微波食品加热
光电子学
混乱的
脉搏(音乐)
电子工程
材料科学
物理
光学
计算机科学
电信
工程类
探测器
人工智能
作者
Bo Li,Ruihuan Wu,Yang Gao,Weiyi Hong,H. Li
标识
DOI:10.1109/jlt.2024.3397845
摘要
A novel approach for chaotic microwave pulse (CMP) direct generation based on optoelectronic oscillator (OEO) is proposed and demonstrated. In the present method, an external square wave pulse sequence is injected into the OEO cavity to periodically modulate the feedback gain which results in the CMP direct generation. Compared with the externally modulated CMP generation technique, the present scheme has a simpler and more compact structure. Numerical simulations and experimental results show that the OEO will output CMP if the loop feedback gain is high enough, while the duration and period of the CMP can be flexibly regulated by the external square wave pulse sequence. Due to the presence of bandpass filters in the OEO loop, the generated CMP has a chaotic envelope and contains highfrequency carrier information inside. Furthermore, the precise dynamics of the pulse build-up and cut-off processes are observed by time-frequency analysis, which has consistent results in numerical simulations and experiments. Correlation analysis and phase space reconstruction also eventually confirm the chaotic characteristics of the experimentally obtained envelope of the CMP. The proposed scenario can find applications in highspeed pulsed chaotic radar and chaotic wireless communication systems.
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