Fourier analysis aliasing

There are of course problems, common to any analyses requiring numerical Fourier transformations, of aliasing, truncation, and time referencing. Happily, these can be handled quite readily for dielectric problems because the pulse forms to be transformed are relatively simple and because effects of apparatus response characteristics and unwanted reflections can be eliminated or minimized by judicious apparatus design and use. In the sections that follow, we present basic analysis of TDS measurements, useful sample cell designs and working equations, methods for evaluation of transforms involved, and representative results. 

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