| 摘要 |
PROBLEM TO BE SOLVED: To detect a fault of a receiver autonomously, without reducing the number of users capable of talking during a service state with the constitution of absolute minimum limit, without requiring a testing unit in a receiving section of a radio base station system. SOLUTION: A coupler 101 inputs a transmission signal S100 and one outputs one to an antenna 100, while the other a transmission monitor signal S102 is output. An SW 102 inputs the monitor signal S102 and a switching signal S104 for switching the SW, and conducts the SW by this switching signal. A coupler 105 inputs a transmission monitor signals S103 and a reception signal S105, and outputs to the receiving section 108. A fault detector 149 of a baseband unit 109 conducts fault determination the section 108. A demodulation processing unit 150 inputs a receiving baseband signal, and demodulates. A switch controller 151 outputs the switching signal S104 for executing the fault detection at a predetermined time. |
