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Discrete Cosine Transform based Pilot-Aided Phase Noise Estimation for High-Order QAM Coherent Optical Systems

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Abstract

We present a low-complexity, feed-forward pilot-aided phase noise estimation based on discrete cosine transform low pass filter model for high-order QAM signals. The proposed scheme is experimentally demonstrated in 11-Gbaud PDM-128-QAM and PDM-256-QAM systems.

© 2017 Optical Society of America

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