摘要
具有空时自适应处理技术(STAP)的机载雷达从空时二维联合域处理信号,而传统干扰方法因信号维度单一性很难产生有效干扰效果。文中针对STAP处理器抗干扰特性,提出一种具有空时二维特性的投散射式伪杂波干扰新技术,根据多普勒频率对方位的依从关系,向地面投射干扰信号,利用地面散射特性产生与地杂波特性相似的伪杂波干扰信号。分析了该干扰信号的空时矢量模型,研究了干扰信号二维功率谱的轨迹可控性问题。该干扰信号在空时二维空间上呈现不与杂波轨迹重合的刀背式分布,多普勒轨迹可控,能控制干扰信号的二维功率谱始终覆盖在被保护目标上。仿真实验结果显示:处理器改善因子降低,杂波谱畸变,证明了该干扰方法的有效性。
The airborne radar equipted with space-time adaptive processing technology processing signals in two dimensional space-time domain, it is difficult to be disturbed by traditional jamming method with single dimension signal. Contraposing the anti-jamming feature of STAP, a kind of noval scattered wave jamming method for airborne radar within space-time adaptive processing technology is proposed in this paper. According to the compliance relationship between Doppler frequency and azimuth, the fake clutter jamming signal is generated by utilizing the scattered character of the ground. The jamming signal space-time vector model is analyzed and the minimum variance power spectrum controllability of jamming signal is discussed. The scattered wave jamming signal presents blade distribution and doesenl coincide with clutter in two dimensional space. The Doppler trace can be modified by computer to cover the target. Thus, radar would be interfered as well as the target and jammer would be protected. The simulation results show that the im-provement factor is decreased and the clutter spectrum is distorted, which proves that the jamming method is valid.
出处
《现代雷达》
CSCD
北大核心
2016年第10期83-87,共5页
Modern Radar
关键词
投散射
杂波
空时矢量
多普勒
scatter
clut ter
space-time vector
Doppler
