Main Content

本页翻译不是最新的。点击此处可查看最新英文版本。

时频分析

频谱图、同步压缩、重排、Wigner-Ville、时频边缘、数据自适应方法

Signal Processing Toolbox™ 提供的函数和 App 可用于可视化和比较非平稳信号的时频内容。计算短时傅里叶变换及其逆变换。使用重排或傅里叶同步压缩获得清晰的频谱估计。绘制交叉频谱图、Wigner-Ville 分布和持久频谱。提取并跟踪时频脊。估计瞬时频率、瞬时带宽、谱峭度和谱熵。使用经验或变分模态分解和希尔伯特-黄变换执行数据自适应时频分析。使用 Wavelet Toolbox™ 提供的函数和 App 探索其他时频表示和分析方法。

App

信号分析器可视化和比较多个信号和频谱
信号标注器Label signal attributes, regions, and points of interest, and extract features
信号多分辨率分析器Decompose signals into time-aligned components
小波时频分析器Visualize scalogram of signals (自 R2022a 起)

函数

全部展开

fsstFourier synchrosqueezed transform
ifsstInverse Fourier synchrosqueezed transform
instbwEstimate instantaneous bandwidth (自 R2021a 起)
instfreqEstimate instantaneous frequency
kurtogramVisualize spectral kurtosis
pkurtosisSpectral kurtosis from signal or spectrogram
pentropySpectral entropy of signal
pspectrumAnalyze signals in the frequency and time-frequency domains
spectrogramSpectrogram using short-time Fourier transform
xspectrogramCross-spectrogram using short-time Fourier transforms
stftShort-time Fourier transform
dlstftDeep learning short-time Fourier transform (自 R2021a 起)
stftLayerShort-time Fourier transform layer (自 R2021b 起)
stftmag2sigSignal reconstruction from STFT magnitude (自 R2020b 起)
iscolaDetermine whether window-overlap combination is COLA compliant
istftInverse short-time Fourier transform
tfridgeTime-frequency ridges
wvdWigner-Ville distribution and smoothed pseudo Wigner-Ville distribution
xwvdCross Wigner-Ville distribution and cross smoothed pseudo Wigner-Ville distribution
emdEmpirical mode decomposition
ewtEmpirical wavelet transform (自 R2020b 起)
vmdVariational mode decomposition (自 R2020a 起)
hhtHilbert-Huang transform
cqtConstant-Q nonstationary Gabor transform
cwtContinuous 1-D wavelet transform
modwptMaximal overlap discrete wavelet packet transform
modwtMaximal overlap discrete wavelet transform
tqwtTunable Q-factor wavelet transform (自 R2021b 起)
waveletScatteringWavelet time scattering
wcoherenceWavelet coherence and cross-spectrum
wsstWavelet synchrosqueezed transform

主题

相关信息