Scalar Minimax Filter-based Phase Tracking for Continuous-Variable Quantum Key Distribution

Farah Al-sallami, Sujan Rajbhandari, Zahir Ahmad, David Grace

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    Abstract

    In local oscillator (LLO)-based continuous-variable quantum key distribution (CV-QKD), a difference between the linewidth values of two free-running lasers at Alice and Bob induces a phase drift noise. This work proposes a novel minimax filter-based phase tracking that aims to minimize the phase drift considering maximum residual phase error to achieve optimal phase estimation. Simulation results show that the minimax filter offers a lower phase estimation mean square error (MSE) value compared to the Kalman filter when worst-case phase drift error due to high linewidth difference or high measurement noise values are considered.
    Original languageEnglish
    Title of host publication 2022 13th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)
    PublisherIEEE
    Pages499-502
    Number of pages4
    ISBN (Electronic)978-1-6654-1044-1
    DOIs
    Publication statusPublished - 6 Oct 2022
    Event2022 13th International Symposium on Communication Systems, Networks and Digital Signal Processing - Porto, Portugal
    Duration: 20 Jul 202222 Jul 2022
    Conference number: 13th
    https://csndsp2022.av.it.pt/

    Publication series

    Name2022 13th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2022

    Conference

    Conference2022 13th International Symposium on Communication Systems, Networks and Digital Signal Processing
    Abbreviated titleCSNDSP
    Country/TerritoryPortugal
    CityPorto
    Period20/07/2222/07/22
    Internet address

    Bibliographical note

    Publisher Copyright:
    © 2022 IEEE.

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