摘要
针对通信接收中的载波频率同步问题,提出一种改进的载波频差估计算法。分析了在常用的基于最大似然准则的频差估计方法中,估计范围受限的原因,针对性地提出了改进方法,利用一个基于频差粗估计的频率搬移方法扩展了估计范围,同时保持了L&R算法的估计精度优势。给出了改进算法的实现步骤,通过仿真实验证明了算法的有效性。
An improved carrier frequency offset estimator for carrier frequency synchronization is proposed. The factors that limit the frequency range of the ML estimator are discussed. The frequency range is then extended via frequency shifting that is based on a coarse estimator. The algorithm is described in detail Simulation results illustrating the performances are also given.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2006年第3期369-371,共3页
Systems Engineering and Electronics
关键词
同步
载渡频率
频差估计
信号处理
synchronization
carrier recovery
frequency offset estimation, signe proccssing
