Abstract
A novel demodulation strategy for secure communications using chaotic signals is proposed. The approach fits within the general definition of inverse system masking (ISM) methods. In the transmitter, an information signal is encoded using modulation of a parameter in the chaotic system. In the receiver, a synchronous chaotic system is augmented with a proportional–integral (PI) feedback demodulator. The integral feedback action induces certain robustness capabilities into the demodulation loop. Simulations are presented for a class of Lur'e systems.
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