Reference signal sequence representation in wireless communication device
View Patent ↗A wireless communication device including a controller communicably coupled to a transceiver. In one embodiment, the controller generates a QPSK sequence having multiple elements wherein each element includes real and imaginary parts. In another embodiment, the sequence is selected from a groups of sequences stored on a user terminal. Thereafter, the controller generates a reference signal based on the information representative of the selected QPSK sequence.
1. A wireless communication user terminal, the terminal comprising:
a transceiver;
a controller communicably coupled to the transceiver and to memory,
information stored in the memory, the information representative of a plurality of Quadrature Phase Shift Keying (QPSK) sequences,
each of the QPSK sequence includes 24 elements wherein each of the 24 elements includes a phase component of π/4 weighted by a phase scaling factor, as follows:
Element Phase Scaling Factors
1
2
3
4
5
6
7
8
9
10
11
12
QPSK_Se-
−3
3
3
−1
−1
−3
−1
3
1
3
1
3
quences
−3
1
1
3
−1
1
3
1
−3
1
−3
1
−3
−3
1
1
−1
1
−1
1
−1
3
1
−3
−3
−1
−3
3
1
−1
−3
−1
−3
−3
3
−3
3
−1
3
3
1
1
−3
3
3
3
3
1
Element Phase Scaling Factors
13
14
15
16
17
18
19
20
21
22
23
24
QPSK_Se-
1
1
−1
3
1
−1
1
3
−3
−1
−1
1
quences
1
−1
−1
3
−1
−3
3
−3
−3
−3
1
1
−1
1
−1
1
−1
−1
3
3
−3
−1
1
−3
3
−3
−1
1
3
1
−3
1
3
3
−1
−3
−1
3
−1
1
1
−1
−3
−1
−1
1
3
3
the controller configured to select a QPSK sequence and to generate a reference signal based on the information representative of the selected QPSK sequence.
2. The terminal of claim 1 , the information stored in the memory is representative of the phase component of each of the 24 elements.
3. The terminal of claim 1 , wherein each of the 24 elements further includes a phase component of π/4 weighted by a phase scaling factor as follows:
Element Phase Scaling Factors
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
QPSK_Sequences
1
−3
