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Figure 3
Convolution kernels in (a) time and (b) frequency space that can be used for QEXAFS spectra filtering. Hereby, T is the overall number of spectra in the acquired data file and M is the number of spectra determining the width of the used kernel. The sampling frequency fm, which is the number of spectra per second here, sets the maximum frequency that can be resolved in the experiment to 0.5fm. The sinc function provides an additional parameter fg, which is used to adjust the cut-off frequency of the low-pass filter.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 19| Part 6| November 2012| Pages 920-929
https://doi.org/10.1107/S0909049512038599
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