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 computer-implemented method for transmitting a reference signal in a wireless communication system, the method comprising:
executing, by a processor of a user equipment, instructions stored on non-transitory media which when executed perform the acts of:
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):
Sequence
index
(u)
p(0), . . . , p(11)
0
−1 −3 −1 1 1 −3 3 1 3 1 1 −1
1
−1 3 3 −3 3 1 −1 −1 −3 −1 1 −1
2
−1 1 −3 −1 −3 −3 −3 1 −1 −3 1 −1
3
−1 3 −1 1 1 −3 −3 −1 −3 −3 3 −1
4
−1 3 1 −3 3 −3 −1 −3 −3 3 −3 −1
5
−1 1 3 3 1 −3 3 3 1 3 −1 −1
6
−1 1 1 3 −1 1 1 1 −1 −3 3 −1
7
−1 1 1 −1 −1 −1 3 1 3 −3 3 −1
8
−1 3 1 3 1 −1 −1 3 −3 −1 −3 −1
9
−1 −3 1 −1 −3 1 1 1 −1 1 −3 −1
10
−1 −3 −1 −3 −1 −1 3 −3 −3 3 1 −1
11
−1 −3 1 1 −1 1 −1 −1 3 −3 −3 −1
12
−1 1 −3 −1 1 −1 3 3 1 −1 1 −1
13
−1 −3 1 3 −1 −1 3 1 1 1 1 −1
14
−1 −1 1 1 −1 −3 −1 −3 −3 1 3 −1
15
−1 −3 3 −1 1 1 −3 −1 −3 −1 −1 −1
16
−1 1 −3 3 −1 −1 3 −3 −3 −3 −3 −1
17
−1 3 3 −3 3 −3 −3 1 1 −1 −3 −1
18
−1 −1 −3 −1 −3 −3 1 1 3 −3 3 −1
19
−1 3 −3 1 −1 3 −1 −3 −3 −1 −1 −1
20
−1 1 −1 −3 −1 −1 1 3 −3 3 3 −1
21
−1 1 −1 1 1 3 −1 −1 −3 3 3 −1
22
−1 1 3 −3 −3 3 −1 −1 −3 −1 −3 −1
23
−1 −3 1 −1 −3 −1 3 −3 3 −3 −1 −1
24
−1 −3 −3 −3 1 −1 1 1 −3 −1 1 −1
25
−1 −3 −1 1 1 3 −1 1 −1 −3 3 −1
26
−1 3 3 1 −3 −3 −1 1 1 −1 1 −1
27
−1 3 1 −1 −3 −3 −3 −1 3 −3 −3 −1
28
−1 −3 1 1 1 1 3 1 −1 1 −3 −1
29
−1 3 −3 3 −1 3 3 −3 3 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 communications terminal configured to transmit a reference signal in a wireless communication system, comprising:
a processor configured to execute instructions stored on non-transitory media which when executed perform the acts of:
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
a transmitter configured to transmit 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):
Sequence
index
(u)
p(0), . . . , p(11)
0
−1 −3 −1 1 1 −3 3 1 3 1 1 −1
1
−1 3 3 −3 3 1 −1 −1 −3 −1 1 −1
2
−1 1 −3 −1 −3 −3 −3 1 −1 −3 1 −1
3
−1 3 −1 1 1 −3 −3 −1 −3 −3 3 −1
4
−1 3 1 −3 3 −3 −1 −3 −3 3 −3 −1
5
−1 1 3 3 1 −3 3 3 1 3 −1 −1
6
−1 1 1 3 −1 1 1 1 −1 −3 3 −1
7
−1 1 1 −1 −1 −1 3 1 3 −3 3 −1
8
−1 3 1 3 1 −1 −1 3 −3 −1 −3 −1
9
−1 −3 1 −1 −3 1 1 1 −1 1 −3 −1
10
−1 −3 −1 −3 −1 −1 3 −3 −3 3 1 −1
11
−1 −3 1 1 −1 1 −1 −1 3 −3 −3 −1
12
−1 1 −3 −1 1 −1 3 3 1 −1 1 −1
13
−1 −3 1 3 −1 −1 3 1 1 1 1 −1
14
−1 −1 1 1 −1 −3 −1 −3 −3 1 3 −1
15
−1 −3 3 −1 1 1 −3 −1 −3 −1 −1 −1
16
−1 1 −3 3 −1 −1 3 −3 −3 −3 −3 −1
17
−1 3 3 −3 3 −3 −3 1 1 −1 −3 −1
18
−1 −1 −3 −1 −3 −3 1 1 3 −3 3 −1
19
−1 3 −3 1 −1 3 −1 −3 −3 −1 −1 −1
20
−1 1 −1 −3 −1 −1 1 3 −3 3 3 −1
21
−1 1 −1 1 1 3 −1 −1 −3 3 3 −1
22
−1 1 3 −3 −3 3 −1 −1 −3 −1 −3 −1
23
−1 −3 1 −1 −3 −1 3 −3 3 −3 −1 −1
24
−1 −3 −3 −3 1 −1 1 1 −3 −1 1 −1
25
−1 −3 −1 1 1 3 −1 1 −1 −3 3 −1
26
−1 3 3 1 −3 −3 −1 1 1 −1 1 −1
27
−1 3 1 −1 −3 −3 −3 −1 3 −3 −3 −1
28
−1 −3 1 1 1 1 3 1 −1 1 −3 −1
29
−1 3 −3 3 −1 3 3 −3 3 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.