Harminv
Harminv
http://ab-initio.mit.edu/harminv/
Extracts frequencies and decay rates from a time series
Harminv is a program (and accompanying library) to solve the problem of harmonic inversion. Given a discrete-time, finite-length signal that consists of a sum of finitely-many sinusoids (possibly exponentially decaying) in a given bandwidth, it determines the frequencies, decay constants, amplitudes, and phases of those sinusoids. Harminv can, in principle, provide much better accuracy than straightforwardly extracting FFT peaks because it assumes a specific form for the signal. (Fourier transforms, in contrast, attempt to represent *any* data as a sum of sinusoidal components.) It is also often more robust than directly least-squares fitting the data (which can have problematic convergence). Harminv employs the "filter diagonalization method" (FDM) of Mandelshtam and Taylor.
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Leaders and contributors
| Contact(s) | Role |
|---|---|
| Steven G. Johnson | Maintainer |
Resources and communication
| Audience | Resource type | URI |
|---|---|---|
| Bug Tracking,Developer,Support | mailto:stevenj@alum.mit.edu | |
| Debian (Ref) | https://tracker.debian.org/pkg/harminv |
Software prerequisites
| Kind | Description |
|---|---|
| Required to use | BLAS |
| Required to use | LAPACK |
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