Satellites use the same technique as wifi to transmit data from dishes on the ground to the satellite and back. There are differences in frequency and application, but the core modulation is the same.
Satellites use the same [Orthogonal Frequency Division Modulation (OFDM)](https://en.m.wikipedia.org/wiki/Orthogonal_frequency-division_multiplexing) technique as wifi to transmit data from dishes on the ground to the satellite and back. There are differences in frequency and application, but the core modulation is the same.
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