SHAPING THE FUTURE OF SATELLITE COMMUNICATIONS
9.1.1.2 Why ACM
An ACM system provides two major benefits:
• It always maximizes the throughput of a satellite link, doubling the capacity in
average;
• It guarantees the availability of the link reception.
The circumstances in which satellite connections are active can change all the
time, due to e.g. changing weather conditions.
Imagine we have an optimal satellite connection between two sites in clear
weather.
At this moment the satellite link has the following settings:
• High ModCod;
• High throughput;
• Good signal quality;
In these ideal circumstances and without fade, a high ModCod can be used, and
the throughput over the satellite link is high.
Imagine it starts raining heavily at the receiving end.
The consequence is that the signal quality is decreased.
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