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.
作者
兰岚
廖桂生
许京伟
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)
出处
《信号处理》
CSCD
北大核心
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)
