Method of generating reference signal in wireless communication system
View Patent ↗A method of generating a reference signal includes acquiring a base sequence and acquiring a reference signal sequence with a length N from the base sequence. Good PAPR/CM characteristics of the reference signal can be kept to enhance performance of data demodulation or uplink scheduling.
1. A method for transmitting a reference signal in a wireless communication system, the method comprising:
generating a reference signal sequence r(n) corresponding to a base sequence x u (n) via a cyclic shift α of the base sequence x u (n) as follows:
r(n)=e jαn x u (n), where α is the cyclic shift value; and
transmitting the reference signal r(n) generated based on the base sequence x u (n) on an uplink channel,
wherein the base sequence x u (n) is expressed by
x u (n)=e jp(n)π/4 , where p(n) is a phase parameter, and
if a length of the base sequence x u (n) is 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,
or
if a length of the base sequence x u (n) is 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.
2. The method of claim 1 , wherein the uplink channel is a physical uplink control channel (PUCCH).
3. The method of claim 1 , wherein the uplink channel is a physical uplink shared channel (PUSCH).
4. The method of claim 1 , wherein the reference signal sequence r(n) is a demodulation reference signal used for demodulating uplink data.
5. The method of claim 1 , wherein the reference signal sequence r(n) is a sounding reference signal used for user scheduling.
6. A mobile communication terminal configured to transmit a reference signal in a wireless communication system, the mobile communication terminal comprising:
an antenna;
a communications module operatively connected to the antenna; and
a processor operatively connected to the communications module, and configured to generate a reference signal sequence r(n) corresponding to a base sequence x u (n) via a cyclic shift a of the base sequence x u (n) as follows:
r(n)=e jαn x u (n), where α is the cyclic shift value, and
transmit the reference signal r(n) generated based on the base sequence x u (n) on an uplink channel,
wherein the base sequence x u (n) is expressed by
x u (n)=e jp(n)π/4 , where p(n) is a phase parameter, and
if a length of the base sequence x u (n) is 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,
or
if a length of the base sequence x u (n) is 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.
7. The mobile communication terminal of claim 6 , wherein the uplink channel is a physical uplink control channel (PUCCH).
8. The mobile communication terminal of claim 6 , wherein the uplink channel is a physical uplink shared channel (PUSCH).
9. The mobile communication terminal of claim 6 , wherein the reference signal sequence r(n) is a demodulation reference signal used for demodulating uplink data.
10. The mobile communication terminal of claim 6 , wherein the reference signal sequence r(n) is a sounding reference signal used for user scheduling.