US-20260129594-A1 - SECONDARY SYNCHRONIZATION SIGNAL CONSTRUCTIONS FOR SYNCHRONIZATION SIGNAL BLOCKS

Abstract

Various aspects of the present disclosure relate to an enhanced synchronization signal block (SSB) structure or design for 6G radio access technologies and other access technologies. For example, the present disclosure introduces SSBs that carry secondary synchronization signals SSSs constructed using complementary Golay pairs. A transmitter may generate multiple Golay sequences and map the sequences to the SSS symbols of the SSBs. For adjacent SSSs, the Golay sequences may be complementary Golay pairs, where there is a base Golay sequence and a complementary Golay sequence that results in a periodic or an aperiodic autocorrelation sum being zero (or close to zero), among other criteria.

Inventors

• Karthikeyan Ganesan
• Ali RAMADAN ALI
• Ravi Kuchibhotla

Assignees

• LENOVO (UNITED STATES) INC.

Dates

Publication Date

20260507

Application Date

20260105

Claims (20)

1. 1 . A network entity for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the network entity to: generate multiple secondary synchronization signals (SSSs) constructed from a complementary Golay sequence pair; map the complementary Golay sequence pair to orthogonal frequency-division multiplexing (OFDM) symbols allocated for the SSSs; and transmit a synchronization signal block (SSB) that includes OFDM symbols allocated for primary synchronization signals (PSSs), OFDM symbols allocated for a physical broadcast channel (PBCH), and the OFDM symbols allocated for the SSSs.
2. 2 . The network entity of claim 1 , wherein the complementary Golay sequence pair includes a base Golay sequence mapped to an OFDM symbol allocated for a first SSS and a complementary Golay sequence mapped to an OFDM symbol allocated for a second SSS.
3. 3 . The network entity of claim 2 , wherein the OFDM symbol allocated for the first SSS is a fourth symbol of the SSB and the OFDM symbol allocated for the second SSS is a fifth symbol of the SSB.
4. 4 . The network entity of claim 2 , wherein the OFDM symbol allocated for the first SSS is a fourth symbol of the SSB and the OFDM symbol allocated for the second SSS is a sixth symbol of the SSB.
5. 5 . The network entity of claim 1 , wherein the complementary Golay sequence pair includes a first Golay sequence and a second Golay sequence having a periodic or an aperiodic auto correlation that is zero or close to zero.
6. 6 . The network entity of claim 1 , wherein the complementary Golay sequence pair includes a first Golay sequence and a second Golay sequence that satisfy a complementary check using cyclic shifts.
7. 7 . The network entity of claim 1 , wherein the complementary Golay sequence pair is a linear combinatorial of a base Golay sequence and complementary Golay sequence.
8. 8 . The network entity of claim 1 , wherein the complementary Golay sequence pair is generated using cyclic shifts.
9. 9 . The network entity of claim 1 , wherein the complementary Golay sequence pair is generated using sign flips or sign reversals.
10. 10 . The network entity of claim 1 , wherein the complementary Golay sequence pair is generated using convolution with Barker sequences.
11. 11 . The network entity of claim 1 , wherein the complementary Golay sequence pair is generated using concatenations.
12. 12 . The network entity of claim 1 , wherein the complementary Golay sequence pair is generated using a Prouhet-Thue-Morse (PTM) construction.
13. 13 . The network entity of claim 1 , wherein the complementary Golay sequence pair is generated using Hadamard matrix transformations.
14. 14 . A user equipment (UE) for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: receive a synchronization signal block (SSB) that includes orthogonal frequency-division multiplexing (OFDM) symbols allocated for primary synchronization signals (PSSs), OFDM symbols allocated for secondary synchronization signals (SSSs), and OFDM symbols allocated for a physical broadcast channel (PBCH), wherein the SSSs are constructed from a complementary Golay sequence pair; and detect a first SSS and a second SSS from the complementary Golay sequence pair.
15. 15 . The UE of claim 14 , wherein a base Golay sequence is mapped to an OFDM symbol allocated for the first SSS and a complementary Golay sequence is mapped to an OFDM symbol allocated for a second SSS.
16. 16 . The UE of claim 15 , wherein the OFDM symbol allocated for the first SSS is a fourth symbol of the SSB and the OFDM symbol allocated for the second SSS is a fifth symbol of the SSB.
17. 17 . The UE of claim 15 , wherein the OFDM symbol allocated for the first SSS is a fourth symbol of the SSB and the OFDM symbol allocated for the second SSS is a sixth symbol of the SSB.
18. 18 . The UE of claim 14 , wherein the complementary Golay sequence pair includes a first Golay sequence and a second Golay sequence having a periodic or an aperiodic auto correlation that is zero or close to zero.
19. 19 . A method performed by a network entity, the method comprising: generating multiple secondary synchronization signals (SSSs) constructed from a complementary Golay sequence pair; mapping the complementary Golay sequence pair to orthogonal frequency-division multiplexing (OFDM) symbols allocated for the SSSs; and transmitting a synchronization signal block (SSB) that includes OFDM symbols allocated for primary synchronization signals (PSSs), OFDM symbols allocated for a physical broadcast channel (PBCH), and the OFDM symbols allocated for the SSSs.
20. 20 . A method performed by a user equipment (UE), the method comprising: receiving a synchronization signal block (SSB) that includes orthogonal frequency-division multiplexing (OFDM) symbols allocated for primary synchronization signals (PSSs), OFDM symbols allocated for secondary synchronization signals (SSSs), and OFDM symbols allocated for a physical broadcast channel (PBCH), wherein the SSSs are constructed from a complementary Golay sequence pair; and detecting a first SSS and a second SSS from the complementary Golay sequence pair.

