Full-duplex free space optical access system for 67% downlink PAM4 signal and uplink AMI signal

The invention discloses a full-duplex free space optical access system for 67% downlink PAM4 signals and uplink AMI signals, the transmission rate and the distance of the system are 1.5 Gbit/s and 100m respectively, and 6GHz sine subcarriers are introduced into an uplink and a downlink for frequency...

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Main Authors WANG ANRONG, YUAN JIE, SHAO YUFENG, YANG QIMING, YI LINFANG, LI YANLIN, LI CHONG, ZUO RENJIE, LIU SHUANFAN, CHEN PENG, TIAN QING, YU NI
Format Patent
LanguageChinese
English
Published 06.06.2023
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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Summary:The invention discloses a full-duplex free space optical access system for 67% downlink PAM4 signals and uplink AMI signals, the transmission rate and the distance of the system are 1.5 Gbit/s and 100m respectively, and 6GHz sine subcarriers are introduced into an uplink and a downlink for frequency mixing so as to extract clock signals. Compared with the existing free space optical access system scheme, the receiving and transmitting quality of the FSO access system and the flexibility of wireless optical network access are improved to a certain extent; test results prove that according to the scheme provided by the invention, a 67% RZ-PAM4 signal is adopted for downlink, so that the frequency band utilization rate can be remarkably improved, and the RZ realizes the time synchronization of the signal in the transmission process by extracting a clock; the uplink adopts an AMI with error detection capability to effectively resist a direct current component generated by signal transmission, and the downlink and
Bibliography:Application Number: CN202211559246