There were some experiments with communicating over Iridium to small cube-like sats back in the day, but we couldn't make the system on a chip beefy enough to d

There were some experiments with communicating over Iridium to small cube-like sats back in the day, but we couldn't make the system on a chip beefy enough to do the Doppler shift calculations on the fly and survive a launch; it was close though. I think its possible to do now.