Scintillation robust adaptive optical signal detection in free-space optical communications using CSI prediction
In this paper, an adaptive multi-level symbol detection technique was proposed to enhance receiver performance in free-space optical communications. Owing to the slow varying characteristic of scintillation, an adaptive linear prediction (ALP) filter is used to predict the channel state information (CSI) of the upcoming frame. A Mach-Zehnder modulator (MZM) based channel emulator was used to emulate the turbulence-induced scintillation, experimentally. The proof-of-concept experiment demonstrated that the proposed technique showed better transmission performance than that of the maximum likelihood (ML) based fixed threshold detection technique.
Yonsei Univ. (Korea, Republic of)
Jae-Young Choi received his BS degree in electrical and electronic engineering at Yonsei University, Seoul, Republic of Korea, in 2017. At present, he is working toward his Ph.D. in electrical and electronic engineering at Yonsei University. His current research interests include inter-satellite optical communication, NTN architecture, and free-space optical systems.