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When you are appointed the Chair/Secretary of a group, you will automatically be set for some elevated rights. This page will briefly list what these are, and how you use them.   Right Purpose Access to protected files Manage pages ...

This is a short guide how to install the Signal app on your mobile device and setup an account. Step 1: Download Signal On your phone (Android/iOS): Go to the Google Play Store (Android) or App Store (iOS). Search for "Signal Private Messenger". ...

ECO are the custodian of PT and WG groups on Signal. When a chat group associated with a CEPT portal group is created, we will upload the signal access QR code on the CEPT portal in the relevant group.  The QR connection code will only be visible for group me...

Set a Signal Handle ( Username) A Signal Handle or username can be used instead of your telephone number when connecting with other people. It also generates a QR code that can bed used to connect with eachother. Tap your profile picture - and find the se...

The radio spectrum is a limited resource and can only be used optimally if compatibility is assured between wireless systems located in the same or adjacent frequency bands. For example, an important criterion for radio compatibility is the difference between ...

The thermal noise (in Watts) expressed in power level is defined as:  where:                                             kB is the Boltzmann's constant 1.38 x 10-23 in joules per kelvin (J/K), T is the receiver absolute temperature in Kelvin (K), ...

Noise figure (NF) and noise factor (F) are measures of degradation of the signal-to-noise ratio (SNR), caused by components in a radio frequency (RF) signal chain. It is a number by which the performance of an amplifier or a radio receiver can be specified, wi...

Any practical measurement will be subject to some form of noise or unwanted signal (thermal noise or interfering signals). The noise floor limits the smallest measurement that can be taken with certainty since any measured amplitude cannot on average be less t...

The sensitivity of a receiver is normally taken as the minimum input signal (Smin) required to produce an output signal with a specific signal-to-noise (S/N) ratio. S/N is a required minimum ratio, if N is increased, then S must also be increased to maintain t...

The victim’s wanted signal strength also called desired Received Signal Strength (dRSS), corresponding to the carrier level (C), is calculated as a simple link budget between the victim link receiver (VLR) and the victim link transmitter (VLT) as described in ...

The interfering Received Signal Strength (iRSS), corresponding to the interference level (I), is calculated as a link budget between the VLR and the interfering link transmitter (ILT) as described in ANNEX 5:. The various interference mechanisms resulting in d...

When the bandwidth of the interferer and the victim are different, SEAMCAT automatically applies a bandwidth correction factor to calculate the unwanted emission power for a specific bandwidth. The following example introduces an interferer transmitting 2 W. T...

Desensitisation (D) of the receiver in the presence of an interfering signal, given in dB, corresponds to the ‘noise rise’ or ‘noise augmentation’ due to the interfering signal and is derived by the following equation in dB:                                    ...

The term “Blocking” is used in SEAMCAT to describe the capability of the victim receiver to receive a wanted modulated signal without exceeding a given degradation due to the presence of an unwanted input signal on a different frequency than the one of the wan...

The receiver selectivity is often given as Adjacent Channel Selectivity (ACS) – i.e. when the concept of "channel" has been defined for the system being considered. As the wording suggests, this parameter defines the requirement in case one single ILT is set a...

In-band emission is understood as relating to the necessary bandwidth. The ITU-R Radio Regulations define the followings in Nos. 1.152, 1.144, 1.145 and 1.146: 1.152 Necessary bandwidth: For a given class of emission, the width of the frequency band which is j...

A co-channel interference scenario can be illustrated as shown in figure below. In this case a part or the whole component of the interference is within the receiver bandwidth of the victim receiver. Figure 4: Co-channel interference scenario

The statistical methodology used as a basis for SEAMCAT is the Monte Carlo method. Statistical simulation methods may be contrasted to conventional analytical methods, which are typically applied to ordinary or partial differential equations that describe som...