| A Secure communication method for a high-power information signal based on chaotic masking |
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| 作者姓名： | 李建芬 李农 |
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| 作者单位： | The Engineering Institute of the Air Force Engineering University, Xi'an 710038, China;The Engineering Institute of the Air Force Engineering University, Xi'an 710038, China |
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| 摘 要： | In this paper,we present a secure communication method for a high-power information signal based on chaotic masking.In the transmitter,an adaptive controller is adopted to pick up the change of the information signal ,and to inject the controller‘s error into the transmitting system.At the same time,the information is directly added to the chaotic signal in transmission to drive the receiving system.In the receiver,another adaptive controller is used to 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 be equivalent to that of the chaotic signal,and the frequency of the information signal can be set within the range of the principal frequencies of the chaotic signal,The results of theoretical analysis and numerical simulation show that the presented method not only enhances the degree of security of low-dimensional chaotic systems but also significantly improves the signal-to-noise ratio at the receiving end.
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| 关 键 词： | 安全通信 大功率信号 浑沌屏蔽 |
| 收稿时间： | 2002-03-14 |
A secure communication method for a high-power information signal based on chaotic masking |
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| Li Jian-Fen and Li Nong.A Secure communication method for a high-power information signal based on chaotic masking[J].Chinese Physics B,2002,11(11):1124-1127. |
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| Authors: | Li Jian-Fen and Li Nong |
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| Institution: | The Engineering Institute of the Air Force Engineering University, Xi'an 710038, China |
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| Abstract: | In this paper, we present a secure communication method for a high-power information signal based on chaotic masking. In the transmitter, an adaptive controller is adopted to pick up the change of the information signal, and to inject the controller's error into the transmitting system. At the same time, the information is directly added to the chaotic signal in transmission to drive the receiving system. In the receiver, another adaptive controller is used to 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 be equivalent to that of the chaotic signal, and the frequency of the information signal can be set within the range of the principal frequencies of the chaotic signal. The results of theoretical analysis and numerical simulation show that the presented method not only enhances the degree of security of low-dimensional chaotic systems but also significantly improves the signal-to-noise ratio at the receiving end. |
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| Keywords: | chaotic masking secure communications adaptive controllers Chua's circuits |
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