Cellular System

1
Cellular System

• Cellular concept
• Propagation models

2
Introduction to Mobile SystemsCellular System
Concept
3
The factor N is called the cluster size and is
given Ni2ijj2
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
i1, j2 , N1247
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 N7 using sectorial structure