| CPC H04W 56/005 (2013.01) [H04B 7/15507 (2013.01); H04W 56/002 (2013.01); H04W 72/0446 (2013.01)] | 10 Claims |
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1. An apparatus for time synchronization of a repeater, the apparatus comprising:
a downlink receiver and a downlink transmitter establishing a downlink path for delivering a downlink signal;
an uplink receiver and an uplink transmitter establishing an uplink path for delivering an uplink signal;
a switch including an upper switch and a lower switch and performing switching such that the downlink path is established in a downlink interval and the uplink path is established in an uplink interval;
a delay processor compensating for a time delay of one of the downlink signal and the uplink signal, the delay processor including:
a delay buffer delaying an input signal in accordance with an initialization control code and outputting the delayed signal,
a delay measurer generating a delay code indicating a time delay of the input signal by comparing an output of each delay cell with a system clock,
a control code generator generating a compensation control code for compensating for the time delay of the signal in accordance with the delay code, and
a control code processor inputting 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
a synchronization controller controlling the switching of the switch in synchronization with the time delay of the compensated signal so that the uplink interval and the downlink interval do not overlap.
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