Detection of Dolphin Whistle-Like Biomimicking Signals by Phase Analysis

The application of low probability detection (LPD) in underwater acoustic communication is challenging due to the limited bandwidth and frequency band available that allows simple interception using energy detection. Confronting that, recent LPD schemes offer disguise signal as a vocalization marine mammal. This way, signals can be transmitted at high power, while interceptor believes these are biological sounds. In this paper, we propose first tailored distinguish between anthropogenic Our main assumption limitations on dump-off factor projector, phase real whistle would much more diverse than disguised whistle-like signal. We therefore classification measure randomness signal’s phase. calculated by phase-locked-loop, phase’s measured entropy. results show approximate sample entropies, which both uncover regularities signal, good metrics. Analysis data obtained from two sea experiments large database tagged dolphins’ whistles, shows our scheme well biomimicked signals.