电子学报 ›› 2012, Vol. 40 ›› Issue (10): 1938-1942.DOI: 10.3969/j.issn.0372-2112.2012.10.005

• 学术论文 • 上一篇    下一篇

双频GPS接收机的动态辅助L2P(Y)跟踪

王先毅1,2, 孙越强1, 杜起飞1, 白伟华1, 吴迪1, 王冬伟1,2   

  1. 1. 中国科学院空间科学与应用研究中心, 北京 100190;
    2. 中国科学院研究生院, 北京 100049
  • 收稿日期:2011-08-29 修回日期:2012-04-24 出版日期:2012-10-25 发布日期:2012-10-25
  • 作者简介:王先毅 男,1982年11月生于安徽芜湖.中国科学院空间科学与应用研究中心博士研究生,从事GNSS掩星大气探测及掩星接收机设计方面相关研究. E-mail:wxyeeis@ustc.edu 孙越强 女,1963年5月生,北京人.中国科学院空间科学与应用研究中心研究员、博士生导师.主要从事空间环境探测及GNSS在空间探测中的应用研究. E-mail:syq@nssc.ac.cn

Dynamic-Aided L2P(Y) Tracking in Dual-Frequency GPS Receiver

WANG Xian-yi1,2, SUN Yue-qiang1, DU Qi-fei1, BAI Wei-hua1, WU Di1, WANG Dong-wei1,2   

  1. 1. Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2011-08-29 Revised:2012-04-24 Online:2012-10-25 Published:2012-10-25

摘要: 双频接收机中对L2P(Y)信号的跟踪可以使用半无码方法.但由于半无码方法本身具有平方损耗,因此实际获得的L2P(Y)信号载噪比很低,对L2P(Y)信号跟踪环路的性能提出了更高的要求.文中提出了一种利用接收机动态辅助L2P(Y)码跟踪的方法,给出了环路的设计细节,并详细地讨论了影响环路性能的各个因素.通过计算机仿真,比较了动态辅助环路和未辅助环路的性能.仿真结果表明,使用动态辅助的L2P(Y)信号跟踪环路可以在更低的载噪比下进行有效跟踪.

关键词: GPS, 双频, 半无码, Z跟踪, 平方损耗, 动态辅助

Abstract: L2P(Y) signal tracking in dual-frequency receiver can be implemented by employing semi-codeless method.However,the actual L2P(Y) signal carrier to noise ratio is very low due to squaring-loss.As a result,higher performance requirements are needed for L2P(Y) signal tracking loop.This paper presents a way of using dynamic-aided L2P(Y) tracking.Loop design details are given,and the various factors affecting the performance of the loop are discussed in detail.The performances of the dynamic-aided loop and the none-aided loop are compared through computer simulation.Simulation results show that dynamic-aided method can track L2P(Y) signal in lower carrier to noise ratios effectively.

Key words: GPS, dual frequency, semi-codeless, Z-tracking, squaring loss, dynamic-aided

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