Repeater and method of operation thereof

1. A synchronization detection method of a repeater, the method comprising:

receiving a communication signal comprising a plurality of synchronization signal blocks respectively belonging to different frequency ranges;

determining a priority of a frequency range in which the plurality of synchronization signal blocks are to be detected based on signal level for each frequency range;

detecting a synchronization signal block existing at arbitrary positions within each frequency range according to the determined priority; and

when the synchronization signal block is detected in a first frequency range, detecting synchronization based on the detected synchronization signal block without performing detection of the synchronization signal block in a second frequency range having a lower priority than the first frequency range.

2. The method of claim 1 , wherein each of the plurality of synchronization signal blocks comprises:

a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH).

3. The method of claim 2 , wherein the detecting synchronization using the detected synchronization signal block includes:

detecting synchronization using a correlation between the PSS and the SSS included in the detected synchronization signal block.

4. The method of claim 3 , further comprising:

generating a switching signal for switching uplink communication and downlink communication in the repeater using the detected synchronization.

5. The method of claim 1 , wherein the determining of the priority of the frequency range in which the plurality of synchronization signal blocks are to be detected comprising:

transforming the communication signal into a frequency domain and detecting signal level for each frequency range of the communication signal transformed into the frequency domain.

6. The method of claim 1 , wherein the determining of the priority of the frequency range in which the plurality of synchronization signal blocks are to be detected comprising:

determining a frequency range having large signal level as a high priority based on the signal level for each frequency range.

7. A repeater comprising:

a domain transform circuit configured to receive a communication signal comprising a plurality of synchronization signal blocks respectively belonging to different frequency ranges and to transform the received communication signal into a frequency domain;

a power detector configured to measure signal level for each frequency range of the communication signal transformed into the frequency domain; and

a synchronization detector configured to determine a priority of a frequency range in which the plurality of synchronization signal blocks are to be detected based on the measured signal level for each frequency range, and to detect a synchronization signal block existing at arbitrary positions within each frequency range according to the determined priority, and

wherein the synchronization detector is configured to, when the synchronization signal block is detected in a first frequency range, detect synchronization based on the detected synchronization signal block without performing detection of the synchronization signal block in a second frequency range having a lower priority than the first frequency range.

8. The repeater of claim 7 , further comprising:

a plurality of uplink/downlink switches, each for switching uplink communication and downlink communication.

9. The repeater of claim 8 , further comprising:

a switching signal generator configured to generate a switching signal for switching the plurality of uplink/downlink switches using the detected synchronization.

10. The repeater of claim 9 , wherein the synchronization signal block comprising:

a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH).