一种改进的球载雷达气象杂波建模方法
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摘要
球载雷达由于雷达平台的升高并采用下视工作,面临着强的地海杂波和气象杂波。针对径向速度较小的目标落在气象杂波区会降低雷达检测性能这个问题,为了更好地抑制气象杂波,本文提出了一种球载雷达气象杂波建模方法。首先建立了气象杂波的空间模型和数学模型,然后分析了气象杂波的分辨特性和幅度频率特性,基本完成了球载雷达杂波建模。最后通过对杂波建模仿真及其MTD结果的分析,进一步揭示了气象杂波的特性,为下一步探讨球载雷达杂波抑制方法提供了支撑。
Aerostat radar is faced with strong ground clutter,sea clutter and meteorology clutter due to the rise of radar platforms.Aiming at the fact that the targets with small radial velocity fall into the meteorology clutter,which will reduce the detection performance of radar,a method of modeling the meteorology clutter is proposed in this paper to better suppress the meteorology clutter.First,the space model and mathematical model of meteorology clutter is set up.Then the resolution characteristics and amplitude-frequency characteristics of meteorology clutter are analyzed.The meteorology clutter modeling of aerostat radar is completed basically.Through analyzing the modeling and simulation of meteorology clutter and the MTD simulation results,the characteristics of meteorology clutter is further revealed.Our efforts could provide a support for the next step to discuss clutter suppression methods for aerostat radar.
Aerostat radar is faced with strong ground clutter,sea clutter and meteorology clutter due to the rise of radar platforms.Aiming at the fact that the targets with small radial velocity fall into the meteorology clutter,which will reduce the detection performance of radar,a method of modeling the meteorology clutter is proposed in this paper to better suppress the meteorology clutter.First,the space model and mathematical model of meteorology clutter is set up.Then the resolution characteristics and amplitude-frequency characteristics of meteorology clutter are analyzed.The meteorology clutter modeling of aerostat radar is completed basically.Through analyzing the modeling and simulation of meteorology clutter and the MTD simulation results,the characteristics of meteorology clutter is further revealed.Our efforts could provide a support for the next step to discuss clutter suppression methods for aerostat radar.
引文
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[2]杨大伟.球载雷达探测低空小目标的性能分析[J].舰船电子对抗,2012,35(2):38-43.
[3]战立晓,汤子跃,朱振波,等.气球载雷达云雨杂波建模与仿真[J].雷达科学与技术,2010,8(1):15-19.ZHAN Lixiao,TANG Ziyue,ZHU Zhenbo,et al.Modeling and Simulation of Rain Clutter for Tethered Aerostat Borne Radar[J].Radar Science and Technology,2010,8(1):15-19.(in Chinese)
[4]邓赛强,金林,梁浩.海杂波背景下的雷达性能评估研究[J].雷达科学与技术,2017,15(5):525-530.DENG Saiqiang,JIN Lin,LIANG Hao.Study on Radar Performance Evaluation in Sea Clutter[J].Radar Science and Technology,2017,15(5):525-530.(in Chinese)
[5]于莹洁,李勇.机载气象雷达的三维湍流模型和探测仿真方法[J].系统工程与电子技术,2016,38(2):293-297.
[6]王磊,于超鹏,刘平.机载相控阵天气雷达回波仿真与分析[J].系统仿真学报,2016,28(8):1869-1877.
[7]王旭,蔡兴雨,朱思桥,等.基于点迹特征的气象杂波抑制技术[J].火控雷达技术,2017,46(2):6-14.
[8]THOMSON A D,RISEBOROUGH E S.Evaluation of a Weather Clutter Simulation[J].IEE Proceedings:Radar,Sonar and Navigation,2001,148(3):119-129.
[9]黄向清,林新党.雷达海杂波与气象杂波模拟方法研究[J].雷达与对抗,2017,37(3):5-9.
[10]SKOLNIK M I.雷达手册[M].2版.北京:电子工业出版社,1999:940-941.
[11]杨尚军.雷达模拟器气象杂波的建模与仿真[D].长沙:国防科学技术大学,2006.
[12]刘霞飞.雷达杂波分类与抑制技术研究[D].西安:西安电子科技大学,2015.