Yes, they correct doppler in a single stream - what I was alluding to is the MIMO advantage of terrestrial networks which cannot be easily replicated from multiple satellites, as the UE cannot correct multiple doppler shifts and timing advances unless it implements an NTN-specific approach.
On Jun 4, 2024 at 20:17 -0700, David Lang <david@lang.hm>, wrote:
Mike Puchol wrote:
Something else that's much harder to implement is MIMO, as you don't get path
diversity from a satellite. AST claims they will do this by using more than
one satellite, however they haven't answered basic questions such as how will
the UE compensate the huge differences in doppler shift on top of the multiple
paths.
for the starlink version, the satellite adjusts it's transmit/receive
frequencies to correct for the doppler shift so that the phones don't need to.
David Lang