Extraction and application of the low dimensional dynamical component from underwater acoustic target radiating noise

• 来源期刊: 声学学报（英文版）
• 学科: 物理学
• 年，卷（期）: 2001,（4）
• 页码范围: 319-326
• 页数: 8页
• 分类号: O4
• 语种: 英文

摘要

Signal processing in phase space based on nonlinear dynamics theory is a new method for underwater acoustic signal processing. One key problem when analyzing actual acoustic signal in phase space is how to reduce the noise and lower the embedding dimension. In this paper, local-geometric-projection method is applied to obtain low dimensional element from various target radiating noise and the derived phase portraits show obviously low dimensional attractors. Furthermore, attractor dimension and cross prediction error are used for classification. It concludes that combining these features representing the geometric and dynamical properties respectively shows effects in target classification.