) efficiency improvement in practical edge computing systems, where edge workers have non-independent and identically distributed (non-IID) local data, as well as dynamic and heterogeneou…
View article: Multi-hop Differential Topology based Algorithms for Resilient Network of UAV Swarm
Multi-hop Differential Topology based Algorithms for Resilient Network of UAV Swarm Open
Unmanned aerial vehicle (UAV) swarm networks face severe challenges of communication network split (CNS) issues caused by massive damage in hostile environments. In this paper, we propose a new paradigm to restore network connectivity by r…
View article: Disentangling Regional Primitives for Image Generation
Disentangling Regional Primitives for Image Generation Open
This paper explains a neural network for image generation from a new perspective, i.e., explaining representation structures for image generation. We propose a set of desirable properties to define the representation structure of a neural …
View article: Fluid-Antenna Enhanced ISAC: Joint Antenna Positioning and Dual-Functional Beamforming Design under Perfect and Imperfect CSI
Fluid-Antenna Enhanced ISAC: Joint Antenna Positioning and Dual-Functional Beamforming Design under Perfect and Imperfect CSI Open
Integrated sensing and communication (ISAC) emerges as an essential technique for overcoming spectrum congestion. However, the performance of traditional ISAC systems with fixed-position-antennas (FPA) is limited due to insufficient spatia…
View article: A Visual–Inertial Pressure Fusion-Based Underwater Simultaneous Localization and Mapping System
A Visual–Inertial Pressure Fusion-Based Underwater Simultaneous Localization and Mapping System Open
Detecting objects, particularly naval mines, on the seafloor is a complex task. In naval mine countermeasures (MCM) operations, sidescan or synthetic aperture sonars have been used to search large areas. However, a single sensor cannot mee…
View article: MLE-based Device Activity Detection under Rician Fading for Massive Grant-free Access with Perfect and Imperfect Synchronization
MLE-based Device Activity Detection under Rician Fading for Massive Grant-free Access with Perfect and Imperfect Synchronization Open
Most existing studies on massive grant-free access, proposed to support massive machine-type communications (mMTC) for the Internet of things (IoT), assume Rayleigh fading and perfect synchronization for simplicity. However, in practice, l…
View article: Analysis and Optimization of A Double-IRS Cooperatively Assisted System with A Quasi-Static Phase Shift Design
Analysis and Optimization of A Double-IRS Cooperatively Assisted System with A Quasi-Static Phase Shift Design Open
The analysis and optimization of single intelligent reflecting surface (IRS)-assisted systems have been extensively studied, whereas little is known regarding multiple-IRS-assisted systems. This paper investigates the analysis and optimiza…
View article: Joint Optimization of Preamble Selection and Access Barring for Random Access in MTC with General Device Activities
Joint Optimization of Preamble Selection and Access Barring for Random Access in MTC with General Device Activities Open
Most existing random access schemes for machine-type communications (MTC) simply adopt a uniform preamble selection distribution, irrespective of the underlying device activity distributions. Hence, they may yield unsatisfactory access eff…
View article: Joint Optimization of Preamble Selection and Access Barring for MTC with Correlated Device Activities
Joint Optimization of Preamble Selection and Access Barring for MTC with Correlated Device Activities Open
Most existing works on random access for machine-type communication (MTC) assume independent device activities. However, in several Internet-of-Things (IoT) applications, device activities are driven by events and hence may be correlated. …
View article: Optimization of hybrid beamforming for multiuser massive MIMO systems with individual SINR and SLL constraints
Optimization of hybrid beamforming for multiuser massive MIMO systems with individual SINR and SLL constraints Open
This paper considers designing hybrid beamformer (HBF) to enhance communication performance and reduce inter-cell interference for massive MIMO system. The goal is minimizing the transmission power under individual signal-to-interference-p…
View article: Modeling and Evaluation of Piezoelectric Transducer (PZT)-Based Through-Metal Energy and Data Transfer
Modeling and Evaluation of Piezoelectric Transducer (PZT)-Based Through-Metal Energy and Data Transfer Open
Through-metal transfer of energy and data using piezoelectric transduce can avoid the potential leakage problem caused by physical penetrations and wired feed-through. The through-metal transfer efficiency of energy or data is determined b…
