Ultimately it would seem that the frequency domain is as real as it needs to be, albeit that its appearance is wholly dependent on the algorithm used to create it, whether this the DFT, DCT, WHT ...

Difference between frequency- and time-domain analysis. ... With the TDR functionality, it’s possible to “filter” the gain-frequency graph with a filter in time.

When analyzing data, one can use a variety of transformations on the data to massage it into a form that works better to tease out the information one is interested in. One such example is the appl… ...

Version 4.0 of IRPLBDA4 ballast-design software has recently added features that include support for dc input voltage applications and a time domain graph function. The graphing feature is based ...