A Simulation Method of Shallow Water Reverberation Based on K-distribution Model and Multipath

The Rayleigh distribution reverberation method based on the central-limit theorem cannot adapt to the high resolution active sonar system, while K-distribution model is more suitable for the statistical characters of the rever-beration in the condition of limited number of scatterers. Therefore, a new method is proposed in this paper to deduce the non-Rayleigh distribution reverberation by setting the random variables of K-distribution and simulating the reverbera-tion from matched filter. FIR filters are used to simulate multipath propagation, further to investigate the statistical characters of the reverberations of multipath propagation and direct wave. Simulation results indicate that the K-distribution based multipath propagation reverberation occupies obvious statistical characters of non-Rayleigh distri-bution in normalized reverberation intensity, probability of false alarm, and autocorrelation function.