Universal Baseband Processing Board for GSM (UBPG/UBPG3)

Functions

The UBPG and UBPG3 boards are GSM baseband processing boards, processing physical layer protocols and frame protocols defined by 3GPP. The UBPG supports 12 TRXs while the UBPG3 supports 24 TRXs. They provide the following functions:
 

• Implement rate adaptation, channel coding, interleaving, and encryption, generates TDMA burst pulses, performs GMSK/8PSK modulation, and outputs IQ baseband digital signals.
• Receive IQ data on uplink, combines receiver diversities, performs digital demodulation (GMSK and 8PSK demodulation, and balancing), decryption, de-interleaving, channel decoding, and rate adaptation, and sends the signals to the CC board through the GE Ethernet interface.
• Perform radio channel synchronization, and processes transmission frames.
• Measure the parameters of power control and handover.
• Communicate with the CC board through the Ethernet interface.
• Read various hardware management identifications, including back-end type, slot number, board function type, board version, board function configuration ID, and CPU serial number.