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4.8
4.8
If a minimum protection distance  between the victim link receiver and interefering interfering link transmitter is introduced then the simulation radius may then be calculated by using the following formula:

                                                                                

...

Mathinline
body{{R}_{simu}}=\sqrt{\frac{{{n}^{active}}}{\pi \ \times dens_{it}^{active}pro{{b}_{transmission}}}+d_{0}^{2}}
    (Eq. 30)

Note: The calculation of the iRSS at each trial will be performed only if the location of the ILT satisfies the following condition Image Removed

Unit
body${{d}_{it\to vr}}\ge {{d}_{0}}$
.

Figure 129 presents how to set-up SEAMCAT (See also A13.2 for further details).

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Figure 129: Setting up the protection distance related to the simulation radius with 1 active interferer

The simulation radius (see Figure 131) may then be calculated by using the following formula:

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...

Mathinline
body{{R}_{simu}}=\sqrt{\frac{1}{\pi \ \ \times 10}+{{(0.5)}^{2}}}$.= 0.531 km


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Figure 130: Calculated simulated radius


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Figure 131: Calculation of the simulation radius and the iRSSunwanted using the protection distance (for 1 active interferer)

...

If the distance between the VLR and the ILT is equal to the protection distance (0.5 km), then:

                       

...

Mathinline
bodyiRSSunwanted = 33 (dBm) + 11 + 9 - (32.5 + 10 log(0.5 x 0.5) + 20 log(1000)) = -33.

...

5dBm
    

 

If the distance between the VLR and the ILT is equal to the simulation radius (0.531 km), then:

...

                        

Mathinline
bodyiRSSunwanted = 33 (dBm) + 11 + 9 - (32.5 + 10 log(0.531 x 0.531) + 20 log(1000)) = -34 dBm

 


These results are in line with those depicted on Figure 131. We can then increase the number of active transmitters to 10 as shown in Figure 132.


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Figure 132: Setting up the protection distance related to the simulation radius with 10 active interferer

The simulation radius may then be calculated by using the following formula (see Figure 133 for the result):

 

Mathinline
body{{R}_{simu}}=\sqrt{\frac{10}{\pi \ \ \times 10}+.5\times 0.

...

5}$ = 0.75 km

             

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Figure 133: Calculation of the Rsimu and the iRSSunwanted using the protection distance
(for 10 active interferer)

If the distance between the VLR and a single ILT is equal to the protection distance, then:

...

                       

Mathinline
body iRSSunwanted = 33 (dBm) + 11 + 9 - (32.5 + 10 log(0.5 x 0.5) + 20 log(1000)) = -33.5 dBm

If the distance between the VLR and a single ILT is equal to the simulation radius, then:

...

Mathinline
bodyiRSSunwanted = 33 (dBm) + 11 + 9 - (32.5 + 10 log(0.75 x 0.75) + 20 log(1000)) = -37 dBm

If 10 transmitters are deployed around the VLR then:

...

Mathinline
bodyiRSSunwanted = -37 (dBm) + 10 log(10) = -27 dBm

...

 and 
Mathinline
bodyiRSSunwanted = -33.5 (dBm) + 10 log(10) = -23.5 dBm

                       

Mathinline
body-27 dBm <

...

iRSSunwanted < -23.5 dBm
 (see Figure 133)