GNSS信号多径误差非包络评估方法

发布时间：2018-01-12 11:11

本文关键词：GNSS信号多径误差非包络评估方法　出处：《武汉大学学报(信息科学版)》2016年02期 　论文类型：期刊论文

【摘要】：针对全球导航卫星系统(global navigation satellite system,GNSS)信号体制评估过程中,多径误差包络评估方法给出了多径误差的上界,并没有反映反射信号载波和子载波相位引入的码跟踪误差问题,提出了一种码跟踪多径误差非包络评估方法。该方法将反射信号的码相位延时映射到载波和子载波相位延时,为码跟踪多径误差提供了准确的理论值,而且避免了多径误差包络方法求包络曲线的过程。给出了该方法的理论表达式,对BPSK、AltBOC、MBOC和BOC信号进行了多径性能仿真,并与多径误差包络评估方法进行了对比。理论和仿真结果表明,本文方法能准确的估计码跟踪多径误差,为GNSS信号多径误差测量值提供有效的理论指导。
[Abstract]:Evaluation of global navigation satellite system for global navigation satellite system (GNSS). The upper bound of multipath error is given in the method of multi-path error envelope evaluation, which does not reflect the code tracking error caused by carrier and sub-carrier phase of reflected signal. A non-envelope evaluation method for code tracking multipath error is proposed, in which the code phase delay of the reflected signal is mapped to carrier and subcarrier phase delay, which provides an accurate theoretical value for code tracking multipath error. The theoretical expression of the method is given, and the multipath performance of BPSK / AltBOC / MBOC and BOC signals are simulated. The theoretical and simulation results show that the proposed method can accurately estimate the code tracking multipath error and provide effective theoretical guidance for the multipath error measurement of GNSS signals.
【作者单位】：北京航空航天大学电子信息工程学院;
【基金】：国家973计划(2011CB707004) 国家自然科学基金(61101076;41374137;61471017)~~
【分类号】：P228.4
【正文快照】： 在全球卫星导航系统(global navigation sat-ellite system,GNSS)中,多径效应是影响卫星导航接收机测量精度的一个主要误差源,因此在GPS现代化,Galileo导航系统和北斗卫星导航系统(Beidou navigation satellite system,BDS)信号体制设计过程中,信号抗多径性能的评估是信号体制

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