摘要
提出了一种Duffing弱信号能量检测方法。通过能量算法对不同状态下Duffing振子的频率分布特性进行分析,得到了一种基于瞬时频率的Duffing振子状态判别方法,并进一步给出了相变判别阈值的设定准则,且对检测算法的抗噪性和实时性进行了分析。仿真实验表明,该方法的计算量和实时性比传统相变判别算法有明显的改善,可满足强噪声背景下微弱信号的快速检测要求。
A novel Duffing detection method based on energy separation algorithm is proposed. The frequency distribution characteristics of the Duffing system in different states are investi- gated and an identification method is obtained with the instantaneous frequency, then the selec- tion rule of identification threshold is given. The noise immunity and real-time property of the method are analyzed. Simulations show that the algorithm complexity and real-time perform- ance of the method are significantly improved and it can meet the needs of the weak signal de- tection under the strong noise background.
出处
《数据采集与处理》
CSCD
北大核心
2013年第3期352-357,共6页
Journal of Data Acquisition and Processing
基金
"泰山学者"建设工程专项经费资助项目
关键词
混沌检测
能量分离算法
判别阈值
实时性
chaotic detection
energy separation algorithm
identification threshold
real-time performance
作者简介
孙文军(1987-),男,博士,研究方向:数字通信信号检测,E-mail:djresearch@126.com
芮国胜(1968-),男,教授,研究方向:信号分析与处理,小波分析与应用
张洋(1979-),男,讲师,研究方向:非线性滤波与弱信号检测技术
王林(1985-),男,博士,研究方向:数字通信信号检测。