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Author: search.filters.author.Hwang, TMSubject: search.filters.subject.asymptotic synchronization

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    Optical chaotic AM demodulation by asymptotic synchronization
    (2000-02-01)
    Juang, C
    ;
    Hwang, TM
    ;
    Juang, J
    ;
    Lin, WW
    ;
    應用數學系
    Synchronization between two identical chaotic systems (drive and response) with different initial conditions can be achieved provided that the conditional Lyapunov exponents are all negative. Adding an AM signal to the drive system, the two systems become asymptotically synchronized. The AM signal can be recovered by utilizing the property of the asymptotic synchronization. Chaotic AM noise is present as a direct result of the chaotic AM demodulation. Signal-to-chaotic-AM-noise ratio is calculated as a function of the signal amplitude.
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    Item type:Item,
    Subcarrier multiplexing by chaotic multitone modulation
    (2003-10-01)
    Juang, C
    ;
    Huang, ST
    ;
    Liu, CY
    ;
    Wang, WC
    ;
    Hwang, TM
    Subcarrier multiplexing by chaotic multitone modulation is investigated. Optical chaotic light can be achieved by injecting multiple subcarriers into a self-pulsating laser diode. Synchronization between two identical chaotic systems (drive and response) can be implemented provided that the conditional Lyapunov exponents are all negative. By adding amplitude modulation (AM) signals to each subcarrier, the two systems become asymptotically synchronized. The AM signals in each subcarrier can be recovered by the introduction of a filtering process where the Lyapunov exponent of the synchronized error function matches the cutoff frequency of a first order low pass filter.