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Achieving Centimeter Ranging Accuracy with Triple-frequency Signals in C-band Satellite Navigation Systems

机译：在C波段卫星导航系统中使用三频信号实现厘米的测距精度

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摘要

The Chinese Area Positioning System (CAPS) uses communication carriers at C-band for navigation services and all the navigation and ranging signals are generated at ground stations instead of onboard satellites. The C-band communication downlink frequency ranges from 3.4 GHz to 4.2 GHz, allowing CAPS to choose three frequencies for precision navigation. The paper identifies optimal code and phase combinations from three frequencies so that the ionospheric delays can be removed or mostly reduced in their differences and ambiguities of selected combined phase signals can be determined over a few epochs at a high success probability. Any two of these ambiguity-fixed phase combinations can be used to estimate the ionospheric corrections and form an ionosphere-free phase measurement for position estimation. Analysis shows that the third frequency in principle is chosen close to the middle of the two outer frequencies to minimize the time required for smoothing of the ionospheric corrections.
机译：中国区域定位系统（CAPS）使用C波段的通信运营商提供导航服务，并且所有导航和测距信号都是在地面站而不是机载卫星上生成的。 C波段通信下行链路频率范围为3.4 GHz至4.2 GHz，从而使CAPS可以选择三个频率进行精确导航。本文从三个频率中确定了最佳代码和相位组合，从而可以消除电离层延迟或最大程度地减少电离层延迟的差异，并且可以在几个时期内以很高的成功概率确定所选组合相位信号的模糊性。这些不确定度固定的相位组合中的任何两个都可用于估计电离层校正，并形成无电离层相位测量值以进行位置估计。分析表明，原则上选择第三个频率，使其接近两个外部频率的中间值，以最小化平滑电离层校正所需的时间。

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  • 来源
    《Navigation》 |2011年第1期|p.59-68|共10页
  • 作者

    GUOXIANG Al; LIHUA MA; HULI SHI; GUANYI MA; Ji GUO; ZHIGANG LI; XIAOHUI LI; HAITAO WU; YUJING BIAN;

  • 作者单位

    National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;

    National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;

    National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;

    National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;

    National Time Service Center, Chinese Academy of Sciences, Lintong 710600, China;

    National Time Service Center, Chinese Academy of Sciences, Lintong 710600, China;

    National Time Service Center, Chinese Academy of Sciences, Lintong 710600, China;

    National Time Service Center, Chinese Academy of Sciences, Lintong 710600, China;

    National Time Service Center, Chinese Academy of Sciences, Lintong 710600, China;

  • 收录信息 美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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