System Planning 78
Figure 52:
Minimum CN spacing
Near-far radio
Near-far ratio for links from different sectors on the same pole is based on the following factors:
l Scenario:
l One wireless link on DN sector 1 at long range, link 2
l One wireless link on DN sector 2 at short range, link 1
l Narrow angular separation between link1 and link2 (less than 20 degrees)
l Configured for the same channel
l Problem:
l The TG system utilizes the active Transmit Power control.
l The transmit powers for link 1 is automatically set to a low level.
l The transmit powers for link 2 is automatically set to a high level.
l Due to narrow angular separation, the sidelobes of link 2 is interfered with link 1. As a result,
the Signal-to-Noise Ratio (SNR) of link1 could degrade and this might cause the transmit
power of link 1 to be boosted to a much higher level. This problem ends up in a cycle
resulting in both links eventually transmitting at full power by causing network interference.
l Solution:
To Next Page
Loading...
