GPS接收机抗多径技术研究现状与趋势  

Research Status and Trend of Mitigating Multipath Effects Technology for GPS Receiver

作　　者：王尔申[1] 张淑芳[2] 张芝贤[1] 

机构地区：[1]沈阳航空航天大学电子信息工程学院,沈阳110136 [2]大连海事大学信息科学技术学院,辽宁大连116026

出　　处：《电讯技术》2011年第1期114-119,共6页Telecommunication Engineering

基　　金：国家高技术研究发展计划(863计划)资助项目(2009AA12Z312);辽宁省博士启动基金资助项目(20101081)~~

摘　　要：多径在GPS接收机设计中是最显著的误差源,它能引起接收机定位精度的恶化,导致系统性能的下降。首先介绍了多径的影响及多径误差模型;然后,对国内外抑制多径的技术研究进行了综述,归纳为基于空域处理和基于时域处理两大类抑制技术,并对基于Rake分集思想提高卫星导航接收机性能的新颖方法进行了讨论,给出了各种技术的优缺点;最后,讨论了抗多径技术的研究方向。As the most prominent error source of GPS receiver, muhipath causes the deterioration of the positioning precision and results in the impairment of the GPS system performance. First, the influence of multipath effects and the model of muhipath error are analysed. Then, the existing methods of mitigating multipath effects are summarized and assorted two categories, including the time - domain processing and frequency - domain processing technology. And then, several novel methods for improving the performance of GPS receiver are discussed by means of employing a modified ＂Rake＂ receiver structure in GPS receiver. Their merits and demerits are respectively shown. Finally, further research directions in this area are also pointed out.

关 键 词：GPS接收机 多径效应 空域处理 时域处理 Rake分集 

分 类 号：TN967.1[电子电信—信号与信息处理]