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  • NRN147 - Multilevel Subcarrier Index-Power Modulated Optical OFDM for IMDD PON Systems

    IEEE Photonics Journal

    • Sensors and Devices, 
    • Modelling

    In a previously published transmission technique known as subcarrier indexpower modulated optical OFDM (SIPM-OOFDM), a new subcarrier index-power (SIP) information-bearing dimension is introduced to enable SIPM-OOFDM to carry one extra information bit per subcarrier. As a significantly improved variant of SIPM-OOFDM, in this paper, a novel signal transmission technique termed multilevel subcarrier index-power modulated OOFDM (ML-SIPM-OOFDM) is proposed and extensively explored for the first time.

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  • NRNC20 Fuzzy Hierarchal Approach-Based Optimal Frequency Control in the Great Britain Power System

    Electric Power Systems Research

    • Sensors and Devices, 
    • Modelling, 
    • Knowledge Transfer, 
    • Materials

    A design of fuzzy-based hierarchal approach is proposedto improve the frequency control in the power system. The simplified Great Britain (GB) frequency control model, was used as a single bus machine. A new simple tuning method is proposed with the aid of the conventional PID controller gains.The same gains are used to feed the fuzzy controller in the same loop without re-tuning the fuzzy gains. This method allows the fuzzy structure to supplement the conventional control rather than replacing it.

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  • NRN024 Experimental Demonstration of Upstream Transmission in Digital Filter Multiple Access PONs With Real-Time Reconfigurable Optical Network Units

    The Optical Society

    • Sensors and Devices, 
    • Modelling

    In this paper, for the first time to our knowledge, multipoint-to-point upstream signal transmission in intensity-modulation and direct-detection (IMDD) DFMA PONs is experimentally demonstrated using two real-time, reconfigurable, optical orthogonal frequency division multiplexing-modulated ONUs and an offline optical line terminal.

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  • NRN038 - A new Jameson-Schmidt-Turkel Smooth Particle Hydrodynamics algorithm for large strain explicit fast dynamics

    Science Direct

    • Modelling

    This paper presents a new Smooth Particle Hydrodynamics (SPH) computational framework for large strain explicit solid dynamics.

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  • NRN024 Multiple Channel Interference Cancellation of Digital Filter Multiple Access PONs

    IEEE Xplore

    • Sensors and Devices, 
    • Modelling

    In this paper, a DFMA channel interference cancellation (DCIC) technique is, for the first time, proposed and extensively investigated, to significantly improve the downstream and upstream performance of the IMDD DFMA PONs. A comprehensive DCIC theoretical model is developed, and through fitting with experimental measurements, the developed theoretical model is rigorously verified and a set of accurate transceiver/system parameters is identified.

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