非高斯杂波谱模型下的MTI性能分析

MTI PERFORMANCE ANALYSIS IN NON-GAUSSIAN CLUTTER ENVIRONMENTS

该文主要讨论了在非高斯型的立方及平方型杂波功率谱环境下雷达系统的MTI性能,给出了MTI滤波器平均改善因子的上限。表明在谱宽相同时,立方及平方型杂波谱下的MTI性能远劣于高斯型。对各种杂波谱下的谱宽等效性引入了L^2(R)上杂波谱均方根带宽的度量,它较客观地反映了分布型杂波谱的总体平均宽度。最后,给出了MTI滤波器对杂波谱宽失配情况下改善因子的损失曲线,显示在立方和平方杂波谱下,性能损失对失配极不敏感。

The MTI performance in non-Gaussian type clutter such as cubic and square clutter PSD (Power Spectrum Density) environments is analyzed. The up limit curves of the average improvement factor are given. Results show that the MTI performance in cubic or square PSD condition is much poor than in Gaussian. A measure for the clutter bandwidth is proposed in L2(R) space, which is more objective for evaluating the equivalence among the bandwidth of these three clutter PSDs. Finally, the curves of MTI performance degradation versus the MTI filter mismatch are presented, which shows that the performance degradation is insensitive to the mismatch only in cubic and square clutter PSD conditions.