基于 Hough 变换的多频分量的 LFM 信号的检测

摘要

LFM is a typical non-stationary signal ,of which Wigner-Ville time-frequency distribution expresses an obvi-ous line form distribute characteristic .Hough transform is a kind of straight line integral cast shadow transformation ,which can suppress noise detection signal through using make line integral calculus with the result to the WV transformation .Simu-lation results indicate that Hough transform can detect multi-component LFM signal in the certain SNR ,detect exactly with 0dB Gauss white noise for two-component LFM signal .%LFM信号是一种典型的非平稳信号，其Wigner-Ville时频分布表现出明显的线状分布特征。 Hough变换是一种直线积分投影变换，利用Hough变换可以对WV变换的结果进行线积分，从而实现抑制噪声检测信号的目的。计算机仿真试验表明Hough变换可以在一定信噪比情况下实现多分量的LFM 信号检测，对两分量的LFM信号，可以作到0dB高斯白噪声下的准确检测。