Open AccessSecure communication method for fast-varying information signal based on chaotic modulation
Author(s) -
Jianfen Li,
Li g,
Lin Hui
Publication year - 2004
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.53.1694
Subject(s) - chaotic , computer science , synchronization (alternating current) , signal (programming language) , transmission (telecommunications) , modulation (music) , secure communication , control theory (sociology) , information transmission , synchronization of chaos , encryption , telecommunications , physics , computer network , control (management) , acoustics , channel (broadcasting) , artificial intelligence , programming language
A new secure communication method based on chaotic modulation is proposed. The parameter of the transmitting system procreated chaotic carrier is modulated by errors from an adaptive controller and information signal. At the same time, the information is directly multiplied by the chaotic carrier 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 information signal. Since the synchronization error is independent of information signal,the chaotic modulation for large-amplitude and fast-varying information signals can be achieved. The results of theoretic analysis and numerical simulation show that the proposed method enhances the degree of security of low-dimensional chaotic systems.