基于Radon-Ambiguity变换的反辐射导弹检测方法

Detection of Anti-Radiation Missile Based on Radon-Ambiguity Transform

分析了反辐射导弹（ARM）的回波信号模型，介绍了用Radon-Ambiguity变换（RAT）检测LFM信号的原理。分析结果表明，ARM的检测实质上是在强单频分量和噪声背景下检测弱LFM分量。为了克服载机强分量对ARM弱分量检测的影响，文章结合逐次消去思想提出了基于RAT变换的ARM检测算法。该算法能在较低的信噪比条件下有效地检测ARM。仿真实验证明了该算法的有效性。

The radar echo signal model of anti-radiation missile （ARM） is analyzed and the basic method of LFM signal detection using the Radon-Ambiguity transform （RAT） is introduced. The analysis results show that the detection of ARM is actually detection of weak linear frequency modulated （LFM） signal embedded in strong sinusoid component and noise. In order to eliminate the detection effect of strong sinusoid component of carrier aircraft on ARM weak signal, and by using frequency domain filtering technique, a novel algorithm for ARM detection based on RAT is proposed.The effectiveness of this method is illustrated by simulation.