北京航空航天大学学报 ›› 2015, Vol. 41 ›› Issue (2): 331-336.doi: 10.13700/j.bh.1001-5965.2014.0095

• 论文 • 上一篇    下一篇

基于运动约束的脉冲雷达游标测距方法

陈浩, 郭军海, 齐巍   

  1. 北京跟踪与通信技术研究所, 北京 100094
  • 收稿日期:2014-03-05 出版日期:2015-02-20 发布日期:2015-03-12
  • 通讯作者: 郭军海(1968—),男, 湖北宜昌人, 研究员,gjchy@aliyun.com, 主要研究方向为外弹道测量数据处理方法研究, 雷达信号处理. E-mail:gjchy@aliyun.com
  • 作者简介:陈浩(1989—), 男, 湖北武穴人, 硕士生, chinnyhaochen@126.com
  • 基金资助:

    国家自然科学基金资助项目(61101070); 总装备部预先研究资助项目

Vernier ranging method for pulse radar based on motion constraints

CHEN Hao, GUO Junhai, QI Wei   

  1. Beijing Institute of Tracking and Telecommunication Technology, Beijing 100094, China
  • Received:2014-03-05 Online:2015-02-20 Published:2015-03-12

摘要:

为解决传统脉冲雷达游标测距中解相位模糊和解速度模糊相互耦合的问题,将目标的运动约束与传统游标测距结合在一起,提出了一种新的基于运动约束的游标测距方法.利用运动约束积累一段时间的观测数据进行UKF滤波,得到精度较高的径向速度来解速度模糊,得到的无模糊速度可用于距离游标.利用得到的游标距离取代脉冲测距数据进行UKF预测,可准确估计下一时刻的速度并解速度模糊,这样建立了可同时解相位模糊和解速度模糊的耦合滤波器,成功实现脉冲雷达游标测距,并大大减小脉冲雷达测距随机误差.高速飞行器主动段仿真和脉冲雷达实测数据验证表明,该算法能大大减小径向距离随机误差,将距离随机误差减少一个数量级至分米级.

关键词: 距离游标, 运动约束, 解相位模糊, 解速度模糊, UKF滤波

Abstract:

Traditional pulse radar Vernier ranging method has the problem of coupled ambiguity in resolving the ambiguity of Doppler phase and velocity. To solve this problem, the motion constraint of target was applied into Vernier ranging and a new motion constraint Vernier ranging method was proposed. Accumulating a period of measurement data, an unscented Kalman filter was used to estimate radial velocities with higher accuracy. The high accuracy velocities were used to resolve the velocity ambiguity to startup the Vernier ranging. The radial velocity of next time period was accurately estimated through UKF forecast on the Vernier range, and the velocity ambiguity of next period was resolved. The coupling filter that could resolve phase ambiguity and velocity ambiguity was built, and the random errors of pulse radar radial range data were greatly eliminated using this new Vernier ranging method. Simulations of high-speed aircraft in boost phase and measured data of pulse radar prove that, this motion constraint Vernier ranging method greatly reduces the random error of radial range from meters to decimeters.

Key words: Vernier ranging, motion constraint, phase ambiguity resolution, velocity ambiguity resolution, unscented Kalman filter

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