一种机载雷达地杂波仿真的快速算法

A Fast Algorithm for Ground Clutter Simulation of Airborne Radar

机载下视雷达的地杂波具有功率大、频域宽、范围广等特点,其在计算机仿真中占用大量资源,耗时较长。为解决这一问题,文中采用基于网格映像的距离-多普勒单元划分的积分方法求杂波功率,并在此基础上引入了一种快速实时的仿真算法。该算法对天线增益、后向散射系数、网格单元面积等数据预先进行量化存储,在计算时用查表法精确快速地读取数据,节省了大量运算单元,提高了仿真速度,满足了快速实时仿真的要求。

The ground clutter in down scan airborne radar, which has high power, wide spectrum and wide range, consumes large amount of resources and time in computer simulation. To address this problem, we adopt the integral methods of distance-doppler unit division based on grid mapping to obtain the clutter power, and introduce a real-time fast algorithm, which quantitatively stores these data as antenna gain, backscattering coefficient and clutter area in advance, and reads these data accurately and rapidly using the method of look-up table. Therefore, a large number of computing units are saved, and the simulation speed is also improved to a great extent. The proposed algorithm meets the requirements of real-time fast simulation.