| 摘要 |
PURPOSE:To provide the transmission/reception circuit which adjusts the transmission processing start time to an optimum timing in the communication system where a base station transmits a time as the reference to a terminal and the terminal performs time management based on the received time. CONSTITUTION:Transmission data processing means 9, 12, and 13 which perform the transmission data processing and can adjust the transmission processing start time, a modulating means 11 which modulates transmission data sent from these means and converts the frequency, a switch means which is switched by the signal from a control part 13, a demodulating means 3 which converts the frequency of the reception signal inputted from an antenna 1 or the modulating means to demodulate it, and delay time detecting means 5, 12, and 13 which detect the delay time for frequency conversion and demodulation of the reception signal from the modulating means are provided, and a time adjusting means 13 is provided which uses the delay time detected by delay time detecting means to adjust the transmission processing start time of transmission data processing means. |
