| 基于重排Gabor 变换的高分辨率谱分解 |
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| 引用本文： | 周家雄,张国栋,尚帅.基于重排Gabor 变换的高分辨率谱分解[J].世界地质,2013,32(1):153-158. |
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| 作者姓名： | 周家雄 张国栋 尚帅 |
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| 作者单位： | 1. 中国地质大学资源学院，武汉430074; 2. 吉林大学地球探测科学与技术学院，长春130026; 3. 中海石油( 中国) 有限公司湛江分公司，广东湛江524057 |
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| 摘 要： | 地震信号是随机信号，频率成分随着时间变化而变化。Gabor 变换是加窗傅里叶变换的一种，被广泛用于信号的时频分析，但分辨率有限。本文引入一种基于能量重排的Gabor 变换，在时频平面上对能量关于其重心进行重排，提高了时频分析的分辨率。通过理论算例和实际数据证明，重排后的 Gabor 变换谱分解在烃类检测中有更好的时频分辨率，分层更准确，更精细地指示了烃类的存在。
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| 关 键 词： | 重排Gabor 变换 高分辨率 谱分解 |
High-resolution spectrum decomposition based on reassigned Gabor transform |
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| ZHOU Jia-xiong
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ZHANG Guo-dong
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SHANG Shuai.High-resolution spectrum decomposition based on reassigned Gabor transform[J].World Geology,2013,32(1):153-158. |
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| Authors: | ZHOU Jia-xiong ZHANG Guo-dong SHANG Shuai |
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| Institution: | 1. Faculty of Earth Resources，China University of Geosciences，Wuhan 430074，China; 2. College of Geo-exploration Science and Technology，Jilin University，Changchun 130026，China; 3. Zhanjiang Branch of CNOOC Ltd． ，Zhanjiang 524057，Guangdong，China |
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| Abstract: | The seismic signal is random signal． Its frequency is variable with time． Gabor transform method， a STFT being used in time-frequency analysis，is limited in time-frequency resolution． We introduce a reassigned Gabor transform，which assigns the total energy to the center of gravity on the time-frequency plane，to improve the resolution． The theoretical and real data examples show that the reassigned Gabor method has much higher time-frequency resolution，providing more detailed stratification and more accurate detection of the hydrocarbons． |
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| Keywords: | reassigned Gabor transform high resolution specturm decomposition |
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