Modeling and Simulation of Layered Seafloor Reverberation Space-Time for Arbitrary Array

Considering the layered medium in the seafloor environment, a reverberation space-time model adapted to the arbitrary array was established for the layered seafloor. The impacts of the Doppler shift, the direction of scattering body, the inhomogeneity of sediment and basement, and the sediment-water interface on the reverberation were considered in the model. All the received scattering signals were superposed at the array element to form the single channel output of the reverberation. The proposed space-time model of the reverberation was adapted to the complex seafloor environment. The reverberation of continuous wave(CW) signal was simulated using this model. By comparing the characteristics of the simulated reverberations in time domain and 2D space-time domain with the theoretical expectation, the validity and accuracy of the proposed reverberation space-time model are proved.