摘要
当导弹处于低空尾追攻击时,实现强副瓣杂波中弱小雷达目标检测给弹载雷达信号处理提出了一定挑战。为改善信杂比、提高检测性能,引入近年发展起来的随机共振技术。文中在介绍随机共振原理并分析脉冲多普勒雷达回波频谱特性的基础上,提出了基于随机共振原理的脉冲多普勒雷达弱小目标检测方法,并给出了检测算法流程,进而在理论上分析了该算法的检测性能。仿真实验表明,该算法有效提高了信杂比,对于脉冲多普勒体制下的弱小目标信号检测有显著效果。
Dim signal detection is chanllenging due to the fact that the signal is submerged by the powerful sidelobe clutter, while the pulse Dopple （PD） radar is following the target. Stochastic resonance principle is made good use of to improve the signal noise ratio and the detection performance. Firstly, the basic principle of stochastic resonance is introduced, and the frequency spectrum characteristic of the return signals is analyzed while the radar is after the target. Then a novel approach based upon stochastic reso- nance principle for detecting a single dim signal of pulse Doppler radar is proposed, and the procedure is given in the paper. The performance of signal noise ratio improvement is thus analyzed theoretically. Finally, the simulation results show that the proposed algorithm possesses a high gain for siganl noise ratio, which is very attractive for dim sigal detection of pulse Doppler radar.
出处
《现代雷达》
CSCD
北大核心
2011年第3期34-38,共5页
Modern Radar
基金
国防科技重点实验室基金资助项目
