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| 子空间降噪在舰船噪声混沌信号处理中的应用 | |
| 引用本文： | 茆明,肖琼,肖毅. 子空间降噪在舰船噪声混沌信号处理中的应用[J]. 应用声学, 2009, 28(1): 37-41 |
| 作者姓名： | 茆明 肖琼 肖毅 |
| 作者单位： | 1. 海军蚌埠士官学校机电系电气教研室,蚌埠,233012 2. 湖南衡阳师院数学系,衡阳,421008 3. 海军大连舰艇学院信息与通信工程系,辽宁,115018 |
| 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。 |
| 关 键 词： | 混沌 子空间投影降噪 Lorenz模型 舰船辐射噪声 |
Application of sub-space projection noise reduction in the processing of ships chaotic signal |
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| MAO Ming,XIAO Qiong and XIAO Yi. Application of sub-space projection noise reduction in the processing of ships chaotic signal[J]. Applied Acoustics(China), 2009, 28(1): 37-41 | |
| Authors: | MAO Ming XIAO Qiong XIAO Yi |
| Affiliation: | 1 The electric stuff room of electric machinery dept,Bengbu Navy Petty Officer Academy,Anhui Bengbu 233012) (2 Dept of Mathematics,Hengyang Teacher’s College,Hunan Hengyang 421008) (3 Dept.Information&Engineering of Dalian Naval Academy,Dalian 116018) |
| Abstract: | 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. |
| Keywords: | Chaos Sub-space projection noise reduction Lorenz model Ship noise |
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