...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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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。
Aim To extract harmonic frequencies of helicopter acoustic signal as features for helicopter identification.
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。
Finally, by using ESPRIT harmonic frequencies are extracted from real measured helicopter acoustic signal. All results demonstrate that ESPRIT is superior t…
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。
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.
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