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导航卫星双频复用信号模拟失真的仿真

蔚小龙 寇艳红

蔚小龙, 寇艳红. 导航卫星双频复用信号模拟失真的仿真[J]. 北京航空航天大学学报, 2018, 44(5): 1048-1055. doi: 10.13700/j.bh.1001-5965.2017.0334
引用本文: 蔚小龙, 寇艳红. 导航卫星双频复用信号模拟失真的仿真[J]. 北京航空航天大学学报, 2018, 44(5): 1048-1055. doi: 10.13700/j.bh.1001-5965.2017.0334
YU Xiaolong, KOU Yanhong. Simulation of analog distortion of dual-frequency multiplexing signal generated by navigation satellite[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(5): 1048-1055. doi: 10.13700/j.bh.1001-5965.2017.0334(in Chinese)
Citation: YU Xiaolong, KOU Yanhong. Simulation of analog distortion of dual-frequency multiplexing signal generated by navigation satellite[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(5): 1048-1055. doi: 10.13700/j.bh.1001-5965.2017.0334(in Chinese)

导航卫星双频复用信号模拟失真的仿真

doi: 10.13700/j.bh.1001-5965.2017.0334
基金项目: 

国家自然科学基金 61271197

详细信息
    作者简介:

    蔚小龙  男, 硕士研究生。主要研究方向:卫星导航

    寇艳红  女, 博士, 副教授。主要研究方向:卫星导航、无线通信和数字信号处理技术

    通讯作者:

    寇艳红, E-mail: kouy@buaa.edu.cn

  • 中图分类号: TN967.1

Simulation of analog distortion of dual-frequency multiplexing signal generated by navigation satellite

Funds: 

National Natural Science Foundation of China 61271197

More Information
  • 摘要:

    导航卫星有效载荷信号生成链路组成部件的非理想特性不可避免会引起发射导航信号的失真,目前对于这种失真带来的信号测距性能损失并未有适用的解析模型。针对宽带双频复用信号的模拟失真,采用相关损耗、S曲线偏差和载波相位偏差作为评估指标,仿真评估了载荷模拟组件中高功率放大器(HPA)、HPA前置滤波器、多路复用器(OMUX)对AltBOC、TD-AltBOC、ACEBOC和AltLOC不同调制方式测距性能的影响。其中对于HPA使用了有记忆HPA行为模型,考虑了不同HPA前置滤波器带宽和HPA工作点的影响,并评估了失真信号相对于理想信号在宽带导频和单边带导频2种跟踪方式下的性能损失。仿真结果可以为信号调制方式比较评估、有效载荷信号生成链路的优化设计提供参考。

     

  • 图 1  载荷模拟失真评估的仿真模型

    Figure 1.  Simulation model for evaluation of payload analog distortion

    图 2  HPA工作点对各调制方式宽带导频跟踪性能的影响

    Figure 2.  Impact of HPA operating points on performance of wideband pilot tracking for different modulation schemes

    图 3  HPA工作点对各调制方式下边带导频跟踪性能的影响

    Figure 3.  Impact of HPA operating points on performance of lower sideband pilot tracking for different modulation schemes

    图 4  HPA前置滤波器带宽对各调制方式宽带导频跟踪性能的影响

    Figure 4.  Impact of pre-HPA filter bandwidth on performance of wideband pilot tracking for different modulation schemes

    图 5  HPA前置滤波器带宽对各调制方式下边带导频跟踪性能的影响

    Figure 5.  Impact of pre-HPA filter bandwidth on performance of lower sideband pilot tracking for different modulation schemes

    表  1  理想无失真信号的评估指标测量结果

    Table  1.   Evaluation index measurement results of ideal signal without distortion

    调制方式 宽带导频跟踪 下边带导频跟踪
    载波相位
    偏差/(°)
    S曲线
    偏差/m
    载波相位
    偏差/(°)
    S曲线
    偏差/m
    AltBOC 0.413 7 0.053 4 0.633 1 0.027 6
    TD-AltBOC 0.002 8 0.008 1 0.151 9 0.020 5
    ACEBOC 0.436 0 0.014 8 0.141 1 0.013 7
    AltLOC 0.487 6 0.004 7
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-05-19
  • 录用日期:  2017-06-09
  • 刊出日期:  2018-05-20

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