›› 2011, Vol. 31 ›› Issue (4): 30-37.doi: 10.3780/j.issn.1000-758X.2011.04.005

• 第二届中国卫星导航学术年会论文 • 上一篇    下一篇

基于多相关器的GPS信号质量监测技术

甘兴利, 杨毅, 郭晓峰   

  1. (中国电子科技集团第五十四研究所,石家庄 050081)
  • 收稿日期:2011-03-18 修回日期:2011-04-13 出版日期:2011-08-25 发布日期:2011-08-25
  • 作者简介:甘兴利 1981年生,2008年获哈尔滨工程大学导航、制导与控制专业博士学位,工程师。研究方向为卫星导航系统高精度数据处理、伪卫星组网与时间同步、区域导航增强等技术。

Multi-correlators Techniques for GPS Signal Quality Monitoring

GAN  Xing-Li, YANG  Yi, GUO  Xiao-Feng   

  1. (The 54th Research Institute of CETC, Shijiazhuang 050081)
  • Received:2011-03-18 Revised:2011-04-13 Online:2011-08-25 Published:2011-08-25

摘要: 导航卫星的信号质量是影响系统定位性能的一个关键因素,当卫星自身硬件设备或空间传播信号受到干扰时,会导致卫星信号波形失真,用户接收机的伪码相关器产生的相关峰会产生偏差,造成定位精度下降;情况严重时,会使用户失去定位能力。因此,通过对空间信号的监测可以进一步保障系统的服务性能。文中借鉴现有的信号质量监测技术,对GPS信号失真的原因进行了总结,按照TMA、TMB和TMC完成失真信号的建模,并定性分析了对测距的影响。给出基于多相关器的导航信号质量监测方法,使用上述三种模型验证了该判定方法的有效性。

关键词: 信号质量监测, 多相关器, 信号失真, 全球定位系统, 导航卫星

Abstract: The signal quality of navigation satellites is the essential factor to the positioning performance. When the interferences occur  on the satellite′s hardware or on the space propagation signals, the corresponding waveforms will be  distorted, and the correlation peaks generated by the receivers become biased, hence degrade the positioning resolution, moreover, the positioning ability of users may also lost. Through  monitoring  the space signals, it may further assure the system′s service performance. The  causes of the distortion for GPS signals were concluded  based on current signal quality monitoring techniques.The modeling of distorted signals was completed based on digital fault model, analog fault model, digital/analog fault model.  The methods of multi-correlators GPS signal monitoring were presented and verified by applying the above three models.

Key words: Signal quality monitoring, Multi-correlators, Signal distortion, Global positioning system, Navigation satellite