| 多径效应的动态特性对码跟踪环路的影响分析 |
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| 引用本文： | 刘思慧,樊婧琦,欧钢,焦文海,崔晓伟.多径效应的动态特性对码跟踪环路的影响分析[J].测绘学报,2011(Z1):89-94. |
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| 作者姓名： | 刘思慧 樊婧琦 欧钢 焦文海 崔晓伟 |
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| 作者单位： | 北京跟踪与通信技术研究所;国防科技大学电子科学与工程学院卫星导航研发中心;哈尔滨工业大学;清华大学电子工程系; |
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| 摘 要： | 接收机与卫星之间的相对运动,使得多径效应存在动态特性。针对卫星轨道的不同,分析多径效应对测距误差的影响,着重讨论静止接收机接收GEO卫星信号时出现的固有多径现象,仿真分析多径信号的衰落频率对码跟踪环路的影响。仿真结果表明,当衰落频率接近或大于码环路带宽时,多径对码跟踪精度的影响会在一定程度上被滤除;不同的卫星轨道导致多径效应的动态特性存在差异,会使测距误差在时域上表现出短时快变和长时缓变两种特征。为研究多径效应产生机理与卫星轨道因素的相关性提供了验证途径。
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| 关 键 词： | 多径 衰落频率 接收机 码跟踪环路 |
Effects of Dynamics of Multipath on Code Tracking Loop |
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| LIU Sihui,FAN Jingqi,OU Gang,JIAO Wenhai,CUI Xiaowei.Effects of Dynamics of Multipath on Code Tracking Loop[J].Acta Geodaetica et Cartographica Sinica,2011(Z1):89-94. |
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| Authors: | LIU Sihui FAN Jingqi OU Gang JIAO Wenhai CUI Xiaowei |
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| Institution: | LIU Sihui1,3,FAN Jingqi2,OU Gang3,JIAO Wenhai1,CUI Xiaowei4 1.Beijing Institute of Tracking and Telecommunication Technology,Beijing 100094,China,2.Harbin Institute of Technology,Harbin,150001,3.Satellite Navigation R&D Center,School of Electronic Science and Engineering,National University of Defense Technology,Changsha Hunan,410073,4.Department of Electronic Engineering,Tsinghua University,Beijing,100084 |
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| Abstract: | The relative movement between the receiver and the satellite causes the dynamic effect on multipath.As to different orbits of satellites,this paper firstly analyzes the different effects of multipath to the error of pseudorange measurement.The standing multipath of static receiver is discussed especially when receiving the signals from the GEO satellites.Then influence to the code tracking loop,which is caused by fading-frequency in multipath,is simulated and analyzed in the paper.Further results show that ... |
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| Keywords: | multipath fading-frequency receiver code tracking loop |
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