Timeline for Complete OFDM transmitter chain
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 2, 2023 at 15:26 | comment | added | user3005720 | iFFT is just a set of complex numbers. How do I get multiple tones which are orthogonal? What are the processing component after iFFT which gives multiple tones? I dont want to see it on a scope-trace. I want to understand mathematically how do we get multiple tones. | |
| Mar 31, 2023 at 15:04 | comment | added | TimWescott | "where I can see the multiple tones" do you mean you want to look at a scope trace and see the tones -- give up that ambition now. For arbitrary data, you'll see a scrambled-up waveform that only makes sense after you demodulate it. | |
| Mar 31, 2023 at 12:27 | history | edited | Marcus Müller | CC BY-SA 4.0 |
added 19 characters in body
|
| Mar 31, 2023 at 12:09 | vote | accept | user3005720 | ||
| Mar 31, 2023 at 10:48 | answer | added | Dan Boschen | timeline score: 2 | |
| Mar 31, 2023 at 10:24 | comment | added | Dan Boschen | As for equations to move any baseband waveform to a carrier frequency, I can provide that here | |
| Mar 31, 2023 at 10:22 | comment | added | Dan Boschen | It’s a spread modulated waveform in frequency as given by the IFFT: the multiple tones in freq as represented by the FFT become the time domain signal— the same spectrum as given by the FFT can be shifted to any carrier frequency— did you review those posts as they explain that further including showing how each tone is a modulated carrier—please let me know there in a comment what still isn’t clear. | |
| Mar 31, 2023 at 10:04 | comment | added | user3005720 | What I am looking for is how do we get multi-tone time domain expression when iFFT and up conversion to carrier is done. Is there any source for that detailing the equations. Thanks. | |
| Mar 31, 2023 at 9:48 | comment | added | Dan Boschen | This post and the other one linked in it may have a lot of the details you are looking for I believe: dsp.stackexchange.com/questions/86396/… | |
| Mar 31, 2023 at 9:43 | history | asked | user3005720 | CC BY-SA 4.0 |