Trung-Hien Nguyen, M. Joindot, M. Gay, L. Bramerie, J. Simon, P. Scalart, O. Sentieys
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Carrier frequency offset estimation based on circular harmonic expansion for optical coherent M-QAM communication systems
Circular harmonic expansion-based carrier frequency offset estimation is investigated for optical M-QAM communication systems. The proposed method, combined with a gradient-descent algorithm, shows better performance compared to already proposed VVMFOE and 4th power methods.
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