User's Manual

User Manual
SmartCell Repeater
10
2.2.2 Downlink/ Uplink Path
The user may select frequency bands according to the site conditions. After receiving a signal
from the donor antenna(s), the repeater improves it and sends a securely isolated signal out to
the service antenna(s). Each amplifier module has its own separate digital filter module (DFM).
The amplifier module consists of a down converter, up converters, cavity filter, and power
amplifier (PAU).
In the Downlink Path:
1. RF Signal is received from the donor antenna through the input port.
2. The signal is then converted from RF to IF,
3. The IF signal is digitized by the DA converter,
4. The digital signal is filtered by the DFM (FPGA),
5. The modulator converts the digital signal to an analog RF signal and transmits to
the amplifier.
6. Amplifier outputs final signal to service antennas at desired output power.
Uplink path works in reverse order.
<Figure 5> SmartCell Repeater Block Diagram
DFM