FDA-MIMO雷达非自适应波束形成抗主瓣欺骗式干扰研究  

Main-beam Deceptive Jamming Suppression with Non-adaptive Beam-forming in FDA-MIMO Radar

作　　者：兰岚 廖桂生[1] 许京伟[1] 黄岩 Lan Lan;Liao Guisheng;Xu Jingwei;Huang Yan(National Laboratory of Radar Signal Processing, Xidian University, Xi’an, Shaanxi 710071, China;State Key Laboratory of Millimeter Waves, Southeast University, Nanjing, Jiangsu 210096, China)

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071 [2]东南大学毫米波国家重点实验室,江苏南京210096

出　　处：《信号处理》2019年第6期944-950,共7页Journal of Signal Processing

基　　金：国家重点研发计划“战略性国际科技创新合作”重点专项(2016YFE0200400);陕西省国际科技合作重点研发计划(2017KW-ZD-12);国家自然科学基金(61621005)

摘　　要：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。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.

关 键 词：FDA-MIMO雷达 主瓣欺骗式干扰 非自适应波束形成 频率步进量 

分 类 号：TN958.5[电子电信—信号与信息处理]