摘要
机载SAR要获得高分辨率的图像,必须保证天线波束的指向恒定。提出了一种基于FPGA与二维电扫相控阵天线实现SAR实时运动补偿的方案,并结合FPGA的特点采用了CORDIC算法做为超越函数处理模块。通过实时控制相控阵天线,实现了载机在姿态发生变化时依然保证波束稳定地指向测绘带中心,从而得到高分辨率的图像。
In order to obtain high resolution images,the antenna direction of airborne SAR must be steady and precision.Design of real time motion compensation system for SAR based on FPGA and 2-D electronically scanning phased array antennas is presented,and CORDIC algorithm is implemented to calculate transcendental functions.By control phased array antennas in real time,the motion compensation system will guarantee the invariableness of the antenna direction and gain high resolution radar images.
出处
《电子器件》
CAS
2010年第3期332-335,共4页
Chinese Journal of Electron Devices
