Radar LFM signal detection and estimation based on Gabor-Radon transform in low SNR
基于Gabor-Radon变换的低信噪比雷达LFM信号检测与估计

In order to overcome the deficiency of radar linear frequency-modulated (LFM) signal detection and estimation, a method based on Gabor-Radon transformation was proposed. Through computing Gabor transform of the radar echoes, the 2D time-frequency distribution including strong noise and weak target LFM echoes were obtained. Then, using the characteristic that the Radon transform can fast detect beeline and brim and its strong anti-noise characteristic, the weak LFM echoes were detected. The appropriate threshold was set for denoising time-frequency distribution and time-domain waveform by inverse Gabor transform. Simulation result verifies that this method can effectively detect LFM signal in low SNR.