一种基于频率预校正的加窗数字匹配滤波捕获方法  

A Windowed Digital Matched Filter Acquisition Method Based on Frequency Pre-correction

作　　者：刘冬梅 王孙龙 LIU Dong-mei;WANG Sun-long(Science and Technology on Communication Information Security Control Laboratory,Jiaxing Zhejiang 314033,China;No.36 Research Institute of CETC,Jiaxing Zhejiang 314033,China)

机构地区：[1]通信信息控制和安全技术重点实验室,浙江嘉兴314033 [2]中国电子科技集团公司第三十六研究所,浙江嘉兴314033

出　　处：《通信对抗》2021年第3期13-16,26,共5页Communication Countermeasures

摘　　要：针对扩频通信系统,介绍了数字匹配滤波(DMF)捕获方法,分析了频偏对匹配滤波器的影响,进而从减小频偏角度和降低DMF对频偏的敏感度角度,提出了一种基于频率预校正的加窗数字匹配滤波捕获方法,此方法在FPGA上得到了实现并成功捕获了某卫星移动通信系统通信信号。In view of the spread spectrum communication system,this paper introduces the acquisitionmethodofdigital matched filter(DMF)、analysesthe influence of frequency offset on digital matched flter,and then proposes a windowed digital matched flter acquisition method based on frequency pre-correction.This method reduces the frequency offset and the sensitivity of DMF to it.This methodimplemented with FPGA successfully captured the signal of a satellite mobile communication system.

关 键 词：数字匹配滤波 捕获 频偏 FPGA 

分 类 号：TN914.42[电子电信—通信与信息系统]