A coverage radius is calculated for both the victim link and the interfering link. It is the 
for the victim link (VLR-VLT) and the 
for the interfering link (ILR-ILT) (see Annex A13.1). The receivers will be randomly deployed within the area centred on the transmitter and delimited by the coverage radius if the non-correlated option is selected.
Three different modes are available for calculating the maximum radius .
- User-defined radius option allows you to enter the maximum radius directly (See Annex A13.1.1);
Figure 155: User-defined coverage radius dialog box
Table 16: Description on User-defined coverage radius
Description | Symbol | Type | Unit | Comments |
Coverage radius | Rmax | S | km | Input a coverage radius, and fix it with a path loss constant or make little variation around this radius. Useful to give a fixed value for the coverage radius. The origin of the coverage radius is the Victim link transmitter |
- Noise-limited network option will calculate the coverage radius, based on the formula for noise-limited network. If this option is chosen, a set of input boxes will appear below allowing user to enter specific parameters required for this calculation. In this case it is considered that the coverage of the transmitter is limited only by propagation losses and other elements of link budget, with received signal operating at the very sensitivity limit. The detailed of the calculation is given in Annex A13.1.2.
Figure 156: Noise limited network coverage radius dialog box
The coverage radius in the noise-limited network is defined by the parameters of Table 17. Note that the input parameter of the Noise-limited network interface are set to zero by default in purpose to allow you to define the radius independently from some parameters set elsewhere in the link.
Table 17: Description of the Noise limited network coverage radius user interface
Description | Symbol | Type | Unit | Comments |
Reference antenna height (receiver): | h0 | S | m | The height used for coverage radius calculations. If a distribution is used to define the real height, the coverage radius would be different in each trial, here the value may be fixed. |
Reference antenna height (transmitter): | h0 | S | m | The height used for coverage radius calculations. |
Reference frequency | fVLR | S | MHz |
|
Reference power | PVLT | S | dBm |
|
Minimum distance |
|
| km |
|
Maximum distance |
|
| km |
|
Availability |
|
| % |
|
Fading standard deviation |
|
| dB |
|
Reference percentage of time |
|
| % |
|
- Traffic-limited network option will calculate the coverage radius, based on the formula for traffic-limited network. If this option is chosen, a set of input boxes will appear below allowing user to enter specific parameters required for this calculation (See Annex A13.1.3).
Figure 157: Traffic limited network coverage radius dialog box
Table 18: Description of the traffic limited network coverage radius user interface
Description
Symbol
Type
Unit
Comments
Density
S
1/km2
Maximum number of active transmitter per km2
Number of channels
S
Number of frequency channels that a radio system provides
Number of users per channel
S
Number of MS per frequency channel provided by a radio system
Frequency cluster
S
Size of a group of frequency channels. See Figure 180 for illustrative details.
You should check the consistency of this parameter with the sensitivity, so that if a receiver is placed at given distance such as the maximum coverage radius, the received power is higher than the sensitivity for a reasonable percentage of time (availability).