机载雷达同时SAR/GMTI模式全帧凝聚算法研究  

Research on full frame condensation algorithm of airborne radar in SAR/GMTI mode

作　　者：马军 MA Jun(No.38th Research Institute of China Electronics Technology Group Corporation,Hefei 230088,China;Key Laboratory Aperture Array and Space Application,Hefei 230088,China)

机构地区：[1]中国电子科技集团公司第三十八研究所,合肥230088 [2]孔径阵列与空间探测安徽省重点实验室,合肥230088

出　　处：《空天预警研究学报》2023年第6期406-411,共6页JOURNAL OF AIR & SPACE EARLY WARNING RESEARCH

摘　　要：机载雷达同时合成孔径/地面运动目标检测(SAR/GMTI)模式能够进行高分辨成像,采用传统点迹凝聚算法难以解决地面目标运动带来的散焦、多波束检测与目标尺寸形状带来的目标分裂以及虚假点迹问题,且点迹定位精度较差.为此对同时SAR/GMTI模式的回波脉冲进行分组划分,构建全帧凝聚的输入波束模型,并确定凝聚模型参数;通过对多波束的时空统一处理,得到波位时空统一公式,提出全帧凝聚算法.仿真结果验证了本文提出的全帧凝聚算法能够有效解决目标分裂和虚假点迹问题,点迹定位精度得到提升.通过量化分析验证了该算法是合理有效的.Airborne radar with simultaneous SAR/GMTI mode enables high-resolution imaging.The traditional plot condensation algorithm has difficulty in solving the problem of defocus caused by ground target motion,of target splitting caused by multi-beam detection and target size and shape,as well as the problem of false plot,and the plot positioning accuracy is also poor.To this end,the echo pulses in SAR/GMTI mode are divided into groups;the input beam model of full frame condensation is constructed,and the parameters of the condensation model are determined.Then,through the multi-beam space-time unified processing,the space-time unified formula of multi-beam is obtained,and finally the full frame condensation algorithm is proposed.The simulation results verify that the full-frame condensation algorithm proposed in the paper can effectively solve the problem of target splitting and false plot,with the accuracy of plot location improved.The quantitative analysis is also made to prove that the proposed algorithm is reasonable and effective.

关 键 词：机载雷达 同时合成孔径/地面运动目标检测 点迹凝聚 

分 类 号：TN958[电子电信—信号与信息处理]