相干光通信中的改进型二阶载波相位估计算法  

An Improved Two-Stage Carrier Phase Estimation Algorithm in Coherent Optical Communication

作　　者：赵伦[1] 余建国[1] 王任凡 罗飚 

机构地区：[1]北京邮电大学电子工程学院,北京100876 [2]武汉光迅科技股份有限公司,武汉430205

出　　处：《光通信研究》2016年第6期1-4,共4页Study on Optical Communications

基　　金：国家"八六三"计划资助项目(2015AA016901);国家自然科学基金面上资助项目(61377079)

摘　　要：针对现有的BPS(盲相位搜索)算法计算复杂度过高的问题,提出了一种基于改进型QPSK(正交相移键控)分区算法的二阶载波相位估计算法,该算法的第一阶采用传统基于部分星座点的P3算法进行粗估计,第二阶采用作者提出的改进型QPSK分区算法补偿剩余的相位噪声。仿真结果表明,该算法的性能与BPS算法相近,但计算复杂度较BPS算法降低了约1/13。Aiming at the problem of high computational complexity of existing Blind Phase Search （BPS） algorithm, the thesis proposes a two stage carrier phase estimation algorithm based on improved QPSK partition algorithm. The first stage of the al- gorithm is based on traditional P3 algorithm, which is used to realize rough estimation. The second stage of the algorithm is based on the proposed improved QSPK partition algorithm, which is used to compensate the residual phase noise. The simula- tion results show that the performance of this algorithm is similar to that of BPS algorithm. However, the computational com- plexity is about 13 times lower than that of the BPS algorithm.

关 键 词：相干光通信 载波相位估计 正交相移键控分区 

分 类 号：TN914[电子电信—通信与信息系统]