摘要
分析了使用自相关和反向预测技术从被噪声淹没的信号中检测出信噪比 ,以判定有无雷达信号存在的方法。分析了利用接收到的雷达直接辐射信号找出由目标反射的雷达信号的延迟时间 ,以及反射信号能量的互相关方法。最后 ,以仿真例子验证了分析结果的正确性 ,进而说明了这两种技术在低截获概率雷达侦察和仿多基地雷达机制的被动定位方面的应用前景。
A new idea in EW receiver is analyzed in this paper. Firstly, the method of using auto-correlation and reverse prediction to detect the existence of a signal under very low S/N ratio is discussed. Secondly, the derived method is proposed which can be used to estimate the arrival time difference between the reflected echoes and the original directly arrived pulse signal as well as the energy of the echoes. Simulation samples are also given in the paper to validate the effectiveness of proposed methods. The good application of new technique in detecting weak radar signal and passive locating can be found by means of the mechanism of multi-based radar.\;
出处
《系统工程与电子技术》
EI
CSCD
2000年第6期25-28,共4页
Systems Engineering and Electronics
