Modulation-Format-Independent Carrier Phase Estimation for Square M-QAM Systems

  title={Modulation-Format-Independent Carrier Phase Estimation for Square M-QAM Systems},
  author={Yuliang Gao and A. P. T. Lau and Chao Lu},
  journal={IEEE Photonics Technology Letters},
A modulation-format-independent or universal carrier phase estimation (U-CPE) technique is proposed for square 4-, 16-, and 64-ary quadrature amplitude modulation transmission systems for future elastic optical networks. The proposed U-CPE is based on a feedback architecture and eliminates the need to know the signal modulation format (MF) by using a cost function in the phase estimation update that is common to all square-shaped constellations. Compared with standard decision directed phase… CONTINUE READING