满蔚仕,王晋国,傅君眉,申屠江民
MAN Wei-shi~1,WANG Jin-guo~2,FU Jun-mei~1,SHEN-TU Jiang-min~3(1.Xi′an Jiaotong University

• 1:西安交通大学电子与信息工程学院微波所
• 2:长安大学应用物理系
• 3:西安交通大学电子与信息工程学院微波所
• 4:浙江金徕镀膜有限公司 陕西西安710049

摘要(Abstract)：

利用时频分析研究瞬变测深中的瞬变信号,已有多种方法给出了定性的结果。但更深入的获取瞬变测深中的地下信息,还需给出定量描述。本文利用S变换和广义S变换研究了瞬变测深信号,并与其他结果做了比较,给出了S变换下瞬时频率(IF)估计的方法。利用这种方法研究了瞬变测深,同时讨论了瞬变测深信号在S域的去噪问题。理论模型与实例均给出了理想的结果。
Several papers have given the pilot study of transient electromagnetic(TEM) field signals using joint time-frequency analysis(JTFA).However,all the JTFA methods have their advantages and disadvantages,and for deep insight the information in TEM the comparison between these methods and newly presented S-transform is necessary.This paper first uses S-transform and generalized Stransform processing transient electromagnetic(TEM) signal.Secondly,gives a method of evaluation instantaneous frequency(IF) using S-transform and give the result of the comparison.Thirdly,it gives a character of TEM diffuse by using IF.In the end this paper discuss the denoise in S-domain.

关键词(KeyWords)： 瞬变电磁场;时-频分析;S变换;瞬时频率
transient electromagnetic field;time-frequency analysis;S-transform;instantaneous frequency

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目资助(40374052)

作者(Author): 满蔚仕,王晋国,傅君眉,申屠江民
MAN Wei-shi~1,WANG Jin-guo~2,FU Jun-mei~1,SHEN-TU Jiang-min~3(1.Xi′an Jiaotong University

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