| Summary: | With the development of communication countermeasure technology, the existing communication mode is exposed to intercept or decipher in the covert transmission of information. Therefore, the development of a new concept and principle covert communication technology with low interception probability and anti-non-cooperative demodulation has drawn increasing attention. In this treatise, we propose a chaotic multi-tone modulation and demodulation technology thus present a method to construct the covert communication system. The technology constructs chaotic multi-tone sets to express the baseband information with the multi-value mapping based on the dynamics principle, which can express the same baseband information with different multi-tone groups. Signal modulation is accomplished by combining frequency hopping and baseband information scrambling technology. Multi-value mapping is adopted to complete chaotic multi-tone modulation. Specifically it has strong information concealment and anti-non-cooperative demodulation characteristics. In order to solve the demodulation problem of the cooperative party, we present a demodulation scheme based on chaotic multi-tone and provide a complete chaotic multi-tone communication system construction scheme. Simulation results verify the performance of the proposed method.
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