射频前端滤波器对C/A码相关曲线的影响研究被引量：1

The study of the impact on the C/A code correlation curve from the RF filter

下载PDF

导出

摘要卫星信号中的C/A码序列经过导航接收机的前端带通滤波器后其波形会发生失真。失真的C/A码与本地正常的C/A码进行相关得到的相关曲线也会因此产生畸变,从而导致接收机鉴相发生偏差,影响定位精度。文中详细分析了射频前端滤波器对C/A码相关曲线的影响现象,并提出了利用本地滤波器补偿相关曲线失真的办法,实测结果表明该方法能有效抵消相关曲线的非对称失真,从而减少接收机鉴相误差。 The C/A code sequence in the satellite signal will cause its distortionwhen it Comes through the band--pass filter in the navigation receiver＇s RF.The correlation of the distortion C/A code and the local C/A code leads to the distortion of the correlation curve, resulting in the deviation of the phase discrimination and the lower positioning accuracy.In this paper,the impact on the C/A code correlation curve caused by the RF filter is analyzed in detail and put forward a method to solve this issue： using a local filter to compensate the distortion of the correlation curve. Measurement results show that this method can effectively reduce the distortion of the correlation curve,reducing the deviation of the code phase discrimination.

作者刘浩成陈樱婷

机构地区广东工业大学信息工程学院

出处《科技创新导报》 2014年第9期9-10,共2页 Science and Technology Innovation Herald

关键词导航接收机 C A码滤波器相关曲线补偿 navigation receiver,C/A code,filter,correlation curve,compensation

分类号 P228.4 [天文地球—大地测量学与测量工程]

引文网络
相关文献

参考文献6

1Kaplan E.Understanding GPS.. Principles And Applications[M],2 ed, Artech House,Inc.,2006.
2R.Zheng M Chen,X Ba and J Chen. A novel fine code phase determination approach for bandwidth limited snapshot GPS r eceiver [C]//P osition Location and Navigation Symposium,May 2010.
3J B-Y TSUI.Fundamentals of Global Positioning System ReceiversA Software Approach[M],2ed. John Wiley & Sons,Inc. ,2005.
4Betz J,Kolodziejski K. Extended Theory Of Early- Late Code Tracking For A Bandlimited GPS Receiver[J]. Journal of the Institute of Navigation, 2000,47(3): 211-226.
5M S Braasch,A J V Dierendonck and S Member. GPS Receiver Architecture And Measurements[J]. Proceedings of the IEEE,1999,87(1):48-64.
6VanDierendonck A J,Fenton P, Ford T.Theory and Performance of Narrow Correlator Spacing in a GPS Receiver[J].Journal of Navigation, 1992,39(3):265-284.