Application of Bionics in Underwater Acoustic Covert Communication

In order to overcome the problems brought by traditional covert communication methods, based on bionics, this paper adopts real or simulated dolphin calls as communication signals to achieve the effect of covert communication and completely solving the safety problem of underwater covert communication. The main work of this paper is as follows: Step 1: Analyze the sound characteristics of cetaceans and classify them according to their sound characteristics. Create and store the database of these calls. Step 2: Analyze the actual application scenario, refer to our research and application, and select bionic signals from the database. Step 3: After the sound source is generated, select the appropriate modulation scheme. Step 4: Refer to the modulation scheme and channel characteristics, adopt appropriate channel estimation and equalization. Finally, the signal is extracted by any suitable receiver.