A full-duplex optical access system with hybrid 64/16/4QAM-OFDM downlink

A full-duplex optical passive access scheme is proposed and verified by simulation, in which hybrid 64/16/4-quadrature amplitude modulation（64/16/4QAM） orthogonal frequency division multiplexing（OFDM） optical signal is for downstream transmission and non-return-to-zero（NRZ） optical signal is for ups...

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Published in:Optoelectronics letters 2016-09, Vol.12 (5), p.361-365
Main Author: 贺超 谭泽富 邵宇丰 蔡黎 蒲鹤升 朱云乐 黄思斯 刘毓
Format: Article
Language:English
Subjects:
Bandwidths
Error correction
Fiber optic communications
Hybrid systems
Lasers
Mach-Zehnder interferometers
OFDM调制
Optical communication
Optical data processing
Optical Devices
Optics
Orthogonal Frequency Division Multiplexing
Photonics
Physics
Physics and Astronomy
Quadrature amplitude modulation
Signal processing
Subcarriers
光纤接入系统
全双工
标准单模光纤
正交幅度调制
正交频分复用
比特错误率
混合
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creator 贺超 谭泽富 邵宇丰 蔡黎 蒲鹤升 朱云乐 黄思斯 刘毓
description A full-duplex optical passive access scheme is proposed and verified by simulation, in which hybrid 64/16/4-quadrature amplitude modulation（64/16/4QAM） orthogonal frequency division multiplexing（OFDM） optical signal is for downstream transmission and non-return-to-zero（NRZ） optical signal is for upstream transmission. In view of the transmitting and receiving process for downlink optical signal, in-phase/quadrature-phase（I/Q） modulation based on Mach-Zehnder modulator（MZM） and homodyne coherent detection technology are employed, respectively. The simulation results show that the bit error ratio（BER） less than hardware decision forward error correction（HD-FEC） threshold is successfully obtained over transmission path with 20-km-long standard single mode fiber（SSMF） for hybrid downlink modulation OFDM optical signal. In addition, by dividing the system bandwidth into several subchannels consisting of some continuous subcarriers, it is convenient for users to select different channels depending on requirements of communication.
doi_str_mv 10.1007/s11801-016-6176-1
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subjects Bandwidths
Error correction
Fiber optic communications
Hybrid systems
Lasers
Mach-Zehnder interferometers
OFDM调制
Optical communication
Optical data processing
Optical Devices
Optics
Orthogonal Frequency Division Multiplexing
Photonics
Physics
Physics and Astronomy
Quadrature amplitude modulation
Signal processing
Subcarriers
光纤接入系统
全双工
标准单模光纤
正交幅度调制
正交频分复用
比特错误率
混合
title A full-duplex optical access system with hybrid 64/16/4QAM-OFDM downlink
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