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Implementation and Performance of Clock Steering in a Software GPS L1 Single Frequency Receiver

机译：GPS L1单频软件接收器中时钟控制的实现和性能

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摘要

This paper implements clock steering in a software GPS receiver that maintains the receiver time with a certain range from the GPS time (GPST) and reports the position / measurements on integer seconds. Recognizing that the essence of clock steering is to estimate the true sampling frequency of the receiver, this estimation could be done by using either the code or carrier phase measurements. Therefore, the quality of the code and carrier phase measurements becomes significant. The detailed algorithms for generating those two measurements in a software GPS receiver are presented. The quality of the algorithms is evaluated through the validation of the single point and carrier phase differential position solutions. The clock steering algorithms based on both the code and carrier phase are then presented and evaluated. Test results show that when the steering option is turned on, the remaining clock errors in the receiver measurements are less than 50 ns.
机译：本文在软件GPS接收器中实现时钟控制，该软件将接收器时间维持在距GPS时间（GPST）一定范围内，并以整数秒报告位置/测量值。认识到时钟控制的本质是估计接收机的真实采样频率，可以通过使用代码或载波相位测量来完成此估计。因此，代码和载波相位测量的质量变得很重要。给出了用于在软件GPS接收器中生成这两个测量值的详细算法。通过对单点和载波相位差分位置解的验证来评估算法的质量。然后提出并评估了基于代码相位和载波相位的时钟控制算法。测试结果表明，打开转向选项后，接收机测量中的剩余时钟误差小于50 ns。

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  • 来源
    《Navigation》 |2010年第1期|69-85|共17页
  • 作者

    XIAOFAN LI; DENNIS AKOS;

  • 作者单位

    University of Colorado, Boulder, Colorado 80309;

    University of Colorado, Boulder, Colorado 80309;

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