Recently Updated Pages
1.4.10 Interference calculation
SEAMCAT calculates the probability of interference for generic (i.e. non-cellular) victim systems...
1.4.9 Combined interference mechanism
The combination of the unwanted emissions and receiver blocking can also be studied simultaneousl...
1.4.8 Overloading
Overloading threshold is the minimum interfering signal levelat which the receiver loses its abil...
1.4.7 Intermodulation
The intermodulation interference, i.e. the power of intermodulation products, reduced by the inte...
1.4.6 Receiver blocking
The level of interference determined by the interferer’s transmit power, the antenna gains and pr...
1.4.5 Unwanted emissions
The level of unwanted emissions ( i.e. consisting of the out-of-band emissions and the spurious ...
1.4.4 Interference criteria relationship
C/I may vary typically from 9 dB (e.g. for QPSK) to 26 dB or higher (e.g. for 64QAM…). By introdu...
1.4.3 Methodology associated to the interference criterion (C/I, C/(I+N), (N+I)/N, I/N)
Four interference criteria are considered within SEAMCAT: C/I : Carrier to interference...
1.4.2 An illustration with C/I as interference criterion
The C/I ratio available at the victim receiver’s input is computed using both the iRSS (Interferi...
1.4.1 Introduction
In this section the interference calculations for ‘generic’ systems are described. Cellular syste...
1.3 Monte-Carlo Basics
The statistical methodology used as a basis for SEAMCAT is the Monte Carlo method. Statistical s...
1.2.12 Co channel
A co-channel interference scenario can be illustrated as shown in figure below. In this case a pa...
1.2.11 In-band, out-of-band, spurious, unwanted emission
In-band emission is understood as relating to the necessary bandwidth. The ITU-R Radio Regulation...
1.2.10 Adjacent channel selectivity (ACS)
The receiver selectivity is often given as Adjacent Channel Selectivity (ACS) – i.e. when the con...
1.2.9 Blocking
The term “Blocking” is used in SEAMCAT to describe the capability of the victim receiver to recei...
1.2.8 Desensitisation
Desensitisation (D) of the receiver in the presence of an interfering signal, given in dB, corres...
1.2.7 Bandwidth correction factor
When the bandwidth of the interferer and the victim are different, SEAMCAT automatically applies ...
1.2.6 Interfering signal: iRSS
The interfering Received Signal Strength (iRSS), corresponding to the interference level (I), is ...
1.2.5 Wanted signal: dRSS
The victim’s wanted signal strength also called desired Received Signal Strength (dRSS), correspo...
1.2.4 Receiver sensitivity
The sensitivity of a receiver is normally taken as the minimum input signal (Smin) required to pr...