摘要
针对无线数字通信中的载波频偏估计问题,提出一种改进的Rife算法。分析了在Rife算法中估计精度不高的原因,提出了改进方法。利用Rife算法得到频率粗估计,利用自相关函数法得到精估计的方法,只以一定复杂度的代价,提高了Rife算法的估计精度,同时保持了Rife算法估计范围广和复杂度低的优势。给出了改进算法的实现步骤,通过MATLAB仿真实验证明了算法的有效性。
An improved Rife algorithm is proposed for carrier frequency offset estimation in wireless digital communications. To overcome the disadvantage that Rife algorithm accuracy is not high, an improved method is proposed. Firstly, Rife algorithm is used to obtain a coarse estimation, then autoeorrelation function algorithm is used to obtain the refined estimation. This method improves the estimation accuracy of the Rife algorithm only at cost of a certain complexity. Lastly,this paper gives the improved algorithm implementation steps,and the MATLAB simulation experiments prove the effectiveness of the algorithm.
出处
《无线电工程》
2013年第2期30-33,37,共5页
Radio Engineering
关键词
载波同步
频偏估计
突发同步
Rife算法
carrier synchronization
frequency offset estimation
burst synchronization
Rife algorithm
