4 citations · 12 across the 17 of their papers we have counts for
19 papers
Reconfigurable Intelligent Surfaces for Cognitive Radio Networks: Design, Optimization, and Emerging Trends
Diluka Galappaththige, Chintha Tellambura, Ranga Kulathunga +1
Reconfigurable intelligent surfaces (RISs) enable programmable wireless propagation environments, offering new opportunities for cognitive radio networks (CRNs) to improve spectrum…
Cell-Free Integrated Sensing and Communication
Diluka Galappaththige, Chintha Tellambura
Cell-free (CF) integrated sensing and communication (ISAC) merges the CF architecture with ISAC functionalities. CF-ISAC leverages distributed access points, removes cell boundarie…
Set Transformer-Based Beamforming Design for Cell-Free Integrated Sensing and Communication
Ranga Kulathunga, Diluka Galappaththige, Gayan Aruma Baduge +1
Existing cell-free integrated sensing and communication (CF-ISAC) beamforming algorithms predominantly rely on classical optimization techniques, which often entail high computatio…
Wideband Cognitive Radio for Joint Communication and Sensing: Optimization of Subcarrier Allocation and beamforming
Diluka Galappaththige, Chintha Tellambura
As data traffic grows, wireless systems shift to higher frequency bands (6 GHz and above), where radar systems also operate. This coexistence demands effective interference managem…
Cell-Free Integrated Sensing and Communication: Principles, Advances, and Future Directions
Diluka Galappaththige, Mohammadali Mohammadi, Gayan Aruma Baduge +1
Cell-free (CF) integrated sensing and communication (ISAC) combines CF architecture with ISAC. CF employs distributed access points, eliminates cell boundaries, and enhances covera…
Low-Complexity Multi-Target Detection in ELAA ISAC
Diluka Galappaththige, Shayan Zargari, Chintha Tellambura +1
Multi-target detection and communication with extremely large-scale antenna arrays (ELAAs) operating at high frequencies necessitate generating multiple beams. However, conventiona…
Cell-Free Full-Duplex Communication -- An Overview
Diluka Galappaththige, Mohammadali Mohammadi, Hien Quoc Ngo +2
Cell-free (CF) architecture and full-duplex (FD) communication are leading candidates for next-generation wireless networks. The CF framework removes cell boundaries in traditional…
Downlink Beamforming for Cell-Free ISAC: A Fast Complex Oblique Manifold Approach
Shayan Zargari, Diluka Galappaththige, Chintha Tellambura +1
Cell-free integrated sensing and communication (CF-ISAC) systems are just emerging as an interesting technique for future communications. Such a system comprises several multiple-a…
Optimization of Rate-Splitting Multiple Access with Integrated Sensing and Backscatter Communication
Diluka Galappaththige, Shayan Zargari, Chintha Tellambura +1
An integrated sensing and backscatter communication (ISABC) system is introduced herein. This system features a full-duplex (FD) base station (BS) that seamlessly merges sensing wi…
A Riemannian Manifold Approach to Constrained Resource Allocation in ISAC
Shayan Zargari, Diluka Galappaththige, Chintha Tellambura +1
This paper introduces a new resource allocation framework for integrated sensing and communication (ISAC) systems, which are expected to be fundamental aspects of sixth-generation…
Sensing and Backscatter Communication Integration: Realizing Efficiency in Wireless Systems for IoT
Shayan Zargari, Diluka Galappaththige, Chintha Tellambura
In an era driven by the Internet of Things (IoT) and rapid wireless communication advances, the synergy between sensing and backscatter communication (BackCom) has emerged as a fro…
Cell-Free Bistatic Backscatter Communication: Channel Estimation, Optimization, and Performance Analysis
Diluka Galappaththige, Fatemeh Rezaei, Chintha Tellambura +1
This study introduces and investigates the integration of a cell-free architecture with bistatic backscatter communication (BiBC), referred to as cell-free BiBC or distributed acce…
RIS-Assisted Energy Harvesting Gains for Bistatic Backscatter Networks: Performance Analysis and RIS Phase Optimization
Diluka Galappaththige, Fatemeh Rezaei, Chintha Tellambura +1
Inexpensive tags powered by energy harvesting (EH) can realize green (energy-efficient) Internet of Things (IoT) networks. However, tags are vulnerable to energy insecurities, resu…
Time-Spread Pilot-Based Channel Estimation for Backscatter Networks
Fatemeh Rezaei, Diluka Galappaththige, Chintha Tellambura +1
Current backscatter channel estimators employ an inefficient silent pilot transmission protocol, where tags alternate between silent and active states. To enhance performance, we p…
NOMA-Assisted Symbiotic Backscatter: Novel Beamforming Designs Under Imperfect SIC
Fatemeh Rezaei, Diluka Galappaththige, Chintha Tellambura +1
Optimal beamforming designs under imperfect successive interference cancellation (SIC) decoding for a symbiotic network of non-orthogonal multiple access (NOMA) primary users and a…
Performance Analysis of IRS-Assisted Cell-Free Communication
Diluka Loku Galappaththige, Dhanushka Kudathanthirige, Gayan Amarasuriya
In this paper, the feasibility of adopting an intelligent reflective surface (IRS) in a cell-free wireless communication system is studied. The received signal-to-noise ratio (SNR)…
Exploiting Underlay Spectrum Sharing in Cell-Free Massive MIMO Systems
Diluka Loku Galappaththige, Gayan Amarasuriya Aruma Baduge
We investigate the coexistence of underlay spectrum sharing in cell-free massive multiple-input multiple-output (MIMO) systems. A primary system with geographically distributed pri…
Exploiting Cell-Free Massive MIMO for Enabling Simultaneous Wireless Information and Power Transfer
Diluka Loku Galappaththige, Rajan Shrestha, Gayan Amarasuriya Aruma Baduge
The performance of simultaneous wireless information and power transfer (SWIPT) in downlink (DL) cell-free massive multiple-input multiple-output (MIMO) is investigated. Tight appr…
Performance Analysis of Distributed Intelligent Reflective Surfaces for Wireless Communications
Diluka Loku Galappaththige, Dhanushka Kudathanthirige, Gayan Amarasuriya Aruma Baduge
In this paper, a comprehensive performance analysis of a distributed intelligent reflective surfaces (IRSs)-aided communication system is presented. First, the optimal signal-to-no…