A 3D Non-Stationary GBSM for Mobile-to-Mobile Underwater Acoustic Communication Channels

This paper proposes a three dimensional (3D) nonstationary geometry-based stochastic model (GBSM) for mobile-to-mobile (M2M) underwater acoustic (UWA) communication channels. In this proposed model, the border reverberations are modeled as a series of specular reflection paths and the volume reverberations are approximated as the twin-cluster birth-death model. Moreover, this model supports dual mobility both of transmitter (Tx) and receiver (Rx) in the 3D body of water. Based on the analytical model, the corresponding channel statistical properties such as the time-frequency correlation function (TF-CF), power delay profile (PDP), average delay, and root mean square delay spread (RMS- DS) are derived. The results show a good fit between the analytical model and the simulation model. Finally, the reliability of the model is validated by comparing the statistical characteristics with the measurement results.