【摘 要】
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In this paper, we present a secure communication method for a high-power information signal based on chaoticmasking. In the transmitter, an adaptive controller
【机 构】
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The Engineering Institute of the Air Force Engineering University, Xi’an 710038, China
论文部分内容阅读
In this paper, we present a secure communication method for a high-power information signal based on chaoticmasking. In the transmitter, an adaptive controller is adopted to pick up the change of the information signal, andto inject the controller’s error into the transmitting system. At the same time, the information is directly added tothe chaotic signal in transmission to drive the receiving system. In the receiver, another adaptive controller is usedto maintain chaotic synchronization of the transmitting and receiving systems and to recover the information signal.Since the synchronization error is independent from the information signal, the power of the information signal can beequivalent to that of the chaotic signal, and the frequency of the information signal can be set within the range of theprincipal frequencies of the chaotic signal. The results of theoretical analysis and numerical simulation show that thepresented method not only enhances the degree of security of low-dimensional chaotic systems but also significantlyimproves the signal-to-noise ratio at the receiving end.
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