臺灣博碩士論文加值系統

渾沌系統對於訊號設計和訊號產生，提供了豐富的機制，在通信系統和信號處理有應用的潛力。由於渾沌信號通常是寬頻的，類似雜訊的，難以預測的，因此在訊號傳送過程中可用於遮罩訊號，在展頻系統中可用於調變波形，在系統中可以有很多實際的應用，例如安全資料通信、遮蔽訊息信號、擴展數據序列或用於產生隨機信號。
渾沌系統因其複雜性、不可預測性及系統的變化對初始條件的選取非常敏感，近年來有相當多將渾沌系統應用於訊息加密的研究。為強化渾沌系統的訊息加密應用，本論文提出輸入信號對渾沌系統的影響、控制渾沌系統初始值的方法、時間延遲渾沌系統的快速設計方式、類比電路實現及實驗結果印證。

Chaotic systems provide a rich mechanism for signal design and generation, with potential applications to communications and signal processing. Because chaotic signals are typically broadband, noise-like, and difficult to predict, they can be used in various contexts for masking information bearing waveforms. They can also be used as modulating waveforms in spread spectrum systems. This can be useful in many practical circumstances like securing communication channels, masking signals, spreading data sequence, or for generating random signals.
For the sake of complexity, unpredictability and exceedingly sensitive to initial conditions in the chaotic systems, there are many studies for information encryption of chaotic systems. Enhancing the security in information encryption of chaotic systems, this thesis proposes the effects of input signals for chaotic systems, initial value control for chaotic systems, a rapid way to design time-delay chaotic systems, analog circuit implementation and experiment results verifying.

摘要 I
Abstract II
致謝 III
List of Figures V
List of Tables XII

Chapter 1 Introduction 1
1.1 Background and Motivation 1
1.2 Organization and Main Tasks 2
Chapter 2 The Effects of Input Signals for Chaotic Systems 3
2.1 Chaotic System 3
2.2 Fractional-Order System 17
Chapter 3 Initial Value Control Circuit for Chaotic Systems 24
3.1 Chaotic System 24
3.2 Fractional-Order System 34
Chapter 4 Circuits and Chips Implementation for Chaotic Systems 37
4.1 Chaotic System 37
4.2 Hyper-Chaotic System 45
4.3 Initial Value Tuning via The Pulse-Width Control Circuit 54
Chapter 5 Conclusions and Future Works 58
5.1 Conclusions 58
5.2 Future Works 59

Appendix: A Rapid Way to Build Time-Delay Chaotic Systems 60
A.1 Chaotic System 60
A.2 Fractional-Order System 61

References 63
Publication List 70

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