Multipath Modeling under Tank Environment for Underwater Acoustic Communication

For wireless acoustic communication, the tank is the most difficult channel to model due to the presence of multipath effects. These multipath interference effects are unique for a pair of a projector and hydrophone placed at a specific depth in the tank. It has been suggested that existing multipath models proposed for the sea are referred for modelling multipath effects in the tank however a fresh investigation is desired because of different channel environment and boundary conditions. In this direction, we have proposed a multipath model: SWARA that estimates path gain, delay using the chirp signaling method. The received signal is modeled using proposed multipath parameters. Further the received signal is verified and validated with help of the experimental data. The accuracy of the proposed multipath channel model is measured by root mean square error (RMSE) applied between modelled data and measured data of received signal. We believe that the proposed approach will be used extensively to characterize chirp signal transmission in tank for long-range.