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卫星导航信号畸变导致的测距偏差的估计方法
引用本文:刘建成,范建军,冯晓超,桑怀胜. 卫星导航信号畸变导致的测距偏差的估计方法[J]. 宇航学报, 2015, 36(11): 1296-1302. DOI: 10.3873/j.issn.1000-1328.2015.11.011
作者姓名:刘建成  范建军  冯晓超  桑怀胜
作者单位:北京卫星导航中心,北京100094
摘    要:为定量评估导航信号的测距性能,本文研究了在轨卫星导航信号畸变导致的测距偏差估计问题。基于Vernier采样原理利用大口径抛物面天线采集在轨卫星导航信号,经数据处理获得一个伪码周期的脉冲波形。在此基础上,对该波形起点位置进行精确估计,然后根据延迟锁定环工作原理产生超前本地波形和滞后本地波形,获得E-L鉴别器曲线,最后估计鉴别器曲线的零交叉点偏差,该偏差即为卫星导航信号畸变导致的测距偏差。利用北斗卫星采集信号,获得了B1频点I支路信号的测距偏差,验证了该估计方法的正确性。

关 键 词:信号质量监测  定量评估  鉴别器  测距偏差  
收稿时间:2014-07-27

Estimation Method of Ranging Bias Caused by Navigation Satellite Signal Distortion
LIU Jian cheng,FAN Jian jun,FENG Xiao chao,SANG Huai sheng. Estimation Method of Ranging Bias Caused by Navigation Satellite Signal Distortion[J]. Journal of Astronautics, 2015, 36(11): 1296-1302. DOI: 10.3873/j.issn.1000-1328.2015.11.011
Authors:LIU Jian cheng  FAN Jian jun  FENG Xiao chao  SANG Huai sheng
Affiliation:Beijing Satellite Navigation Center, Beijing 100094,China
Abstract:For quantitative evaluation of signal quality, a ranging bias estimation method of in-orbit satellite signals is proposed. Based on Vernier sampling, a large diameter parabolic antenna is used for in-orbit satellite signal collection, and a clear waveform for one code epoch is achieved after data processing. Base on the clear waveform, it’s starting point position estimation is made. According to the working principle of delay locked loop, leading signal and delay signal are produced to obtain E-L discriminator curve, then zero crossing bias is achieved through linear fitting, which is the ranging bias caused by signal distortion. Using the collected signal of one COMPASS satellite, the ranging bias of I channel of B1 band is obtained, so the estimation method is verified.
Keywords:Signal quality monitoring   ,Quantitative evaluation   ,Discriminator   ,Ranging bias,
本文献已被 CNKI 等数据库收录!
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