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In this case SEAMCAT calculates the receiver attenuation aVLR(Df) to be applied to the interfering signal by using the following expression (see Figure 105):

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(Eq. 24)   

                       

Mathinline
bodyAttenuation (f) = blockProtection Ratio(f) (dB) + C/(N+I) (dB) + (N+I)/N (dB) – I/N (dB)

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Mathinline
bodyAttenuation (f ) = 40 + 16 + 3 - 0 = 59

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dB

Mathinline
bodyiRSSblocking = Interfering Signal Level (f it ) = -54.5 - 59 = -113.5 dBm

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Figure 105: Mean iRSSblocking in case of Protection-ratio mode