A2.3 INTERFERENCE CALCULATION COMBINATION

Unwanted only

Calculate the probability of interference by only considering the iRSS_unwanted

Blocking only

Calculate the probability of interference by only considering the iRSS_blocking

Intermodulation only [1]

Calculate the probability of interference by only considering the iRSS_intermod

Blocking + unwanted

Calculate the probability of interference by considering both the iRSS_unwanted and iRSS_blocking

Blocking + unwanted +

intermodulation

Calculate the probability of interference by considering the iRSS_{unwanted ,} iRSS_blocking and
iRSS_intermod

Overloading only

Calculate the probability of interference resulting from the overloading only for a given total number of events where the dRSS > sensitivity. The resulting probability is

P_overloading = 1 - ( N_{good_overloading} /N_all)

and

N_{good_overloading} = N_all - N_overloaded

where:

• Nall is the number of event where dRSS > sensitivity,
• Ngood_overloading is the number of “good” events from overloading (i.e. not overloaded).
• Noverloaded is the number of event when the receiver is overloaded.

e.g. For 100 events simulated, dRSS > sensitivity occurred for N_all (=70 events). Out of N_all, the overloading occurred for N_overloaded (=30 events).

Therefore the probability of interference of overloading only is P_overloading =1-(40/70).

Overloading + blocking

Calculate the probability of interference resulting from the overloading and from the blocking for a given total number of events where the dRSS > sensitivity. The resulting probability is

P_{overloading+blocking} = 1 - ( (N_{good_overloading+blocking})/N_all )

and

N_{good_overloading+blocking} = N_all - N_overloaded - N_blocked

where:

• Nall is the number of event where dRSS > sensitivity,
• Ngood_overloading+blocking is the number of “good” events from the combined overloading and blocking mechanism.
• Noverloaded is the number of event when the receiver was overloaded.
• Nblocked is the number of event which were inpaired by  blocking (i.e. receiver blocked). It is obtained from the comparison with the iRSSblocking and a specific interference criterion (C/I, I/N etc..)

e.g. For 100 events simulated, dRSS > sensitivity occurred for N_all (=70 events). Out of N_all, the overloading occurred for N_overloaded (=30 events). The iRSS_blocking is then calculated over the (70-30=) 40 remaining events. Number of good events resulting from blocking, N_blocked, is based on the comparison between the iRSS_blocking and a specific interference criterion over these 40 events. Let say that for N_blocked = 25 events out of 40 the receiver is blocked.

Therefore the probability of interference of the combined overloading and blocking is P_{overloading+blocking}= 1 - ( (40 - 25)/70 )

Overloading + blocking + unwanted

Same principle as above except that the iRSS_comp (=iRSS_blocking+iRSS_unwanted) is considered in the comparison to a specific interference criterion

Overloading + blocking + unwanted +

intermodulation

Same principle as above except but additionally considering iRSS_intermod  on iRSS_comp

Overloading  + unwanted

Same principle as above except that the iRSS_unwatnted is compared to a specific criterion