Multi-user optical access system adopting orthogonal amplitude modulation and orthogonal frequency division multiple access

The invention discloses a multi-user optical access system adopting orthogonal amplitude modulation and orthogonal frequency division multiple access, the system adopts an orthogonal frequency division multiple access (OFDMA) technology to perform downlink transmission of a 50Gbit/s orthogonal ampli...

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Bibliographic Details
Main Authors WANG ANRONG, YUAN JIE, SHAO YUFENG, YANG QIMING, YI LINFANG, LI CHONG, LI YANLIN, CHEN PENG, LIU SHUANFAN, ZUO RENJIE, TIAN QING, YU NI
Format Patent
LanguageChinese
English
Published 30.05.2023
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:The invention discloses a multi-user optical access system adopting orthogonal amplitude modulation and orthogonal frequency division multiple access, the system adopts an orthogonal frequency division multiple access (OFDMA) technology to perform downlink transmission of a 50Gbit/s orthogonal amplitude modulation (QAM) signal, 256 subcarriers bearing data are divided into four sub-channels, four paths of 16/32QAM-OFDMA downlink signals are transmitted through a 20km single-mode optical fiber, and then the downlink signals are transmitted through a 20km single-mode optical fiber. And distributing to four users at the optical network unit. A test result shows that the multi-user optical access system provided by the invention has the advantages of a passive optical network (PON) and an orthogonal frequency division multiple access (OFDMA) technology, and can further improve the frequency band utilization rate and increase the multi-user access quantity while providing high-speed, stable and safe data communica
Bibliography:Application Number: CN202211559233