一种适用于高阶QAM信号的均衡与载波恢复联合实现算法  

Joint Design of Equalization and Carrier Recovery for High-Order QAM

作　　者：杨宾[1] 吴瑛[1] 

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《信息工程大学学报》2015年第3期339-344,共6页Journal of Information Engineering University

摘　　要：针对高阶QAM信号接收解调中的均衡和载波恢复问题,提出了一种基于超指数迭代的均衡与载波恢复联合处理算法,在存在载波频偏情况下,联合实现盲均衡和载波恢复。利用超指数迭代算法对载波相位"盲"的性质及其快速收敛特性,与极性判决锁相环联合实现多径信道条件下的载波频偏捕获及初步均衡,之后切换到判决引导方式完成载波的相位跟踪和最终均衡。仿真结果证明了算法的有效性。A joint algorithm based on super-exponential iteration is proposed for equalization and car- rier recovery of high-order qam. It jointly implements blind equalization and carrier recovery with carrier frequency offset existed. Owing to the carrier phase ＂blind＂ nature and the fast convergence of super-exponential iteration, the algorithm combines it with polarity decision phase-locked loop to implement carrier frequency offset capture and primary equalization in muhipath channels, and then switches to the decision direct manner to achieve carrier phase tracking and final equalization. Simu- lation results show the effectiveness of the joint algorithm.

关 键 词：均衡 载波恢复 超指数迭代 极性判决锁相环 正交幅度调制 

分 类 号：TN914.3[电子电信—通信与信息系统]