Combined Coding Technique for Bionic Covert Underwater Acoustic Communication Based on the Cetacean Click Group

Underwater bionic covert communication technology is a novel means of hiding underwater information. In order to realize hydroacoustic bionic stealth communication, this paper proposes an underwater bionic stealth communication scheme based on humpback whale tick signal grouping combination coding. The scheme constructs a bionic stealth communication sequence based on the time-frequency characteristics, autocorrelation characteristics and distribution characteristics of the individual tick signals in the humpback whale tick sequences. The effectiveness and reliability of the proposed covert communication method is verified through simulation tests.