频偏估计中一种移除调制相位信息的算法  

An Algorithm for the Removal of Modulated Phase in Frequency Offset Estimation

作　　者：白晓杰[1] 白夫文[1] 林通[1] 李海涛 黄丽艳 韩纪龙 BAI Xiao-jie BAI Fu-wen LIN Tong LI Hai-tao HUANG Li-yan HAN Ji-long(State Grid Information and Telecommunication Brand, Beijing 100761, China Accelink Technologies Co. ,Ltd. ,Wuhan 430205,China)

机构地区：[1]国家电网公司信息通信分公司,北京100761 [2]武汉光迅科技股份有限公司,武汉430205

出　　处：《光通信研究》2017年第1期16-18,共3页Study on Optical Communications

摘　　要：对一种移除调制相位信息的算法进行了进一步研究,使其适用于更高阶调制格式的相干系统。该算法对接收到的复数信号的实部和虚部分别采用绝对值操作,移除调制的相位信息。通过对28GBaud的64QAM(64阶正交幅度调制)相干系统进行仿真,来研究该算法在64QAM系统中的性能。仿真结果表明,该算法无需乘法器,而且在频偏估计中的性能与传统的M次幂运算的性能接近。因此,该算法相比M次幂运算在性能不变的情况下,降低了算法的复杂度。An algorithm to remove the modulated phase is further investigated to make the algorithm be suitable for the coherent systems of higher-order modulation format.In the algorithm,the absolute operation is respectively implemented on the real part and imaginary part of received complex signals to remove their modulated phases.The performance of the proposed algorithm in a 28 GBaud coherent 64 ary Quadrature Amplitude Modulation（64QAM）system is investigated through simulation.The simulation results show that the proposed algorithm requires no multiplier and reaches the approximate performance as the Mth-power operation in the frequency offset estimation.Therefore,the algorithm reduces the complexity with similar performance compared with Mth-power operation.

关 键 词：相干光通信 频偏估计 M次幂运算 相位信息移除 

分 类 号：O436[机械工程—光学工程]