双/多基地雷达模糊函数建模与研究

Modeling and Study of Ambiguity Function for Bistatic and Multi-Static Radar

根据雷达模糊函数基本理论,结合双/多基地雷达几何结构,推导出了相干脉冲串信号和线性调频信号的双/多基地雷达模糊函数表达式。基于Matlab仿真,分析比较了双/多基地雷达模糊函数及随目标空域变化图,表明目标的分辨特性与目标的位置有关。当目标靠近基线的时候,双基地雷达模糊函数形状将展宽,目标分辨率显著降低。而对于多基地雷达,目标所在的空域位置变化时,模糊函数形状也会相应发生改变,但当目标靠近基线时,亦具有较好的距离模糊特性。数值计算与仿真结果有效地验证了模型建立的正确性。

The bistaic and multi-static radar ambiguity functions of coherent pulse cluster and linear FM signal were derived based on the principle of radar ambiguity function and the special geometrical configuration of them.By Matlab simulation,the plot of bistatic or multi-static radar ambiguity function and its changing with the airspace position of target were analyzed,which showed that the target resolution is related to the position of target.When the target is in the vicinity of the baseline,the shape of bistatic ambiguity function will be widened and target resolution is evidently degraded.The shape of multi-static ambiguity function is also influenced by the airspace position of target.However,when the target is in the vicinity of the baseline,the multi-static radar still has a good range resolution.Theoretical analysis and simulation results proved the correctness of the modeling.