Table 3-6 Scenario 1 - Carrier Coding And Bandwidth; Table 3-7 Scenario 1 - Summarized Power Requirements; Figure 3-36 Scenarion 1 - 2 Carrier Solution Stations - ND SatCom SKYWAN IDU 7000 Manual

Outdoor Unit and Satellite Link Design
Link Budget Examples
For the stations as a first try we use 2.4m antennas on every site. Then the station parameters
are given by:
Figure 3-36 Scenarion 1 - 2 Carrier Solution Stations
Now we calculate the link budget under the constraint that the power requirement for every site
should not exceed 30 W. That allows the use of following modulation and coding choices and
resulting bandwidths:
Meshed Network
Modulation
FEC
Estimated Symbol
Rate [ksps]
Table 3-6 Scenario 1 - Carrier Coding and Bandwidth
The power requirements for the individual earth stations can be summarized in following table:
Meshed Network
Home Channel
Power requirement [W]
Amplifier power class [W]
Power equivalent band-
width [kHz]
with UPC (Home Channel)
Carrier bandwidth [kHz]
(Home Channel)
Table 3-7 Scenario 1 - Summarized Power Requirements
102
Carrier 1
8PSK
2/3
2713
Madrid Berlin
1 1
9.5 6.6
20 8
1064 983
3256 3256
Network Design and Engineering Guide
Carrier 2
QPSK
2/3
3200
Rome
2
9.3
20
552
3840
Total bandwidth re-
quired ( carrier spac-
ing = 1.2) [KHz]
7096
Casablanca Tunis
2 2
25.2 12.8
30 20
1125 542
3840 3840
2010-10-26