Patent ID: 11923905
Assignee: COMBA NETWORK SYSTEMS COMPANY LIMITED
Field: Telecommunications (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 1:
2. The distributed antenna system according to claim 1, wherein: each of the at least two digital-analog expansion units comprises a first optical transceiver module, the first baseband processing module, the first signal conversion module and the radio frequency front end module successively connected;
the first optical transceiver module is configured to perform optical signal interaction with the source unit;
the first baseband processing module is configured to perform a baseband processing operation on a received signal and then output the signal;
the first signal conversion module is configured to perform digital radio frequency signal interaction with the baseband processing module and perform analog radio frequency signal interaction with the radio frequency front end module; and
the radio frequency front end module is configured to perform analog radio frequency signal interaction with the remote unit and configured to perform analog radio frequency signal processing.