摘要
圆柱型阵天线相对于常规的平面阵天线具有空间全方位扫描、搜索跟踪方式灵活和波束方向性好等优点。该文首先从圆柱型阵机载雷达杂波协方差矩阵特征值分布和杂波功率谱距离向分布两个方面分析了圆柱型阵列与均匀平面阵列之间的区别,得到杂波功率谱随距离变化的结论。然后根据圆柱型阵机载雷达杂波分布特点提出了两种不同的杂波抑制方法,它们能够很好地解决圆柱型阵机载雷达杂波距离向分布非均匀的问题。最后通过仿真实验验证了该文方法的正确性。
Cylindrical array antennas have three merits relative to common planar array antennas such as all-orientation space scanning, flexible search and track mode and good beam bearing etc. In this paper, firstly the differences between cylindrical array and uniform planar array are discussed in terms of eigenvalue distribution of the clutter covariance matrix and clutter distribution at range, and the conclusion of space-time clutter spectrum＇s nonhomogeneity at range for airborne radar with cylindrical array antennas is gained. Secondly two different clutter suppression methods are proposed according to the clutter characteristic of airborne radar with cylindrical array antennas, which can resolve the problem of clutter spectrum＇s nonhomogeneity at range. Finally, the simulation results verify the correctness of the proposed methods.
出处
《电子与信息学报》
EI
CSCD
北大核心
2007年第10期2371-2374,共4页
Journal of Electronics & Information Technology
基金
国家部级基金
教育部高等院校青年教师教学科研奖励计划(TRA POYT)资助课题
关键词
圆柱型阵天线
机载雷达
杂波抑制
空域角频移
协方差矩阵加权
Cylindrical array antennas
Airborne radar
Clutter suppression
Space angular frequency shift
Covariance Matrix Taper （CMT）
作者简介
谢文冲：男，1978年生，助教，博士生，研究方向为空时二维信号处理及SAR成像．
王永良：男，1965年生，教授，博士生导师，长期从事空时信号处理、阵列信号处理和自适应信号处理等领域的研究．
