Method and device for generating synchronization signal in wireless access system supporting ultrahigh frequency band

1. A method for transmitting a synchronization signal to correct a Carrier Frequency Offset (CFO) by a Base Station (BS) in a wireless access system supporting a high frequency band, the method comprising:

generating a first repetitive synchronization signal having a first repetitive characteristic;

generating a second repetitive synchronization signal having a second repetitive characteristic; and

transmitting the first and second repetitive synchronization signals in the same subframe,

wherein the first and second repetitive synchronization signals are transmitted in adjacent Orthogonal Frequency Division Multiplexing (OFDM) symbols of the subframe.

2. The method according to claim 1 , wherein the first repetitive synchronization signal is generated by inserting zero bits according to the first repetitive characteristic and the second repetitive synchronization signal is generated by inserting zero bits according to the second repetitive characteristic.

3. The method according to claim 1 , further comprising transmitting a message including a first repetition factor indicating the first repetitive characteristic and a second repetition factor indicating the second repetitive characteristic.

4. The method according to claim 3 , wherein the message further includes information about the position of the subframe carrying the first and second repetitive synchronization signals.

5. A Base Station (BS) for transmitting a synchronization signal to correct a Carrier Frequency Offset (CFO) in a wireless access system supporting a high frequency band, the BS comprising:

a transmitter; and

a processor configured to generate a repetitive synchronization signal,

wherein the processor is configured to generate a first repetitive synchronization signal having a first repetitive characteristic, generate a second repetitive synchronization signal having a second repetitive characteristic, and control the transmitter to transmit the first and second repetitive synchronization signals in the same subframe,

wherein the first and second repetitive synchronization signals are transmitted in adjacent Orthogonal Frequency Division Multiplexing (OFDM) symbols of the subframe.

6. The BS according to claim 5 , wherein the first repetitive synchronization signal is generated by inserting zero bits according to the first repetitive characteristic and the second repetitive synchronization signal is generated by inserting zero bits according to the second repetitive characteristic.

7. The BS according to claim 5 , wherein the processor controls the transmitter to transmit a message including a first repetition factor indicating the first repetitive characteristic and a second repetition factor indicating the second repetitive characteristic.

8. The BS according to claim 7 , wherein the message further includes information about the position of the subframe carrying the first and second repetitive synchronization signals.

9. A method for receiving a synchronization signal to correct a Carrier Frequency Offset (CFO) by a user equipment (UE) in a wireless access system supporting a high frequency band, the method comprising:

receiving a first repetitive synchronization signal having a first repetitive characteristic; and

receiving a second repetitive synchronization signal having a second repetitive characteristic;

wherein the first and second repetitive synchronization signals are received in the same subframe, and

wherein the first and second repetitive synchronization signals are transmitted in adjacent Orthogonal Frequency Division Multiplexing (OFDM) symbols of the subframe.

10. The method according to claim 9 , wherein the first repetitive synchronization signal is generated by inserting zero bits according to the first repetitive characteristic and the second repetitive synchronization signal is generated by inserting zero bits according to the second repetitive characteristic.

11. The method according to claim 9 , further comprising receiving a message including a first repetition factor indicating the first repetitive characteristic and a second repetition factor indicating the second repetitive characteristic.

12. The method according to claim 11 , wherein the message further includes information about the position of the subframe carrying the first and second repetitive synchronization signals.

13. A user equipment (UE) for receiving a synchronization signal to correct a Carrier Frequency Offset (CFO) by a Base Station (BS) in a wireless access system supporting a high frequency band, the UE comprising:

a receiver; and

a processor configured to correct the CFO in the high frequency band,

wherein the processor controls the receiver in order to:

receive a first repetitive synchronization signal having a first repetitive characteristic; and

receive a second repetitive synchronization signal having a second repetitive characteristic;

wherein the first and second repetitive synchronization signals are received in the same subframe, and

wherein the first and second repetitive synchronization signals are transmitted in adjacent Orthogonal Frequency Division Multiplexing (OFDM) symbols of the subframe.

14. The UE according to claim 13 , wherein the first repetitive synchronization signal is generated by inserting zero bits according to the first repetitive characteristic and the second repetitive synchronization signal is generated by inserting zero bits according to the second repetitive characteristic.

15. The UE according to claim 13 , wherein the processor is further configured to receive a message including a first repetition factor indicating the first repetitive characteristic and a second repetition factor indicating the second repetitive characteristic.

16. The UE according to claim 15 , wherein the message further includes information about the position of the subframe carrying the first and second repetitive synchronization signals.