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由于几何配置的多样性,双基雷达地杂波模拟比较复杂.虽然单基雷达杂波散射元划分的方法可用于双基地杂波仿真,但不利于特定距离门信号的分析.在比较了单双基地雷达地面散射元等距线的基础上,提出一种距离门信号级的机载双基雷达地杂波模拟方法,距离向以双程斜距分辨率划分椭圆环,推导出地面椭圆表达式和散射元坐标解析解,方位向引入椭圆中间参量,在保证多普勒分辨率基础上划分杂波元网格,给出杂波模拟中未知参量的计算.该方法不仅能进行所有观测区域杂波功率谱的仿真,且可完成某些或某个距离门杂波回波信号的计算分析,实现距离门信号级杂波的模拟.仿真结果验证了该方法的有效性.
Due to the diversity of geometrical configuration, the clutter simulation of bistatic radar is more complicated.Although the method of clutter scattering of single-base radar can be used for bistatic clutter simulation, it is not conducive to the analysis of a specific distance gate signal.When comparing the single Based on the equidistance line of the ground-based scattering element of bistatic radar, a clutter simulation method of airborne bistatic radar with distance gate signal is proposed. In this paper, we introduce the elliptic intermediate parameters in the azimuth direction and divide the clutter-element grids on the basis of the Doppler resolution to calculate the unknown parameters in the clutter simulation. This method not only can do all the observation areas Clutter power spectrum simulation, and can be completed some or a distance gate clutter echo signal calculation and realization of distance gate signal-level clutter simulation.The simulation results verify the effectiveness of the method.