Difference between revisions of "HRFK"
(New page: == High resolution frequency wavenumber Toolbox (Capon's method) == === Overview === The high resolution frequency wavenumber (hrfk) algorithm follows the ideas of Capon (1969) <ref nam...) |
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| − | == High resolution frequency wavenumber Toolbox (Capon's method) | + | == High resolution frequency wavenumber Toolbox (Capon's method) - overview == |
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The high resolution frequency wavenumber (hrfk) algorithm follows the ideas of Capon (1969) | The high resolution frequency wavenumber (hrfk) algorithm follows the ideas of Capon (1969) | ||
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as the conventional f-k toolbox. | as the conventional f-k toolbox. | ||
| − | + | == Parameter settings == | |
There is just one more (optional!) parameter that can be set. The calcuation for the hrfk algorithm involves the inversion of | There is just one more (optional!) parameter that can be set. The calcuation for the hrfk algorithm involves the inversion of | ||
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much better results compared to the conventional beamforming approach. | much better results compared to the conventional beamforming approach. | ||
| − | + | == Contents of output file == | |
The output files for the high resolution f-k approach are equivalent and compatible to the output | The output files for the high resolution f-k approach are equivalent and compatible to the output | ||
files produced with the conventional approach. For details check [[FK: output files|the following page]]. | files produced with the conventional approach. For details check [[FK: output files|the following page]]. | ||
| − | + | == Graphical display of high resolution f-k results using max2curve == | |
The usage of [[max2curve]] is equivalent to using this tool with .max files produced | The usage of [[max2curve]] is equivalent to using this tool with .max files produced | ||
with the conventional f-k approach. Check [[FK: max2curve|the following page]] for details. | with the conventional f-k approach. Check [[FK: max2curve|the following page]] for details. | ||
| − | + | == References == | |
<references/> | <references/> | ||
Revision as of 17:49, 9 March 2010
Contents
High resolution frequency wavenumber Toolbox (Capon's method) - overview
The high resolution frequency wavenumber (hrfk) algorithm follows the ideas of Capon (1969) [1]
. The corresponding toolbox that can be called using the following
plugin icon 
can be used straightforward in nearly the same way
as the conventional f-k toolbox.
Parameter settings
There is just one more (optional!) parameter that can be set. The calcuation for the hrfk algorithm involves the inversion of the cross spectral matrix estimate from the data. In order to guarantee a numerically stable solution for the Matrix inversion, a regularization parameter (damping constant) can be provided to load the diagonal of the cross spectral matrix before inversion.
Note: by doing so (using a damping constant), you will smooth out your wavenumber power spectra and eventually not obtain much better results compared to the conventional beamforming approach.
Contents of output file
The output files for the high resolution f-k approach are equivalent and compatible to the output files produced with the conventional approach. For details check the following page.
Graphical display of high resolution f-k results using max2curve
The usage of max2curve is equivalent to using this tool with .max files produced with the conventional f-k approach. Check the following page for details.
References
- ↑ Capon, 1969. xxx ,IEEE Proceedings, , , .