3
−3
3
3
−1
3
1
−1
3
−3
1
−1
1
1
3
3
−3
1
−1
−3
−3
1
1
2
1
−1
−3
−1
−1
−3
3
3
−1
−3
−3
−3
1
1
3
−3
3
−3
3
−1
3
−3
−1
1
3
−1
−1
3
−1
3
−3
−1
−1
1
−1
−3
−3
−3
−3
−1
1
−1
−3
1
1
1
−1
3
−1
4
3
3
−1
3
3
3
−3
1
−3
1
1
−1
−1
−1
−1
3
3
−1
−3
−1
−1
1
−3
1
5
1
3
3
3
3
3
−1
−1
3
−1
1
1
−1
−1
−1
1
3
−3
3
1
1
−1
3
−1
6
−1
−1
−3
−3
3
1
3
−3
3
1
−3
1
1
1
1
3
3
−3
3
1
−1
3
−3
−1
7
−3
1
1
1
−1
3
1
−3
1
−1
−1
−1
−1
−3
1
1
3
−3
1
3
1
3
−3
1
8
1
3
−3
−1
1
3
3
−1
−1
−3
1
−3
3
3
−1
−3
−1
−3
1
−3
3
3
3
1
9
−1
1
1
−3
−3
1
−1
−1
−1
1
−3
3
−3
−3
−3
−3
3
−3
−1
1
−1
1
−1
−3
10
1
−1
1
1
−1
3
3
−3
3
3
3
1
1
1
−3
1
3
1
−3
−3
−1
1
1
−3
11
−1
−3
1
3
−1
−3
−1
−1
3
1
−1
1
1
1
−1
3
−3
−1
−3
−3
−1
1
−1
−3
12
−1
1
−3
1
1
3
−3
−3
−3
1
−1
−3
3
−1
1
1
1
1
−1
1
−1
−3
−1
3
13
1
3
−3
−3
1
−3
1
1
3
3
1
3
−3
3
−1
1
−3
−3
1
−1
−1
−3
−1
−3
14
3
1
−1
−1
3
1
−1
1
1
−3
1
−1
−1
1
3
3
3
3
3
−1
1
−3
1
−3
15
1
−3
−1
−1
−3
−1
−3
3
−1
−1
3
−3
−1
−3
−3
3
−1
1
1
3
1
3
−1
−3
16
3
−3
−3
−3
1
−3
−1
1
−3
−3
−1
−3
3
1
−3
−3
−3
3
1
3
1
−3
1
3
17
−3
1
3
−1
−3
−1
−1
3
1
−1
1
1
1
−1
3
−3
−1
−3
−3
−1
1
−1
−3
−3
18
1
1
−3
1
−1
−1
−3
3
−1
−1
1
−1
1
1
−1
−3
−1
3
−3
1
1
3
−3
−3
19
−3
3
1
−3
−3
−3
1
−3
−3
−3
−1
1
−1
−3
3
−3
3
3
−3
−1
3
−1
1
1
21
1
−1
3
−3
3
3
−1
−3
3
−3
1
3
3
1
−3
−1
−3
−1
−1
3
3
−1
−1
1
22
−3
1
1
−3
−1
−1
3
−1
3
1
3
1
3
−1
3
3
1
3
−3
3
−3
1
1
1
23
−1
3
1
1
3
1
−3
3
3
1
1
−3
1
1
−3
−1
−1
1
3
3
−3
3
−1
1
25
−3
−1
1
3
1
−1
−1
−3
−1
−1
−3
1
−1
−3
3
−3
−1
−3
−1
3
1
−1
1
−3
29
1
1
1
−1
1
−1
−3
3
−1
−1
1
−3
−1
1
3
3
3
−1
−3
1
3
1
−3
−3
30
−1
−3
1
−1
−3
−1
1
3
3
−3
−3
3
3
1
3
−3
3
−1
−3
−1
3
−3
3
3
4. The terminal of claim 3 , the information stored in the memory is representative of a real part and an imaginary part of each of the 24 elements wherein the real parts of each of the 24 elements of the QPSK sequences are
Element Real Parts multiplied by sqrt(2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
QPSK_Sequences
1
−1
−1
−1
−1
−1
1
−1
1
1
−1
−1
1
1
1
1
−1
−1
−1
1
1
−1
−1
1
1
2
1
1
−1
1
1
−1
−1
−1
1
−1
−1
−1
1
