Satellite & Spectrum Flashcards
1
Q
Why is satellite needed in IoT?
A
To provide coverage where there’s no network (e.g. oceans, rural areas)
2
Q
Name two satellite systems for IoT.
A
Iridium (LEO), Inmarsat (GEO)
3
Q
What is LEO vs GEO?
A
LEO = low orbit, fast; GEO = high orbit, wide area
4
Q
How is 18 MHz split for 3 Wi-Fi channels?
A
1.5 MHz guard bands + 3 × 5 MHz channels
