| 摘要 |
PURPOSE:To dispense with a radio line for a signal for phase compensation and to perform the phase compensation by providing a phase comparison part which outputs a setting signal to set delay time based on the reciprocating time of a wire circuit and the delay time of a first delay part to a second delay part. CONSTITUTION:An automatic inter-station phase compensating system is comprised of a central radio base station 10 and plural peripheral radio base stations 30 connected to the central radio base station 10 via a wire line 20. A delay circuit 14, when data (a) being inputted, supplies a delay quantity based on the setting signal (d) from a phase comparison circuit 16 to the data (a). And delayed data (b) is generated, and is transmitted to the down line 21 of the wire line 20. The phase comparison circuit 18 measures the phase of the data (b) before being inputted to a modulation/demodulation circuit 15 and data (c) after being folded from the peripheral radio base station 30 and passing the modulation/demodulation circuit 15, and sets the delay quantity of the delay circuit 14 at {(delay quantity of delay circuit 12)-(measured result of phase comparison circuit 16)}divided by 2. The phase compensation of the data can be performed by such delay. |
