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Maximum likelihood synchronization algorithm correction for photon-counting communications with blocking loss
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DOI：10.1364/OE.497343.png)
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To realize deep space optical communications with high capacity and sensitivity, synchronization of pulse-position modulation (PPM) signals is crucial. In this study, the maximum likelihood synchronization algorithm based on inter-symbol guard times was generalized to the scenario with strong blockage of single-photon detectors, where higher PPM slot frequency and signal-noise ratio could be adopted. Furthermore, a slot frequency offset compensation method was proposed, and simulations and experiments were performed to verify the performance improvement of the proposed corrected synchronization algorithm under blockage. The results indicated that the deadtime-corrected synchronization scheme could effectively overcome the performance degradation of the original model under high photon flux, provide estimation (0.02749 slots @ root-mean-square error) close to the Cramer-Rao Bound, and error rates close to ideal synchronization in the experiment.& COPY; 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Keyword:
SYMBOL
SLOT
期刊
IF:
3.3
论文数:
6.1W
被引数:
14.3W
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引用论文
Free space laser communication experiments from Earth to the Lunar Reconnaissance Orbiter in lunar orbit.png)
OPTICS EXPRESS
OAAI
OPTICS EXPRESSIF3.3
OAAI分享收藏Analysis and Rectification of the Asynchronous Sampling Effect in the Pulse-Position Modulation SystemsIEEE SENSORS JOURNAL
IEEE SENSORS JOURNALIF4.5
PREAI
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