数字电视辐射源雷达基于空域滤波的直达波获取  

Direct-Path Signal Obtaining to Digital Video Broadcasting Transmitter Radar Based on the Spatial Filtering

作　　者：吴海洲[1] 陶然[1] 单涛[1] 

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《兵工学报》2009年第2期226-230,共5页Acta Armamentarii

基　　金：国家自然科学基金资助项目(60232010);国家部委预研项目(A2220060039);北京理工大学优秀青年教师资助计划(2007YS0101)

摘　　要：在以数字电视广播为照射源的外辐射源雷达系统中,直达波的获取对系统性能有重要影响。本文提出先做波达方向(DOA)估计,再做空域滤波来抑制多发射站带来的干扰。DOA估计时,采用前向或前后向平滑的方法解相关。空域滤波时,针对外辐射源雷达的具体应用,本文将普通的宽零陷算法推广到形成多个宽零陷和主波束指向可变的情况。根据等距线阵的特点此算法可简化计算,便于实时实现。通过计算机仿真,证明采用该算法对多发射站(或多径)干扰有很好的抑制效果。The direct-path signal obtaining is important to system performance in passive radar based on digital video broadcasting illuminator.It was proposed that direction of arrival wave（DOA） is estimated,then spatial filtering is performed,to suppress interference brought by the multiple-transmitter.For DOA estimation,the forward or forward-backward spatial smoothing techniques were adopted to solve coherent signals.For spatial filtering,the ordinary broad null algorithm was extended into forming multiple broad nulls and flexible beam pointing according to the character of the passive radar.In addition,the complexity of the arithmetic can be simplified for real-time realization as the uniform linear array is used.The simulated results show that the algorithm can better suppress interference brought by the multiple-transmitter.

关 键 词：雷达工程 单频网 波达方向估计 波束形成 宽零陷 

分 类 号：TN958.97[电子电信—信号与信息处理]