为提高频控阵雷达的抗干扰能力,针对基于最小方差无失真响应(MVDR)波束形成算法的频控阵雷达干扰抑制方法进行了研究。 首先,构建了频控阵阵列系统的信号模型,基于信号模型推导了基于频控阵的 MVDR 波束形成算法;然后,将传统相控阵中的 MVDR 波束形成算法应用到频控阵当中;最后,通过仿真分析了 MVDR 波束形成算法的抗干扰能力。 仿真结果表明:采用 MVDR 波束形成算法能够实现目标位置增益最大;此外,信号输出信噪比随输入信噪比的增大而逐渐增大。文中研究能有效提高频控阵雷达在距离与角度维度的抗干扰能力,对于提升雷达检测系统的性能具有重要意义。

In order to improve the anti-jamming ability of frequency diverse array radar, the jamming suppression method of frequency diverse array radar based on minimum variance distortionless response (MVDR) beamforming algorithm is studied. Firstly, the signal model of frequency diverse array system is constructed, with the basis of which the MVDR beamforming algorithm based on frequency diverse array is deduced. Then, the MVDR algorithm in traditional phased array is applied to frequency diverse array. Finally, the anti-jamming ability of MVDR algorithm is analyzed by simulation. Simulation results show that with MVDR algorithm, the maximum target position gain can be achieved. Besides that, the output signal-to-noise ratio of the signal increases gradually with the increase of the input signal-to-noise ratio. With this study, the anti-jamming ability of frequency diverse array radar in range dimension and angle dimension can be effectively improved, which is of great significance to improve the performance of radar detection system.

TN973

浙江省舟山市科技局资助项目(2016C31050)