高精度干涉测高雷达回波快速实现方法  

Fast implementation method of high-precision interferometric radar echo simulation

作　　者：宋兵兵[1] 潘明海[1] 梁志恒[2] 朱学玲[2] 

机构地区：[1]南京航空航天大学雷达成像与微波光子技术教育部重点实验室,江苏南京210016 [2]清华大学精密仪器系,北京100084

出　　处：《哈尔滨工程大学学报》2015年第11期1494-1498,共5页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(61071164;61271327);江苏省高校优势学科建设工程资助项目(PAPD)

摘　　要：雷达回波半实物仿真是研究雷达系统参数及其处理算法的有效手段。回波模拟的精度对判定雷达系统处理结果的有效性和准确性有直接影响。基于此提出了一种提高干涉测高雷达回波仿真精度的方法,利用升采样技术,尽可能减小因距离取整带来的相位误差,处理完成后再利用降采样恢复到原始采样率,以便于在工程上实现。采用图形处理器(GPU)完成回波数据的快速产生,极大地提高了运算效率,大大缩短了回波数据产生所需的时间。半实物仿真试验表明:该方法不仅能将回波仿真精度提高上百倍,还能将试验时间缩短为原来的百分之一,极大地提高了试验效率。Hardware-in-the-loop simulation is an effective means to research radar system parameters and processing algorithms. Echo simulation precision directly influences the effectiveness and accuracy of processing results in a ra- dar system. This article proposes an algorithm to raise the precision of interferometric radar echo simulation. It uses up-sampling technology to reduce the phase error caused by rounding off the distance as much as possible. For engi- neering implementation, the signal after processing would recover to the original sample rate by down-sampling. U- sing a graphic processing unit （GPU） , the echo data generated rapidly, which greatly raised efficiency, and great- ly reduced the time for generating echo data. hardware-in-the-loop simulation shows that this method can not only greatly improve the echo simulation precision by hundreds of times, and also reduce time by 99%. Thus this method greatly improves test efficiency.

关 键 词：半实物仿真 干涉测高雷达 回波模拟 图形处理器 升采样 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]