Faculty of Engineering

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Author: search.filters.author.Jayakody, D.N.KStart date: 2025

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    A Novel Sample-Splitting Receiver Architecture for SWIPT: Design and Resource Allocation
    (Institute of Electrical and Electronics Engineers Inc., 2026-06-08) Vithanage, G. S; Jayakody, D.N.K; Muthuchidambaranathan P.; Dinis, R
    This paper presents a novel sample splitting (SS) technique for simultaneous wireless information and power transfer (SWIPT), addressing the inefficiencies of conventional power splitting (PS) and time switching (TS) methods. Unlike traditional approaches, SS directly samples the received signal after it is captured by the antenna. Subsequently, the sampled signal is used for information decoding (ID), and the residual component is redirected towards energy harvesting (EH) by means of a single-pole double-throw (SPDT) switching mechanism. A digital receiver architecture is designed to implement SS, and its performance is evaluated against PS and TS through Monte Carlo simulations over Rayleigh fast fading channels. The results demonstrate an improved bit error rate (BER) and harvested power trade-off, with SS achieving maximum EH gains of approximately 189% over PS and 106% over TS under the considered system parameterization, providing its greatest advantage in ID-prioritized scenarios where the EH branch is most constrained.
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    Dual-Hop Hybrid Communication for Underwater and Terrestrial Systems: A Study on VLC and RF/FSO/THz Integration
    (Institute of Electrical and Electronics Engineers Inc., 2025) Rajahrajasingh, H; Jayakody, D.N.K; Tsiftsis, T.A
    This paper presents an analysis of dual-hop hybrid communication systems that integrate Visible Light Communication (VLC) for underwater transmission with three different terrestrial communication technologies. Specifically, we compare the performance of VLC with radio frequency (RF), free space optics (FSO), and terahertz (THz) communication in a cooperative framework involving a floating buoy as a relay node. Our results demonstrate that the THz-VLC combination significantly outperforms both the RF-VLC and FSO-VLC configurations in terms of Outage Probability (OP) and overall system efficiency. This work provides valuable insights into optimizing communication pathways in hybrid underwater-terrestrial environments, highlighting the potential of THz technology for enhanced data transmission.