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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.


User manpage available in HTML format from http://ab-initio.mit.edu/harminv/harminv-man.html


Download version 1.4 (stable)
released on 31 March 2015



LicenseVerified byVerified onNotes
GPLv2orlaterJanet Casey18 May 2004

Leaders and contributors

Steven G. Johnson Maintainer

Resources and communication

AudienceResource typeURI
Bug Tracking,Developer,SupportE-mailmailto:stevenj@alum.mit.edu

Software prerequisites

Required to useLAPACK
Required to useBLAS

This entry (in part or in whole) was last reviewed on 14 October 2016.


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