US-12627542-B2 - Frequency offset correction

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a first communication having a first frequency offset correction applied. The UE may receive an indication of a frequency offset of the first communication. The UE may transmit a second communication having a second frequency offset correction applied, the second frequency offset correction based at least in part on the first frequency offset correction and the frequency offset of the first communication. Numerous other aspects are described.

Inventors

• Noam Zach
• Guy Wolf
• Sharon Levy
• Gideon Shlomo KUTZ
• Shay Landis

Assignees

• QUALCOMM INCORPORATED

Dates

Publication Date

20260512

Application Date

20221228

Claims (20)

1. 1 . A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors, coupled to the memory, configured to: transmit a first uplink communication having a first frequency offset correction applied; receive an indication of a frequency offset of the first uplink communication, wherein the indication is based at least in part on an average frequency offset of communications transmitted by the UE during a period of time; and transmit a second uplink communication having a second frequency offset correction applied, the second frequency offset correction based at least in part on the first frequency offset correction and the frequency offset of the first uplink communication.
2. 2 . The UE of claim 1 , wherein the indication of the frequency offset of the first uplink communication comprises: a UE-specific indication, or a group-specific indication.
3. 3 . The UE of claim 1 , wherein the one or more processors, to receive the indication of the frequency offset of the first uplink communication, are configured to receive the indication via one or more of: a periodic communication, an aperiodic communication, downlink control information (DCI), a communication that includes a timing advance indication, or a communication that includes an allocation for the second uplink communication.
4. 4 . The UE of claim 1 , wherein the receiving the indication of the frequency offset of the first uplink communication is based at least in part on one or more of: a number of multiple-input multiple-output (MIMO) layers of one or more of the first uplink communication or the second uplink communication, subcarrier spacing of the first uplink communication or the second uplink communication, or a signal-to-noise ratio (SNR) associated with the first uplink communication.
5. 5 . The UE of claim 1 , wherein the indication of the frequency offset of the first uplink communication comprises one or more of: an explicit indication of the frequency offset, or an indication of a selection of the frequency offset from a set of candidate frequency offsets.
6. 6 . The UE of claim 5 , wherein the set of candidate frequency offsets have a granularity that is based at least in part on one or more of: a number of bits allocated for the indication of the frequency offset of the first uplink communication, a number of multiple-input multiple-output (MIMO) layers of one or more of the first uplink communication or the second uplink communication, subcarrier spacing of the first uplink communication or the second uplink communication, or a signal-to-noise ratio (SNR) associated with the first uplink communication.
7. 7 . The UE of claim 6 , wherein the one or more processors are further configured to transmit an indication of support for one or more of: adjust a frequency offset correction based at least in part on reception of the indication of the frequency offset of the first uplink communication, or transmit communications using different frequency offset corrections for transmitted communications and received communications, wherein receiving the indication of the frequency offset of the first uplink communication is based at least in part on transmitting the indication of support.
8. 8 . The UE of claim 1 , wherein the one or more processors are further configured to: receive a third communication using a third frequency offset correction, based at least in part on the third communication being a received communication, that is different from the second frequency offset correction, based at least in part on the second frequency offset correction being associated with a transmitted communication.
9. 9 . A UE for wireless communication, comprising: a memory; and one or more processors, coupled to the memory, configured to: receive a downlink communication using a downlink frequency offset correction based at least in part on the downlink communication being a received communication; transmit a first uplink communication having a first frequency offset correction applied; receive an indication of a frequency offset of the first uplink communication, wherein the indication is based at least in part on an average frequency offset of communications transmitted by the UE during a period of time; and transmit a second uplink communication using a second frequency offset correction that is different from the downlink frequency offset correction based at least in part on the first frequency offset correction and the frequency offset of the first uplink communication.
10. 10 . The UE of claim 9 , wherein the indication of the frequency offset of the downlink communication comprises: a UE-specific indication, or a group-specific indication.
11. 11 . The UE of claim 9 , wherein the one or more processors, to receive the indication of the frequency offset of the first uplink communication, are configured to receive the indication via one or more of: a periodic communication, an aperiodic communication, downlink control information (DCI), a communication that includes a timing advance indication, or a communication that includes an allocation for the second uplink communication.
12. 12 . The UE of claim 9 , wherein the one or more processors, to receive the indication of the frequency offset of the first uplink communication, are configured to receive the indication based at least in part on one or more of: a number of multiple-input multiple-output (MIMO) layers of one or more of the first uplink communication or the second uplink communication, subcarrier spacing of the downlink communication or the second uplink communication, or a signal-to-noise ratio (SNR) associated with the first uplink communication.
13. 13 . The UE of claim 9 , wherein the indication of the frequency offset of the first uplink communication comprises one or more of: an explicit indication of the frequency offset, or an indication of a selection of the frequency offset from a set of candidate frequency offsets.
14. 14 . The UE of claim 13 , wherein the set of candidate frequency offsets have a granularity that is based at least in part on one or more of: a number of bits allocated for the indication of the frequency offset of the first uplink communication, a number of multiple-input multiple-output (MIMO) layers of one or more of the first uplink communication or the second uplink communication, subcarrier spacing of a channel used for one or more of the first uplink communication or the second uplink communication, or a signal-to-noise ratio (SNR) associated with the first uplink communication.
15. 15 . The UE of claim 9 , wherein the one or more processors are further configured to transmit an indication of support for one or more of: adjust a frequency offset correction based at least in part on reception of the indication of the frequency offset of the first uplink communication, or transmit communications using different downlink frequency offset corrections for transmitted communications and received communications, wherein receiving the downlink communication using the downlink frequency offset correction and transmitting the second uplink communication using the second frequency offset correction is based at least in part on transmitting the indication of support.
16. 16 . A network node for wireless communication, comprising: a memory; and one or more processors, coupled to the memory, configured to: receive, from a user equipment (UE), a first uplink communication having a first frequency offset correction applied; transmit an indication of a frequency offset of the first uplink communication, wherein the indication is based at least in part on an average frequency offset of communications transmitted by the UE during a period of time; and receive a second uplink communication having a second frequency offset correction applied, the second frequency offset correction based at least in part on the first frequency offset correction and the frequency offset of the first uplink communication.
17. 17 . The network node of claim 16 , wherein the indication of the frequency offset of the first uplink communication comprises: a UE-specific indication, or a group-specific indication.
18. 18 . The network node of claim 16 , wherein the one or more processors, to transmit the indication of the frequency offset of the first uplink communication, are configured to transmit the indication via one or more of: a periodic communication, an aperiodic communication, downlink control information (DCI), a communication that includes a timing advance indication, or a communication that includes an allocation for the second uplink communication.
19. 19 . The network node of claim 16 , wherein the transmitting the indication of the frequency offset of the first uplink communication is based at least in part on one or more of: a number of multiple-input multiple-output (MIMO) layers of one or more of the first uplink communication or the second uplink communication, subcarrier spacing of the first uplink communication or the second uplink communication, or a signal-to-noise ratio (SNR) associated with the first uplink communication.
20. 20 . The network node of claim 16 , wherein the indication of the frequency offset of the first uplink communication comprises one or more of: an explicit indication of the frequency offset, or an indication of a selection of the frequency offset from a set of candidate frequency offsets.

