关键词: 脊波变换, 探地雷达, 背景噪声, 杂波抑制

Abstract:

A clutter reduction method based on wavelet transform and ridgelet transform for ground penetrating radar signal is proposed.Wavelet transform can express images of point singularities with the best approximation.Ridgelet can express images of straight edges with sparse coefficients perfectly.Firstly the random noise is suppressed by an adaptive threshold denoising method,combined with the characteristics of wavelet transform and ridgelet transform.Then the direct wave is removed from the ridgelet domain by employing the directional sensitivity of the ridgelet transform.The efficiency of the algorithm has been demonstrated by processing practical GPR data.

Key words: ridgelet transform;ground penetrating radar;background noise;clutter reduction