| 摘要 |
PROBLEM TO BE SOLVED: To continue repeater transmission without any trouble by excluding influences such as the static, interference waves and radio interference waves of high field strength by deciding whether the time slot of a signal is not used or just under using from using state information received from a high-order station. SOLUTION: A repeater control update signal detection part 11 extracts repeater control information contained in a TDM signal, which is received by a directional antenna 14, from the high-order station to a low-order station and outputs a repeater control update signal (e). This repeater control update signal (e) is changed according to the using state of each time slot of the TDMA signal. A reception part 2 extracts the received field strength information from the level of the signal received from the low-order station to a non-directional antenna 15. A threshold part 9 compares the received field strength information with a reference level and outputs a burst exist signal (f). A transmission command signal (k) is outputted from a receiving state storage part 10 according to the control of the repeater control update signal (e). The signal from a reproducing part 3 is transmitted from the directional antenna 14 to the high-order station by a transmission part 4. |
