摘要
低空目标在地平面下的镜像,是雷达仰角测量的主要误差源,对雷达检测和跟踪都造成了严重影响。在低空"远距离区",目标及其镜像构成了一个两点源角闪烁模型。利用两点源角闪烁线偏差曲线关于相对系数幅度的对称性,对极化分集方式进行了设计,可更为有效地降低角闪烁误差。分析了角闪烁抑制性能与目标、镜像散射矩阵的关系,对本文提出的极化分集方式与其它分集方式进行了仿真比较,证明其具有更好的低空镜像角闪烁抑制性能。
The underground enantiomorphous target of the low-altitude radar target is the primary error fountain for radar pitching angle measurement, and brings on the severe influence for radar detecting and tracking. When the low-altitude target locates the ＇ far-distance region＇, target and enantiomorphous target can be regarded as two-point glint model. With the symmetry about the relative coefficient＇s amplitude of the two-point glint error curve, the mode of polarization diversity which can effectly depress the error variance is designed. The relation of the performance of restraining glint and target, enantiomorphous target＇s scattering matrix is analyzed. The simulation test compares the performances of polarization diversity and other diversity mode, and the result show the advantage of the method about the depressing of the angle glint of low-altitude enantiomorphous target.
出处
《电波科学学报》
EI
CSCD
北大核心
2008年第6期1038-1044,共7页
Chinese Journal of Radio Science
基金
国防预研基金项目(51403010403KG0173)
关键词
角闪烁
抑制
极化分集
glint
restrain
polarization diversity
