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Improve the performance of PrecomputedLowfreqPowerSpectrum
#20
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Is now part of the code but needs to be made more performant. In particular, the FFTs have to be performed in place. |
JanJereczek
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performance
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new indicator
Suggestion for a new transition indicator
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Mar 13, 2024
JanJereczek
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Low-frequency power spectrum
Improve the performance of Mar 13, 2024
PrecomputedLowfreqPowerSpectrum
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Indicator summary
Compute ratio between low-frequency power spectrum and total power spectrum. What is "low-frequency"? Defined by user but standard is something like 10 lowest percent of the total power spectrum. Performs well wherever CSD is expected (conversely bad wherever CSD might be "hidden", e.g. by high signal-to-noise ratio).
Reference
Bury et al. (2020), Detecting and distinguishing tipping points using spectral early warning signals.
Codebase
Rely on FFTW for FFT
Implementation plan
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