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