摘要
针对复杂电磁干扰环境中的数字射频存储器(DRFM)转发式主瓣干扰,以每个天线阵元独立可控的数字阵列为平台,提出一种基于频率分集(FDA)数字阵的抗DRFM转发式主瓣距离欺骗干扰方法。在发射端,每个发射阵元间载频存在微小的频率偏移量,接收时,阵列接收信号经匹配滤波器组分离出发射波形后,可获得距离角度二维耦合的等效发射方向图,利用此特性,可在距离维区分真、假目标,再采用Capon波束形成,在距离维形成干扰零陷,从而实现对干扰的抑制。该方法有效地解决了DRFM转发式主瓣距离欺骗干扰抑制的问题,提升了数字阵在复杂电磁环境的抗干扰能力。仿真结果验证了所提方法的有效性。
In order to solve the problem of digital radio-frequency memory(DRFM)repeater main lobe jam‑ming in the complex electromagnetic interference environment,based on the digital array with independent and controllable elements of each antenna array,a method for solving the problem of anti-DRFM repeater main lobe interference based on FDA digital array is proposed.At the transmitter,there is a small frequency offset between the carrier frequencies of each transmit array element.When receiving,the equivalent transmit pattern of two-dimensional range-angle coupling can be obtained after the array input signals are separated by matched filter banks.According to this feature,the true and false targets can be distinguished in the range dimension.Then the capon spectrum is used to form interference nulling to suppress jamming in the range dimension.This method can effectively suppress the DRFM repeater main lobe range deception interference and can improve the anti-jamming ability of digital array in complex electromagnetic environment.Simulation results verify the availability of the proposed method.
作者
张青鑫
陈东
Zhang Qingxin;Chen Dong(Guizhou Space Electronic Technology Co.,Ltd.,Guiyang 550009,Guizhou,China)
出处
《航天电子对抗》
2021年第4期44-47,共4页
Aerospace Electronic Warfare
关键词
频率分集(FDA)
主瓣干扰
频率偏移
数字阵列
frequency diverse array(FDA)
main lobe jamming
frequency offset
digital array
