基于互相关差分的多普勒频率估计算法  

Doppler Frequency Estimation Algorithm Based on Cross-correlation Differential

作　　者：王奉帅 王华青 董仁智 王晔 WANG Fengshuai;WANG Huaqing;DONG Renzhi;WANG Ye(The 54th Research Institute of CETC,Shijiazhuang 050081,China;Zhongke Hengyun Co. ,Ltd. ,Shijiazhuang 050000,China;University of Electronic Science and Technology of China,Chengdu 611731,China;Unit 95861,PLA,Jiuquan 735018,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]中科恒运股份有限公司,河北石家庄050000 [3]电子科技大学,四川成都611731 [4]中国人民解放军95861部队,甘肃酒泉735018

出　　处：《无线电工程》2020年第3期214-218,共5页Radio Engineering

基　　金：室内混合智能定位与室内GIS技术(2016YFB0502100)~~

摘　　要：在全球卫星导航系统中,精确的多普勒频率估计可以减少接收机从信号捕获到信号跟踪的时间,很大地提升了导航接收机的性能。针对导航信号的多普勒频率估计,在修正差分组合算法基础上,提出了一种基于互相关差分的多普勒频率估计算法,该算法不需要估计载频就能够直接估算出多普勒频率,在不增加搜索空间的前提下,明显提升了多普勒频率的估计精度。In Global Navigation Satellite System(GNSS),precise Doppler frequency estimation can reduce the time from signal acquisition to signal tracking for the receiver and greatly improve the performance of GNSS receiver.In view of the Doppler frequency estimation of navigation signals,a Doppler frequency estimation algorithm based on cross-correlation differential is proposed on the basis of modified differential combination algorithm.This algorithm can directly estimate the Doppler frequency without estimating the carrier frequency,and the estimation accuracy of Doppler frequency is obviously improved without increasing the search space.

关 键 词：捕获跟踪 多普勒频率估计 差分处理 

分 类 号：TN961[电子电信—信号与信息处理]