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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2006, Vol. 7 Issue (Supplement 2): 228-236    DOI: 10.1631/jzus.2006.AS0228
Original Paper     
Adaptive synchronization of chaotic Colpitts circuits against parameter mismatches and channel distortions
Shen Cheng, Shi Zhi-Guo, Ran Li-Xin
Department of Information and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
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Abstract  In this work, synchronization of chaotic Colpitts circuits, using adaptive controllers to combat circuit parameter mismatches and channel distortions, is studied by numerical simulations. Synchronization errors caused by different main circuit components are compared, and compensation for time-constant and time-varying circuit parameter mismatches is demonstrated. Different kinds of channel distortions, including time-constant and time-varying channel attenuation, Additive White Gaussian Noise (AWGN) are all investigated by numerical simulations and discussed. Simulation results indicated that the synchronization performance of chaotic Colpitts circuits can be greatly improved by applying adaptive controllers when parameter mismatches and channel attenuation are considered as time-constant or time-varying, but have no obvious enhancements regarding the effect on AWGN channel.

Key words： Chaos      Synchronization      Adaptive control      Colpitts circuit     
Received: 10 October 2005     
CLC:  TM132  
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Shen Cheng, Shi Zhi-Guo, Ran Li-Xin. Adaptive synchronization of chaotic Colpitts circuits against parameter mismatches and channel distortions. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(Supplement 2): 228-236.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2006.AS0228     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2006/V7/ISupplement 2/228

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