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多径信道下扩频导航信号跟踪性能研究

Keywords: 多径信道 伪码跟踪 跟踪性能

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Abstract:

针对扩频导航信号多径信道下信号跟踪性能,分析了时延小于一个码片的多径信号对导航信号伪码相位和载波相位跟踪误差的影响,并建立跟踪环路的数学模型,在考虑多径信号的基础上分析了混合信号相位跟踪的数学模型,分析了混合信号下伪码跟踪环和载波相位跟踪环相位跟踪的性能.在数学模型分析的基础上,对伪码相位跟踪和载波相位跟踪性能进行了计算机仿真.结果表明,多径信号引入相位测量误差与多径信号的幅度、相埘直达信号伪码相位和载波相位时延有关,并且伪码相位时延与载波相位时延之间相互影响.关键字:多径信道;伪码跟踪;载波跟踪;跟踪性能进行了计算机仿真.结果表明,多径信号引入相位测量误差与多径信号的幅度、相对直达信号伪码相位和载波相痊时延有关,并且伪码相位时延与载波相位时延之间相互影响.

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