摘要
天空双基地预警雷达常采用高脉冲重复频率,由此带来的距离模糊对杂波功率谱会产生一定的影响。针对该问题,首先分析了天空双基地预警雷达的几何关系,然后建立了杂波模型并给出了距离模糊下的杂波协方差矩阵,最后通过仿真分析了不同收发球心角下模糊距离环的分布情况,以及不同收发球心角和飞行方向构型下距离模糊对杂波功率谱的影响。仿真结果表明距离模糊的分布情况主要由收发球心角决定,距离模糊使天空双基地预警雷达杂波频谱严重展宽,自由度增加。研究成果可为距离模糊下的杂波抑制技术提供技术支撑。
High pulse repetition frequency is often used in space-air based bistatic radar,which brings range ambiguity causing certain impact on clutter power spectrum.In view of this issue,firstly,the geometric relations of space-air based bistatic radar are analyzed,based on which a clutter model is established.Next the clutter covariance matrix considering range ambiguity is given.Finally,the distribution of range ambiguity under different sphere central angles and the impact of range ambiguity on clutter power spectrum under different sphere central angles and flight direction configurations are analyzed through simulation.The results show that distribution of range ambiguity is mainly determined by sphere central angle,and the range ambiguity causes the stretching of clutter spectrum and increasing of degree of freedom.The research results can provide technical support for clutter suppression technology under range ambiguity.
作者
王悦
袁俊泉
黄忠言
温建雄
WANG Yue;YUAN Jun-quan;HUANG Zhong-yan;WEN Jian-xiong(Air Force Early Warning Academy,Hubei Wuhan 430019,China)
出处
《现代防御技术》
2019年第2期66-72,共7页
Modern Defence Technology
基金
学院科研创新基金重大基础研究专项课题(ZDJC0102)
关键词
天空双基地预警雷达
距离模糊
等距离环
功率谱
收发球心角
飞行方向
space-air based bistatic radar(SABBR)
range ambiguity
equidistant ring
power spectrum
sphere central angle
flight direction
