Search Results for author: Naofal Al-Dhahir

Found 18 papers, 0 papers with code

SSwsrNet: A Semi-Supervised Few-Shot Learning Framework for Wireless Signal Recognition

no code implementations3 Apr 2024 Hao Zhang, Fuhui Zhou, Qihui Wu, Naofal Al-Dhahir

Moreover, a modular semi-supervised learning method that combines labeled and unlabeled data using MixMatch is exploited to further improve the classification performance under few-sample conditions.

Classification Few-Shot Learning

Low Complexity Radio Frequency Interference Mitigation for Radio Astronomy Using Large Antenna Array

no code implementations7 Mar 2024 Zaid Bin Tariq, Teviet Creighton, Louis P. Dartez, Naofal Al-Dhahir, Murat Torlak

In many cases, fast mitigation of strong radio frequency interference (RFI) is valuable for studying short lived radio transients so that the astronomers can perform detailed observations of celestial radio sources.

Astronomy

KGAMC: A Novel Knowledge Graph Driven Automatic Modulation Classification Scheme

no code implementations29 Feb 2024 Yike Li, Lu Yua, Fuhui Zhou, Qihui Wu, Naofal Al-Dhahir, Kai-Kit Wong

Automatic modulation classification (AMC) is a promising technology to realize intelligent wireless communications in the sixth generation (6G) wireless communication networks.

Feasibility Conditions for Mobile LiFi

no code implementations20 Dec 2023 Shuai Ma, Haihong Sheng, Junchang Sun, Hang Li, Xiaodong Liu, Chen Qiu, Majid Safari, Naofal Al-Dhahir, Shiyin Li

Then, we derive the expression of LiFi transmission rate based on the m-pulse-amplitude-modulation (M-PAM).

Performance Analysis and Optimization of Reconfigurable Multi-Functional Surface Assisted Wireless Communications

no code implementations4 Oct 2023 Wen Wang, Wanli Ni, Hui Tian, Naofal Al-Dhahir

To realize a self-sustainable communication system, we investigate the use of MF-RIS in improving the sum-rate of multi-user wireless networks.

A Partially Observable Deep Multi-Agent Active Inference Framework for Resource Allocation in 6G and Beyond Wireless Communications Networks

no code implementations22 Aug 2023 Fuhui Zhou, Rui Ding, Qihui Wu, Derrick Wing Kwan Ng, Kai-Kit Wong, Naofal Al-Dhahir

Simulation results demonstrate that our proposed framework can significantly improve the sum transmission rate of the secondary network compared to various benchmark schemes.

Cognitive Semantic Communication Systems Driven by Knowledge Graph: Principle, Implementation, and Performance Evaluation

no code implementations15 Mar 2023 Fuhui Zhou, Yihao Li, Ming Xu, Lu Yuan, Qihui Wu, Rose Qingyang Hu, Naofal Al-Dhahir

Extensive simulation results conducted on a public dataset demonstrate that our proposed single-user and multi-user cognitive semantic communication systems are superior to benchmark communication systems in terms of the data compression rate and communication reliability.

Data Compression

Features Disentangled Semantic Broadcast Communication Networks

no code implementations3 Mar 2023 Shuai Ma, Weining Qiao, Youlong Wu, Hang Li, Guangming Shi, Dahua Gao, Yuanming Shi, Shiyin Li, Naofal Al-Dhahir

Instead of broadcasting all extracted features, the semantic encoder extracts the disentangled semantic features, and then only the users' intended semantic features are selected for broadcasting, which can further improve the transmission efficiency.

feature selection

Task-oriented Explainable Semantic Communications

no code implementations27 Feb 2023 Shuai Ma, Weining Qiao, Youlong Wu, Hang Li, Guangming Shi, Dahua Gao, Yuanming Shi, Shiyin Li, Naofal Al-Dhahir

Furthermore, based on the $\beta $-variational autoencoder ($\beta $-VAE), we propose a practical explainable semantic communication system design, which simultaneously achieves semantic features selection and is robust against semantic channel noise.

Design and Performance Analysis of Wireless Legitimate Surveillance Systems with Radar Function

no code implementations13 Feb 2023 Mianyi Zhang, Yinghui He, Yunlong Cai, Guanding Yu, Naofal Al-Dhahir

We seek to jointly optimize the receive and transmit beamforming vectors to maximize the eavesdropping success probability which is transformed into the difference of signal-to-interference-plus-noise ratios (SINRs) subject to the performance requirements of radar and surveillance.

Joint Beamforming and PD Orientation Design for Mobile Visible Light Communications

no code implementations21 Dec 2022 Shuai Ma, Jing Wang, Chun Du, Hang Li, Xiaodong Liu, Youlong Wu, Naofal Al-Dhahir, Shiyin Li

To address this challenge, we propose an alternating optimization algorithm to obtain the transmit beamforming and the PD orientation.

Hierarchical Multi-Agent DRL-Based Framework for Joint Multi-RAT Assignment and Dynamic Resource Allocation in Next-Generation HetNets

no code implementations28 Feb 2022 Abdulmalik Alwarafy, Bekir Sait Ciftler, Mohamed Abdallah, Mounir Hamdi, Naofal Al-Dhahir

This paper considers the problem of cost-aware downlink sum-rate maximization via joint optimal radio access technologies (RATs) assignment and power allocation in next-generation heterogeneous wireless networks (HetNets).

Outage Constrained Robust Secure Beamforming in Cognitive Satellite-Aerial Networks

no code implementations13 May 2021 Bai Zhao, Min Lin, Ming Cheng, Wei-Ping Zhu, Naofal Al-Dhahir

This paper proposes a robust beamforming scheme to enhance the physical layer security (PLS) of multicast transmission in a cognitive satellite and aerial network (CSAN) operating in the millimeter wave frequency band.

Reconfigurable Intelligent Surface Assisted Cooperative Non-orthogonal Multiple Access Systems

no code implementations18 Nov 2020 Jiakuo Zuo, Yuanwei Liu, Naofal Al-Dhahir

In each alternative procedure, the optimal solutions for the active beamforming vectors, transmit-relaying power and phase shifts are obtained.

A Comprehensive Overview on 5G-and-Beyond Networks with UAVs: From Communications to Sensing and Intelligence

no code implementations19 Oct 2020 Qingqing Wu, Jie Xu, Yong Zeng, Derrick Wing Kwan Ng, Naofal Al-Dhahir, Robert Schober, A. Lee Swindlehurst

On the other hand, providing such communication services simultaneously for both UAV and ground users poses new challenges due to the need for ubiquitous 3D signal coverage as well as the strong air-ground network interference.

Reconfigurable Intelligent Surfaces: Principles and Opportunities

no code implementations7 Jul 2020 Yuanwei Liu, Xiao Liu, Xidong Mu, Tianwei Hou, Jiaqi Xu, Marco Di Renzo, Naofal Al-Dhahir

In this context, we provide a comprehensive overview of the state-of-the-art on RISs, with focus on their operating principles, performance evaluation, beamforming design and resource management, applications of machine learning to RIS-enhanced wireless networks, as well as the integration of RISs with other emerging technologies.

BIG-bench Machine Learning Management

Exploiting Intelligent Reflecting Surfaces in NOMA Networks: Joint Beamforming Optimization

no code implementations30 Oct 2019 Xidong Mu, Yuanwei Liu, Li Guo, Jiaru Lin, Naofal Al-Dhahir

Our goal is to maximize the sum rate of all users by jointly optimizing the active beamforming at the BS and the passive beamforming at the IRS, subject to successive interference cancellation decoding rate conditions and IRS reflecting elements constraints.

Quantization

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