天线斜置情况下三通道SAR-GMTI技术研究  

Study on the Three Channels SAR-GMTI System with the Slant-Placed Antennae

作　　者：李亚超[1] 李晓明[1] 邢孟道[1] 保铮[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,西安710071

出　　处：《电子与信息学报》2009年第3期578-582,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学青年基金(60502044);新世纪优秀人才支持计划项目(66ZY0706)资助课题

摘　　要：该文提出了一种新的基于DPCA(相位中心偏置天线)技术的动目标检测体制,即天线沿载机飞行方向按一定倾斜角度放置。利用等效相位中心原理建立了天线斜置情况下三通道运动目标回波信号模型,给出了天线倾斜角对动目标检测、最小可检测速度和盲速的影响。通过改进的DPCA技术实现运动目标的检测、测速和定位。最后,仿真数据验证了该新体制和改进DPCA技术对运动目标检测的可行性。This paper proposes a new system based on DPCA technology for the detection and position of moving target, namely three antennae are placed at a slant angle along airplane flying detection. The echo model of moving target is established based on three channels with the slant-placed antennae in terms of the equivalent phase center principle. The analysis of the detection of moving target, MVD and blind velocity relative to the slant-placed antenna is given and the improved DPCA technology is presented for the detection, velocity meansure and position. Finally, the simulated data confirm this new system and the improved DPCA technology.

关 键 词：SAR 运动目标检测 相位中心偏置天线 最小可检测速度 

分 类 号：TN95[电子电信—信号与信息处理]