View article: Partially-Connected Hybrid Beamforming for Multi-User Massive MIMO Systems
Partially-Connected Hybrid Beamforming for Multi-User Massive MIMO Systems Open
Due to the high power consumption and hardware cost of radio frequency (RF) chains, the conventional fully-digital beamforming will be impractical for large-scale antenna systems (LSAS). To address this issue, hybrid beamforming has been p…
View article: Power Gain Pattern Synthesis via Successive Convex Approximation Technique
Power Gain Pattern Synthesis via Successive Convex Approximation Technique Open
Wide beam is necessary for ensuring the main lobe direction in a mobile communication scenario. A small dynamic range ratio (DRR) of excitations is crucial for simple-array and energy-saving design. The power gain pattern synthesis (PGPS) …
View article: Analysis and Optimization of Successful Symbol Transmission Rate for Grant-free Massive Access with Massive MIMO
Analysis and Optimization of Successful Symbol Transmission Rate for Grant-free Massive Access with Massive MIMO Open
Grant-free massive access is an important technique for supporting massive machine-type communications (mMTC) for Internet-of-Things (IoT). Two important features in grant-free massive access are low-complexity devices and short-packet dat…
View article: Analysis and Optimization of Outage Probability in Multi-Intelligent Reflecting Surface-Assisted Systems
Analysis and Optimization of Outage Probability in Multi-Intelligent Reflecting Surface-Assisted Systems Open
Intelligent reflecting surface (IRS) is envisioned to be a promising solution for designing spectral and energy efficient wireless systems. In this letter, we study a multi-IRS-assisted system under Rician fading where the phase shifts ada…
View article: Low Complexity Algorithms for Robust Multigroup Multicast Beamforming
Low Complexity Algorithms for Robust Multigroup Multicast Beamforming Open
Existing methods for robust multigroup multicast beamforming obtain feasible points using semidefinite relaxation (SDR) and Gaussian randomization, and have high computational complexity. In this letter, we consider the robust multigroup m…
View article: Optimal Hybrid Beamforming for Multiuser Massive MIMO Systems With Individual SINR Constraints
Optimal Hybrid Beamforming for Multiuser Massive MIMO Systems With Individual SINR Constraints Open
In this letter, we consider optimal hybrid beamforming design to minimize the transmission power under individual signal-to-interference-plus-noise ratio (SINR) constraints in a multiuser massive multiple-input-multiple-output (MIMO) syste…
View article: QoE-Oriented Resource Allocation for 360-degree Video Transmission over Heterogeneous Networks
QoE-Oriented Resource Allocation for 360-degree Video Transmission over Heterogeneous Networks Open
Immersive media streaming, especially virtual reality (VR)/360-degree video streaming which is very bandwidth demanding, has become more and more popular due to the rapid growth of the multimedia and networking deployments. To better explo…
View article: Joint and Competitive Caching Designs in Large-Scale Multi-Tier Wireless Multicasting Networks
Joint and Competitive Caching Designs in Large-Scale Multi-Tier Wireless Multicasting Networks Open
Caching and multicasting are two promising methods to support massive content delivery in multi-tier wireless networks. In this paper, we consider a random caching and multicasting scheme with caching distributions in the two tiers as desi…
View article: QoE-Based Resource Allocation for Heterogeneous Multi-Radio Communication in Software-Defined Vehicle Networks
QoE-Based Resource Allocation for Heterogeneous Multi-Radio Communication in Software-Defined Vehicle Networks Open
Recently, vehicle to everything (V2X) communications have drawn a significant amount of attention. Emerging V2X applications demand the efficient utilization of heterogeneous access technologies, such as long-term evolution (LTE), Wi-Fi, a…
View article: A QoS Guarantee Based Hybrid Media Access Control Protocol of Aeronautical Ad Hoc Network
A QoS Guarantee Based Hybrid Media Access Control Protocol of Aeronautical Ad Hoc Network Open
In order to meet different data rate and timeliness requirements of different services in aeronautical network communications based on frequency and time-hopping mechanism, a hybrid media access control protocol based on pre-allocation of …
View article: Hopf Bifurcation Control in a FAST TCP and RED Model via Multiple Control Schemes
Hopf Bifurcation Control in a FAST TCP and RED Model via Multiple Control Schemes Open
We focus on the Hopf bifurcation control problem of a FAST TCP model with RED gateway. The system gain parameter is chosen as the bifurcation parameter, and the stable region and stability condition of the congestion control model are give…