An Improved Adaptive Coding and Modulation Scheme With Hybrid Switching Standard for UAV-to-Ground Free Space Optical Communication

Qianwu Zhang; Boyang Liu; Guanwen Chen; Shucheng Zhan; Zhiyu Li; Jing Zhang; Ning Jiang; Bingyao Cao; Zhengxuan Li

doi:10.1109/JPHOT.2023.3329648

IEEE Photonics Journal (Jan 2024)

An Improved Adaptive Coding and Modulation Scheme With Hybrid Switching Standard for UAV-to-Ground Free Space Optical Communication

Qianwu Zhang,
Boyang Liu,
Guanwen Chen,
Shucheng Zhan,
Zhiyu Li,
Jing Zhang,
Ning Jiang,
Bingyao Cao,
Zhengxuan Li

Affiliations

Qianwu Zhang: ORCiD; Key Laboratory of Specialty Optics and Optical Access Networks, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China
Boyang Liu: ORCiD; Key Laboratory of Specialty Optics and Optical Access Networks, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China
Guanwen Chen: Key Laboratory of Specialty Optics and Optical Access Networks, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China
Shucheng Zhan: Key Laboratory of Specialty Optics and Optical Access Networks, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China
Zhiyu Li: Key Laboratory of Specialty Optics and Optical Access Networks, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China
Jing Zhang: ORCiD; School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, China
Ning Jiang: ORCiD; School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, China
Bingyao Cao: Key Laboratory of Specialty Optics and Optical Access Networks, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China
Zhengxuan Li: ORCiD; Key Laboratory of Specialty Optics and Optical Access Networks, Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai, China

DOI: https://doi.org/10.1109/JPHOT.2023.3329648
Journal volume & issue: Vol. 16, no. 1
pp. 1 – 8

Abstract

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In this paper, an improved adaptive coding and modulation scheme with hybrid switching standard is proposed for UAV-to-Ground free space optical (FSO) communication to mitigate the degradation of turbulence intensity variation. In order to improve bits efficiency in different turbulence, a channel estimator based on Gated Recurrent Unit (GRU) and a hybrid switching standard based on frame error rate (FER) of LDPC decoding are applied. Simulation results show that the GRU estimator achieves approximately 34.9% improvement in training time compared to the LSTM estimator, without degradation in system performance. Moreover, the hybrid switching standard significantly improves the signal-to-noise ratio (SNR) switching threshold deviation of the ACM scheme from 1.8 dB and 4 dB, which were observed in moderate turbulence conditions, to an average of 0.35 dB. This improvement allows for the effective implementation of the ACM scheme in different turbulence intensities at a relatively small cost, thereby enhancing the communication quality of FSO systems in atmospheric channels characterized by turbulent variations.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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