Application Research on Frequency-Division Multiplexing to Chaos Secret Communication

Chua´s circuit, which is improved to integrate conveniently, is presented. A drive-response band chaotic synchronization system is constructed, which possesses to a certainly stability resisting-disturbance and so on, at the same time, the major factors of influencing chaotic synchronization and the method of estimating key-wave frequency band are presented; according to FMD technique, the critical problem of how to simultaneously transmit the controlling signal of chaotic synchronization and the secret signal at a channel can be solved, and that, a practical experiment validates the method; as a result, the research in the paper provides the foundation of putting chaos into practice application to secret communication.