The number of active transmitters that will be uniformly located within the simulation radius is given by:
(Eq. 28)
Figure 124 presents the GUI with the input value.
Settings in the System tab | Settings in the Scenario tab |
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Figure 124: Setting up the simulation radius in SEAMCAT
(Note that the results of the simulation radius is displayed only after running simulation)
The simulation radius is calculated by using the following formula:
(Eq. 29)
In the example of Figure 124, this gives:
Figure 125: iRSS using the simulation radius for 1 active transmitter (R=0.178)
Figure 126: Calculated simulation radius with 1 active transmitter
Then for a single interefering link transmitter located at the edge of the simulation radius (R = 0.178 km), the iRSSunwanted may be calculated:
iRSSunwanted = 33 (dBm) + 11 + 9 - (32.5 + 10 log(0.178^2) + 20 log(1000)) = -24.5dBm
When increasing the number of active transmitters to 10 (see Figure 127), the simulation radius becomes:
Then, for a single interefering link transmitter located at the edge of that simulation radius (R = 0.564 km), the iRSSunwanted resulting from this terminal may be calculated as:
iRSSunwanted = 33 (dBm) + 11 + 9 - (32.5 + 10 log(0.564^2) + 20 log(1000)) = -34.5dBm
If 10 active terminals are located at the edge of the simulation radius, the iRSSunwanted may be calculated in the following way:
iRSSunwanted = -34.6 (dBm) + 10 log(10) = -24.5 dBm
Then the iRSSunwanted should be above -24.5 dBm as shown on Figure 128.
Figure 127: Setting up the simulation radius in SEAMCAT with a different
number of active transmitters
Figure 128: iRSS using the simulation radius calculated for 10 active interferers (R=0.564 km)
Figure 129: Calculated simulation radius with 10 active transmitters