大基线组网雷达点源干扰信号自适应对消方法研究
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摘要
采用传统方法处理单点辐射源环境下的大基线组网雷达的干扰对消问题时,存在干扰波达方向变化影响目标检测性能的问题。为此,提出了一种基于双节点信号的自适应对消处理方法,有效抑制了点源信号,实现了目标的有效探测。本文首先建立了单点辐射源环境下,大基线组网雷达系统的回波信号模型,然后依据模型的特点,提出了一种相参对消和非相参积累相结合的信号处理方法。在消去辐射源信号的同时,实现目标能量的有效累积。针对典型目标和雷达工作场景,对算法进行了仿真分析。初步的仿真结果表明,该方法能够在单点辐射源环境下,实现目标回波能量的有效积累并完成目标检测,有极大的应用前景。
Aiming at reliable target detection in large-baseline radar network,which is interfered by a single point radiation source,a dual-node adaptive cancellation method was proposed. This paper first established the echo signal model of a large baseline radar system under such environment. Then,based on the characteristics,a method combining coherent cancellation and non-coherent accumulation was derived. The proposed method was simulated and analyzed for the typical target and working scene. The preliminary results show that this method can achieve effective accumulation of target energy and cancellation of radiation source simultaneously,which has great application prospects.
Aiming at reliable target detection in large-baseline radar network,which is interfered by a single point radiation source,a dual-node adaptive cancellation method was proposed. This paper first established the echo signal model of a large baseline radar system under such environment. Then,based on the characteristics,a method combining coherent cancellation and non-coherent accumulation was derived. The proposed method was simulated and analyzed for the typical target and working scene. The preliminary results show that this method can achieve effective accumulation of target energy and cancellation of radiation source simultaneously,which has great application prospects.
引文
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[2]Haimovich A M,Blum R S,Cimini L J.MIMO Radar with Widely Separated Antennas[J].IEEE Signal Processing Magazine,2008,25(1):116-129.
[3]张宗傲.阵列雷达自适应主瓣干扰抑制算法研究[D].北京:北京理工大学,2015.Zhang Zongao.Array radar adaptive main lobe interference suppression algorithm[D].Beijing:Beijing Institute of Technology,2015.(in Chinese)
[4]Horowitz L J,Blatt H,et al.Controlling adaptive antenna arrays with the sample matrix inversion algorithm[J].IEEE Tram Aerosp Lecton Syst,1978,10(5):840-847.
[5]Lorenz R G,Boyd S P.Robust minimum variance beamforming[J].IEEE Trans.Signal Process,2005,53(5):1684-1696.
[6]Hassanien A,Vorobyov S A,Wong K M.Robust adaptive beamforming using sequential quadratic programming:An iterative solution to the mismatch problem[J].IEEE Signal Process,2008,15:733-736.
[7]Mallipeddi R,Lie J P,Razul S G,et al.Robust adaptive beamforming based on covariance matrix reconstruction for look direction mismatch[J].Progress In Electromagnetics Research,2011,25:37-46.
[8]Deligiannis A,Rossetti G,Panoui A,et al.Power allocation game between a radar network and multiple jammers[C]∥Radar Conference(Radar Conf),2016IEEE.IEEE,2016:1-5.
[9]Vendik O G,Kozlov D S.Phased antenna array with a sidelobe cancellation for suppression of jamming[J].IEEEAntennas and Wireless Propagation Letters,2012,11:648-650.
[10]李荣锋,王永良,万山虎.一种在主瓣干扰条件下稳健的自适应波束形成方法[J].系统工程与电子技术,2002,24(7):61-64.Li Rongfeng,Wang Yongliang,Wan Shanhu.Robust adaptive beam forming under main lobe interference conditions[J].Systems Engineering and Electronics,2002,24(7):61-64.(in Chinese)