一种基于Rake结构的GNSS多径信号捕获方法  

GNSS multipath signal acquisition method based on Rake architecture

作　　者：孙晓文[1] 张淑芳[1] 姜毅[1] 胡青[1] 

机构地区：[1]大连海事大学信息科学与技术学院,大连116026

出　　处：《仪器仪表学报》2010年第12期2854-2860,共7页Chinese Journal of Scientific Instrument

基　　金：国家863计划(2009AA12Z312);国家自然科学基金(60972091)资助项目

摘　　要：为了提高多径环境下的GNSS接收机性能,在GNSS接收机设计中引入Rake结构,提出一种基于Rake结构的多径信号捕获方法。首先对GNSS系统中的多径信号特性及其对接收机性能的影响进行了分析。然后,在此基础上阐述基于Rake结构的GNSS多径信号捕获方法原理,并给出该方法的具体实现过程。最后,通过仿真实验证明了该方法对GNSS信号中的多径成分具有有效的捕获能力,将该方法用于GNSS接收机后可以显著提高接收机的定位精度。A GNSS multipath signal acquisition method based on Rake architecture is proposed,Rake architecture is introduced into GNSS receiver to improve its performance in multipath environment.Based on the analysis of GNSS multipath characteristics and their impact on receiver performance,the acquisition principle of GNSS multipath signals based on Rake architecture is described,and then its detail realization process is given.Simulation results show that GNSS multipath signals can be acquired effectively with this method and the positioning accuracy can be greatly improved when the method is used in GNSS receiver.

关 键 词：全球导航卫星系统 GNSS接收机 RAKE 多径信号 捕获 快速傅里叶变换 

分 类 号：TN965[电子电信—信号与信息处理]