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This paper represents generation of time-varying underwater acoustic channels by performingscattering simulation with time-varying ocean surface and Kirchhoff approximation. In order to estimate thetime-varying ocean surface, 1D Pierson-Moskowitz ocean power spectrum and Gaussian correlation functionwere used. The computed scattering coefficients are applied to the amplitudes of each impulse of BELLHOPsimulation result. The scattering coefficients are then compared with measured doppler spectral density of signalcomponents which were scattered from ocean surface and the correlation time used in the Gaussian correlationfunction was estimated by the comparison. Finally, bit-error-rate and channel correlation simulations wereperformed with the generated time-varying channel based on passive time-reversal communication scenario.

han'gug eumhyang haghoeji/han-guk eumhyang hakoeji

Underwater Acoustic Communication Channel Modeling Regarding Magnitude Fluctuation Based on Ocean Surface Scattering Theory and BELLHOP Ray Model and Its Application to Passive Time-reversal Communication