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频谱测量

通道功率、带宽、均值频率、中位数频率、谐波失真

使用 obw 和 powerbw 查找信号的 90% 占用带宽和 3-dB 带宽。计算功率谱的均值或中位数频率。估计给定频带上的功率。测量谐波失真。估计瞬时带宽、瞬时频率、频谱熵和谱峭度。

函数

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bandpowerBand power
enbwEquivalent noise bandwidth
instbwEstimate instantaneous bandwidth (自 R2021a 起)
instfreqEstimate instantaneous frequency
meanfreqMean frequency
medfreqMedian frequency
obwOccupied bandwidth
pentropySpectral entropy of signal
pkurtosisSpectral kurtosis from signal or spectrogram
powerbwPower bandwidth
spectralCrestSpectral crest for signals and spectrograms
spectralEntropySpectral entropy for signals and spectrograms
spectralFlatnessSpectral flatness for signals and spectrograms
spectralKurtosisSpectral kurtosis for signals and spectrograms
spectralSkewnessSpectral skewness for signals and spectrograms
signalFrequencyFeatureExtractorStreamline signal frequency feature extraction (自 R2021b 起)
sfdrSpurious free dynamic range
signalTimeFeatureExtractorStreamline signal time feature extraction (自 R2021a 起)
sinadSignal to noise and distortion ratio
snrSignal-to-noise ratio
thdTotal harmonic distortion
toiThird-order intercept point

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