匹配模板法在雷达信号识别中的应用

雷达采用低截获概率(LPI)技术之后,特别是在低信噪比条件下,传统的基于参数提取的雷达信号识别方法将会失效。数字接收机的研制与投入使用,开辟了信号截获识别的新思路。如果在先期情报侦察中截获雷达信号并且成功识别,那么就可以将该雷达中频采样数据保存下来制作为匹配模板,当该雷达信号再次出现时,即使信噪比较低,也可以完成匹配接收,截获的同时便完成信号识别。采用实际截获的雷达信号制作成匹配模板进行计算机仿真实验,当其中的某一雷达信号再次出现时,匹配模板成功截获,实验结果验证了该方法的有效性与可行性。

Application of Matching Template in Radar Signal Recognition

When a radar adopts low probability of interception(LPI) technology,especially under the condition of low SNR,traditional radar signal recognition based on parameter distillation will lose its effect.Digital receiver's development inaugurates new methods in signal interception and recognition.If radar signals were intercepted and analyzed successfully during intelligence reconnaissance in advance,radar IF sampling data could be stored for making matching templates.When the signal appears again,even if the SNR is lower,matching template can achieve matching interception.Interception and recognition are completed at the same time.Real intercepted radar signals are made into matching templates for computer simulation.When one of the radar signals appears again,it can be intercepted successfully by matching template.Experiments validates that this method is effective and feasible.