Apparatus and method for time synchronization of repeater

A method for time synchronization of a repeater, the method comprising:

• when one of a downlink signal and an uplink signal is inputted, at a delay processor, deriving a delay code indicating a time delay of the input signal by measuring the time delay of the input signal;
• at the delay processor, generating a compensation control code based on the delay code;
• at the delay processor, compensating for the time delay of the signal by using the compensation control code, the compensating for the time delay of the signal including:
• delaying, by a delay buffer of the delay processor, an input signal in accordance with an initialization control code and outputting the delayed signal,
• generating, by a delay measurer of the delay processor, a delay code indicating a time delay of the input signal by comparing an output of each delay cell with a system clock,
• generating, by a control code generator of the delay processor, a compensation control code for compensating for the time delay of the signal in accordance with the delay code, and
• inputting, by a control code processor of the delay processor, the generated compensation control code to the delay buffer so that the time delay of the signal is compensated by the delay buffer in accordance with the compensation control code;
• and
• at a synchronization controller, controlling switching of a switch selectively establishing a downlink path or an uplink path in synchronization with the time delay of the compensated signal so that an uplink interval and a downlink interval do not overlap.