1.2 Basic Radio Frequency Terminology
The following terminology has been developed to support the SEAMCAT simulation tool. While it is broadly in line with what is in use in ITU-R, ETSI, and CEPT, it may be expected that for other needs or documents, ETSI and CEPT/ECC will use different definitions, for example definitions more focused on specific equipment characteristics or aspects of such products.
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 (...
1.2.3 Receiver noise floor
Any practical measurement will be subject to some form of noise or unwanted signal (thermal noise...
1.2.4 Receiver sensitivity
The sensitivity of a receiver is normally taken as the minimum input signal (Smin) required to pr...
1.2.5 Wanted signal: dRSS
The victim’s wanted signal strength also called desired Received Signal Strength (dRSS), correspo...
1.2.6 Interfering signal: iRSS
The interfering Received Signal Strength (iRSS), corresponding to the interference level (I), is ...
1.2.7 Bandwidth correction factor
When the bandwidth of the interferer and the victim are different, SEAMCAT automatically applies ...
1.2.8 Desensitisation
Desensitisation (D) of the receiver in the presence of an interfering signal, given in dB, corres...
1.2.9 Blocking
The term “Blocking” is used in SEAMCAT to describe the capability of the victim receiver to recei...
1.2.10 Adjacent channel selectivity (ACS)
The receiver selectivity is often given as Adjacent Channel Selectivity (ACS) – i.e. when the con...
1.2.11 In-band, out-of-band, spurious, unwanted emission
In-band emission is understood as relating to the necessary bandwidth. The ITU-R Radio Regulation...
1.2.12 Co channel
A co-channel interference scenario can be illustrated as shown in figure below. In this case a pa...