2. In the second case,
the OFDM-PHY technology could be used to extend service from the BS to the building
or directly to its tenants that are directly reachable from the BS, though not necessarily
in line-of-sight of the BS. In the third case, the WiMAX Mesh technology could be
used to extend the service from the BS to the building or tenants that are reachable
from the Mesh network. Regardless of which method is employed, the wireless network
can be used to extend the services offered on the fiber-optics network, such as Carrier
Ethernet services, to the users of the wireless network.
Even though any of the PHY standards could be used, SC-PHY technology is usually
more desirable for this type of application. Extensions of fiber services demand high
bandwidth from the network. The SC solution can offer higher bandwidth per channel
than the OFDM solution (96 Mbps vs. 75 Mbps with 20 MHz band) can a large
pool of suitable spectrum in the 10??“66 GHz region is already available for this type
of applications, both on a license-exempt basis or for low-cost licensing fees. Because
of their propagation properties, which do not allow efficient NLOS operation or long
range operations, these spectrums are not sought after as much as the lower frequency
spectrums are.
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