3 ms·

Here's the reason that the FAA is currently attempting to block this. I'd love to see more real-world testing, and a commitment from the telcos that _if_ interf

• p_l 5y ago
  If you read into more detail, it's also easily seen that outside of Japan only few countries tentatively allowed business verticals in the 3.8GHz-4.0GHz range, it's just european "mid-band" overlaps 3.7GHz-3.98GHz that is proposed as a block in USA - and where FAA complains about frequencies closer to 4GHz (4.0 GHz to 4.2 GHz being radar altimeter range)
  • g_p 5y ago
    To add a data point, the UK makes available 3.8 to 4.2 GHz spectrum on a local basis (with some transmit power limits), nominally for "verticals" and private networks. Not aware of any issues with radio altimeters, but the power limits might help in this context too.
    • p_l 5y ago
      Might be also a case of locations being considered far away enough from established effective flight paths