ND SatCom SKYWAN IDU 7000, Manual

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2010-10-26 Network Design and Engineering Guide 101
Outdoor Unit and Satellite Link Design
Link Budget Examples
Satellite Transponder Data
Figure 3-34 Scenario 1 - Ku-Band Transponder Data
Antenna Data
Figure 3-35 Scenario 1 - Ku-Band Antenna Data
Optimizations
The result of user traffic and TDMA calculation for this network was a total modem data rate
requirement of 8625 kbps. Preliminary link calculation showed that a single carrier solution
would lead to a very high power requirement for the earth stations.
Therefore it was decided to split the capacity into two carriers, the master stations using carrier
1 and the slave stations carrier 2. The following requirements were defined:
Table 3-5 Scenarion 1 - 2 Carrier Solution Requirements
Carrier 1 Carrier 2
Topology Mesh in ULA1 Mesh in ULA1
Modem rate [kbps] 4760 3865
Gross container size [Byte] > 200 > 200
BER max. 10
-8
10
-8
Rain availability min. [%] 99.5 99.5