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For simplification, we consider that the Victim link receiver and the Interefering link transmitter are defined using the following assumptions (1 km distance between the Victim and the Interefering link transmitter). This is illustrated in Figure 134.
Figure 134: Setting up the distance between the Interfering and the Victim pair of Anchor F138F134F138 F134
transmitter and receiver
If the power control is not activated then the iRSSunwanted is (see Figure 135):
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Mathinline body iRSSunwanted = 33 (dBm) + 11 + 9 - (32.5 + 10 log(1) + 20 log(1000)) = -39.5 dBm
Figure 135: iRSSunwanted without power controlAnchor F139F135F139 F135
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The same assumption is used for the distance between ILT and the ILR (i.e. x = 0 km and y = 1 km) where the ILT is the (0,0) origin as shown in Figure 136.
Figure 136: Setting up the distance between the Interfering link transmitter and the Interfering link receiver to evaluate the dRSSInterfering link receiver.Anchor F140F136F140 F136
The power received by the Interfering link receiver (dRSSInterfering link receiver) is then:dRSSInterfering
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Note: You should not confuse the dRSSInterfering link receiver and the dRSSVictim link receiver. Figure 111 illustrates their differences.
The power control can be input as shown in Figure 137.
Figure 137: Setting up the power control for the interfering linkAnchor F141F137F141 F137
Using these assumptions, the results of the simulation are the same as previously since the threshold (-35 dBm) is above the dRSSInterfering link receiverreceiver (-37.5 dB). This corresponds to the Case 1 described in ANNEX 14:.
Now, if the threshold is decreased from –35 dBm to –50 dBm (see Figure 138)
Figure 138: Reduction of the minimum threshold in the PCAnchor F142F138F142 F138
Since, the power control feature is activated the gain of the power control is determined according to the guidance given in ANNEX 14: on page 344. Since the dRSSInterfering link receiver is –37.5 dBm and:
Mathinline body -50 dBm (PC threshold) + 2 * PC step (5 dB) < –37.5 dBm < -50 dBm (PC threshold) + 3 * PC step (5 dB)
The gain of the power control (git PC) is 10 dB (Case (i+1) in ANNEX 14:). This means that the iRSSunwanted will be decreased by 10 dB, i.e. :
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Mathinline body iRSSunwanted = -39.5 dBm -
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git PC
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= -49.5 dBm
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Finally, if the threshold is decreased from –50 dBm to –70 dBm, the power control feature is activated. Since the dRSSInterfering link receiver is –37.5 dBm, this results in:
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The gain of the power control is 20 dB (Case (n_step + 2) in ANNEX 14:). This means that the iRSSunwanted will be decreased by 20 dB, i.e. :
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Mathinline body iRSSunwanted = -39.5 dBm -
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git PC
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= -59.5 dBm