1
−1
−1
−1
−1
−1
1
−1
−1
1
1
3
1
1
−1
1
−1
−1
1
1
1
1
−1
−1
−1
−1
1
1
1
−1
1
1
1
1
−1
1
4
−1
−1
1
−1
−1
−1
−1
1
−1
1
1
1
1
1
1
−1
−1
1
−1
1
1
1
−1
1
5
1
−1
−1
−1
−1
−1
1
1
−1
1
1
1
1
1
1
1
−1
−1
−1
1
1
1
−1
1
6
1
1
−1
−1
−1
1
−1
−1
−1
1
−1
1
1
1
1
−1
−1
−1
−1
1
1
−1
−1
1
7
−1
1
1
1
1
−1
1
−1
1
1
1
1
1
−1
1
1
−1
−1
1
−1
1
−1
−1
1
8
1
−1
−1
1
1
−1
−1
1
1
−1
1
−1
−1
−1
1
−1
1
−1
1
−1
−1
−1
−1
1
9
1
1
1
−1
−1
1
1
1
1
1
−1
−1
−1
−1
−1
−1
−1
−1
1
1
1
1
1
−1
10
1
1
1
1
1
−1
−1
−1
−1
−1
−1
1
1
1
−1
1
−1
1
−1
−1
1
1
1
−1
11
1
−1
1
−1
1
−1
1
1
−1
1
1
1
1
1
1
−1
−1
1
−1
−1
1
1
1
−1
12
1
1
−1
1
1
−1
−1
−1
−1
1
1
−1
−1
1
1
1
1
1
1
1
1
−1
1
−1
13
1
−1
−1
−1
1
−1
1
1
−1
−1
1
−1
−1
−1
1
1
−1
−1
1
1
1
−1
1
−1
14
−1
1
1
1
−1
1
1
1
1
−1
1
1
1
1
−1
−1
−1
−1
−1
1
1
−1
1
−1
15
1
−1
1
1
−1
1
−1
−1
1
1
−1
−1
1
−1
−1
−1
1
1
1
−1
1
−1
1
−1
16
−1
−1
−1
−1
1
−1
1
1
−1
−1
1
−1
−1
1
−1
−1
−1
−1
1
−1
1
−1
1
−1
17
−1
1
−1
1
−1
1
1
−1
1
1
1
1
1
1
−1
−1
1
−1
−1
1
1
1
−1
−1
18
1
1
−1
1
1
1
−1
−1
1
1
1
1
1
1
1
−1
1
−1
−1
1
1
−1
−1
−1
19
−1
−1
1
−1
−1
−1
1
−1
−1
−1
1
1
1
−1
−1
−1
−1
−1
−1
1
−1
1
1
1
20
−1
−1
−1
1
1
−1
1
−1
1
−1
1
−1
1
1
1
−1
1
1
1
−1
−1
1
1
1
21
1
1
−1
−1
−1
−1
1
−1
−1
−1
1
−1
−1
1
−1
1
−1
1
1
−1
−1
1
1
1
22
−1
1
1
−1
1
1
−1
1
−1
1
−1
1
−1
1
−1
−1
1
−1
−1
−1
−1
1
1
1
23
1
−1
1
1
−1
1
−1
−1
−1
1
1
−1
1
1
−1
1
1
1
−1
−1
−1
−1
1
1
24
−1
1
1
−1
1
1
−1
1
−1
1
−1
1
1
1
1
−1
1
−1
−1
−1
−1
−1
1
1
25
−1
1
1
−1
1
1
1
−1
1
1
−1
1
1
−1
−1
−1
1
−1
1
−1
1
1
1
−1
26
−1
−1
1
1
1
1
1
1
1
−1
1
−1
1
1
1
1
1
1
−1
−1
−1
1
1
−1
27
−1
1
−1
−1
1
1
−1
1
−1
−1
−1
−1
−1
−1
1
1
−1
1
−1
1
−1
−1
1
−1
28
−1
1
−1
−1
1
1
−1
−1
−1
−1
−1
1
1
−1
1
1
1
1
−1
1
1
1
−1
−1
29
1
1
1
1
1
1
−1
−1
1
1
1
−1
1
1
−1
−1
−1
1
−1
1
−1
1
−1
−1
30
1
−1
1
1
−1
1
1
−1
−1
−1
−1
−1
−1
1
−1
−1
−1
1
−1
1
−1
−1
−1
−1
and the imaginary parts of each of the 24 elements of the QPSK sequences are
Element Imaginary Parts multiplied by sqrt(2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
QPSK_Sequences
1
−1
1
−1
1
1
−1
1
1
−1
1
−1
1
−1
