低空多径环境下雷达目标检测性能研究

针对低空多径环境下不同体制雷达目标检测性能展开研究,通过优化配置雷达阵元达到多径环境下的最优检测性能。建立低空多径环境下雷达接收信号模型,引入多径功率传播因子,将经典的Swerling目标起伏模型推广应用于低空多径环境,采用特征函数法推导低空多径环境下不同体制雷达的检测概率。仿真研究了多径功率传播因子对检测性能的影响,比较不同体制雷达的检测性能,结果表明多输入单输出雷达兼具相控阵雷达和多输入多输出雷达的优点,在多径环境下具有稳定的检测性能。

A Study on the Target Detection Performance of Radar in Low-altitude Multipath Environment

The research is carried out aiming at the target detection performance of different radar systems in low-altitude multipath environment. The best detection performance is reached by optimizing the configuration of radar array elements in multipath environment. The receiving signal models of radars in low-altitude multipath environment are set up, and the multipath power propagation factor is introduced to apply the classical Swerling models of target fluctuation to the low-altitude multipath environment. The eigenfunction method is used to obtain the detection probabilities of different radar systems. The affection of multipath power propagation factor on detection performance is analyzed and the detection performances of different radar systems are compared by simulation. It is suggested by the simulation results that the multiple input single output radar combines the strengths of phased array radar and multiple input multiple output radar, and has stable detection performance in multipath environment.