| 摘要: |
| 为了解决低信噪比条件下载波频偏估计中估计范围和估计精度的矛盾，在比较分析
现有经典估计方法的基础上，提出了一种改进的Fitz载波频偏估计方法，利用自相关序列
差
分代替自相关序列相位估计频偏。此方法将频偏估计范围提高到数据速率的一半，同时又保
持了原有Fitz方法的低信噪比门限。通过仿真验证了改进频偏估计方法对大频偏和低信噪比
的适用性。 |
| 关键词: 载波同步 频偏估计 大频偏 低信噪比 数据辅助 |
| DOI： |
|
| 基金项目: |
|
| An improved Fitz carrier frequency offset estimation algorithm and simulation |
| MENG Qing-ping,ZHOU Xin-li,TIAN Wei |
| () |
| Abstract: |
| In order to solve the problem of the contradiction between capturing r
ange and estimation accuracy of frequency offset estimation methods for low sign
al to noise ratio (SNR) condition,an improved Fitz frequency offset estimation
method is proposed.The phase of autocorrelation sequence is replaced with autoco
rrelation sequence difference to estimate frequency offset. The improved estimat
ion method extends its estimation range to a half data rate, at the meantime, it
s SNR threshold is as low as the Fitz method.The applicability of the improved m
ethod for large frequency offset and low SNR is verified by simulation. |
| Key words: carrier synchronization frequency offset estimation large frequency offset low
SNR data aid |
《电讯技术》编辑部 