Skip to main content

4.5 Coverage radius (VLR-VLT)

In this section the Free Space Model is used to derive the attenuation on the different paths and the Victim Link and Interfering Link operate at the same frequency – 1000 MHz – co-channel interference. Figure 115 presents an illustration of the various radii (i.e. coverage radius and simulation radius) that are used in SEAMCAT and with reference to the various pairs of transmitters and receivers used for a simulation.

image.png

Figure 111: Illustration of the Coverage Radius and the Simulation Radius with respect to the pairs of transmitters and receivers of the victim and interfering links

 

 

The distance between the VLT and the VLR is referred to as the coverage radius (image.png) (see ANNEX 13:). In the case of mobile applications, the number of terminals that may transmit in a given cell of the network is given by:

image.png

        (Eq. 25)

 

The calculation of the coverage radius can be found in ANNEX 13:.

The cluster characterises the frequency re-use of a mobile network (see Figure 112).

image.png

Figure 112: Frequency cluster

 

image.png

 (Eq. 26)

 

 

 

image.png

Figure 113: Calculation of the victim link coverage radius

 

 

(Eq. 27)

image.png

 

 

 

Figure 115 presents the results of the dRSS vector and the results in the coverage radius of the victim link.

The dRSS for a receiver located at the edge of the coverage area may be calculated:

                                           dRSS = 30 (dBm) + 9 + 9 - (32.5 + 10 log(1.43^2) + 20 log(1000)) = -47.5 dBm

image.png

Figure 114: Resulting dRSS distribution

 

 

image.png

Figure 115: Calculation results of the victim link coverage radius

 

 

image.png

Figure 116: Illustration of the VLR and VLT positioning based on the traffic limited network coverage radius (ILT-red, ILR-green, VLR-yellow, VLT-blue)

 

 

Back to top