Projection Histogram-Assisted Estimation of Common Phase Error in Coherent Optical OFDM Systems Li, Zhengxuan ; Li, Yun ; Ma, Junjie ; Chen, Jian ; Song, Yingxiong ; Wang, Min Abstract Publication: IEEE Photonics Journal Pub Date: June 2019 DOI: 10.1109/JPHOT.2019.2921410 Bibcode: 2019IPhoJ..1121410L