A Novel 64 QAM-OFDM Optical Access System Based on Bit Reconstruction

Author:

Xie Rongzhen1,Wu Di1,Zhang Qi123ORCID,Yao Haipeng123ORCID,Wang Xishuo1,Xin Xiangjun4,Tian Feng123,Tian Qinghua123ORCID,Wang Fu123,Wang Yongjun123,Yang Leijing123,Jiang Jinkun1

Affiliation:

1. School of Electronic Engineering, Beijing University of Posts and Telecommunications (BUPT), Beijing 100876, China

2. Beijing Key Laboratory of Space-Ground Interconnection and Convergence, BUPT, Beijing 100876, China

3. State Key Laboratory of Information Photonics and Optical Communications, BUPT, Beijing 100876, China

4. The Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China

Abstract

This paper proposes a novel orthogonal frequency division multiplexing (OFDM) optical access scheme based on bit reconstruction. In this method, correlation is introduced into the data information of optical line terminals (OLT) through the logical coding circuits and partition mapping. Even after passing through the optical fibre channel, the strong correlation after bit reconstruction can still be used in the optical network unit (ONU) for reliable decoding. In the simulation experiments, a 60 Gbit/s bit reconstruction 64 quadrature amplitude modulation (QAM) OFDM signal was successfully transmitted over a 10/20 km single-mode fibre (SMF). The simulation results show that the proposed scheme can effectively achieve reliable transmission with gains of about 1.3 dB and 0.51 dB at a 20% soft decision-forward error correction (SD-FEC) threshold, respectively. The proposed scheme is a promising candidate for a next-generation passive optical network (NGPON) solution.

Funder

National Natural Science Foundation of China

Funds for Creative Research Groups of China

Publisher

MDPI AG

Subject

Radiology, Nuclear Medicine and imaging,Instrumentation,Atomic and Molecular Physics, and Optics

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