A24.1 SCENARIO OVERVIEW
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This section provides an example of sharing studies including an analysis of a TETRA MS interfering with an FM BS, based on the information provided in the ERC Report 104 on “Adjacent Band Compatibility Of 400 MHz TETRA And Analogue FM PMR – An Analysis Completed Using MONTE CARLO Based Simulation Tool”. This scenario involves a population of TETRA mobile stations interfering with a victim FM base station as shown in Figure 532. In all of the simulations the victim FM system is assumed to have a 7.8 km cell radius which provides a 90 % area availability.
Figure 540: Scenario of the simulation
Figure 533 illustrates the band plan assumed for this investigation. 2 MHz of spectrum has been allocated to the up-link of TETRA and directly adjacent to this, 2 MHz has been allocated to FM.
Figure 541: Band allocations of TETRA MS and FM BS systems
The purpose of this example of simulation is to use SEAMCAT to obtain the probability of interference resulting from unwanted emissions of the TETRA Mobile Stations falling at the frequency where the FM Base Station is operating.