| 轻便可控震源相关子波吉伯斯现象的抑制 |
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| 引用本文： | 孙明,林君.轻便可控震源相关子波吉伯斯现象的抑制[J].佛山科学技术学院学报(自然科学版),2009,27(3):9-12. |
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| 作者姓名： | 孙明 林君 |
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| 作者单位： | 1. 佛山科学技术学院,电子信息工程系,广东,佛山,528000
2. 吉林大学,仪器科学与电气工程学院,吉林,长春,130026 |
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| 基金项目： | 中国科学院王宽诚博士后工作奖励基金 |
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| 摘 要： | 可控震源系统采用了相关技术,能有效地抑制随机噪声及环境噪声,提高信噪比;同时相关技术的应用造成了子波旁瓣的增大及频谱泄露,并产生吉伯斯现象,从而降低了勘探分辨率.通过余弦平方窗函数的应用,旁瓣得到了明显的抑制,但主瓣的宽度相应增大.
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| 关 键 词： | 可控震源 相关 子波 吉伯斯现象 抑制 |
On Gibb's phenomenon supperssion of correalation wavelet in a high-resolution portable electromagnetic vibroseis |
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| SUN Ming,LING Jun.On Gibb''''s phenomenon supperssion of correalation wavelet in a high-resolution portable electromagnetic vibroseis[J].Journal of Foshan University(Natural Science Edition),2009,27(3):9-12. |
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| Authors: | SUN Ming LING Jun |
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| Affiliation: | 1.Department of Electronics and Information Engineering;Foshan University;Foshan 528000;China;2.School of Instrument Science and Electric Engineering;Jilin University;Changchun 130026;China |
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| Abstract: | By adopting correlation technique in vibrator system,random noise and ambient noise are restrained,therefore signals to noise ratio are improved greatly.Despite the advantages of vibroseis correlation,wavelet sidelobes become wide and in Gibb's phenomena its spectrum arises.Consequently the resolution is reduced.After a cosine-squared taper is applied,sidelobes can be significantly suppressed,at the same time,the bandwidth of the major lobe increases. |
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| Keywords: | vibroseis correlation wavelet Gibb's phenomenon suppression |
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