Derrick Wing Kwan Ng

AFDM-Aided Grouped RSMA for High-Mobility Downlink Transmissions

Rate-splitting multiple access (RSMA) has emerged as a flexible downlink framework for managing multiuser interference through common and private message splitting. However, in high-mobility scenarios, Doppler-induced intercarrier interference degrades RSMA-based transmission and motivates integration with a transform-...

Spatially Reconfigurable Pinching-Antenna Systems: Experimental Validation and ISAC Applications

Future integrated sensing and communication (ISAC) networks require wireless platforms that can adapt not only their signals but also the physical locations from which they radiate and observe. This article presents pinching-antenna systems (PASS) as a spatially adaptive platform for ISAC. PASS adopts dielectric wavegu...

Joint Beamforming and RIS Design Against a Multi-Antenna Active Eavesdropper

This paper investigates a secure integrated sensing and communication (ISAC) system assisted by a reconfigurable intelligent surface (RIS). We consider a challenging threat scenario involving a multi-antenna full-duplex eavesdropper that not only wiretaps confidential communication signals but also actively emits jammi...

Sensing-Then-Transmit: A Two-Phase Secure ISAC Framework

This paper develops a two-phase secure integrated sensing and communication (ISAC) framework, where a dual-function transmitter (Alice) detects the presence of a potential eavesdropper (Eve) as a sensing target in the first phase. In the second phase, Alice adapts her secure transmission strategy based on the sensing o...

Accelerating Federated Learning Under Client Dropout via Joint Bandwidth Allocation and Prototype Fine-Tuning in Mobile Edge Computing Networks

Deploying federated learning (FL) in mobile edge computing (MEC) networks enables collaborative model training while preserving the privacy of raw data. However, due to system heterogeneity, statistical heterogeneity of mobile clients (MCs), and client dropout, optimizing bandwidth allocation and fine-tuning the global...

Age-Energy Tradeoff in UAV-Aided ISAC Networks With MEC: An SA-PPO-Based Approach

Pruning-Assisted Vehicular Federated Learning for CNN Training under Mobility-Aware Constraints

Vehicular federated learning (VFL) has been widely adopted for collaborative edge training in vehicular networks to exploit massive onboard data while preserving data privacy and security. The dynamic nature of VFL training results in inconsistent client participation and unreliable timely model uploads due to vehicula...

Movable Antenna-Enabled Covert Communications in ISAC Networks

Movable antennas (MAs) can reshape the propagation environment by continuously adjusting their spatial positions compared with fixed-position antennas (FPAs). Leveraging this advantage, we develop an alternating optimization framework for covert integrated sensing and communication (ISAC) systems. This framework jointl...

Disentangling Dual-Polarized Channel Representations for Accurate User Localization

Indoor localization has emerged as a critical enabling technology for various smart applications, yet its performance is constrained by multipath propagation, signal blockage, and environmental dynamics. While recent deep learning (DL)-based approaches have demonstrated promising improvements over traditional technique...

A Confidence-Aware Semi-Supervised Learning Framework for Automatic Modulation Recognition

Automatic modulation recognition (AMR) is a cornerstone of dynamic spectrum allocation and cognitive radio. Despite the promise of deep learning-based methods, their reliance on large labeled datasets limits their practicality in scenarios with scarce labeled samples. To address this, we propose a confidence-aware semi...

ISAC with Co-Prime Arrays: Virtual-Aperture Sensing and uplink downlink communications

A shared-aperture ISAC architecture in which a sparse co-prime array (CPA) is embedded in a uniform linear array (ULA) grid for FD sensing, while the remaining antenna positions support time-division duplexing (TDD) communication is proposed.

Integrated Sensing, Communication, and Power Transfer for Fluid-Antenna LEO Satellite Systems

Emerging technologies including wireless power transfer (WPT), integrated sensing and communication (ISAC), and fluid antennas (FAs), have significantly advanced the capabilities and performance of modern satellite communication systems. This paper investigates an FA-assisted integrated sensing, communication, and powe...