62 citations · 147 across the 25 of their papers we have counts for
29 papers
Multi-Shot Quantum Sensing for RF Signal Detection with MIMO Rydberg-Atom Receivers
Saman Atapattu, Harini Hapuarachchi, Nathan Ross
Rydberg-atom quantum receivers (RAQRs) enable electric-field sensing with quantum-noise-limited performance, yet their optical readout provides only magnitude measurements whose fl…
Dynamic Scheduling for Enhanced Performance in RIS-assisted Cooperative Network with Interference
Yomali Lokugama, Saman Atapattu, Nathan Ross +2
Reconfigurable Intelligent Surfaces (RIS) have emerged as transformative technologies, enhancing spectral efficiency and improving interference management in multi-user cooperative…
Opportunistic Beamforming and Dynamic Scheduling for Multi-User MIMO-ISAC Systems
Tharaka Perera, Saman Atapattu, Chathuranga Weeraddana +1
This research presents a novel framework integrating Flexible-Duplex (FlexD) and Integrated Sensing and Communications (ISAC) technologies to address the challenges of spectrum eff…
Max-Min Fairness for IRS-Assisted Secure Two-Way Communications
Harindu Jayarathne, Tharindu Wickremasinghe, Kasun T. Hemachandra +2
This paper investigates an intelligent reflective surface (IRS) assisted secure multi-user two-way communication system. The aim of this paper is to enhance the physical layer secu…
Detection of Signals in Colored Noise: Roy's Largest Root Test for Non-central -matrices
Prathapasinghe Dharmawansa, Saman Atapattu, Jamie Evans +1
This paper investigates the signal detection problem in colored noise with an unknown covariance matrix. In particular, we focus on detecting a non-random signal by capitalizing on…
Standard Condition Number-Based Robust Signal Detection with Whitening under Uncertainty
Tharindu Udupitiya, Saman Atapattu, Prathapasinghe Dharmawansa +2
Robust signal detection in colored noise with unknown covariance is essential in radar, cognitive radio, integrated sensing and communication (ISAC), and quantum sensing applicatio…
Graph Neural Networks for Physical-Layer Security in Multi-User Flexible-Duplex Networks
Tharaka Perera, Saman Atapattu, Yuting Fang +1
This paper explores Physical-Layer Security (PLS) in Flexible Duplex (FlexD) networks, considering scenarios involving eavesdroppers. Our investigation revolves around the intricac…
Detection of Signals in Colored Noise: Leading Eigenvalue Test for Non-central -matrices
Prathapasinghe Dharmawansa, Saman Atapattu, Jamie Evans +1
This paper investigates the signal detection problem in colored noise with an unknown covariance matrix. In particular, we focus on detecting an unknown non-random signal by capita…
Distributed CSMA/CA MAC Protocol for RIS-Assisted Networks
Zhou Zhang, Saman Atapattu, Yizhu Wang +1
This paper focuses on achieving optimal multi-user channel access in distributed networks using a reconfigurable intelligent surface (RIS). The network includes wireless channels w…
A Sample-Deficient Analysis of the Leading Generalized Eigenvalue for the Detection of Signals in Colored Gaussian Noise
Prathapasinghe Dharmawansa, Saman Atapattu, Jamie Evans +1
This paper investigates the signal detection problem in colored Gaussian noise with an unknown covariance matrix. To be specific, we consider a sample deficient scenario in which t…
Joint Task Offloading and Resource Allocation for IoT Edge Computing with Sequential Task Dependency
Xuming An, Rongfei Fan, Han Hu +3
Incorporating mobile edge computing (MEC) in the Internet of Things (IoT) enables resource-limited IoT devices to offload their computation tasks to a nearby edge server. In this p…
Relay Assisted Underlay Cognitive Radio Networks with Multiple Users
Lanwei Zhang, Rajitha Senanayake, Saman Atapattu +1
In this letter, we consider an underlay cognitive radio network assisted by dual-hop decode-and-forward (DF) relaying. For a general multi-user network, we adopt a max-min fairness…
