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３～５
The 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.
出处
《通信学报》
EI
CSCD
北大核心
1999年第12期54-58,共5页
Journal on Communications
关键词
极大似然估计
频率估计
载波
算法
数字通信系统
maximum likelihood estimation,frequency estimation,carrier synchronization
