电子器件2013，Vol.36Issue(3)：353-358,6.DOI:10.3969/j.issn.1005-9490.2013.03.015
一种克服载波频偏的帧同步新方法
A Novel Approach of Frame Synchronization in Presence of Frequency Offset
摘要
Abstract
This paper studies the frame synchronization methods based on the cross-correlation between received signal and local sequence.When the cartier frequency offset of received signal is large,the peak value of crosscorrelation would decrease significantly compared to that with zero carrier frequency offset.To solve the problem,an approach based on segmental cross-correlation is proposed.It first divides the correlation window into several segments and calculates the correlation value of each segment separately,and then combines these values to get the measure of frame synchronization.The simulation results shows that the approach proposed can detect the start of frame precisely in presence of large carrier frequency offset.Besides,low complexity of realization and high utilization of hardware resource is achieved as it only needs to add a few multipliers and adders to the conventional slide cross-correlator.关键词
帧同步/互相关/载波频偏/相关窗分段/FPGAKey words
frame synchronization/ cross-correlation / carrier frequency offset / division of correlation window/ FPGA分类
信息技术与安全科学引用本文复制引用
杨春,吴毅凌,金野..一种克服载波频偏的帧同步新方法[J].电子器件,2013,36(3):353-358,6.基金项目
国家863计划项目(2011AA01A106) （2011AA01A106）
国家科技支撑计划项目(2011BAH19B01) （2011BAH19B01）
