| 摘要 |
PURPOSE:To avoid production of a waste time even when communication requests from mobile stations collide with each other. CONSTITUTION:Communication requests whose frequencies are f1-fn are allocated to each of mobile stations and the communication request signals are extracted by filters 6a-6n respectively and sent to a communication controller 1 via waveform shaping devices 7a-7n. The communication controller receiving a communication request signal identifies which mobile station M makes the communication request and sends a communication enable signal to the mobile station M via a data modulation circuit 2. The mobile station M sends data by a carrier frequency fc and the data signal is sent to the communication controller 1 via a filter 5 and a data demodulation circuit 3. |
