...直升机声信号；特征提取 [gap=922]Key words: higher order statistics；parametric model；bispectral estimation；helicopter acoustic signal；feature extraction ...
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Aim To extract harmonic frequencies of helicopter acoustic signal as features for helicopter identification.
目的提取直升机声信号谐波频率作为特征用以识别直升机。
Finally, by using ESPRIT harmonic frequencies are extracted from real measured helicopter acoustic signal. All results demonstrate that ESPRIT is superior t…
各种结果均显示谐波恢复的ESPRIT方法在提取谐波频率方面较之其它方法更为优越，用它提取直升机声信号特征是十分有效的。
Based on analysis of spectral characteristic of helicopter acoustic signal, a method of extracting harmonic frequencies from the helicopter acoustic signal via ESPRIT is proposed.
在对直升机声信号特征进行分析之后，提出了一种基于谐波恢复的ESPRIT方法来提取直升机声信号谐波频率作为特征用以识别直升机声目标。
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