Biologically inspired covert underwater acoustic communication-A review

With the increasing demand of military and marine applications, the requirement for covert underwater acoustic communication is drastically increasing recently. Innovative and inimitable ways are being explored pushing back the traditional methods, augmenting covert characteristics. Our research focuses on biologically inspired covert underwater acoustic communication mimicking marine mammal sounds. The communication signal could be detected by the eavesdropper but it is excluded from the process of recognition due to similarity with cetacean vocals achieving excellent Low Probability of Interception characteristics. The purpose of this study is to provide a comprehensive survey on bionic covert underwater acoustic communication using cetacean vocals since its inception. The works are summarized, compared and future research trends are highlighted.