1
1
1
1
−1
1
−1
−1
−1
1
1
2
1
−1
−1
−1
−1
−1
1
1
−1
−1
−1
−1
1
1
1
−1
1
−1
1
−1
1
−1
−1
1
3
−1
−1
1
−1
1
−1
−1
−1
1
−1
−1
−1
−1
−1
−1
1
−1
−1
1
1
1
−1
1
−1
4
1
1
−1
1
1
1
−1
1
−1
1
1
−1
−1
−1
−1
1
1
−1
−1
−1
−1
1
−1
1
5
1
1
1
1
1
1
−1
−1
1
−1
1
1
−1
−1
−1
1
1
−1
1
1
1
−1
1
−1
6
−1
−1
−1
−1
1
1
1
−1
1
1
−1
1
1
1
1
1
1
−1
1
1
−1
1
−1
−1
7
−1
1
1
1
−1
1
1
−1
1
−1
−1
−1
−1
−1
1
1
1
−1
1
1
1
1
−1
1
8
1
1
−1
−1
1
1
1
−1
−1
−1
1
−1
1
1
−1
−1
−1
−1
1
−1
1
1
1
1
9
−1
1
1
−1
−1
1
−1
−1
−1
1
−1
1
−1
−1
−1
−1
1
−1
−1
1
−1
1
−1
−1
10
1
−1
1
1
−1
1
1
−1
1
1
1
1
1
1
−1
1
1
1
−1
−1
−1
1
1
−1
11
−1
−1
1
1
−1
−1
−1
−1
1
1
−1
1
1
1
−1
1
−1
−1
−1
−1
−1
1
−1
−1
12
−1
1
−1
1
1
1
−1
−1
−1
1
−1
−1
1
−1
1
1
1
1
−1
1
−1
−1
−1
1
13
1
1
−1
−1
1
−1
1
1
1
1
1
1
−1
1
−1
1
−1
−1
1
−1
−1
−1
−1
−1
14
1
1
−1
−1
1
1
−1
1
1
−1
1
−1
−1
1
1
1
1
1
1
−1
1
−1
1
−1
15
1
−1
−1
−1
−1
−1
−1
1
−1
−1
1
−1
−1
−1
−1
1
−1
1
1
1
1
1
−1
−1
16
1
−1
−1
−1
1
−1
−1
1
−1
−1
−1
−1
1
1
−1
−1
−1
1
1
1
1
−1
1
1
17
−1
1
1
−1
−1
−1
−1
1
1
−1
1
1
1
−1
1
−1
−1
−1
−1
−1
1
−1
−1
−1
18
1
1
−1
1
−1
−1
−1
1
−1
−1
1
−1
1
1
−1
−1
−1
1
−1
1
1
1
−1
−1
19
−1
1
1
−1
−1
−1
1
−1
−1
−1
−1
1
−1
−1
1
−1
1
1
−1
−1
1
−1
1
1
20
−1
1
1
−1
−1
−1
−1
1
1
1
1
1
1
1
−1
1
1
−1
1
1
−1
−1
−1
1
21
1
−1
1
−1
1
1
−1
−1
1
−1
1
1
1
1
−1
−1
−1
−1
−1
1
1
−1
−1
1
22
−1
1
1
−1
−1
−1
1
−1
1
1
1
1
1
−1
1
1
1
1
−1
1
−1
1
1
1
23
−1
1
1
1
1
1
−1
1
1
1
1
−1
1
1
−1
−1
−1
1
1
1
−1
1
−1
1
24
−1
1
1
1
−1
1
1
1
−1
1
−1
1
1
−1
−1
1
−1
−1
1
−1
−1
−1
1
1
25
−1
−1
1
1
1
−1
−1
−1
−1
−1
−1
1
−1
−1
1
−1
−1
−1
−1
1
1
−1
1
−1
26
−1
−1
1
1
−1
1
−1
1
−1
1
1
−1
−1
1
−1
1
−1
−1
1
1
−1
−1
1
−1
27
−1
−1
−1
1
1
−1
−1
−1
−1
−1
1
−1
1
−1
−1
1
1
1
−1
1
1
1
−1
−1
28
1
−1
1
1
1
1
−1
1
1
1
1
1
−1
1
−1
1
1
−1
−1
−1
−1
1
1
1
29
1
1
1
−1
1
−1
−1
1
−1
−1
1
−1
−1
1
1
1
1
−1
−1
1
1
1
−1
−1
30
−1
−1
1
−1
−1
−1
1
1
1
−1
−1
1
1
1
1
−1
1
−1
−1
−1
1
−1
1
1
5. The terminal of claim 1 , the information stored in the memory is representative of a real part and an imaginary part of each of the 24 elements.
