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3.3 Calculating the iRSS

3 Example of running a simulation

3.3.0 Objective

3 Example of running a simulation 3.3 Calculating the iRSS

3.3.1 Interfering Links

3 Example of running a simulation 3.3 Calculating the iRSS

The characteristics of the interefering system summarised in Table 7 should be entered into the SEAMCAT simulation scenario. For this example only one interfering link will be simulated.  Table 7: Characteristics of the interfering link pair of transmitter and...

3.3.2 System to be an interferer

3 Example of running a simulation 3.3 Calculating the iRSS

Contrary to the victim link, is possible to set more than one interfering link in your simulation. A given simulation workspace must contain at least one interfering link. First edit the technical characteristics of the system(s) that will be used as interfere...

3.3.3 Transmitter

3 Example of running a simulation 3.3 Calculating the iRSS

Set now the victim link transmitter by selecting the transmitter tab: the Interefering link transmitter uses a Power of 33 dBm; (#1 of Figure 86) the Interefering link transmitter uses an omni-directional antenna of 11 dBi gain; (#2) the Interefering lin...

3.3.4 Receiver

3 Example of running a simulation 3.3 Calculating the iRSS

For this exercise, the Power Control is not activated, therefore there is no need to fill in any information about the Interfering link receiver.

3.3.5 Positioning of the ILT vs ILR

3 Example of running a simulation 3.3 Calculating the iRSS

Positioning of the ILT vs ILR is similar to positioning VLT vs VLR as described in Section 3.2.5. This is required when the power control in the interfering link is simulated. It is also important to set it in case the geometry of the scenario is dependant on ...

3.3.6 Positioning of the VLR vs ILT

3 Example of running a simulation 3.3 Calculating the iRSS

SEAMCAT allows defining the relative location between the Victim link receiver and the Interefering link transmitter as illustrated in Figure 88. The input parameters are detailed in section 10.3, and the algorithms are detailed in ANNEX 13: Figure 88: Summar...

3.3.7 Calculating the iRSS by hand

3 Example of running a simulation 3.3 Calculating the iRSS

Figure 91: Illustration of SEAMCAT display (only 1 snapshot) of the various pair of transmitter and receiver and the dRSS and iRSS relationship The attenuation between the Interefering link transmitter and the Victim link receiver is simulated by using the fr...

3.3.8 Emission, reference, VLR bandwidth relationship and bandwidth correction factor

3 Example of running a simulation 3.3 Calculating the iRSS

The proposed exercise considers the case where the VLR bandwidth is the same as the emission bandwidth and the reference bandwidth.  This section aims at illustrating the interaction between the emission bandwidth (ItBW), reference bandwidth (Bref), VLR bandwi...

3.4 Launching a simulation

3 Example of running a simulation

A simulation is now ready to be launched. It should be noted that prior to beginning the simulation, SEAMCAT checks the consistency and suitability of certain input parameters (see ANNEX 19:). Since the default operating frequency of the Interfering link trans...

3.5 Extract results vectors (dRSS, iRSS etc...)

3 Example of running a simulation

You can extract the dRSS vectors from the “Results” panel in the newly create workspace results in Figure 95   Figure 95: Results panel to extract any of the vectors generated by SEAMCAT   Figure 96: Example of the dRSS vector     When d...

3.6 Calculating the probability of interference

3 Example of running a simulation

Objective

3 Example of running a simulation 3.6 Calculating the probability of inte...

  After the simulation of all events has completed, SEAMCAT will have calculated and stored the dRSS and iRSS vectors. Now it is possible to evaluate the probability of interference for the simulated scenario using the interference calculation cont...

3.6.1 Compatibility calculation mode

3 Example of running a simulation 3.6 Calculating the probability of inte...

It is then possible to derive the C/I (i.e. dRSS/iRSS equivalent to dRSS-iRSS in dB): dRSS/iRSS = -53.5-(-54.5) = 1 dB                                                 Since the resulting C/I is below the protection criteria (19 dB), the probability of interfe...

3.6.2 Translation calculation mode

3 Example of running a simulation 3.6 Calculating the probability of inte...

When the Translation mode is chosen, it is possible to calculate and display a chart of the probability of interference as a function of one of the following input parameters: Output power of Interefering link transmitter; Blocking response level of Victim...

3.6.3 Example of probability of interference calculation

3 Example of running a simulation 3.6 Calculating the probability of inte...

The protection criteria to be used for the calculation of the probability of interference and the type of interference to be considered (unwanted and/or blocking) can be equally chosen (see Figure 97).   Using the unwanted mode, it is possible to derive the C/...

4 Example of calculations

This section presents examples on how to use SEAMCAT to calculate Interference mechanism described in ANNEX 5: