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Proceedings Paper

Circle-16QAM for a zero-guard-interval CO-OFDM system
Author(s): Lingyu Kong; Aiying Yang; Peng Guo; Yueming Lu; Yaojun Qiao
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Paper Abstract

In this paper, we introduce circle 16 quadrature amplitude modulation (C-16QAM) modulation format in a high spectral efficiency zero-guard-interval (ZGI) coherent optical (CO) orthogonal frequency-division multiplexing (OFDM) system. At transmitter, the C-16QAM has advantages over the conventional square 16QAM in terms of transmission distance and tolerance to laser linewidth and fiber nonlinearities. ZGI CO-OFDM enables to take away the cyclic prefix (CP), so it has the benefit of higher spectral efficiency compared with the conventional CO-OFDM system. At receiver, in order to compensate chromatic dispersion (CD) and phase noise in a single channel ZGI CO-OFDM system, we studied the overlapped frequency domain equalizer (OFDE) and two carrier phase recovery (CPR) algorithms. We simulate the above systems and the results demonstrate that with the C-16QAM, a 28GBaud ZGI CO-OFDM system can have the longer transmission distance, the higher tolerance to laser linewidth and fiber nonlinearities with contrast to the conventional square 16QAM.

Paper Details

Date Published: 10 January 2018
PDF: 7 pages
Proc. SPIE 10617, 2017 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Optical Signal Processing, 106170C (10 January 2018); doi: 10.1117/12.2295467
Show Author Affiliations
Lingyu Kong, Beijing Univ. of Posts and Telecommunications (China)
Aiying Yang, Beijing Institute of Technology (China)
Peng Guo, Beijing Institute of Technology (China)
Yueming Lu, Beijing Univ. of Posts and Telecommunications (China)
Yaojun Qiao, Beijing Univ. of Posts and Telecommunications (China)


Published in SPIE Proceedings Vol. 10617:
2017 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Optical Signal Processing
Liquan Dong; Yi Dong; Jian Chen; Fabien Bretenaker, Editor(s)

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