Timeline for DSP: newbie not understanding z transform/complex sinusoidal frequency and phase
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
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| Jul 13, 2021 at 0:30 | comment | added | user3394004 | Okay, so I've reviewed some math stuff and I can implement the z transform, the mathematical steps are easy, but still don't have a clear intuition for what's actually happening. It seems like your explanation in places is just restating what I wrote in a less ELI5 way. | |
| Jul 10, 2021 at 12:14 | comment | added | Dan Boschen | As this can be a point of confusion - Depending on what we call “frequencies” for example if we refer to the frequency bins in the DFT as the frequencies of a waveform (as is common to do hence my clarification) they do have phase (especially when OP refers to “these complex frequencies”) - to be more precise, phase is a rotation on the complex plane and not a delay. So the phase of “these frequencies” is the starting angle from which the time domain of “that frequency” as a complex phasor would then rotate. So each frequency component does have a magnitude and phase. | |
| Jul 9, 2021 at 2:49 | comment | added | robert bristow-johnson | +1 Tim. For the comment. | |
| Jul 7, 2021 at 6:20 | comment | added | user3394004 | Okay. I'll review diffy q and then pick up a different course or book. That sounds like it might be necessary. | |
| Jul 7, 2021 at 4:53 | comment | added | TimWescott | Having answered your specific questions -- in my opinion, you have a book that's giving you a technician's gloss-over of DSP, but you've got a mind that probably needs the full treatment. You may want to find those brain cells that learned differential equations five years ago, kick them out of bed and tell them to wake up. Then get a real DSP book and work through it. Khan Academy lists a Signals and Systems course; I know that MIT puts a number of courses up. Working through such a course will be work, but I suspect you'll get the level of understanding you seem to need. | |
| Jul 7, 2021 at 4:50 | history | answered | TimWescott | CC BY-SA 4.0 |