Chaotic Based Self-Synchronization for RF Steganography Radar/Communication Waveform
Michael A. Gonnella · Journal of Bioresource Management · 2018
Chaotic Based Self-Synchronization for RF Steganography Radar/Communication Waveform.In this project, we continue previous CSR project entitled RF Steganography based Joint Radar/Communication Waveform Design to develop a bio-inspired secure low probability detection (LPD) radio frequency (RF) waveform that can serve multiple purposes simultaneously.Previously, we have developed an RF steganography based RF waveform to conceal a secure digital communication within a linear frequency modulated (LFM) chirp radar signal.By exploiting novel reduced phase shift keying modulation and variable symbol duration, the new waveform is resistant to time domain analysis, frequency domain analysis and cyclostationary analysis.However, to demodulate the hidden communication message, the intended receiver has to know the entire sequence of variable symbol duration, or the entire sequence of pseudo-random phases.We are developing a chaotic based self-synchronization scheme to solve this problem and provide enhanced security.Specifically, a chaotic sequence generator is employed to generate an aperiodic chaotic sequence to control the phase of the reduced phase shift keying modulation.The intended receiver only needs to have knowledge of the initial condition of the chaotic sequence generator to generate the entire pseudo-random phase sequence to achieve self-synchronization.iii