摘要
结合混沌信号本身的特性采用子空间投影理论,研究含噪Lorenz模型信号和水下舰船噪声信号的降噪问题。讨论了延迟时间和嵌入维对降噪效果的影响,重点研究了为保持混沌信号的局部特性如何选择参与自相关函数计算的信号长度。采用分段自相关函数多次迭代的方法,保持了混沌的局部特性。仿真结果表明,降噪效果较为理想。
It givens some studies on how to reduce the noise in the Lorenz mode as well as in the ship noise, which based on the sub-space projection theory and the characters of chaos. In order to keep signal subtle, some discussions are presented about how to choose the parameters such as delay time and embed dimensions, and the length of the data, which involves in the auto correlations function. The simulation result validates it well.
出处
《应用声学》
CSCD
北大核心
2009年第1期37-41,共5页
Journal of Applied Acoustics
