Performing measurements on the common public radio interface

摘要

As in many other areas, digital interfaces are also being used increasingly in wireless communications. Instead of using analog I/Q signals, the baseband and RF modules of base stations communicate by means of digital baseband signals. Wireless communications network operators, in particular, are demanding the possibility of combining base station modules from different manufacturers to avoid being completely dependent on one supplier. The interfaces must therefore be standardized. The common public radio interface (CPRI) standard is an attempt at creating a standardized platform for digital communications between baseband and RF. It defines the interface between the baseband unit of a base station (the REC, radio equipment control) and the RF unit (the RE, radio equipment).