| 基于混沌振子的微弱ASK信号解调 |
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| 引用本文： | 高清山,张天骐,蒋世文,黄铫.基于混沌振子的微弱ASK信号解调[J].电子技术应用,2010,36(4). |
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| 作者姓名： | 高清山 张天骐 蒋世文 黄铫 |
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| 作者单位： | 重庆邮电大学信号与信息处理重庆市重点实验室,重庆,400065 |
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| 基金项目： | 国家自然科学基金委和中国工程物理研究院(NSAF联合基金)项目，国家自然科学基金，重庆市教委资助项目，重庆市科学技术委员会资助项目 |
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| 摘 要： | 针对微弱数字调制信号的解调问题,提出了利用混沌振子对周期小信号的敏感性和对噪声的免疫力来解调强噪声中幅移键控(ASK)信号的新方法。详细阐述了基于duffing振子的微弱信号检测方法,结合ASK信号的调制方式,分析了利用duffing振子解调微弱ASK信号的基本思想,并提出利用功率谱熵判别系统状态的新方法。仿真表明,在信噪比为-20dB时,该方法实现了对ASK信号的解调,且抗噪性能优于传统的解调方法。
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| 关 键 词： | Duffing振子 ASK信号 功率谱熵 解调 |
Demodulation of ASK signal based on chaotic oscillator |
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| GAO Qing Shan,ZHANG Tian Qi,JIANG Shi Wen,HUANG Yao.Demodulation of ASK signal based on chaotic oscillator[J].Application of Electronic Technique,2010,36(4). |
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| Authors: | GAO Qing Shan ZHANG Tian Qi JIANG Shi Wen HUANG Yao |
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| Abstract: | Chaotic oscillator has characteristic of sensibility to small periodic signals and immunity against noise.By making use of the characteristic,a new method of demodulating ASK signal submerged in strong noise is presented according to the demodulation problem of weak digital modulation signal.Technique of weak signal detection based on Duffing oscillator is introduced first.By combining with modulation method of ASK signal,the basic idea of demodulating ASK signal using duffing oscillator is analyzed,and a new method is presented for power spectrum entropy used to judge the system state.The simulation show that ASK signal could be demodulated at by the method presented here and the anti noise performance is better than traditional demodulation method. |
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| Keywords: | duffing oscillator ASK signal power spectrum entropy demodulation |
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