6. The terminal of claim 5 , wherein the real parts of each of the 24 elements of the QPSK sequences are:
Element Real Parts multiplied by 1.414
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
QPSK_Sequences
−1
−1
−1
1
1
−1
1
−1
1
−1
1
−1
1
1
1
−1
1
1
1
−1
−1
1
1
1
−1
1
1
−1
1
1
−1
1
−1
1
−1
1
1
1
1
−1
1
−1
−1
−1
−1
−1
1
1
−1
−1
1
1
1
1
1
1
1
−1
1
−1
1
1
1
1
1
1
−1
−1
−1
1
1
−1
−1
1
−1
−1
1
1
−1
1
−1
−1
−1
−1
−1
−1
1
1
−1
1
−1
1
−1
−1
1
−1
−1
1
−1
−1
1
1
−1
−1
−1
−1
−1
1
1
−1
1
1
1
1
−1
1
1
1
−1
−1
and the imaginary parts of each of the 24 elements of the QPSK sequences are:
Element Imaginary Parts multiplied by 1.414
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
QPSK_Sequences
−1
1
1
−1
−1
−1
−1
1
1
1
1
1
1
1
−1
1
1
−1
1
1
−1
−1
−1
1
−1
1
1
1
−1
1
1
1
−1
1
−1
1
1
−1
−1
1
−1
−1
1
−1
−1
−1
1
1
−1
−1
1
1
−1
1
−1
1
−1
1
1
−1
−1
1
−1
1
−1
−1
1
1
−1
−1
1
−1
−1
−1
−1
1
1
−1
−1
−1
−1
−1
1
−1
1
−1
−1
1
1
1
−1
1
1
1
−1
−1
1
−1
1
1
1
1
−1
1
1
1
1
1
−1
1
−1
1
1
−1
−1
−1
−1
1
1
1
7. The terminal of claim 5 , each element includes a real part of 1/sqrt(2) and an imaginary part of 1/sqrt(2) wherein the real part and the imaginary part are weighted by a +/−1 scaling factor indicated by a “0” value or a “1” value as follows:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Element Real Part
QPSK_Sequences
1
1
1
0
0
1
0
1
0
1
0
1
0
0
0
1
0
0
0
1
1
0
0
0
1
0
0
1
0
0
1
0
1
0
1
0
0
0
0
1
0
1
1
1
1
1
0
0
1
1
0
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
1
1
1
0
0
1
1
0
1
1
0
0
1
0
1
1
1
1
1
1
0
0
1
0
1
0
1
1
0
1
1
0
1
1
0
0
1
1
1
1
1
0
0
1
0
0
0
0
1
0
0
0
1
1
and
Element Imaginary Part
QPSK_Sequences
1
0
0
1
1
1
1
0
0
0
0
0
0
0
1
0
0
1
0
0
1
1
1
0
1
0
0
0
1
0
0
0
1
0
1
0
0
1
1
0
1
1
0
1
1
1
0
0
1
1
0
0
1
0
1
0
1
0
0
1
1
0
1
0
1
1
0
0
1
1
0
1
1
1
1
0
0
1
1
1
1
1
0
1
0
1
1
0
0
0
1
0
0
0
1
1
0
1
0
0
0
0
1
0
0
0
0
0
1
0
1
0
0
1
1
1
1
0
0
0.
8. The terminal of claim 1 , the controller configured to generate the reference signal by modulating the selected QPSK sequence on a set of sub-carriers.
9. The terminal of claim 1 , the controller configured to cyclically time shift the selected QPSK sequence prior to generating the reference signal.
10. The terminal of claim 1 , the controller configured to select the QPSK sequence based on base station identification.