Optimum Reconfigurable Intelligent Surface Selection for Wireless Networks
Yuting Fang, Saman Atapattu, Hazer Inaltekin +1
The reconfigurable intelligent surface (RIS) is a promising technology that is anticipated to enable high spectrum and energy efficiencies in future wireless communication networks…
Joint Task Offloading and Resource Allocation for IoT Edge Computing with Sequential Task Dependency
Xuming An, Rongfei Fan, Han Hu +3
Incorporating mobile edge computing (MEC) in Internet of Things (IoT) enables resource-limited IoT devices to offload their computation tasks to a nearby edge server. In this paper…
Performance Analysis of a Two-Tile Reconfigurable Intelligent Surface Assisted MIMO System
Prathapasinghe Dharmawansa, Saman Atapattu, Marco Di Renzo
We consider a two--tile reconfigurable intelligent surface (RIS) assisted wireless network with a two-antenna transmitter and receiver over Rayleigh fading. We show that the averag…
Optimum Location-Based Relay Selection in Wireless Networks
Hazer Inaltekin, Saman Atapattu, Jamie S. Evans
This paper studies the performance and key structural properties of the optimum location-based relay selection policy for wireless networks consisting of homogeneous Poisson distri…
Latency Minimization with Optimum Workload Distribution and Power Control for Fog Computing
Saman Atapattu, Chathuranga Weeraddana, Minhua Ding +2
This paper investigates a three-layer IoT-fog-cloud computing system to determine the optimum workload and power allocation at each layer. The objective is to minimize maximum per-…
Reconfigurable Intelligent Surface assisted Two-Way Communications: Performance Analysis and Optimization
Saman Atapattu, Rongfei Fan, Prathapasinghe Dharmawansa +3
In this paper, we investigate the two-way communication between two users assisted by a re-configurable intelligent surface (RIS). The scheme that two users communicate simultaneou…
Physical-Layer Security for Untrusted UAV-Assisted Full-Duplex Wireless Networks
Theshani Nuradha, Kasun T. Hemachandra, Tharaka Samarasinghe +1
The paper considers physical layer security (PLS) of an untrusted unmanned aerial vehicle (UAV) network, where a multitude of UAVs communicate in full-duplex (FD) mode. A source-ba…
Resource Allocation in Dynamic DF Relay for SWIPT Network with Circuit Power Consumption
Bhathiya Pilanawithana, Saman Atapattu, Jamie Evans
This paper considers simultaneous wireless information and power transfer (SWIPT) over a dual-hop dynamic decode-and-forward (DF) relay network with the power-splitting (PS) energy…
Channel Estimation for Ambient Backscatter Communication Systems with Massive-Antenna Reader
Wenjing Zhao, Gongpu Wang, Saman Atapattu +2
Ambient backscatter, an emerging green communication technology, has aroused great interest from both academia and industry. One open problem for ambient backscatter communication…
Location-Based Optimum Relay Selection in Random Spatial Networks
Saman Atapattu, Hazer Inaltekin, Jamie Evans
This paper investigates the location-based relay selection problem, where the source node chooses its relay from a set of spatially deployed decode-and-forward relays. The advantag…
Eigenvalue Based Detection of a Signal in Colored Noise: Finite and Asymptotic Analyses
Lahiru D. Chamain, Prathapasinghe Dharmawansa, Saman Atapattu +1
Signal detection in colored noise with an unknown covariance matrix has a myriad of applications in diverse scientific/engineering fields. The test statistic is the largest general…
Opportunistic Wireless Energy Transfer in Point-to-Point Links
Amanthi Thudugalage, Saman Atapattu, Jamie Evans
In this paper we consider wireless energy transfer for a point-to-point link. The energy transmitter sees a finite number of independent channel realizations, and, armed with (caus…