Title :
Analysis of non-stationary mode coupling by means of wavelet-bicoherence
Author :
Larsen, Yngvar ; Hanssen, Alfred ; Pécseli, Hans L.
Author_Institution :
Dept. of Phys., Tromso Univ., Norway
Abstract :
We present a definition of wavelet bicoherence based on wavelet polyspectra. We propose a simple estimator for wavelet bicoherence, and discuss its statistical properties. In particular it is shown that wavelet bicoherence estimation has a larger number of effective degrees of freedom than traditional Fourier-based bicoherence estimation. The proposed estimator is applied to detection of coherent couplings in rocket measurements from the ionospheric E-region. It is concluded that wavelet bicoherence is a tool well-suited for analysis of non-stationary mode coupling
Keywords :
plasma electrostatic waves; spectral analysis; statistical analysis; wavelet transforms; ionospheric E-region; non-stationary mode coupling; rocket measurements; statistical properties; wavelet bicoherence estimates; wavelet polyspectra; Continuous wavelet transforms; Electrostatic measurements; Fourier transforms; Frequency; Linearity; Physics; Rockets; Signal analysis; Wavelet analysis; Wavelet transforms;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP '01). 2001 IEEE International Conference on
Conference_Location :
Salt Lake City, UT
Print_ISBN :
0-7803-7041-4
DOI :
10.1109/ICASSP.2001.940616
