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

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Abstract

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.

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Authors and Affiliations

  1. Key Laboratory of Signal and Information Processing, College of Electronic & Information Engineering, Chongqing Three Gorges University, Wanzhou, 404100, China

    Chao He  (贺超), Ze-fu Tan  (谭泽富), Yu-feng Shao  (邵宇丰), Li Cai  (蔡黎), He-sheng Pu  (蒲鹤升), Yun-le Zhu  (朱云乐), Si-si Huang  (黄思斯) & Yu Liu  (刘毓)

Authors
  1. Chao He  (贺超)
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  2. Ze-fu Tan  (谭泽富)
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  3. Yu-feng Shao  (邵宇丰)
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  4. Li Cai  (蔡黎)
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  5. He-sheng Pu  (蒲鹤升)
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  6. Yun-le Zhu  (朱云乐)
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  7. Si-si Huang  (黄思斯)
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  8. Yu Liu  (刘毓)
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Corresponding author

Correspondence to Chao He  (贺超).

Additional information

This work has been supported by the National Natural Science Foundation of China (No.61107064), the Chongqing University Innovation Team Founding (No.KJTD201320), and the Chongqing Science and Technology Commission Foundation (No.cstc2016jcyjA1233).

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He, C., Tan, Zf., Shao, Yf. et al. A full-duplex optical access system with hybrid 64/16/4QAM-OFDM downlink. Optoelectron. Lett. 12, 361–365 (2016). https://doi.org/10.1007/s11801-016-6176-1

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  • DOI: https://doi.org/10.1007/s11801-016-6176-1

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