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一种低轨双星高脉冲重复频率雷达信号的定位模糊消除算法

姚山峰 贺青 欧阳鑫信 杨宇翔

姚山峰, 贺青, 欧阳鑫信, 杨宇翔. 一种低轨双星高脉冲重复频率雷达信号的定位模糊消除算法[J]. 电子与信息学报, 2021, 43(3): 598-605. doi: 10.11999/JEIT200210
引用本文: 姚山峰, 贺青, 欧阳鑫信, 杨宇翔. 一种低轨双星高脉冲重复频率雷达信号的定位模糊消除算法[J]. 电子与信息学报, 2021, 43(3): 598-605. doi: 10.11999/JEIT200210
Shanfeng YAO, Qing HE, Xinxin OUYANG, Yuxiang YANG. A Novel Method for Location Ambiguity Mitigation of High Pulse Repetition Frequency Radar Signal in Low Earth Orbit Dual-satellite Geolocation System[J]. Journal of Electronics and Information Technology, 2021, 43(3): 598-605. doi: 10.11999/JEIT200210
Citation: Shanfeng YAO, Qing HE, Xinxin OUYANG, Yuxiang YANG. A Novel Method for Location Ambiguity Mitigation of High Pulse Repetition Frequency Radar Signal in Low Earth Orbit Dual-satellite Geolocation System[J]. Journal of Electronics and Information Technology, 2021, 43(3): 598-605. doi: 10.11999/JEIT200210

一种低轨双星高脉冲重复频率雷达信号的定位模糊消除算法

doi: 10.11999/JEIT200210
基金项目: 国防科技重点实验室基金(9140C860104)
详细信息
    作者简介:

    姚山峰:男,1986年生,助理研究员,研究方向为无源定位与雷达信号处理

    贺青:男,1983年生,助理研究员,研究方向为无源定位与阵列信号处理

    欧阳鑫信:男,1987年生,助理研究员,研究方向为参数估计与统计信号处理

    杨宇翔:男,1983年生,副研究员,研究方向为参数估计与统计信号处理

    通讯作者:

    姚山峰 sephyao@163.com

  • 中图分类号: TN957.51

A Novel Method for Location Ambiguity Mitigation of High Pulse Repetition Frequency Radar Signal in Low Earth Orbit Dual-satellite Geolocation System

Funds: The National Defense Key Laboratory Foundation (9140C860104)
  • 摘要: 针对低轨(LEO)双星到达时间差(TDOA)定位系统中雷达信号的定位模糊问题,该文分析了高重频信号的模糊特性,演示了虚假定位点的产生过程,提出一种基于时差序列变化趋势匹配(VTMT)的定位模糊消除算法。在测量时差序列与定位结果对应的理论时差序列之间的残差近似服从正态分布的条件下,通过两个序列的欧式距离作为相似程度衡量依据,筛选出测量时差线与理论时差线最为接近的定位点作为目标辐射源真实位置。校验台测试信号验证了该算法的有效性。仿真结果表明,该算法能够显著提高无模糊定位概率,对长基线时差定位系统中雷达信号的定位具有较高的应用价值。
  • 图  1  时差周期模糊示意图

    图  2  分时时差定位模糊示意图

    图  3  时差/时差变化率定位模糊示意图(重频为20 kHz)

    图  4  定位模糊示意图(重复频率50 kHz)

    图  5  所有定位点均方根误差变化曲线

    图  6  所有定位结果分布图(重复频率50 kHz)

    图  7  理论时差变化曲线

    图  8  重复频率50 kHz校验台信号时差估计结果

    图  9  两种算法不同模糊数的RMSE比较

    图  10  不同时差测量精度下的定位模糊消除性能

    图  11  不同观测时长下的定位模糊消除性能

    图  12  不同位置的无模糊定位概率曲线

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出版历程
  • 收稿日期:  2020-03-25
  • 修回日期:  2020-09-09
  • 网络出版日期:  2020-09-16
  • 刊出日期:  2021-03-22

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