Hi Jose, I would take a look at gr_sattelite. The work described here https://destevez.net/2022/07/real-time-doppler-correction-with-gnu-radio/ was integrated. A true doppler correction would need to also resample, but the time varying frequency correction may be enough for your use case.
Tim On Thu, Jul 27, 2023 at 1:19 PM Jose Ruvalcaba <joruv...@gmail.com> wrote: > > Hello, > > I am trying to simulate an accurate representation of Doppler Shift in a > channel and I was told that to do this I would have to multiply a complex > signal with a cosine and implement a resampler block to simulate the signal > samples that are coming closer or farther away from each other. > > My question is this, can I use either the rational resampler or fractional > resampler block in GNU Radio to dynamically simulate samples moving closer or > farther than each other? Or would I need to make my own OOT block to do this? > > I tried using a QT GUI Range block to change the resampling ratio of a > fractional resampler but my flowgraph froze. > > Any suggestions? > > Thanks, > Jose
