基于通道对消处理的SAR快速运动目标检测技术研究

SAR Fast Moving Target Detection Technology Based on the Removing Processing of the Channel

论文深入研究了基于通道对消处理的SAR快速运动目标检测、定位和速度估计技术。基于双通道杂波对消对快速运动目标信号的的影响,提出将通道对消后的残差SAR图像反变换回距离压缩方位时域,通过Radon变换计算距离走动的斜率,得到径向速度估计,再利用keystone变换完成运动目标的距离走动校正。基于图像熵最小化准则,采用参数搜索法实现方位向聚焦,同时获得切向速度估计值,在实现二维聚焦的基础上完成快速运动目标检测,最后对所提出的快速运动目标检测方法进行了仿真验证。

SAR fast moving target detection ,location and speed estimation technology based on channel cancellation processing is studied in detail .Based on the effects of dual channel clutter cancellation on the fast moving target signal ,the channel after the cancellation of residual SAR image compression bearing time domain inverse transform back into the dis -tance is put forward .Randon transform is used to calculate walking distance of the slope ,to get radial velocity estimation . The keystone transformation is used to finish correcting of moving targets distance .Based on image entropy minimization rule ,direction to focus is achieved by parameter research method ,at the same time ,the tangential velocity estimation is ob-tained .Fast moving target detection is achieved based on two-dimensional focusing .At last ,the simulation of the proposed method is conducted .