Compare Pre assigned FDMA and Demand assigned FDMA

Mumbai University > Satellite Communication and Networks

Topic : Space Segment Access and Utilization

Marks: 5M

1 Answer
Pre assigned FDMA Demand assigned FDMA
A station has periodic access to the channel independent of its actual need It gives the station access to the channel only when it requests access
Best applied to high capacity commercial system For intermittent traffic the demand assignment is more efficient.
Less efficient More efficient than the preassigned ones
No control mechanism required Increases the cost of the system because it requires control mechanism
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