Low peak-to-average power ratio (PAPR) reference signal (RS) design for high frequency bands
Various embodiments herein provide techniques for reference signal (RS) configuration for high frequency bands (e.g., frequency above 52.6 GHz). For example, embodiments may include techniques for configuration of a demodulation reference signal (DM-RS), a channel state information reference signal (CSI-RS), and/or a sounding reference signal (SRS). The RS configuration may provide a low peak-to-average power ratio (PAPR) compared to prior techniques. Other embodiments may be described and claimed.
1. One or more non-transitory computer-readable media (NTCRM) having instructions, stored thereon, that when executed by one or more processors cause a next generation NodeB (gNB) to:
generate a complementary binary sequence pair for transmission of a reference signal on a first antenna port, wherein the complementary binary sequence pair includes a first binary sequence for transmission on a first Discrete Fourier Transform spreading Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) symbol and a second binary sequence for transmission on a second DFT-s-OFDM symbol;
modulate the complementary binary sequence pair according to π/2-BPSK modulation;
generate a modified complementary binary sequence pair, wherein generation of the modified complementary binary sequence pair includes:
reversing a sequence order of the first and second binary sequences to generate a reversed first binary sequence and a reversed second binary sequence;
associating the reversed first binary sequence for transmission on the second DFT-s-OFDM symbol and associating the reversed second binary sequence for transmission on the first DFT-s-OFDM symbol; and
switching a sign of one of the reversed first binary sequence that is to be transmitted on the second DFT-s-OFDM symbol and the reversed second binary sequence that is to be transmitted on the second DFT-s-OFDM symbol; and
use the modified complementary binary sequence pair for transmission of the reference signal on a second antenna port.
2. The one or more NTCRM of claim 1 , wherein to use the modified complementary binary sequence pair for transmission of the reference signal includes to perform Discrete Fourier Transform (DFT) spreading of the modified complementary binary sequence pair.
3. The one or more NTCRM of claim 1 , wherein the reference signal is transmitted at a frequency of 52.4 gigahertz (GHz) or greater.
4. The one or more NTCRM of claim 1 , wherein the complementary binary sequence pair is selected from a set of 15 pre-identified complementary sequences.
5. The one or more NTCRM of claim 4 , wherein the first binary sequence is a(i) and the second binary sequence is b(i), and the set of 15 pre-identified complementary sequences are:
#
1 st Sequence-a(i)
2 nd Sequence-b(i)
0
1
0
0
1
1
1
1
1
0
1
0
1
0
0
1
1
1
0
1
0
1
0
0
1
1
1
0
0
1
1
1
1
1
2
0
0
0
0
1
0
0
1
1
1
0
0
0
1
0
1
3
1
1
0
0
0
1
0
1
0
0
0
0
1
0
0
1
4
0
1
1
0
1
1
1
1
1
0
1
0
0
0
1
1
5
1
0
0
0
1
1
0
1
0
1
1
1
1
1
0
1
6
0
1
1
1
1
1
0
1
1
0
0
0
1
1
0
1
7
1
1
1
0
1
1
0
1
0
0
0
1
1
1
0
1
8
0
0
1
1
0
1
0
1
1
1
1
1
1
0
0
1
9
1
1
1
1
1
0
0
1
0
0
1
1
0
1
0
1
10
0
1
0
0
0
0
0
1
1
0
1
1
0
0
0
1
11
1
0
1
1
0
1
1
1
0
1
0
0
0
1
1
1
12
1
0
1
1
0
0
0
1
0
1
0
0
0
0
0
1
13
0
0
1
0
0
1
1
1
1
1
0
1
0
1
1
1
14
0
1
1
1
1
0
1
1
1
0
0
0
1
0
1
1.
6. The one or more NTCRM of claim 1 , wherein the complementary sequence pair is related to a demodulation reference signal (DM-RS).
7. The one or more NTCRM of claim 1 , wherein the sum of a first normalized cyclic autocorrelation function of the first binary sequence and a second normalized cyclic autocorrelation function of the second binary sequence yields ideal autocorrelation.
