Watersheds in Digital Spaces: An Efficient Algorithm Based on Immersion Simulations
IEEE Transactions on Pattern Analysis and Machine Intelligence
Time-frequency signal processing based on the Wigner-Weyl framework
Signal Processing
IEEE Transactions on Signal Processing
Localization of the complex spectrum: the S transform
IEEE Transactions on Signal Processing
The chirplet transform: physical considerations
IEEE Transactions on Signal Processing
An adaptive optimal-kernel time-frequency representation
IEEE Transactions on Signal Processing
Unitary equivalence: a new twist on signal processing
IEEE Transactions on Signal Processing
Group delay shift covariant quadratic time-frequencyrepresentations
IEEE Transactions on Signal Processing
Analysis of multicomponent LFM signals by a combined Wigner-Houghtransform
IEEE Transactions on Signal Processing
Discrete Time-Frequency Characterizations of Dispersive Linear Time-Varying Systems
IEEE Transactions on Signal Processing
Matching pursuits with a wave-based dictionary
IEEE Transactions on Signal Processing
A four-parameter atomic decomposition of chirplets
IEEE Transactions on Signal Processing
Underwater broadband source localization based on modal filtering and features extraction
EURASIP Journal on Advances in Signal Processing - Special issue on advances in signal processing for maritime applications
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We propose time-frequency methods to filter dispersive guided wave signals. Guided waves occur in acoustical propagation (oceanic waveguides), geophysics (layered medium), or optics (dielectric optical waveguides). In waveguides, signals can be decomposed into normal modes which contain information on environmental parameters and source localization. As modes present nonlinear time-frequency evolution, modal filtering is not possible with conventional tools. To overcome the difficulty presented by these nonlinearties, we have developed matched tools: matched frequency and time-frequency representations and the modal filterings associated with these representations. The tools developed are based on unitary equivalence principle. Performance and robustness of different proposed modal filters are evaluated and compared. All of these tools can be used for both source localization and environmental inversion.