Wavelet smoothing of periodograms is shown to give higher frequency resolution and moderate improvements in matched-filter SNR and Bayesian evidence over Welch PSD for GW150914, while median wavelet packet PSD (especially WDM) is claimed more robust for non-stationary noise.
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Wavelets for power spectral density estimation of gravitational wave data
Wavelet smoothing of periodograms is shown to give higher frequency resolution and moderate improvements in matched-filter SNR and Bayesian evidence over Welch PSD for GW150914, while median wavelet packet PSD (especially WDM) is claimed more robust for non-stationary noise.