锁相鉴频器混沌现象的研究
Study of chaotic phenomena of phase-locked frequency detector
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摘要: 该文研究无线电技术与现代通信领域广泛使用的锁相鉴频器中的混沌现象,利用Melnikov方法,证明了当输入信号参数、系统参数满足一定条件时,锁相鉴频器有混沌信号输出。通过电路实验,从频谱分析仪上观察到电路出现混沌时,压控振荡器输出端的连续频谱,进一步证实了锁相鉴频器电路中存在混沌现象。实验结果与理论分析相吻合,文中的结论对实际设计和应用锁相鉴频器,具有重要的指导意义。Abstract: This paper studies chaotic phenomena of phase-locked frequency detector that is used extensively in radio technology and modern communication fields. By Melnikovs method, phase-locked frequency detector will output chaotic signal when the systems parameter and the parameters of input signal satisfy certain conditions. By circuit experiment, when the circuit outputs chaotic signal, the continuous spectrum of the voltage-controlled oscillators output is observed from frequency spectrograph. The fact of phase-locked frequency detector exists chaotic phenomena is father verified. The experimental results and theory analysis correspond excellently with one another. The conclusion in this paper has importance directive significance for practical design and application of the phase-locked frequency detector.
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