双基地多输入多输出(MIMO)雷达发射正交波形,不同地面杂波单元的回波信号形式存在明显差异,传统的杂波建 模方法已不再适用。文中提出一种双基地MIMO雷达杂波建模方法,将地面划分为满足发射角度分辨率、接收角度分辨 率、距离分辨率三重约束的杂波散射单元,并计算各单元的杂波回波信号,然后将各单元回波信号采用矢量相加求得总的 杂波视频信号。最后通过对传统雷达杂波建模与本文建模方法的仿真与分析,增强了对双基地MIMO雷达杂波谱结构的 认识,有助于开展对双基地MIMO雷达杂波抑制的研究。

By transmitting orthogonal waveforms, the echoes of different ground clutter patches vary significantly which results that the traditional clutter models are no longer valid. In this paper, a novel clutter modeling method of bistatic MIMO radar is presented which divides the ground into numbers of clutter scatting patches that satisfies the resolution constraints of transmitting angle, receiving angle and range. By calculating the echo of each clutter patch, the summation of all the echoes is obtained as the total clutter signal. Simulation and analysis of the clutter spectrums for three operating modes are shown finally, which strengthens the cognition of the clutter spectrum structure and redound to the study of clutter mitigation of bistatic MIMO radar.

国家自然科学基金资助