Vanu Anywave Base Station System, Operator'S Manual, Page: 14 / 27

Vanu Anywave BSS Operator Guide — DRAFT
Figure 2.3: Protium RF Front End Block Diagram
The figure above is a block diagram of the internal components that constitute the Protium RF Front
End used by the Anywave System.
When the BTS receives a signal from a mobile, an example path that data would follow would be: the
RF signal is received through the Main Antenna port (labeled “TO ANT”) which is connected to the
duplexer, which is used to separate the transmit and receive sides of the RF data. From there, the signal
is sent via RF cable to the main downconverter, which converts the signal to a lower intermediate
frequency (IF). That IF signal is then transferred (internally) to the digital downconverter which both
digitizes it and downconverts it again to a baseband signal. This digital baseband data is then sent out
over the Gigabit Ethernet Interface to the host (server).
For transmission, the BTS will generate and send digitized data over the Gigabit Interface to the RF
Front End, which then upconverts the data to an analog signal RF for amplification and broadcast from
the antenna to the mobile station.
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