| 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。 |
| 关键词: GPS接收机 多径效应 空域处理 时域处理 Rake分集 |
| DOI： |
|
| 基金项目: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) |
|
| Research Status and Trend of Mitigating Multipath Effects Technology for GPS Receiver |
| WANG Er-shen,ZHANG Shu-fang,ZHANG Zhi-xian |
| (School of Electronic and Information Engineering,Shenyang Aerospace Universi
ty,Shenyang 110136,China;Information Science and Technology College,Dalia
n Maritime University,Dalian 116026,China) |
| Abstract: |
| As the most prominent error source of GPS receiver,multipath cause
s the deterioration of the positioning precision and results in the impairment o
f the GPS system performance. First, the influence of multipath effects and the
model of multipath error are analysed. Then, the existing methods of mitigatin
g multipath effects are summarized and assorted two categories, including the ti
me-domain processing and frequency-domain processing technology. And then,severa
l novel methods for improving the performance of GPS receiver are discussed by m
eans of employing
a modified “Rake” receiver structure in GPS receiver. Their merits and demeri
ts are respectively shown. Finally, further research directions in this area are
als
o pointed out. |
| Key words: GPS receiver multipath effect spatial domain processing ti
me domain processing Rake diversity |
