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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...
1.2.3 Receiver noise floor
Any practical measurement will be subject to some form of noise or unwanted signal (thermal noise...
1.1 Background to spectrum engineering
The radio spectrum is a limited resource and can only be used optimally if compatibility is assur...
1.2.1 Receiver thermal noise
The thermal noise (in Watts) expressed in power level is defined as: where: ...
1.2.2 Noise figure and Noise factor
Noise figure (NF) and noise factor (F) are measures of degradation of the signal-to-noise ratio (...
Release history
ECO maintains a continuing list of improvements and corrections that we implement. These release...
Signal Tips and Tricks
Set a Signal Handle ( Username) A Signal Handle or username can be used instead of your teleph...