TY - GEN

T1 - Scalar Minimax Filter-based Phase Tracking for Continuous-Variable Quantum Key Distribution

AU - Al-sallami, Farah

AU - Rajbhandari, Sujan

AU - Ahmad, Zahir

AU - Grace, David

PY - 2022/9/1

Y1 - 2022/9/1

N2 - In local local oscillator (LLO)-based continuous-variable quantum key distribution (CV-QKD), a difference betweenthe linewidth values of two free-running lasers at Alice and Bobinduces a phase drift noise. This work proposes a novel minimaxfilter-based phase tracking that aims to minimize the phase driftconsidering maximum residual phase error to achieve optimalphase estimation. Simulation results show that the minimax filteroffers a lower phase estimation mean square error (MSE) valuecompared to the Kalman filter when worst-case phase drift errordue to high linewidth difference or high measurement noise valuesare considered.

AB - In local local oscillator (LLO)-based continuous-variable quantum key distribution (CV-QKD), a difference betweenthe linewidth values of two free-running lasers at Alice and Bobinduces a phase drift noise. This work proposes a novel minimaxfilter-based phase tracking that aims to minimize the phase driftconsidering maximum residual phase error to achieve optimalphase estimation. Simulation results show that the minimax filteroffers a lower phase estimation mean square error (MSE) valuecompared to the Kalman filter when worst-case phase drift errordue to high linewidth difference or high measurement noise valuesare considered.

M3 - Conference contribution

SP - 499

EP - 502

BT - 13th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)

ER -