| 摘要 |
PROBLEM TO BE SOLVED: To implement communication of a TDD system without being restricted by a communicable area and with high time utilization efficiency.SOLUTION: A frame synchronization detection unit 12 detects a frame head. A frame length/processing delay detection unit 19 detects a reception frame length from a PHY header, and detects delay time in a transmission system. A transmission timing calculation unit 21 calculates transmission timing adjustment time by using a predetermined formula (1). A transmission timing control unit 22 outputs a transmission timing signal when the transmission timing adjustment time has passed after a time point of the frame head, and outputs a switching timing signal when the delay time in the transmission system has passed after a time point of the transmission timing signal. An encoding unit 24 and the like in the transmission system start processing at the time point of the transmission timing signal. At a time point of the switching timing signal, a transmission high-frequency unit 42 turns on a power supply and a transmission/reception switching unit 40 switches to a transmission antenna. Thereby, a signal can be transmitted immediately after completion of receiving the signal. |
