An improved multiplier-free feed-forward carrier phase estimation for dual-polarization QPSK modulation format  

作　　者：钟康平 李唐军 贾楠 孙剑 王目光 

机构地区：[1]State Key Laboratory of All Optical Network & Advanced Telecommunication Network,Beijing Jiaotong University [2]Institute of Lightwave Technology,Beijing Jiaotong University

出　　处：《Optoelectronics Letters》2013年第4期305-308,共4页光电子快报（英文版）

基　　金：the National Natural Science Foundation of China (No.61275052);the National High-Tech Research and Development Program of China (No.2007AA01Z258);the Fundamental Research Funds for the Central Universities (No.2009YJS005);the Major State Basic Research Development Program of China (No.2010CB328206);the Beijing Nova Program (No.2008A026)

摘　　要：An improved multiplier-free feed-forward carrier phase estimation algorithm is proposed for dual-polarization quad-rature-phase-shift-keying (DP-QPSK) with coherent detection. The bit error rate (BER) performance, block length effect and linewidth tolerance of the proposed algorithm are evaluated for a 112 Gbit/s DP-QPSK system. A linewidth symbol duration product of 2.9×10-4 is demonstrated for 1 dB optical signal-to-noise-ratio (OSNR) penalty at BER of 10-3 for the proposed algorithm. The hardware complexity of the proposed multiplier-free algorithm is demonstrated to be much lower than that of the 4th power algorithm.An improved multiplier-free feed-forward carrier phase estimation algorithm is proposed for dual-polarization quadrature-phase-shift-keying （DP-QPSK） with coherent detection. The bit error rate （BER） performance, block length effect and linewidth tolerance of the proposed algorithm are evaluated for a 112 Gbit/s DP-QPSK system. A linewidth symbol duration product of 2.9× 10^-4 is demonstrated for l dB optical signal-to-noise-ratio （OSNR） penalty at BER of 10-3 for the proposed algorithm. The hardware complexity of the proposed multiplier-free algorithm is demonstrated to be much lower than that of the 4th power algorithm.

关 键 词：载波相位估计 QPSK系统 乘法器 调制格式 前馈 双极化 估计算法 正交相移键控 

分 类 号：TN761[电子电信—电路与系统]