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Proceedings Paper

The structure design and analysis of OFDM symbol in CO-OFDM system
Author(s): Zhansheng Wang; Yaojun Qiao; Yuefeng Ji
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Paper Abstract

The structure of OFDM symbol has great influence on the performance of coherent optical orthogonal frequency division multiplexing (CO-OFDM) system. We present, for the first time, a typical structure of OFDM symbol with zero padding and pilots for CO-OFDM. Virtual subcarriers is used for guard band and eliminating the impact of DC and low frequency subcarriers. Pilots are intended to track the channel variation and compensate for phase noise. Simulation results indicate that CO-OFDM system with this structure is more resistant to the influence of optical carrier, MZ modulator, linewidth, frequency offset than the system without zero padding. It is also found that 32 pilots are enough in one OFDM symbol. Furthermore, the proposed structure is very suitable for frequency offset compensation. Using the structure, performance of CO-OFDM is improved largely.

Paper Details

Date Published: 18 February 2011
PDF: 8 pages
Proc. SPIE 7988, Optical Transmission Systems, Switching, and Subsystems VIII, 798826 (18 February 2011); doi: 10.1117/12.888569
Show Author Affiliations
Zhansheng Wang, Beijing Univ. of Posts and Telecommunications (China)
Yaojun Qiao, Beijing Univ. of Posts and Telecommunications (China)
Yuefeng Ji, Beijing Univ. of Posts and Telecommunications (China)


Published in SPIE Proceedings Vol. 7988:
Optical Transmission Systems, Switching, and Subsystems VIII
Yikai Su; Ernesto Ciaramella; Xiang Liu; Naoya Wada, Editor(s)

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