Editors note: this section may be reviewed due to future updates in the implementation

As pointed out on the introduction to this Annex, the implemented algorithm for the calculation of the impact due to blocking supposes a constant (flat) shape of the blocking mask over the complete bandwidth of the interfering system. This approach might cause inaccuracies, in particular in case of larger bandwidths of the ILT.

When simulating cellular environment like LTE, the 3GPP standard provides different ACS values depending on the bandwidth of the interferer. For instance, it is known that LTE can support flexible channel bandwidth, 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20MHz. Therefore, in order to be able to deal with more LTE co-existence scenarios in the future, it is unavoidable to support scenarios with different bandwidth interferers.

SEAMCAT is basically able to handle such a case. You may define scenario specific blocking masks, that means for each combination of VLR and ILT frequency allocations separate masks. Some guidance is given by e.g. ETSI TR 136 942 V12.0.0 (2014-10) on section 12.1.3.2. You should exercise caution and not mixing the ACIR (Adjacent Channel Interference Ratio) the standard is talking about with the blocking values required for the SEAMCAT masks.

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