Abstract
A novel method of bionic Morse coding mimicking humpback whale vocal is presented for covert underwater acoustic communication. The complex humpback whale song is translated as bionic Morse codes based on information entropy. The communication signal is made akin to the natural singing of male humpback whales. The intruder can detect the signal but will not be able to recognize the communication signal due to unified resemblance with the natural sound. This novel technique gives an excellent low probability of recognition characteristics. A flawless stealthy underwater acoustic communication has been established which has negligible chances of deciphered with high imperceptibility. Standard mimicry Morse codes have been developed for the characters of the English language and compared with Morse coding. Covert information of one character per second can be watermarked with perfect stealth and clandestine communication. This novel concept has been verified at transmission distance of five km and less than 10−3 Bit Error Rate (BER) is achieved at Signal to Noise Ratio (SNR) down to negative seven dB. Zero BER is attained by estimating the channel by a matching pursuit algorithm and equalizing the errors by virtual time reversal mirror technique.
Highlights
The security and privacy of information is one of the most critical issue of today’s fast moving world
We can write as sectime of signal, Ts is the time of the is the total where C is the average speed of character, Tt − Ts t synchronization frame and n represents the total number of characters in the communication where is the average of character, Tt is the total time of signal, Ts is the the synchronization signal.CBy using thisspeed humpback whale song segments, we found thattime weofcan watermark one frame and nwith represents the covert total number of characters the communication character/s a perfectly perspective using thein proposed technique. signal
An innovative bionic Morse coding technique mimicking a humpback whale song is presented in this research
Summary
The security and privacy of information is one of the most critical issue of today’s fast moving world. Simulation results showed a BER of almost zero [24] Another novel method of covert mimicry communication was presented and tested using sea piling sounds using pulse position modulation [25]. The whale song segments are mimicked into bionic Morse codes using information entropy for the characters of the English language It gives perfect LPR constraint covert communication as the imitated communication signals have no chance of being recognized as a communication signal as it is composed of a natural humpback whale song. The novel concept has been verified at distances of five km and less than 10−3 BER is achieved This proves that the proposed method is feasible for LPR constraint covert underwater acoustic communication for long distances.
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