Method of generating reference signal in wireless communication system

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

generating a plurality of reference signal sequences by cyclically shifting a base sequence x u (n);

mapping each of the plurality of reference signal sequences to a corresponding single carrier frequency division multiple access (SC-FDMA) symbol among a plurality of SC-FDMA symbols in a subframe to form the reference signal, the subframe including the plurality of SC-FDMA symbols in a time domain and two resource blocks in a frequency domain, the resource block including 12 subcarriers; and

transmitting the reference signal,

wherein the base sequence x u (n) is expressed by x u (n)=e jp(n)π/4 , and

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

−1

−3

3

−3

−3

−3

−1

−1

−3

−1

−3

3

−1

−1

1

−3

1

3

−3

1

−1

−3

−1

3

−1

−3

1

1

3

−3

1

1

−3

−1

−1

1

−1

−3

−1

−1

1

−3

−1

−1

1

−1

−3

1

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

3

3

1

−1

1

−3

1

−3

1

1

−3

−1

1

3

−3

−1

3

−1

1

−1

3

−3

1

−1

1

3

1

−1

−3

−3

−1

−1

−3

−3

−3

−1

3

1

3

1

−1

3

1

1

−3

−1

−3

−1

1

−3

1

−3

−3

3

1

1

−1

3

−1

−1.

2. The method of claim 1 , wherein the reference signal is a demodulation reference signal for a physical uplink shared channel (PUSCH).

3. The method of claim 1 , wherein the reference signal is a reference signal for a physical uplink control channel (PUCCH).

4. The method of claim 1 , wherein the reference signal is a reference signal for a physical uplink shared channel (PUSCH).

5. The method of claim 1 , wherein the reference signal is a sounding reference signal (SRS).

6. The method of claim 1 , further comprising mapping the reference signal to corresponding resource elements.

7. A user equipment configured to transmit a reference signal in a wireless communication system, the user equipment comprising:

an antenna;

a communications module operatively connected to the antenna; and

a processor operatively connected to the communications module, and configured for:

generating a plurality of reference signal sequences by cyclically shifting a base sequence x u (n);

mapping each of the plurality of reference signal sequences to a corresponding single carrier frequency division multiple access (SC-FDMA) symbol among a plurality of SC-FDMA symbols in a subframe to form the reference signal, the subframe including the plurality of SC-FDMA symbols in a time domain and two resource blocks in a frequency domain, the resource block including 12 subcarriers; and

transmitting the reference signal,

wherein the base sequence x u (n) is expressed by x u (n)=e jp(n)π/4 , and

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.

8. The user equipment of claim 7 , wherein the reference signal is a demodulation reference signal for a physical uplink shared channel (PUSCH).

9. The user equipment of claim 7 , wherein the reference signal is a reference signal for a physical uplink control channel (PUCCH).

10. The user equipment of claim 7 , wherein the reference signal is a reference signal for a physical uplink shared channel (PUSCH).

11. The user equipment of claim 7 , wherein the reference signal is a sounding reference signal (SRS).

12. The user equipment of claim 7 , wherein the processor is further configured to map the reference signal to corresponding resource elements.