基于固定尺度正交小波包变换的脉冲响应辨识方法研究

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An Algorithm for Impulse Response Identification Based on Fixed Scale Orthogonal Wavelet Packet Transform

1.
The Department of Electronic Engineering,Tsinghua University,Beiing;The 7th Research Division,Beijing University of Aeronautics and Astronautics,Beijing;The Institute of Electronic Engineering,Chinese Academy of Engineering Physics,Mianyang

摘要: 小波包变换能作为一种有效工具对信号特性进行精细分析,同时提供具有良好时频局部性的正交小波包基.本文将Eykhoff脉冲响应辨识方法中的正交函数基取成正交小波基函数, 提出了一种新的脉冲响应辨识方法,该方法不但保证了原来Eykhoff方法的有效性,而且实用性更好、实用范围更广.仿真结果表明,所提出的脉冲响应辨识算法对于确定性过程和随机过程都具有很好的辨识结果,具有辨识精度高、克服噪声干扰能力和跟踪系统动态特性变化能力强的优点.
- 小波包变换 /
- 时频分析 /
- Eykhoff方法 /
- 脉冲响应辨识
Abstract: Wavelet packet transform is used as an efficient tool for precisely analyzing signal property, and provides orthogonal wavelet packet bases with better time-frequency localization function. In this paper, by applying orthogonal wavelet packet bases to Eykhoff algorithm a new impulse response identification algorithm is proposed, which has better practicability , and wider application range. Simulation results show that the proposed algorithm can be applied to deterministic system and random system, and is of higher identification precision, stronger anti-noise-interference ability and better tracking system dynamic property.
- Wavelet packet transform /
- time-frequency analysis /
- Eykhoff algorithm /
- impulse response identification