一种数据辅助的载波频差估值算法  

A Data-aided Algorithm of Carrier Frequency Offset Estimation

作　　者：邢观斌[1] 沈伯弘[1] 项海格[1] 

机构地区：[1]北京大学电子学系,北京100871

出　　处：《通信学报》1999年第12期54-58,共5页Journal on Communications

摘　　要：在许多频率估值算法中，估值范围和估值精度是难以同时兼顾的一对矛盾。本文通过对这一问题进行分析，提出了一种具有高性能和低复杂度的估值算法。仿真结果表明，对于数据辅助的ＢＰＳＫ，在Ｅｂ／Ｎ０＞ ０ｄＢ时，本算法的频差估值范围为符号速率的±４０％ ，估值方差接近克拉美—劳界（ＣＲＢ），与文献［２］提出的算法相比，在相同的性能下，其硬件实现代价减小了３～５The demand for a wide estimation range and an accurate estimation are always uncompatible in many frequency estimation algorithms.In this paper,this problem is fully analyzed and a new solution with high performance and easy implementation is proposed.Computer simulation shows that in the condition of data aided BPSK with E b/ N 0 higher than 0dB,its estimation range is about ±40% of symbol rate and its accuracy is close to the Cramer Rao bound(CRB).Having the same performance as the algorithm proposed in reference [2] ,its complexity is reduced to 1/3～1/5 of the former one.

关 键 词：极大似然估计 频率估计 载波 算法 数字通信系统 

分 类 号：TN914.3[电子电信—通信与信息系统]