1) subfrequency
副谐频，次谐波频率
2) subharmonic frequency
次谐波频率
3) harmonic frequencies
谐波频率
1.
Aim To extract harmonic frequencies of helicopter acoustic signal as features for hel icopter 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。
2.
Methods Based on the analysis of spectral characteristics of a helicopter acoustic signal, a method of subspace decomposition was proposed for the purpose of suppressing noise interference and increasing the ability of recognizing target and multiple signal classification(MUSIC), an algorithm of harmonic retrieval, was introduced to extract harmonic frequencies from acoustic signals.
方法 通过对直升机声信号频域特性分析 ,采用基于子空间分解的多重信号分类法 ( MUSIC)算法提取信号谐波频率作为目标特征 ,利用子空间分解将观测数据分解为信号子空间与噪声子空间的特点 ,抑制噪声干扰 ,提高识别能力 。
4) Harmonic frequency
谐波频率
1.
Sign correlation function based modified music algorithm for harmonic frequency estimation in power system;
用于电力系统谐波频率高分辨估计的MUSIC算法
5) Fourier spectrum harmonic spectrum
谐波频谐
6) harmonic frequency-difference
谐波频率差
补充资料：频率计量(见时间频率计量)
频率计量(见时间频率计量)
frequency metrology: see time and frequency metrology
口n IQ liliang顷率频率计皿(f比quency metrolo盯) 计t。见时闰
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条