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基于局部搜索的机载外辐射源干扰抑制算法

邓亚琦 张赛文 李稳国 肖卫初

邓亚琦,张赛文,李稳国,等. 基于局部搜索的机载外辐射源干扰抑制算法[J]. 电波科学学报,xxxx,x(x): x-xx. DOI: 10.12265/j.cjors.2021308
引用本文: 邓亚琦,张赛文,李稳国,等. 基于局部搜索的机载外辐射源干扰抑制算法[J]. 电波科学学报,xxxx,x(x): x-xx. DOI: 10.12265/j.cjors.2021308
DENG Y Q, ZHANG S W, LI W G, et al. Interference suppression algorithm based on local search in airborne passive radar[J]. Chinese journal of radio science,xxxx,x(x): x-xx. (in Chinese). DOI: 10.12265/j.cjors.2021308
Citation: DENG Y Q, ZHANG S W, LI W G, et al. Interference suppression algorithm based on local search in airborne passive radar[J]. Chinese journal of radio science,xxxx,x(x): x-xx. (in Chinese). DOI: 10.12265/j.cjors.2021308

基于局部搜索的机载外辐射源干扰抑制算法

doi: 10.12265/j.cjors.2021308
基金项目: 湖南省自然科学基金青年基金(2021JJ40029);湖南省教育厅科学研究项目青年项目(21B0710)
详细信息
    作者简介:

    邓亚琦:(1991—),女,湖南人,博士,主要研究方向为机载外辐射源雷达信号处理、空时自适应处理

    张赛文:(1988—),男,湖南人,博士,主要研究方向为稀疏信号处理、超分辨显微成像

    李稳国:(1977—),男,湖南人,博士,主要研究方向为电网优化与控制

    通讯作者:

    邓亚琦 E-mail: dengyaqi@hncu.edu.cn

  • 中图分类号: TN958.97

Interference suppression algorithm based on local search in airborne passive radar

  • 摘要: 在机载外辐射源雷达不纯净参考信号条件下,参考通道中的多径与回波匹配得到的干扰将降低空时自适应处理的目标检测能力,而网格失配问题严重影响了干扰的估计性能. 本文针对网格失配下的机载外辐射源干扰抑制问题,提出一种基于局部搜索的干扰估计算法. 该算法在干扰稀疏观测模型的基础上构建全局距离-多普勒字典,从中选择与干扰相匹配的全局网格点;然后以该全局网格点为中心,对多普勒平面精细划分来构建局部多普勒字典,并选择与干扰更匹配的局部网格点;最后估计干扰的距离-多普勒像以实现干扰抑制,克服不纯净参考信号的影响. 仿真结果表明,所提算法可降低网格失配导致的抑制性能损失,有效提高不纯净参考信号下空时处理的目标检测能力.
  • 图  1  机载外辐射源雷达系统几何关系图

    Fig.  1  Bistatic geometry of airborne passive radar

    图  2  局部多普勒字典示意图

    Fig.  2  Illustration of local Doppler dictionary

    图  3  平均改善因子性能随迭代次数的变化

    Fig.  3  Average improved factor performance against the iteration number

    图  4  不同算法挑选出的原子位置分布

    Fig.  4  Location distribution of selected atoms for different algorithms

    图  5  不同算法的改善因子性能

    Fig.  5  Improved factor performance of different algorithms

    图  6  不同算法的目标检测结果

    Fig.  6  Target detection result of different algorithms

    图  7  不同算法的改善因子性能随多径个数的变化

    Fig.  7  Average improved factor performance of different algorithms against the number of multipath signals

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    LI Z H, ZHANG Y S, GAO Q, et al. Off-grid STAP algorithm based on local search orthogonal matching pursuit[J]. Systems engineering and electronics,2018,40(6):1221-1226. (in Chinese) DOI: 10.3969/j.issn.1001-506X.2018.06.05
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出版历程
  • 收稿日期:  2021-11-18
  • 录用日期:  2022-05-18
  • 网络出版日期:  2022-05-18

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