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Proceedings Paper

A novel joint frequency offset and channel estimation method for CO-OFDM system
Author(s): Zhansheng Wang; Yaojun Qiao; Yuefeng Ji
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Paper Abstract

We investigate the problem of joint frequency offset and channel estimation for an 112Gbit/s QPSK CO-OFDM system. The paper presents a novel joint frequency offset and channel estimation method based on CP and training symbols. It is able to estimate the fractional part and integral part of frequency offset at the same time. Its estimation range is more than[-2,5 GHz,2.5 GHz] .Meanwhile, we present an efficient CD estimation and compensation method for CO-OFDM based on training symbol time-domain averaging (TSTA) and systematically investigate its robustness against transmission impairments such as the nonlinearity of MZ modulator, linewidth and frequency offset of laser. Simulation results indicate that even OSNR is very low, it estimates frequency offset and channel response very well.

Paper Details

Date Published: 18 February 2011
PDF: 12 pages
Proc. SPIE 7988, Optical Transmission Systems, Switching, and Subsystems VIII, 79881J (18 February 2011); doi: 10.1117/12.888573
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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