| Anchor | ||||
|---|---|---|---|---|
|
Using the unwanted mode, it is possible to derive the C/I:
...
Since the resulting C/I is above the protection criteria (19 dB), the probability of interference calculated by SEAMCAT (Interference calculation) is equal to 0 (see Figure 100 (a)).
The same conclusion is reached by using the C/(N+I) criteria. It should be noted that SEAMCAT performs a consistency check (ANNEX 19:) between the interference criteria (ANNEX 3:).
It is also possible to derive the (N+I)/N= -77.5-(-100)= 22.5 (since I>>N). Since the (I+N)/N which is obtained is above the protection criteria (3 dB), the probability of interference calculated by SEAMCAT (Interference calculation) is equal to 1 (see Figure 100(b)).
The same conclusion is reached by using the I/N criteria.
...