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

被引：2
|
作者：
He C. [1 ]
Tan Z.-F. [1 ]
Shao Y.-F. [1 ]
Cai L. [1 ]
Pu H.-S. [1 ]
Zhu Y.-L. [1 ]
Huang S.-S. [1 ]
Liu Y. [1 ]
机构：
[1] Key Laboratory of Signal and Information Processing, College of Electronic & Information Engineering, Chongqing Three Gorges University, Wanzhou
来源：
Optoelectronics Letters | 2016年 / 12卷 / 5期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1007/s11801-016-6176-1
中图分类号：
学科分类号：
摘要：
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. © Tianjin University of Technology and Springer-Verlag Berlin Heidelberg 2016.
引用
收藏
页码：0361 / 0365
页数：4
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