基于广义延拓逼近的GPS卫星信号多普勒频移估计方法  

Doppler shift estimation method of GPS satellite signals based on generalized extended approximation

作　　者：唐青松 王兆瑞[2] TANG Qingsong;WANG Zhaorui(University of Chinese Academy of Sciences,Beijing 100012,China;National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,China)

机构地区：[1]中国科学院大学,北京100012 [2]中国科学院国家天文台,北京100012

出　　处：《现代电子技术》2018年第7期24-28,共5页Modern Electronics Technique

基　　金：利用iHCO通信卫星实现导航通信的关键技术研究(11573041)~~

摘　　要：对并行码相位捕获GPS卫星信号时多普勒频移的栅栏效应进行研究。为了减小栅栏效应的影响,提高多普勒频移的捕获精度,提出用广义延拓逼近法来提高多普勒频移的估计精度,并在不增加算法运算量的基础上,对此方法进行优化,进一步降低了噪声对捕获多普勒频移精度的影响,仿真结果验证了该方法的有效性。The picket-fence effect of Doppler shift when the parallel code phase is utilized to capture the GPS satellite signal is studied.In order to reduce the influence of picket?fence effect and improve the acquisition precision of Doppler shift,a generalized extended approximation method is proposed to improve the estimation accuracy of Doppler shift.The method is optimized while maintaining the algorithm computation amount to further reduce the impact of noise on the acquisition accuracy of Doppler shift.The simulation results verify that the method is effective.

关 键 词：栅栏效应 多普勒频移 广义延拓逼近 GPS 卫星信号 捕获精度 

分 类 号：TN911.7-34[电子电信—通信与信息系统]