Moon, HJ; Chae, CB; Wong, KK; Alouini, MS; (2023) Pointing-and-Acquisition for Optical Wireless in 6G: From Algorithms to Performance Evaluation. IEEE Communications Magazine pp. 1-8. 10.1109/MCOM.001.2300285. (In press).

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Abstract

The increasing demand for wireless communication services has led to the development of non-terrestrial networks, which enables various air and space applications. Free-space optical (FSO) communication is considered one of the essential technologies capable of connecting terrestrial and non-terrestrial layers. In this article, we analyze considerations and challenges for FSO communications between gateways and aircraft from a pointing-and-acquisition perspective. Based on the analysis, we first develop a baseline method that utilizes conventional devices and mechanisms. Furthermore, we propose an algorithm that combines angle of arrival (AoA) estimation through supplementary radio frequency (RF) links and beam tracking using retroreflectors. Through extensive simulations, we demonstrate that the proposed method offers superior performance in terms of link acquisition and maintenance.

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