摘要
针对如何有效去除探地雷达信号的干扰噪声问题,提出了一种基于小波和脊波变换的杂波抑制方法。小波能有效地描述图像的点奇异性,而脊波能有效地描述图像的线奇异性。首先结合小波和脊波的特点,对探地雷达回波信号进行自适应阈值去噪,然后利用脊波的方向敏感性在脊波域去除直达波信号,最终通过处理实际探底雷达数据,验证算法的有效性。
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.
出处
《电子科技》
2015年第7期1-4,共4页
Electronic Science and Technology
基金
国家自然科学基金资助项目(61340040
61102095)
陕西省自然科学基础研究计划基金资助项目(2012JQ8045)
陕西省教育厅科学研究项目计划基金资助(2013JK1131
2014JK1670)
西安邮电大学中青年教师科研基金资助项目(ZL2011-03
ZL2014-03)
关键词
脊波变换
探地雷达
背景噪声
杂波抑制
ridgelet transform
ground penetrating radar
background noise
clutter reduction
