3
OUTDOOR UNIT AND SATELLITE LINK
DESIGN
In the previous chapter 'General Carrier Design' we discussed how to derive optimized Sky-
®
WAN
TDMA carriers from user traffic requirements. In this chapter we discuss how to perform
link budget calculation for SkyWAN
to optimize links and the outdoor equipment of earth stations.
The next steps in the engineering process are
-
the choice of a suitable satellite rsp. satellite transponder(s) and
-
an optimized outdoor unit design.
3.1
Introduction
The general principle of the satellite link and outdoor unit design may be summarized by the
following steps as shown in figure 3-1.
Figure 3-1
Steps for Outdoor Unit and Satellite Link Design
Select Satellite Transponder
Start with selecting a suitable satellite transponder (task B1 in figure 3-1). The necessary input
for this task are
-
the geographical location of the earth stations
-
information about footprint disadvantages like rain fade or the coverage of the satellite
transponder beam.
2010-10-26
®
networks using the ND Satcom Link Budget tool and how
Network Design and Engineering Guide
Outdoor Unit and Satellite Link Design
Introduction
73
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