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首页> 外文期刊>Journal of Aeronautics Astronautics and Aviation >PERFORMANCE ANALYSIS OF GNSS VECTOR TRACKING LOOP BASED GNSS/CSAC INTEGRATED NAVIGATION SYSTEM
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PERFORMANCE ANALYSIS OF GNSS VECTOR TRACKING LOOP BASED GNSS/CSAC INTEGRATED NAVIGATION SYSTEM

机译：基于GNSS向量跟踪环的GNSS / CSAC组合导航系统性能分析。

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摘要

In the GNSS receiver, the position and velocity values are determined by the pseudo-range and pseudo-range rates respectively. For the vector tracking loop, the navigation filter estimates the navigation solutions using the measurements from the frequency discriminators and the code phase discriminators. The estimation of clock bias and clock drift are the key elements which make great impact on the performance of the vector tracking loops including the tracking and the navigation solutions. With the development of the micro-electromechanical system (MEMS) technology, the chip scale atomic clock (CSAC) is gradually cheap, small and its performance constantly improved. It becomes possible for the employment of CSAC in the receiver. In this paper, the performance of the CSAC based vector tracking is analyzed and evaluated. In the semi-physical simulation system, the CSAC is employed as the time reference as the immediate frequency data collecting equipment. An experiment was conducted and the results were presented by the comparison of the values of the dilution of position (DOP) and the accuracy of the navigation solutions. The results show the mean value of the PDOPs decease by 24.6%, 27.8%, 12.1% and 21.4% respectively (PDOP, HDOP, VDOP and TDOP) compared with the cheap oscillator based vector tracking loop.
机译：在GNSS接收机中，位置和速度值分别由伪距和伪距速率确定。对于矢量跟踪环路，导航滤波器使用来自鉴频器和码相位鉴频器的测量值来估计导航解。时钟偏差和时钟漂移的估计是对矢量跟踪回路（包括跟踪和导航解决方案）的性能产生重大影响的关键元素。随着微机电系统（MEMS）技术的发展，芯片级原子钟（CSAC）逐渐便宜，体积小且性能不断提高。在接收器中使用CSAC成为可能。在本文中，分析和评估了基于CSAC的矢量跟踪的性能。在半物理模拟系统中，CSAC被用作时间基准，作为立即频率数据收集设备。进行了实验，并通过比较位置稀释度（DOP）的值和导航解决方案的准确性来呈现结果。结果表明，与便宜的基于振荡器的矢量跟踪环路相比，PDOPs的平均值分别下降了24.6％，27.8％，12.1％和21.4％（PDOP，HDOP，VDOP和TDOP）。

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    Changhui Jiang; Shuai Chen; Yuwei Chen; Yuming Bo; Chaochen Wang; Wei Tao;

  • 作者单位

    School of Automation, Nanjing University of Science and Technology, China,Department of Remote Sensing and Photogrammetry, Finnish Geospatial Research Institute, Finland;

    School of Automation, Nanjing University of Science and Technology, China;

    Department of Remote Sensing and Photogrammetry, Finnish Geospatial Research Institute, Finland;

    School of Automation, Nanjing University of Science and Technology, China;

    School of Automation, Nanjing University of Science and Technology, China;

    Shanghai Railway Bureau Xuzhou paragraph, China;

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  • 正文语种 eng
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  • 关键词

    GNSS; vector tracking loop; clock bias; clock drift; MEMS, DOP;

    机译：GNSS;矢量跟踪循环;时钟偏差;时钟漂移;MEMS;DOP;

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