To provide a CDMA base station receiver that replaces a wrong base band signal output with a signal generated by a relay section, when the wrong base band signal is generated due to the fault of a reception section so as to prevent processing by wrong data.
The receiver consists of a reception section 10, a relay section 20 and a base band processing section 30. The base band signal, generated by the reception section 10, is fed to a selector section 22 via an input data conversion section 21 of the relay section 20. When receiving a wrong base band signal, the selector section 22 selects and outputs consecutive '0s' data generated by the relay section 20. The base band processing section 30 takes a correlation value between the received data and a normal base band signal, to detect the fault in the base band signal.