DIGITAL BISPECTRAL ANALYSIS AND ITS APPLICATIONS TO NON-LINEAR WAVE INTERACTIONS

被引：677

作者：

KIM, YC ^{[1
]}

POWERS, EJ ^{[1
]}

机构：

[1] UNIV TEXAS, ELECTR RES CTR, AUSTIN, TX 78712 USA

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 1979年 / 7卷 / 02期

关键词：

D O I：

10.1109/TPS.1979.4317207

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The bispectrum, which is an ensemble average of a product of three spectral components, is shown to be a very useful diagnostic tool in experimental studies of nonlinear wave interactions in random media. In particular, it is shown that the bicoherence spectrum may be used to discriminate between nonlinearly coupled waves and spontaneously excited waves and to measure the fraction of wave power due to the quadratic wave coupling in a self-excited fluctuation spectrum. Practical aspects of digital bispectral analysis techniques, such as estimation and statistical variability of the estimator, are also discussed. Finally, applications of bispectral analysis techniques in the analysis and interpretation of plasma fluctuation data are described. Copyright © 1979 by The Institute of Electrical and Electronics Engineers, Inc.

引用

页码：120 / 131

页数：12

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