Change detection for SAR images based on quantum-inspired immune clonal clustering algorithm

Li, Yangyang; Wu, Na-Na; Jiao, Licheng; Shang, Ronghua; Liu, Ruochen

doi:10.3724/sp.j.1010.2011.00372

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…that can change the position or phase delay of the fast/slow axes of the wave plate) of polarization controller, including piezo electric polarization controller (EPC) 14 , liquid-crystal variable retarders (LCVR) 15 , lithium niobite (LiNbO3) crystal 16 , and crystal waveplate group(WPG) 11 , among others, using a polarization detection system. To identify these optimal parameters, feedback control algorithms, including stochastic parallel gradient descent (SPGD) algorithm 17 , Jacobian algorithm 18 , and fast-locating algorithm 19 , are commonly employed. These algorithms adjust the parameters of controller continuously to achieve an iterative approximation of the lowest quantum bit error rate (QBER).…”

Section: Introductionmentioning

confidence: 99%

Real-time polarization compensation method in quantum communication based on channel Muller parameters detection

Tan,

Wang,

et al. 2024

Commun Eng

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Polarization drift in fiber and free-space optical links is a major factor in the dynamic increase of bit error rate in polarization-coded quantum key distribution (QKD) systems. A dynamic polarization compensation method applicable to both links is a challenge. Here we propose a universally applicable real-time polarization compensation method, that the Muller parameters of the optical links are first detected using a polarization detector, and then the optimal parameters of the controller are obtained by gradient descent algorithm. Simulation results indicate advantages over current methods, with fewer waveplates, faster speed, and wider applicability for various optical links. In equivalent experiments of both satellite and fiber optical links, the average polarization extinction ratio of 27.9 dB and 32.2 dB are respectively achieved. The successful implementation of our method will contribute to the real-time polarization design of fiber and free-space QKD systems, while also contributing to the design of laser-based polarization systems.

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