1. Cellular concept Propagation models
Cellular System
Cellular concept
Propagation models

2. Introduction to Mobile Systems Cellular System Concept

3. The factor N is called the cluster size and is given N=i2+ij+j2

4. To find the nearest co-channel neighbor of a particular cell, one must do the following:
move i cells along any chain of hexagons and then
turn 60 degrees counter-clockwise and move j cells.

5. i=1, j=2 , N=1+2+4=7

6. Interference R - the radius of the cell
D - the distance between centers of the nearest co-channel cells
Q - the co-channel reuse ratio

7. Table 1. Co-channel reuse ratio, S/I for some values of N

8. Decreasing the co channel interference - sectorisation

9. Decreasing the co channel interference - sectorisation
Table 2. Co-channel reuse ratio, S/I for values of N=7 using sectorial structure