基于近程杂波协方差矩阵构造的俯仰滤波方法  

Elevation Filtering Method Based on The Construction of Near-range Clutter Covariance Array

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作  者:林丽娜 郑文文 陆小凯[2] 完诚[2] 钱乔龙 LIN Li-na;ZHENG Wen-wen;LU Xiao-kai;WAN Cheng;QIAN Qiao-long(Naval Equippment Project Maragement Center,Beijing 100071,China;The 723 Institute of CSIC,Yangzhou 225101,China)

机构地区:[1]海装装备项目管理中心,北京100071 [2]中国船舶重工集团公司第七二三研究所,江苏扬州225101

出  处:《舰船电子对抗》2020年第5期8-12,共5页Shipboard Electronic Countermeasure

摘  要:针对机载雷达由于非正侧阵放置导致的杂波非平稳性问题,提出了一种新的俯仰滤波方法。首先分析了近程杂波特性,得出近程杂波是引起杂波非平稳性的关键因素;然后给出了一种利用先验知识构造近程杂波的协方差矩阵,利用该协方差进行空域俯仰滤波,从而提高杂波平稳性;最后通过仿真试验验证了该方法能够有效抑制近程杂波,提高杂波的平稳性,有利于后续的处理,比如空时自适应信号处理(STAP)。In this paper,a new elevation filtering method is proposed to solve the clutter non-stationarity problem of airborne radar caused by the placement of non-side looking array.Firstly,the near-range clutter characteristics is analyzed,and it is concluded that the near-range clutter is the key factor causing the non-stationary clutter.Secondly,a method is proposed,which uses prior knowledge to structure the covariance array of near-range clutter and uses the array to perform elevation filtering in space field,thus the clutter stationarity is improved.Finally,through simulation experiment,it is verified that the method can effectively suppress the near-range clutter,improve the smoothness of clutter,and facilitate the subsequent processing,such as space-time adaptive processing(STAP).

关 键 词:近程杂波 俯仰滤波 协方差 

分 类 号:TN957.51[电子电信—信号与信息处理]

 

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