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

Claim 5:
6. The distributed antenna system according to claim 2, wherein each of the at least two digital-analog expansion units further includes a first monitoring circuit, a power supply circuit and a first coupler that is connected to the first remote unit of the respective remote cascade chain by means of radio frequency cable;
the first coupler is connected to the first baseband processing module, the radio frequency front end module, the first monitoring circuit and the power supply circuit; and
the first coupler is configured to perform at least one of operations including: coupling uplink and downlink switching signals generated by the first baseband processing module to the radio frequency cable, coupling a power signal to the radio frequency cable, performing monitoring signal interaction with the remote unit, and performing analog radio frequency signal interaction with the remote unit.