Product Description

Applications
DN991444 © Nokia Corporation Draft 33 (98)
Issue 3-0 en Draft Nokia Proprietary and Confidential
TRXs from different sectors can be connected to one antenna. The following
examples assume that the MetroSite antenna is used; the diversity applications
may differ from the ones presented here if different antenna types are used.
Figure 7 presents a single band (GSM/EDGE 900) BTS which has four TRXs in
one sector. The antennas are directed to the same direction; the resulting coverage
area comprises four TRXs. In order to employ diversity, it is most feasible to
connect the TRXs which share the diversity to different antennas.
Figure 7. Four TRXs in one sector, single band configuration
With dual band antennas, such as the MetroSite antenna, overlapping
GSM/EDGE 900 and GSM/EDGE 1800 coverage areas can be created by
connecting TRXs from a GSM/EDGE 900 sector and TRXs from a GSM/EDGE
1800 sector to one antenna.
Antennas directed to form one coverage area
including 4 GSM/EDGE 900 TRXs.
DIV
OUT
DIV
IN
DIV
IN
DIV
OUT
DIV
OUT
DIV
OUT
DIV
IN
DIV
IN
T
R
X
4
T
R
X
3
T
R
X
2
T
R
X
1
- 4 TRXs
- 1 sector
- Single band
- Diversity
BTS configuration
BTS
Coverage pattern
(principle)
GSM/EDGE 900 =
GSM/EDGE 1800 =
Dual band =