| 摘要 |
PURPOSE:To detect a unique word stably receiving a slave station burst signal in a reference station, deciding a code error on a transmission line, sending it to a slave station as a reference station burst while using it as a command, extracting a code error rate at the slave station so as to control a threshold level of the unique word detection. CONSTITUTION:A reference station burst reception circuit 2 receives a command included in a reference station burst. The command is subject to code error correction further and outputted as a re command (d). A slave station burst reception circuit 5 receives a data included in the slave station burst. After the code error is corrected, the result is outputted as a reception, data (e). A code error rate extraction circuit 3 extracts the code error rate included in the reception command (d) from the reference station and then a threshold level control circuit 4 gives a control signal of the threshold level of unique word detection so that the threshold level of unique word detection set in the unique word detection circuit 1 is an optimum value or its vicinity with respect to the increase/decrease in the code error caused on the transmission line. |
