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Re: spectral estimation e.g., MEM, MUSIC [message #10777 is a reply to message #10701]

Thu, 15 January 1998 00:00

Jeff Kommers
Messages: 2
Registered: June 1997

Junior Member

There is a text by S. Lawrence Marple Jr. called "Digital Spectral
Analysis with Applications". It comes with some Fortran codes that
implement the various spectral analysis techniques, including Burg's
algorithm and MUSIC.

I have written a set of IDL and C wrappers for these Fortran codes so
that I can call them from IDL using call_external(). If you are
interested, post or send me e-mail.

I must warn that using the Fortran codes on different platforms
produced very different results using the test data supplied by
Marple. It appears to be a dependence on floating point
implementation: I got different results using a VAX, Sun (single
precision), and Sun (double precision). The spectra are qualitatively
similar, but the actual numbers differ by as much as 10 percent using
the modified covariance estimator (MODCOVAR). (!)

Jeff

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[Message index]

		spectral estimation e.g., MEM, MUSIC By: Jack Harlan on Wed, 14 January 1998 00:00
		Re: spectral estimation e.g., MEM, MUSIC By: Jeff Kommers on Thu, 15 January 1998 00:00

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