| 摘要 |
<p>DIGITAL RADIO COMMUNICATION SYSTEM A digital radio communication system in the form of a multi-direction time division multiplex network including; a central station having one working transmitter and receiver and one standby transmitter and receiver, both working and standby transmitter and receiver having a radio line terminating equipment, each transmitter and receiver having a first phase shifting circuit for adjusting a phase of a transmission signal and a second phase shifting circuit for adjusting a phase of a sampling clock signal, whereby a signal propagation delay time of the working transmitter and receiver is previously adjusted by the first phase shifting circuit so as to become equal to that of the standby transmitter and receiver, then, the phase of a sampling clock signal is previously adjusted between both second phase shifting circuits so as to be at a central position of bit width of a reception signal, and a plurality of substations, each operatively connected to the central station by time-divided digital radio signal, and each at least having a clock phase shifting circuit for adjusting a phase of a transmission signal transmitted from itself.</p> |
