IP Library › Granted Patent US 12700978
Granted Patent B2
US 12700978 · App. 17/997,979 · Granted Aug 4, 2026

Doppler shift compensation

Inventors: Muhammad Sayed Khairy Abdelghaffar (San Jose, CA); Yu Zhang (San Diego, CA); Runxin Wang (San Diego, CA); Alexandros Manolakos (Escondido, CA)
Assignee: QUALCOMM Incorporated
H04L5/0091H04L5/0023H04L5/0048
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Quick Facts
Patent No.
US 12700978
App. No.
17/997,979
Granted
Aug 4, 2026
Kind
B2
Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive, based at least in part on transmitting information indicating a UE capability for uplink frequency shift configuration, quasi-co-location (QCL) information associated with an uplink transmission control indicator (TCI) state; determine an uplink frequency shift configuration for a sounding reference signal (SRS) based at least in part on the QCL information associated with the uplink TCI state; and transmit the SRS based at least in part on the uplink frequency shift configuration. Numerous other aspects are provided.

Claims (60)

1 . A method of wireless communication performed by a user equipment (UE), comprising:

receiving, based at least in part on the UE transmitting information indicating a UE capability for Doppler shift modulation, quasi-co-location (QCL) information associated with an uplink transmission control indicator (TCI) state; and

transmitting a sounding reference signal (SRS) with or without Doppler shift modulation based on the QCL information.

2 . The method of claim 1 , further comprising:

determining a Doppler shift based at least in part on a downlink reference signal that is a source reference signal of the QCL information or the uplink TCI state.

3 . The method of claim 1 , further comprising:

transmitting the information indicating the UE capability for Doppler shift modulation in connection with a downlink Doppler shift.

4 . The method of claim 1 , further comprising:

receiving a downlink shared channel message that is downlink Doppler shift pre-compensated in connection with the SRS.

5 . The method of claim 1 , wherein the UE is configured to map the SRS to a single received tracking reference signal.

6 . The method of claim 1 , wherein the UE is configured to map the SRS to a plurality of received tracking reference signals.

7 . The method of claim 1 , wherein the QCL information indicates at least one of QCL type-A, type-B, or type-C; and

wherein transmitting the SRS with or without Doppler shift modulation based on the QCL information comprises transmitting the SRS without the Doppler shift modulation.

8 . The method of claim 1 , wherein the QCL information indicates QCL not associated with a Doppler shift or spread; and

wherein transmitting the SRS with or without Doppler shift modulation based on the QCL information comprises transmitting the SRS with the Doppler shift modulation.

9 . The method of claim 1 , wherein the SRS is an aperiodic SRS and the uplink TCI state is based at least in part on an uplink TCI codepoint indicated in downlink control information.

10 . The method of claim 1 , wherein the SRS is a semi-persistent SRS and the uplink TCI state is based at least in part on an uplink TCI codepoint indicated in a medium access control control element.

11 . The method of claim 1 , wherein the SRS is a periodic SRS and the uplink TCI state is based at least in part on radio resource control (RRC) configuration.

12 . The method of claim 1 , wherein the QCL information is based at least in part on a received channel state information reference signal.

13 . The method of claim 1 , wherein the QCL information is configured on a per transmit-receive-point basis.

14 . The method of claim 1 , wherein the QCL information is configured on a per antenna panel basis.

15 . The method of claim 1 , wherein the QCL information is configured on a per symbol basis.

16 . The method of claim 1 , wherein the QCL information is configured on a per symbol group basis.

17 . A user equipment (UE) for wireless communication, comprising:

memory; and

a transceiver; and

one or more processors coupled to the memory, the one or more processors configured to:

receive, via the transceiver and based at least in part on the UE transmitting information indicating a UE capability for Doppler shift modulation, quasi-co-location (QCL) information associated with an uplink transmission control indicator (TCI) state; and

transmit, via the transceiver, a sounding reference signal (SRS) with or without Doppler shift modulation based on the QCL information.

