User's Manual

Ultra Wideband Perimeter Surveillance Pole / User’s Manual 5
The number of poles deployed at a given site depends on the length of the perimeter that
requires monitoring. The poles are organized into groups of six poles referrred to as
networking cells. As shown in Figure 3 the physical footprint of a networking cell is a
rectangle that is 100 meters long by 20 meters wide (note the radar coverage area extends up
to 20 meters beyond the cells footprint in all directions).
100 meters
20 meters
20 meter grid
Pole location
Figure 3: Footprint of six pole networking cell
As described in Section 1.2.2 a key feature of the networking cell concept is that only a
single UWB radar (P400) within each cell is transmitting at any given time while the other
radars within the same networking cell attempt to receive that transmission thus making very
efficient use of the transmitted energy (air time). This has the benefit of reducing emissions
from the overall system (1 transmitter within the space of a football field) thus reducing (and
pratically speaking, eliminating) the system’s interference potential.