RRU3004

The RRU3004 is an outdoor remote RF unit.

The functions of the RRU3004 are as follows:

The direct IQ modulation technique, which is directly implemented in the transmit channel, modulates the baseband signals into GSM RF signals. After being filtered and amplified, the RF signals are transmitted to the antenna for transmission, through the duplexer in the RF front-enda unit.

The uplink RF signals received from the antenna go through down-conversion, amplification, analog-to-digital conversion, matched filtering, Automatic Gain Control (AGC), and then are sent to ASIC and DSP for demodulation and decoding.

Power regulation and Voltage Standing Wave Ration (VSWR) detection.

Frequency systemization and loopback test.

Generation and recovery of the clock circuitry at the CPRI interface, and the alarm detection.