等扇区扩展杂波图的工程应用
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摘要
常规杂波图在城市、滨海复杂环境下杂波抑制效果不佳,过多的虚假点迹严重影响目标的正常录取。文中利用雷达回波数据,分析杂波图背景的建立过程,发现杂波图单元内的信号幅度起伏明显,使得杂波图背景无法收敛。文中在等扇区扩展杂波图的基础上进行工程改进,实录数据验证其对杂波的抑制率提高90%,目标损失小于1%。针对该方法的计算量与内存需求量较大的困难,给出优化后的工程实现过程,相比常规杂波图只需增加一个扇区的缓存空间。该方法有效提升雷达强杂波环境下的检测性能,具有较强的工程应用价值。
The normal clutter map gets less performance under complex environment at city and littoral. Too much false plots make serious infection of target normal tracking. Radar original echo was recorded, that the process of clutter map back was analysed and found that the signal in some clutter map cells aws fluctuant, causing clutter map backs convergence. Clutter Map of expanding is improved and validated the performance, clutter suppressing rate is more than 90% and target loss rate is less than 1%.The process of engineering application was provided solving the problem of large amount of calculation and more RAM requirement, it is only adding RAM of one shape more than the normal clutter map. This method can improve the detection capability of radar under strong clutter environment, it has a strong engineering application value.
The normal clutter map gets less performance under complex environment at city and littoral. Too much false plots make serious infection of target normal tracking. Radar original echo was recorded, that the process of clutter map back was analysed and found that the signal in some clutter map cells aws fluctuant, causing clutter map backs convergence. Clutter Map of expanding is improved and validated the performance, clutter suppressing rate is more than 90% and target loss rate is less than 1%.The process of engineering application was provided solving the problem of large amount of calculation and more RAM requirement, it is only adding RAM of one shape more than the normal clutter map. This method can improve the detection capability of radar under strong clutter environment, it has a strong engineering application value.
引文
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[2] 王雪,雷卓,欧阳耀果.基于雷达杂波图的CFAR算法[J].火控雷达技术,2010,39(4):52-55.WANG Xue,LEI Zhuo,OUYANG Yaoguo.CFAR algorithm based on clutter map of radar[J].Fire Control Radar Technology,2010,39(4):52-55.
[3] 林彦,彭应宁,王秀坛,等.一种双模式双参数杂波图恒虚警检测器的实现[J].系统工程与电子技术,2003,25(2):133-136.LIN Yan,PENG Yingning,WANG Xiutan,et al.Implementation of a dual-mode biparametric clutter-map CFAR detector[J].Journal of Systems Enginnering and Electronics,2003,25(2):133-136.
[4] 桂佑林,张冰瑞.防空雷达复杂强杂波抑制[J].现代雷达,2016,38(6):18-21.GUI Youlin,ZHANG Bingrui.Complex strong clutter suppression in surveillance radar[J].Modern Radar,2016,38(6):18-21.
[5] 马晓岩,向家彬,朱裕生,等.雷达信号处理[M].长沙:湖南科学技术出版社,1999.MA Xiaoyan,XIANG Jiabing,ZHU Yusheng,et al.Radar signal processing[M].Changsha:Hunan Science Technology Publishing Company,1999.
[6] 丁鹭飞,耿富录.雷达原理[M].3版.西安:西安电子科技大学出版社,2000.DING Lufei,GENG Fulu.Radar theory[M].3 rd ed.Xi′an:Xidian University Press,2000.
[7] 张飚,张仕元,窦泽华.警戒雷达仙波特性分析[J].现代雷达,2008,30(6):65-67.ZHANG Biao,ZHANG Shiyuan,DOU Zehua.Angels character analysis based on surveillance radar[J].Modern Radar,2008,30(6):65-67.
[8] 张飚,王茹琪.基于DSP的等面积杂波图设计与实现[J].现代雷达,2008,30(6):1-3.ZHANG Biao,WANG Ruqi.Design and realization of an equal-area-shaped clutter map based on DSP[J].Modern Radar,2008,30(6):1-3.
[9] 姜苏华,王茹琪.跟踪制导雷达中杂波图的设计与实现[J].电子工程师,2008,34(8):12-14.JIANG Suhua,WANG Ruqi.Design and realization of clutter map in tracking and guidance radar[J].Electronic Enginner,2008,34(8):12-14.
[10] 王辉辉,任彦.一种利用DDR3建立五维立体杂波图的实现方法[J].火控雷达技术,2017,46(4):37-42.WANG Huihui,REN Yan.An implementing method of establishing 5D volume clutter map with DDR3[J].Fire Control Radar Technology,2017(,464):37-42.