Gao Yuliang, Lau Alan Pak Tao, Yan Shuangyi, Lu Chao
Photonics Research Centre, Department of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
Opt Express. 2011 Oct 24;19(22):21717-29. doi: 10.1364/OE.19.021717.
A low-complexity feed-forward carrier phase estimation (CPE) technique is presented for dual-polarization (DP)-16-QAM transmission systems. By combining QPSK partitioning, maximum likelihood (ML) detection and phase offset estimation between signals in different polarizations, simulation and experimental results for a 200 Gb/s DP-16-QAM system demonstrate similar linewidth tolerance to the best feed-forward CPE reported to date while the computational complexity is at least three times lower compared with other simplified feed-forward CPE techniques.
针对双偏振（DP）-16-QAM传输系统，提出了一种低复杂度前馈载波相位估计（CPE）技术。通过结合QPSK划分、最大似然（ML）检测以及不同偏振信号之间的相位偏移估计，一个200 Gb/s DP-16-QAM系统的仿真和实验结果表明，其线宽容限与迄今报道的最佳前馈CPE相似，而计算复杂度与其他简化前馈CPE技术相比至少低三倍。
