Method of generating reference signal in wireless communication system

1. A method for transmitting a reference signal in a wireless communication system, the method comprising:

mapping a reference signal sequence r(n), defined by a base sequence x u (n) and having a length N, to N subcarriers; and

transmitting the mapped reference signal sequences r(n) on an uplink channel,

wherein the base sequence x u (n) is expressed by

x u ( n )= e jp(n)π/4 , and

if N=12, at least one of the sets of values provided in the below table is used as a set of values for the phase parameter p(n):

p(0), . . . , p(11)

−1

3

−1

1

1

−3

−3

−1

−3

−3

3

−1 

−1

3

1

3

1

−1

−1

3

−3

−1

−3

−1 

−1

−3

1

1

1

1

3

1

−1

1

−3

−1 

−1

3

−3

3

−1

3

3

−3

3

3

−1

−1.

2. The method of claim 1 , wherein, if N=24, at least one of the sets of values provided in the below table is used as a set of values for the phase parameter p(n):

p(0), . . . , p(23)

−1

−3

3

−1

−1

−1

−1

1

1

−3

3

1

3

3

1

−1

1

−3

1

−3

1

1

−3

−1 

−1

−3

3

−3

−3

−3

−1

−1

−3

−1

−3

3

1

3

−3

−1

3

−1

1

−1

3

−3

1

−1 

−1

−1

1

−3

1

3

−3

1

−1

−3

−1

3

1

3

1

−1

−3

−3

−1

−1

−3

−3

−3

−1 

−1

−3

1

1

3

−3

1

1

−3

−1

−1

1

3

1

3

1

−1

3

1

1

−3

−1

−3

−1 

−1

−3

−1

−1

1

−3

−1

−1

1

−1

−3

1

1

−3

1

−3

−3

3

1

1

−1

3

−1

−1.

3. The method of claim 1 , wherein the reference signal sequence r(n) is defined by the base sequence x u (n) as follows:

r ( n )= e jαn x u ( n )

by a cyclic shift a of the base sequence x u (n).

4. The method of claim 1 , wherein the uplink channel is a physical uplink control channel (PUCCH).

5. The method of claim 1 , wherein the uplink channel is a physical uplink shared channel (PUSCH).

6. The method of claim 1 , wherein the reference signal sequence r(n) is a demodulation reference signal used for demodulating uplink data.

7. The method of claim 1 , wherein the reference signal sequence r(n) is a sounding reference signal used for user scheduling.

8. A mobile communication terminal configured to transmit a reference signal in a wireless communication system, comprising:

an antenna;

a communications module operatively connected to the antenna; and

a processor operatively connected to the communications module, the processor configured to

map a reference signal sequence r(n), defined by a base sequence x u (n) and having a length N, to N subcarriers; and

transmit the mapped reference signal sequence r(n) on an uplink channel,

wherein the base sequence x u (n) is expressed by

x u ( n )= e jp(n)π/4 , and

if N= 12 , at least one of the sets of values provided in the below table is used as a set of values for the phase parameter p(n):

p(0), . . . , p(11)

−1

3

−1

1

1

−3

−3

−1

−3

−3

3

−1 

−1

3

1

3

1

−1

−1

3

−3

−1

−3

−1 

−1

−3

1

1

1

1

3

1

−1

1

−3

−1 

−1

3

−3

3

−1

3

3

−3

3

3

−1

−1.

9. The mobile communication terminal of claim 8 , wherein, if N=24, at least one of the sets of values provided in the below table is used as a set of values for the phase parameter p(n):

p(0), . . . , p(23)

−1

−3

3

−1

−1

−1

−1

1

1

−3

3

1

3

3

1

−1

1

−3

1

−3

1

1

−3

−1 

−1

−3

3

−3

−3

−3

−1

−1

−3

−1

−3

3

1

3

−3

−1

3

−1

1

−1

3

−3

1

−1 

−1

−1

1

−3

1

3

−3

1

−1

−3

−1

3

1

3

1

−1

−3

−3

−1

−1

−3

−3

−3

−1 

−1

−3

1

1

3

−3

1

1

−3

−1

−1

1

3

1

3

1

−1

3

1

1

−3

−1

−3

−1 

−1

−3

−1

−1

1

−3

−1

−1

1

−1

−3

1

1

−3

1

−3

−3

3

1

1

−1

3

−1

−1.

10. The mobile communication terminal of claim 8 , wherein the reference signal sequence r(n) is defined by the base sequence x u (n) as follows

r ( n )= e jαn x u ( n )

via a cyclic shift a of the base sequence x u (n).

11. The mobile communication terminal of claim 8 , wherein the uplink channel is a physical uplink control channel (PUCCH).

12. The mobile communication terminal of claim 8 , wherein the uplink channel is a physical uplink shared channel (PUSCH).

13. The mobile communication terminal of claim 8 , wherein the reference signal sequence r(n) is a demodulation reference signal used for demodulating uplink data.

14. The mobile communication terminal of claim 8 , wherein the reference signal sequence r(n) is a sounding reference signal used for user scheduling.