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- W3046906937 abstract "Infrared free-space optics (FSO) provide an attractive solution for ultra-high-capacity wireless communications. However, the full potential of FSO is still being hindered by the apparent random fluctuations on the received optical power, which can be triggered by external factors such as atmospheric turbulence, weather instability, and pointing errors. Through the analysis of long-term experimental measurements, we identify the existence of significant time-domain memory in outdoor FSO links, which is found to be particularly strong under rainy weather conditions. Following this observation, we demonstrate that these memory effects can be effectively utilized to design accurate FSO channel estimation algorithms. Taking advantage of the arbitrary bit-rate granularity provided by probabilistic constellation shaping (PCS), and resorting to a simple moving average channel estimator, we demonstrate 400G+ transmission over a seamless fiber-FSO 55-m link with enhanced resilience towards adverse weather conditions. Comparing with unsupervised fixed modulation, we demonstrate a significant increase in average bit-rate (>35 Gbps) after continuous measurement over 3 hours, including raining periods." @default.
- W3046906937 created "2020-08-07" @default.
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- W3046906937 date "2020-12-01" @default.
- W3046906937 modified "2023-10-15" @default.
- W3046906937 title "Adaptive Probabilistic Shaped Modulation for High-Capacity Free-Space Optical Links" @default.
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- W3046906937 doi "https://doi.org/10.1109/jlt.2020.3012737" @default.
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