相位噪声引起的双向单程测距误差研究  

Research on the phase-noise-induced error in dual one-way ranging

作　　者：陈莉[1] 王跃科[1] 张传胜[1] 

机构地区：[1]国防科学技术大学机电工程与自动化学院,长沙410073

出　　处：《电子测量与仪器学报》2013年第2期99-104,共6页Journal of Electronic Measurement and Instrumentation

基　　金：国防科工局民用航天(C1320061301)资助项目

摘　　要：为了研究时钟相位噪声引起的DOWR测距误差的特性,通过建立时标偏差与相位噪声耦合效应对测距误差的影响模型,得出了测距误差与相位噪声间的频域传递函数和定量关系。以使用时钟OCXO8607的DOWR系统为例,对测距误差进行了功率谱分析和误差水平估计,结果表明导致测距误差的并不是单颗卫星的时标偏差,而是两颗卫星时标偏差之间的差异,并且测距误差与双星时标偏差的差异之间存在近似线性的关系,在使用OCXO8607条件下0.1 s的时标偏差差异将导致约500μm的测距误差,并基于时域的仿真验证了频域分析的结果。In order to study the characteristics of the clock phase-noise-induced ranging error in dual one-way ranging （DOWR）, a model of the coupling effect of time-tag offset and phase noise on the ranging error was built, accordingly a frequency-domain transfer function and a quantitative relationship between ranging error and phase noise were derived. Power spectral analysis and level assessment of the ranging error, which were performed based on a DOWR system adopting OCXO8607, show that it is the discrepancy of the two satellites＇ time-tag offsets, rather than the individual time-tag offset causes the ranging error, and there is a nearly linear relationship between the ranging error and the dis- crepancy of the time-tag offsets, and a discrepancy of 0.1 s will induce a ranging error of about 500 μm with the DOWR system using OCXO8607. The time-domain simulation verified the frequency-domain results.

关 键 词：双向单程测距 相位噪声 时标偏差 耦合效应 测距误差 

分 类 号：TN929.52[电子电信—通信与信息系统]