| 引用本文: | 赵文礼,范剑,吴敏,王万强.微弱信号混沌检测的自跟踪扫频控制方法[J].控制理论与应用,2014,31(2):250~255.[点击复制] |
| ZHAO Wen-li,FAN Jian,WU Min,WANG Wan-qiang.Self-tracing-frequency control in weak signal chaotic detection[J].Control Theory and Technology,2014,31(2):250~255.[点击复制] |
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| 微弱信号混沌检测的自跟踪扫频控制方法 |
| Self-tracing-frequency control in weak signal chaotic detection |
| 摘要点击 2445 全文点击 2368 投稿时间：2013-02-02 修订日期：2013-08-15 |
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| DOI编号 10.7641/CTA.2014.30105 |
| 2014,31(2):250-255 |
| 中文关键词 混沌理论 信号检测 自跟踪扫频控制 微弱信号 Duffing振子 |
| 英文关键词 chaos theory signal detection self-tracing-frequency weak signal Duffing oscillator |
| 基金项目 国家自然科学基金资助项目(50875070); 浙江省教育厅科研资助项目(y201326915); 台州市科技计划资助项目(1202ky02)． |
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| 中文摘要 |
| 当利用混沌理论进行微弱信号的检测时, 针对不同频率的信号只能分别构建不同的检测系统进行检测, 势
必使其检测效率低下. 本文阐述了一种分频段阈值变换的混沌检测方法, 并基于该方法实现了自跟踪扫频检测. 为
此, 首先分析了微弱信号混沌检测方法中的变阈值法和定阈值法, 指出了这两种方法的优缺点, 然后提出了分频段
阈值变换的混沌检测方法, 并基于该方法开展了微弱信号的自跟踪扫频检测控制的研究, 设计制作了微弱信号自跟
踪扫频检测控制电路, 并进行了微弱信号自跟踪扫频混沌检测的实验研究. 结果表明该检测控制系统可以实现在噪
声背景下的中低频率微弱周期信号的自跟踪扫频检测. |
| 英文摘要 |
| Chaotic detection can be applied to extract the weak sinusoidal signal submerged in noise background.
However, there are few effective ways to construct the chaotic detection system for detecting a continuous frequency band
signal. We elaborate two chaotic detection methods, the fixed-threshold-value method and the floating-threshold-value
method, and analyze their advantages and shortcomings. On this basis, we propose the multi-frequency-band thresholdvalue
transform method to deal with the problems existing in the above two mentioned methods, and design the selffrequency-
tracing circuitry accordingly. The operation of this circuitry is validated by hardware experiments. Experimental
results show that weak medium-low frequency signals can be detected from the background noise by using this method. |
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