| 摘要 |
<p>PURPOSE:To improve the frequency utilizing efficiency by allowing a master set starting communication with a desired slave set among plural master sets to detect a signal pattern of the master set having already made communication so as to establish the synchronization with the master set thereby eliminating a time not available for the communication. CONSTITUTION:When a master set 100 starts communication, a radio section 11 receives control use burst data communicated between other master set and slave set. The burst data are fed to a MODEM 12, in which the data are converted into a digital signal and it is inputted to a synchronization control section 16 and a unique word detection circuit 17 detects a unique word. Then a synchronization generating circuit 18 establishes the synchronization between the master set 100 and other master set based on a detection timing of the unique word in the unique word detection circuit 17. Furthermore, the synchronization generating circuit 18 detects a reception level from the radio section 11 to detect an idle area through which other master set makes no communication thereby deciding a slot used for the communication.</p> |
