Research on full duplex FSO access system with hybrid 16PSK/256QAM-OFDM downlink and duobinary uplink signals

a 100Gbit/s novel full duplex free space optical (FSO) access system scheme is proposed and demonstrated. Using the downlink hybrid 16phase shift keying (PSK)/256quadrature amplitude modulation (QAM)-orthogonal frequency division multiplexing (OFDM) and duobinary uplink signals. In downlink branch,...

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Published inOptics communications Vol. 550; p. 129956
Main Authors Shao, Yufeng, Yu, Ni, Wang, Anrong, Tian, Qing, Yi, Linfang, Yang, Qiming, Li, Yanlin, Liu, Shuanfan, Yuan, Jie, Zuo, Renjie, Chen, Peng, Li, Chong
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.01.2024
Subjects
16PSK/256QAM-OFDM
BER
Duobinary
FSO
Full-duplex
FSO
16PSK/256QAM-OFDM
BER
Full-duplex
Duobinary
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Summary:a 100Gbit/s novel full duplex free space optical (FSO) access system scheme is proposed and demonstrated. Using the downlink hybrid 16phase shift keying (PSK)/256quadrature amplitude modulation (QAM)-orthogonal frequency division multiplexing (OFDM) and duobinary uplink signals. In downlink branch, in-phase/quadrature-phase (I/Q) modulation based on Mach-Zehnder modulator (MZM) and coherent detection technology are adopted. Meanwhile, 0.1Terahertz (THz) wave signal generated by two independent optical sidebands beating frequency at positive intrinsic-negative photodiodes (PIN PDs) for hybrid downlink 16PSK/256QM-OFDM signals. In uplink branch, intensity modulation and direct detection (IM/DD) can achieve reduced the communication budget cost and simplified the system configuration Simulation results show that the value of bit error ratio (BER) less than hardware decision forward error correction (HD-FEC) threshold after 300 m FSO channel transmission under the different weather conditions (such as sunny, rainy and snow).
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2023.129956