基于多次小波变换的小波域阈值地震信号去噪  

Denoise of Wavelet Domain Threshold Value Seismic Data by Multi-Wavelet Transform

作　　者：徐维秀[1] 岳继光[1] 吴继伟[1] 萧蕴诗[1] 

机构地区：[1]同济大学控制科学与工程系,上海200092

出　　处：《新疆石油地质》2007年第6期764-767,共4页Xinjiang Petroleum Geology

基　　金：国家863项目;滩浅海地区高精度地震勘探技术(2001AA602018)资助

摘　　要：在常规小波域阈值信号去噪方法的基础上,提出了基于多次小波变换的小波域阈值地震信号去噪方法。根据小波变换下信号和噪声在多尺度空间中的不同特性,对不同尺度下的小波系数用阈值处理,改进了多次小波变换应用于地震信号去噪的方法。数据仿真和实际应用表明,该方法可以有效压制随机干扰,对提高地震记录的信噪比和分辨率都有较好的效果。Followed the analysis of conventional denoising method by threshold filter on wavelet domain, a seismic data denoising method by threshold filter on wavelet domain based on multi-wavelet transform is proposed. Based on the feature difference between signal and noise on multi-measure domain in wavelet transform, processing the wavelet coefficients in the different measures with thresholds filter, multi-wavelet transform can be improved without losing original signals. Seismic data simulation and practical processing indicate that this method can be used to press random interferences and effectively improve the signal-noise ratio and the resolution of seismic data.

关 键 词：地震波 干扰 噪声 信号 分辨率 

分 类 号：P631.443[天文地球—地质矿产勘探]