FDA-MIMO雷达非自适应波束形成抗主瓣欺骗式干扰研究

频率分集阵（frequency diverse array, FDA）雷达通过在发射阵元间引入微小的频率步进量，具有额外的距离维可控自由度。通过结合多输入多输出(multiple-input and multiple-output，MIMO)技术，可在接收端分离发射波形，并获得距离角度耦合的发射导向矢量，增加了信号处理的灵活性。本文针对主瓣欺骗式干扰抑制问题，在FDA-MIMO 雷达体制中提出了一种基于非自适应波束形成的抗干扰方法，通过选择合适的频率步进量，使欺骗式假目标位于波束形成方向图的零点，从而实现对其的抑制。仿真实验验证了所提方法的有效性。 

Main-beam deceptive jamming suppression with non-adaptive beam-forming in FDA-MIMO radar

A small frequency increment is introduced across the elements of the frequency diverse array (FDA) radar, which results in an extra controllable range-dependent degrees-of-freedom (DOFs). By combining with the multiple-input and multiple-output (MIMO) technique, the transmit waveforms are separated in the receiver and the range-angle-dependent transmit steering vector can be obtained, which increases the flexibility of signal processing. In this paper, in order to solve the problem of main-beam deceptive jamming, a jamming suppression approach is proposed with the non-adaptive beam-forming in the FDA-MIMO radar. By selecting a proper frequency increment, the deceptive false targets which dwell at the null points of the beam-pattern can be effectively suppressed. Simulation examples are provided to demonstrate the effectiveness of the proposed approach.