Whale-sound-imitating covert underwater sound communication method based on self-adaptive interference cancellation
A technology for interference cancellation and underwater acoustic communication. It is applied in ultrasonic/sonic/infrasonic transmission systems, transmission noise suppression, electrical components, etc., and can solve problems such as lack of safety and concealment.
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[0051] The present invention will be further described below in conjunction with the accompanying drawings.
[0052] The invention discloses a concealed underwater acoustic communication method based on self-adaptive interference cancellation and imitating whale calls. From the perspective of bionic camouflage, the invention utilizes the auditory masking effect of human ears to realize covert communication. At the transmitting end, the source information is modulated into a direct sequence spread spectrum signal, and mixed with the real whale call signal to form a bionic communication signal, which is sent to the underwater acoustic channel. Among them, the call signal of the whale is not only used as the synchronization signal in the communication signal, but also as the masking signal of the spread spectrum signal. At the receiving end, the whale call signal and the spread spectrum signal are separated in the time domain by using the adaptive interference cancellation metho...
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