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基于Warping变换的波导时频分析
引用本文:鹿力成,马力.基于Warping变换的波导时频分析[J].物理学报,2015,64(2):24305-024305.
作者姓名:鹿力成  马力
作者单位:1. 中国科学院水声环境特性重点实验室, 北京 100190; 2. 中国科学院声学研究所, 北京 100190
摘    要:海洋波导的存在使得信号在水中传播过程中产生频散, 从而降低了信号处理质量. 基于声场的波导不变特性, 给出了一种具有普遍意义的Warping变换, 这种变换可以将波导中的信号频散特性简单化. 数值仿真结果表明, 只需要知道波导不变量的取值范围就可以很好地提取出波导的频散曲线, 数值仿真和海上实验数据给出了较为理想的结果.

关 键 词:波导不变量  Warping  变换  频散曲线
收稿时间:2014-03-28

Analysis of waveguide time-frequency based on Warping transform
Lu Li-Cheng,Ma Li.Analysis of waveguide time-frequency based on Warping transform[J].Acta Physica Sinica,2015,64(2):24305-024305.
Authors:Lu Li-Cheng  Ma Li
Institution:1. Key Laboratory of Underwater Acoustic Environment, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China; 2. Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
Abstract:Sound propagation in underwater will induce dispersion due to the natural sea waveguide, and then it will degrade the results of the signal processing. Based on the waveguide invariant, a general warping transform is presented. This warping transform could extract the waveguide mode dispersion curve and remove the effect of the waveguide dispersion. Results from the simulation and experiment show that the transform woks well.
Keywords:waveguide invariant  Warping transform  frequency dispersion curve
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