A method for underwater acoustic covert communication based on combination of chaotic spread spectrum and bionic camouflage
By combining chaotic spread spectrum and biomimetic camouflage techniques in underwater acoustic communication, using Logistic mapping to generate chaotic sequences for hopping code encoding and frequency hopping spread spectrum modulation, and employing adaptive threshold detection, the problems of easily decipherable signals and limited detection performance in low signal-to-noise ratio environments in underwater acoustic communication are solved, thus achieving efficient covert communication.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SOUTH CHINA UNIV OF TECH
- Filing Date
- 2026-04-29
- Publication Date
- 2026-07-17
AI Technical Summary
Existing underwater acoustic communication methods have relatively fixed time-frequency characteristics, making them easy to decipher. Furthermore, their detection performance is limited in low signal-to-noise ratio environments, making it difficult to achieve effective covert communication.
A method combining chaotic spread spectrum and biomimetic camouflage is adopted. The chaotic sequence is generated by Logistic mapping for hopping code coding and frequency hopping spread spectrum modulation. Adaptive threshold detection based on maximum correlation value and average correlation value is used at the receiver to achieve covert signal transmission.
It improves the concealment and anti-interference ability of underwater acoustic communication, enhances the detection performance in complex underwater acoustic channels, and reduces the algorithm complexity.
Smart Images
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