非線性轉(zhuǎn)移函數(shù)對(duì)濾波器結(jié)構(gòu)混沌信號(hào)周期特性的改善
NONLINEAR TRANSFER FUNCTION IMPROVING THE PERIOD PROPERTY OF (QUASI-)CHAOTIC DIGITAL FILTERS
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摘要: 通過(guò)零輸入和有輸入狀況下具有混沌特性的非線性數(shù)字濾波器輸出信號(hào)周期的對(duì)比,本文提出添加非線性轉(zhuǎn)移函數(shù)來(lái)改善非線性濾波器輸出序列的性能。數(shù)值結(jié)果表明,輸出序列的周期有顯著改善,相關(guān)特性優(yōu)良。此結(jié)構(gòu)便于數(shù)字電路實(shí)現(xiàn),有利于產(chǎn)生的混沌序列在數(shù)字通信中應(yīng)用。
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關(guān)鍵詞:
- 混沌; 數(shù)字濾波器; 非線性轉(zhuǎn)移函數(shù)
Abstract: In this paper, a method to improve the period property of (quasi-)chaotic digital filters by inserting a nonlinear transfer function is presented. Simulation results show that the resulted chaotic sequences have siginificantly increased periods while still preserving good correlation. Moreover, the structure is well suited to be realized in digital hardware and is thus attractive for applications to digital communications. -
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