现代防御技术 ›› 2022, Vol. 50 ›› Issue (3): 84-89.DOI: 10.3969/j.issn.1009-086x.2022.03.011

• 目标特性与探测跟踪技术 • 上一篇    下一篇

一种针对雷达回波分裂的相位补偿处理方法

代妍1, 刘丹1, 胡庆荣2, 陈成增1, 王悦循1   

  1. 1.北京无线电测量研究所,北京 100854
    2.中国航天系统工程有限公司,北京 100070
  • 收稿日期:2021-10-28 修回日期:2022-01-10 出版日期:2022-06-28 发布日期:2022-07-01
  • 作者简介:代妍(1994-),女,山东青岛人。博士生,主要研究方向为雷达信号处理、目标检测。

Phase Compensation Accumulation Method Based for Radar Echo Splitting

Yan DAI1, Dan LIU1, Qing-rong HU2, Cheng-zeng CHEN1, Yue-xun WANG1   

  1. 1.Beijing Institute of Radio Measurement, Beijing 100854, China
    2.China Aerospace Systems Engineering Corp. , Beijing 100070, China
  • Received:2021-10-28 Revised:2022-01-10 Online:2022-06-28 Published:2022-07-01

摘要:

随着雷达带宽的增大,单个脉冲的能量分散到不同的距离单元里,造成回波分裂,此时信噪比降低,不利于目标的检测。针对该问题,提出了一种回波相位补偿处理方法。该方法以2个散射点为例,对不同相对距离下的散射点回波进行分析,得到其相位关系,基于分析结果对线性调频信号回波进行相位补偿处理,将分散在不同距离单位的散射点回波信号有效积累,提高了信噪比,进而提高了检测概率。通过蒙特卡罗仿真验证了该方法的有效性。

关键词: 回波分裂, 信噪比, 目标检测, 相位补偿, 线性调频信号, 蒙特卡罗仿真

Abstract:

As the radar bandwidth increases, the energy of a single pulse is dispersed into different range units, resulting in echo splitting. At this time, the signal to noise ratio(SNR) decreases, which is not conducive to target detection. For this problem, an echo phase compensation method is proposed. Taking two scattering points as examples, the echo of scattering points at different relative distances is analyzed to obtain their phase relations. Based on the analysis results, the phase compensation process is carried out for the echo of linear frequency modulation(LFM) signal, and the echo signal scattered in different distance units is accumulated effectively, which improves the SNR and the detection probability. The effectiveness of the method is verified by Monte-Carlo simulations.

Key words: echo split, signal to noise ratio(SNR), target detection, phase compensation, linear frequency modulation(LFM) signal, Monte-Carlo simulation

中图分类号: