摘要
利用机载辐射源照射的非合作探测系统相对于调频广播辐射源照射更具优势,但同时也面临一系列问题,其中最主要的问题是如何有效抑制强杂波。对机载辐射源条件下杂波建立了数学模型,研究了杂波的时-频分布特性,仿真了不同速度矢量条件下的杂波空时二维特性。通过杂波子空间分析,对杂波子空间和杂波特征谱特性进行了数值仿真,掌握了杂波自由度与杂波分布特性变化之间的关系。最后,介绍了空时自适应滤波的原理和算法结构,并仿真验证了该方法对杂波的抑制效果。
Non-cooperative bistatic radar system based on airborne emitter has more advantages than FM broadcast emitter,but it also faces a series of problems,and the most important one is how to eliminate clutter influence. Firstly,the clutter mathematics model based on airborne emitter is built,and the clutter time-frequency characteristic is studied. At the same time,the clutter space-time characteristic of different velocity vector is simulated. Based on the analysis of clutter subspace,a numerical simulation about the clutter subspace and space-time characteristic is presented. The relationship between degree of clutter freedom and clutter distribution characteristic change is mastered. The theory and algorithm structure of space-time adaptive processing( STAP) are presented,and the suppression effect of this method on clutter is verified with simulation.
作者
胡蜀徽
罗昀
邱海宾
罗文波
HU Shu-hui;LUO Yun;QIU Hai-bin;LUO Wen-bo(Electronic Equipment Research Institute of Southwest,Sichuan Chengdu 610036,China)
出处
《现代防御技术》
2019年第1期90-96,共7页
Modern Defence Technology
关键词
机载辐射源
非合作
空时特性
杂波子空间
杂波自由度
空时自适应滤波
airborne emitter
non-cooperative
space-time characteristic
clutter subspace
clutter degrees
space-time adaptive processing(STAP)
作者简介
第一作者:胡蜀徽(1983-),男,四川成都人。工程师,硕士,主要从事天线阵列设计、雷达信号处理研究。通信地址:610000四川省成都市犀浦百草路1181号四威产业园E-mail:435488318@qq.com