Description

TECHNICAL FIELD The present disclosure relates to wireless communications, and more specifically to the design of synchronization signal blocks (SSBs), such as various secondary synchronization signal (SSS) structures for SSBs. BACKGROUND A wireless communications system may include one or multiple network communication devices, such as base stations, which may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE), or other suitable terminology. The wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communications system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers, or the like). Additionally, the wireless communications system may support wireless communications across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G)). The wireless communications system may support XL MIMO technologies, such as large-scale deployments (1000+) of antenna elements, which can improve the capacity of the network, data rates, and spectral efficiency. For example, 6G radio access technologies may include an antenna element configuration of 5000 or more antenna elements in an upper mid-band frequency (e.g., 7 to 24 GHz). SUMMARY An article “a” before an element is unrestricted and understood to refer to “at least one” of those elements or “one or more” of those elements. The terms “a,” “at least one,” “one or more,” and “at least one of one or more” may be interchangeable. As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” or “one or both of”) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. Further, as used herein, including in the claims, a “set” may include one or more elements. The present disclosure relates to methods, apparatuses, and systems that enable a network to provide enhanced designs of SSBs, such as various enhanced SSS structures for SSBs. A network entity for wireless communication is described. The network entity may be configured to, capable of, or operable to perform one or more operations as described herein. For example, the network entity may comprise at least one memory and at least one processor coupled with the at least one memory and configured to cause the network entity to generate multiple SSSs constructed from a complementary Golay sequence pair, map the complementary Golay sequence pair to orthogonal frequency-division multiplexing (OFDM) symbols allocated for the SSSs, and transmit an SSB that includes OFDM symbols allocated for primary synchronization signals (PSSs), OFDM symbols allocated for a physical broadcast channel (PBCH), and the OFDM symbols allocated for the SSSs. A method performed or performable by the network entity is described. The method may comprise generating multiple SSSs constructed from a complementary Golay sequence pair, map the complementary Golay sequence pair to OFDM symbols allocated for the SSSs, and transmit an SSB that includes OFDM symbols allocated for PSS symbols, OFDM symbols allocated for PBHH, and the OFDM symbols allocated for the SSSs. In some implementations of the network entity and method described herein, the complementary Golay sequence pair includes a base Golay sequence mapped to an OFDM symbol allocated for a first SSS and a complementary Golay sequence mapped to an OFDM symbol allocated for a second SSS. In some implementations of the network entity and method described herein, the OFDM symbol allocated for the first SSS is a fourth symbol of the SSB and the OFDM symbol allocated for the second SSS is a fifth symbol of the SSB. In some implementations of the network entity and method described herein, the OFDM symbol allocated for the first SSS is a fourth symbol of the SSB and the OFDM symbol allocated for the second SSS is a sixth symbol of the SSB. In some implementations of the network entity and method described herein, the complementary Golay sequence pair includes a first Golay sequence and a second Golay sequence having a per