18 . The UE of claim 17 , wherein the one or more processors are further configured to:

determine a Doppler shift based at least in part on a downlink reference signal that is a source reference signal of the QCL information or the uplink TCI state.

19 . The UE of claim 17 , wherein the one or more processors are further configured to:

transmit, via the transceiver, the information indicating the UE capability for Doppler shift modulation in connection with a downlink Doppler shift.

20 . The UE of claim 17 , wherein the one or more processors are further configured to:

receive, via the transceiver, a downlink shared channel message that is downlink Doppler shift pre-compensated in connection with the SRS.

21 . The UE of claim 17 , wherein the one or more processors are further configured to:

map the SRS to a single received tracking reference signal.

22 . The UE of claim 17 , wherein the one or more processors are further configured to:

map the SRS to a plurality of received tracking reference signals.

23 . The UE of claim 17 , wherein the QCL information indicates at least one of QCL type-A, type-B, or type-C; and

wherein the one or more processors configured to transmit the SRS with or without Doppler shift modulation based on the QCL information comprises the UE configured to transmit the SRS without Doppler shift modulation.

24 . The UE of claim 17 , wherein the QCL information indicates QCL not associated with a Doppler shift or spread; and

wherein the one or more processors configured to transmit the SRS with or without Doppler shift modulation based on the QCL information comprises the UE configured to transmit the SRS with Doppler shift modulation.

25 . The UE of claim 17 , wherein the SRS is an aperiodic SRS and the uplink TCI state is based at least in part on an uplink TCI codepoint indicated in downlink control information.

26 . The UE of claim 17 , wherein the SRS is a semi-persistent SRS and the uplink TCI state is based at least in part on an uplink TCI codepoint indicated in a medium access control control element.

27 . The UE of claim 17 , wherein the SRS is a periodic SRS and the uplink TCI state is based at least in part on radio resource control (RRC) configuration.

28 . The UE of claim 17 , wherein the QCL information is based at least in part on a received channel state information reference signal.

29 . The UE of claim 17 , wherein the QCL information is configured on at least one of: a per transmit-receive-point basis, a per antenna panel basis, a per symbol basis, or a per symbol group basis.

30 . A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising:

one or more instructions that, when executed by one or more processors of a user equipment (UE), instruct the one or more processors to:

receive, based at least in part on the UE transmitting information indicating a UE capability for Doppler shift modulation, quasi-co-location (QCL) information associated with an uplink transmission control indicator (TCI) state; and

transmit a sounding reference signal (SRS) with or without Doppler shift modulation based on the QCL information.

31 . The non-transitory computer-readable medium of claim 30 , wherein the one or more instructions, when executed by the one or more processors, further instruct the one or more processors to determine a Doppler shift based at least in part on a downlink tracking reference signal that is a source reference signal of the QCL information or the uplink TCI state.

32 . The non-transitory computer-readable medium of claim 30 , wherein the one or more instructions, when executed by the one or more processors, further instruct the one or more processors to:

transmit the information indicating the UE capability for Doppler shift modulation in connection with a downlink Doppler shift.

33 . The non-transitory computer-readable medium of claim 30 , wherein the QCL information is configured on at least one of: a per transmit-receive-point basis, a per antenna panel basis, a per symbol basis, or a per symbol group basis.

34 . An apparatus for wireless communication, comprising:

means for receiving, based at least in part on the apparatus transmitting information indicating a capability for Doppler shift modulation, quasi-co-location (QCL) information associated with an uplink transmission control indicator (TCI) state; and

means for transmitting a sounding reference signal (SRS) with or without Doppler shift modulation based on the QCL information.

35 . The apparatus of claim 34 , further comprising means for determining a Doppler shift based at least in part on a downlink reference signal that is a source reference signal of the QCL information or the uplink TCI state.