Discrete Cosine Transform based Pilot-Aided Phase Noise Estimation for High-Order QAM Coherent Optical Systems
01 June 2017
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 dual-polarization 128/256 QAM systems.
