User's Manual Part 1

1-11
Transmit/Forward/Downlink (BTS to Phone)
The incoming RF signal into the Main Hub is split into several fiber optic
transceivers that convert the RF signal to an optical signal. The Main Hub transmits
the converted signal over the fiber to the Expansion Hub. The Expansion Hub
converts the optical signal to an RF signal and transmits the RF signals to the RAUs.
The RAUs then transmit the RF signals to the antenna and then to wireless phones.
Receive/Reverse/Uplink (Phone to BTS)
The RAUs transmit RF signals from wireless phones back through the antenna and
to the Expansion Hubs. The Expansion Hubs transmit the RF signals back to the
Main Hub in optical form. The Main hub converts the optical signals back to
electrical signals and sends them to an MBS, a repeater, or a roof-mounted antenna.
For a detailed description of system operation, see
Section 2, LGCell Equipment
.
LGC
ell
Advantages
The LGC
ell
solution is based on a fundamentally new approach that has cost and
engineering advantages not found in competitive systems.
Competitive systems offer similar capabilities but require sophisticated RF
engineering and take a long time to install. They typically use specialty cables that
require expensive, difficult, time-consuming, and potentially disruptive
installations.
LGC
ell
’s plug-and-play design requires minimal RF engineering and planning. Its
unique double-star architecture keeps service and maintenance to a minimum,
unlike cascaded antenna systems. The flexible architecture permits deployment in
the most difficult RF environments.
LGC
ell
’s low cost and simple installation effectively provide both coverage and
capacity enhancements to meet the demands of the growing wireless network.