Time-frequency modeling of shallow water environment: rigid vs. fluid seabed

Jun Zhang (1) , Bertrand Gottin (2) , Antonia Papandreou-Suppappola (1) , Cornel Ioana (2)

1 SenSIP - Sensor Signal and Information Processing Center
2 GIPSA-SIGMAPHY - GIPSA - Signal Images Physique

When the ocean seabed is considered to be rigid, the ideal waveguide model can be used to model the shallow water environment. However, a more realistic ocean waveguide model treats the ocean floor as a boundary between two different fluid media. In this paper, a frequency-domain characterization of shallow water environments is proposed based on this realistic waveguide model with a fluid boundary. First, the time-frequency characteristics of this model are studied as well as the impact of the environment parameters on the dispersive phenomena. Then a frequency-domain matched filter receiver is designed to obtain time-dispersion diversity once we separate the modes using warping techniques in the time-frequency plane. Simulations demonstrate that the new receiver design improves the bit error rate performance.

Domains: Signal and Image Processing; Signal and Image processing

Jun Zhang, Bertrand Gottin, Antonia Papandreou-Suppappola, Cornel Ioana. Time-frequency modeling of shallow water environment: rigid vs. fluid seabed. SSP 2007 - 2007 IEEE workshop on Statistical Signal Processing, Aug 2007, Madison, WI, United States. ⟨hal-00326350⟩