8. A base station comprising:
one or more processors; and
one or more non-transitory computer-readable media (NTCRM) having instructions, stored thereon, that when executed by one or more processors cause the base station to:
generate a complementary binary sequence pair for transmission of a reference signal on a first antenna port, wherein the complementary binary sequence pair includes a first binary sequence for transmission on a first Discrete Fourier Transform spreading Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) symbol and a second binary sequence for transmission on a second DFT-s-OFDM symbol;
modulate the complementary binary sequence pair according to π/2-BPSK modulation;
generate a modified complementary binary sequence pair, wherein generation of the modified complementary binary sequence pair includes:
reversing a sequence order of the first and second binary sequences to generate a reversed first binary sequence and a reversed second binary sequence;
associating the reversed first binary sequence for transmission on the second DFT-s-OFDM symbol and associating the reversed second binary sequence for transmission on the first DFT-s-OFDM symbol; and
switching a sign of one of the reversed first binary sequence that is to be transmitted on the second DFT-s-OFDM symbol and the reversed second binary sequence that is to be transmitted on the second DFT-s-OFDM symbol; and
switching a sign of one of the first or second binary sequences; and
use the modified complementary binary sequence pair for transmission of the reference signal on a second antenna port.
9. The base station of claim 8 , wherein to use the modified complementary binary sequence pair for transmission of the reference signal includes to perform Discrete Fourier Transform (DFT) spreading of the modified complementary binary sequence pair.
10. The base station of claim 8 , wherein the reference signal is transmitted at a frequency of 52.4 gigahertz (GHz) or greater.
11. The base station of claim 8 , wherein the complementary binary sequence pair is selected from a set of 15 pre-identified complementary sequences.
12. The base station of claim 11 , wherein the first binary sequence is a(i) and the second binary sequence is b(i), and the set of 15 pre-identified complementary sequences are:
#
1 st Sequence-a(i)
2 nd Sequence-b(i)
0
1
0
0
1
1
1
1
1
0
1
0
1
0
0
1
1
1
0
1
0
1
0
0
1
1
1
0
0
1
1
1
1
1
2
0
0
0
0
1
0
0
1
1
1
0
0
0
1
0
1
3
1
1
0
0
0
1
0
1
0
0
0
0
1
0
0
1
4
0
1
1
0
1
1
1
1
1
0
1
0
0
0
1
1
5
1
0
0
0
1
1
0
1
0
1
1
1
1
1
0
1
6
0
1
1
1
1
1
0
1
1
0
0
0
1
1
0
1
7
1
1
1
0
1
1
0
1
0
0
0
1
1
1
0
1
8
0
0
1
1
0
1
0
1
1
1
1
1
1
0
0
1
9
1
1
1
1
1
0
0
1
0
0
1
1
0
1
0
1
10
0
1
0
0
0
0
0
1
1
0
1
1
0
0
0
1
11
1
0
1
1
0
1
1
1
0
1
0
0
0
1
1
1
12
1
0
1
1
0
0
0
1
0
1
0
0
0
0
0
1
13
0
0
1
0
0
1
1
1
1
1
0
1
0
1
1
1
14
0
1
1
1
1
0
1
1
1
0
0
0
1
0
1
1.
13. The base station of claim 8 , wherein the complementary sequence pair is related to a demodulation reference signal (DM-RS).
14. The base station of claim 8 , wherein the sum of a first normalized cyclic autocorrelation function of the first binary sequence and a second normalized cyclic autocorrelation function of the second binary sequence yields ideal autocorrelation.
15. An electronic device for use in a base station, wherein the apparatus comprises:
one or more processors; and
one or more non-transitory computer-readable media (NTCRM) having instructions, stored thereon, that when executed by one or more processors cause the electronic device to:
generate a complementary binary sequence pair for transmission of a reference signal on a first antenna port, wherein the complementary binary sequence pair includes a first binary sequence for transmission on a first Discrete Fourier Transform spreading Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) symbol and a second binary sequence for transmission on a second DFT-s-OFDM symbol;
modulate the complementary binary sequence pair according to π/2-BPSK modulation;
generate a modified complementary binary sequence pair, wherein generation of the modified complementary binary sequence pair includes:
reversing a sequence order of the first and second binary sequences to generate a reversed first binary sequence and a reversed second binary sequence;
associating the reversed first binary sequence for transmission on the second DFT-s-OFDM symbol and associating the reversed second binary sequence for transmission on the first DFT-s-OFDM symbol; and
switching a sign of one of the reversed first binary sequence that is to be transmitted on the second DFT-s-OFDM symbol and the reversed second binary sequence that is to be transmitted on the second DFT-s-OFDM symbol; and
use the modified complementary binary sequence pair for transmission of the reference signal on a second antenna port.
16. The electronic device of claim 15 , wherein to use the modified complementary binary sequence pair for transmission of the reference signal includes to perform Discrete Fourier Transform (DFT) spreading of the modified complementary binary sequence pair.
17. The electronic device of claim 15 , wherein the complementary binary sequence pair is selected from a set of 15 pre-identified complementary sequences.