All-digital flexible uplink remote radio head for C-RAN

The Centralized-Radio Access Networks (C-RAN) are one of the current trends for the next generation mobile standards. The main concept of C-RAN is the separation of the baseband processing and management tasks from the radio access units. This paper presents an all-digital, simple and flexible RF uplink section for a C-RAN Remote Radio Head (RRH). The implemented system presents an analog input bandwidth of about 3GHz, being capable to receive any signal up to 5MHz symbol rate while maintaining the current LTE Error Vector Magnitude (EVM) requirements.