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Data-aided linear fitting blind phase estimation method for coherent optical OFDM system

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Abstract

In this paper, a novel data-aided linear fitting-based (DALF-based) blind phase estimation method for coherent optical orthogonal frequency-division multiplexing (CO-OFDM) is proposed. Similar to our previous work done in the pilot-based blind phase estimation method, the pilot subcarriers are used to transmit unknown amplitude modulation signals in order to improve spectral efficiency. But the so-called pilot subcarriers can be reduced to only two in the DALF-based method, while the conventional pilot-aided-based (PA-based) method requires almost four real pilot subcarriers. A performance comparison of the conventional PA-based and DALF-based phase estimation methods has been demonstrated through a 16-QAM CO-OFDM simulation. The results show that the performance of the proposed DALF-based method is better than the conventional one with higher SE and has the potential in the large capacity CO-OFDM systems.

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Acknowledgments

We would like to acknowledge the National Natural Science Foundation of China (NSFC) (Grant Nos. 61435006, 61307092) and the Program for New Century Excellent Talents in University (NCET-12-0679) in China.

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Authors and Affiliations

  1. Institute of Photonics Technology, Jinan University, Guangzhou, 510632, Guangdong Province, People’s Republic of China

    Man Pan, Xuebing Zhang, Jianping Li & Zhaohui Li

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  1. Man Pan
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  2. Xuebing Zhang
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  3. Jianping Li
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  4. Zhaohui Li
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Correspondence to Zhaohui Li.

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Pan, M., Zhang, X., Li, J. et al. Data-aided linear fitting blind phase estimation method for coherent optical OFDM system. Photon Netw Commun 31, 316–320 (2016). https://doi.org/10.1007/s11107-015-0565-4

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  • DOI: https://doi.org/10.1007/s11107-015-0565-4

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