13 papers · 1 filter
Pseudo-Noise Superposition for Finite-Alphabet Physical Layer Security
Fernando Moya Caceres, Chamath Divarathne, Yapeng Xie +4
Physical-layer security based on pseudo-noise (PN) superposition is a promising approach for mitigating eavesdropping in future wireless systems. However, under Shannon's capacity…
Performance Analysis of Flexible Duplex Inter-Satellite Links in LEO Networks
Yomali Lokugama, Charith Dissanayake, Saman Atapattu +1
This paper investigates energy-efficient inter-satellite communication in Low Earth Orbit (LEO) networks, where satellites exchange both buffered and newly generated data through h…
Standard Condition Number-Based Detection for MIMO ISAC Systems under Noise Uncertainty
Alex Obando, Tharindu Udupitiya, Saman Atapattu +1
This paper presents a unified analytical and optimization framework for Standard Condition Number (SCN)-based detection in MIMO Integrated Sensing and Communication (ISAC) systems…
Backscatter-Assisted High-Speed Rail Communications in Straight Tunnel Environments: Effects of Tag Number and Phase Control
Yunping Mu, Gongpu Wang, Ruisi He +3
Backscatter communication is a promising technology to enhance the signal strength received by the receiver in straight tunnel environments. The impact of the number of tags and th…
Performance Analysis for Multi-User Holographic MIMO Downlink with Matched Filter Precoding
Gayathri Shekar, Saman Atapattu, Prathapasinghe Dharmawansa +1
Holographic MIMO (HMIMO) has emerged as a promising solution for future wireless systems by enabling ultra-dense, spatially continuous antenna deployments. While prior studies have…
Joint Probing and Scheduling for Cache-Aided Hybrid Satellite-Terrestrial Networks
Zhou Zhang, Yizhu Wang, Saman Atapattu +1
Caching is crucial in hybrid satellite-terrestrial networks to reduce latency, optimize throughput, and improve data availability by storing frequently accessed content closer to u…
Null-Shaping for Interference Mitigation in LEO Satellites Under Location Uncertainty
Fernando Moya Caceres, Akram Al-Hourani, Saman Atapattu +1
Radio frequency interference (RFI) poses a growing challenge to satellite communications, particularly in uplink channels of Low Earth Orbit (LEO) systems, due to increasing spectr…
Eigenvalue-Based Detection in MIMO Systems for Integrated Sensing and Communication
Alex Obando, Saman Atapattu, Prathapasinghe Dharmawansa +2
This paper considers a MIMO Integrated Sensing and Communication (ISAC) system, where a base station simultaneously serves a MIMO communication user and a remote MIMO sensing recei…
Uniform Planar Array Based Weighted Cooperative Spectrum Sensing for Cognitive Radio Networks
Charith Dissanayake, Saman Atapattu, Prathapasinghe Dharmawansa +3
Cooperative spectrum sensing (CSS) is essential for improving the spectrum efficiency and reliability of cognitive radio applications. Next-generation wireless communication networ…
Opportunistic Subarray Grouping for RIS-Aided Massive Random Access in Cellular Connectivity
Yizhu Wang, Zhou Zhang, Saman Atapattu +1
In Reconfigurable Intelligent Surfaces (RIS), reflective elements (REs) are typically configured as a single array, but as RE numbers increase, this approach incurs high overhead f…
Throughput Optimization in Cache-aided Networks: An Opportunistic Probing and Scheduling Approach
Zhou Zhang, Saman Atapattu, Yizhu Wang +1
This paper addresses the challenges of throughput optimization in wireless cache-aided cooperative networks. We propose an opportunistic cooperative probing and scheduling strategy…
Interference Mitigation in LEO Constellations with Limited Radio Environment Information
Fernando Moya Caceres, Akram Al-Hourani, Saman Atapattu +8
This research paper delves into interference mitigation within Low Earth Orbit (LEO) satellite constellations, particularly when operating under constraints of limited radio enviro…
Dynamic Cooperative MAC Optimization in RSU-Enhanced VANETs: A Distributed Approach
Zhou Zhang, Saman Atapattu, Yizhu Wang +2
This paper presents an optimization approach for cooperative Medium Access Control (MAC) techniques in Vehicular Ad Hoc Networks (VANETs) equipped with Roadside Unit (RSU) to enhan…