Description

FIELD OF THE DISCLOSURE Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for frequency offset correction. BACKGROUND Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, or the like). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP). A wireless network may include one or more network nodes that support communication for wireless communication devices, such as a user equipment (UE) or multiple UEs. A UE may communicate with a network node via downlink communications and uplink communications. “Downlink” (or “DL”) refers to a communication link from the network node to the UE, and “uplink” (or “UL”) refers to a communication link from the UE to the network node. Some wireless networks may support device-to-device communication, such as via a local link (e.g., a sidelink (SL), a wireless local area network (WLAN) link, and/or a wireless personal area network (WPAN) link, among other examples). The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate on a municipal, national, regional, and/or global level. New Radio (NR), which may be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the 3GPP. NR is designed to better support mobile broadband internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink, using CP-OFDM and/or single-carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink, as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful. SUMMARY Some aspects described herein relate to a method of wireless communication performed by a user equipment (UE). The method may include transmitting a first communication having a first frequency offset correction applied. The method may include receiving an indication of a frequency offset of the first communication. The method may include transmitting a second communication having a second frequency offset correction applied, the second frequency offset correction based at least in part on the first frequency offset correction and the frequency offset of the first communication. Some aspects described herein relate to a method of wireless communication performed by a UE. The method may include receiving a first communication using a first frequency offset correction based at least in part on the first communication being a received communication. The method may include transmitting a second communication using a second frequency offset correction that is different from the first frequency offset correction based at least in part on the second communication being a transmitted communication. Some aspects described herein relate to a method of wireless communication performed by a network node. The method may include receiving, from a UE, a first communication having a first frequency offset correction applied. The method may include transmitting an indication of a frequency offset of the first communication. The method may include receiving a second communication having a second frequency offset correction applied, the second frequency offset correction based at least in part on the first frequency offset correction and the frequency offset of the first communication. Some aspects described herein relate to a UE. The user equipment may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to transmit a first communication having a first frequency offset correction applied. The one or more processors may be configured to receive an indication of a frequency offse