| 摘要 |
PURPOSE:To reduce the load on a transmitting base station side, by retrieving in parallel common call numbers against all frames and individual call numbers against its own frames in a call number coincidence detecting circuit in a decoder. CONSTITUTION:When a 17-word counter 109 is reset by SC signal detecting pulses (a), the counter 109 successively outputs a control signal (b) which actuates a common call number detecting circuit 111 and signals PG1-PG8 corresponding to frames, to which data read at the moment belong. At a frame selecting circuit 110 its own group number is read from a P-RPM 5 and the one corresponding to its own group is selected out of the output signals PG1-PG8 from the 17-word counter 109, and then, the selected signal is outputted to an individual call number detecting circuit 112 as a timing controlling signal (c). Therefore, the common call number detecting circuit 111 and individual call number detecting circuit 112 retrieve a common and individual call numbers in parallel.
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