IP Library › Granted Patent US 12689481
Granted Patent B2
US 12689481 · App. 18/433,183 · Granted Jul 21, 2026

Phase tracking reference signal configuration associated with user equipment phase noise suppression capability

Inventors: Aviv Regev (Tel Aviv, IL); Ronen Shaked (Kfar Saba, IL); Yaniv Eistein (Tel Aviv, IL)
Assignee: QUALCOMM Incorporated
H04L5/0051H04B15/00H04W8/22
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12689481
App. No.
18/433,183
Granted
Jul 21, 2026
Kind
B2
Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) with phase noise (PN) suppression capabilities may indicate, to a network node, a quantity of subcarriers corresponding to an assumed PN bandwidth (for example, a portion of a frequency spectrum in which the UE can estimate and cancel PN) and a residual error associated with the assumed PN bandwidth. In some aspects, the network node may then configure a phase tracking reference signal (PTRS) size (for example, a quantity and location of PTRS pilots) according to current the PN suppression capability of the UE. Furthermore, in cases where the UE changes the current PN suppression capability, the UE may indicate the updated PN suppression capability to the network node such that the PTRS size be appropriately updated for subsequent downlink transmissions.

Claims (44)

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

a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the UE to:

transmit, to a network node, information indicating a phase noise (PN) suppression capability;

receive, from the network node in accordance with the PN suppression capability, information indicating a phase tracking reference signal (PTRS) size configuration associated with one or more subcarriers dedicated to a PTRS;

receive, from the network node, a downlink transmission that includes a PTRS associated with the PTRS size configuration; and

perform, using the PTRS included in the downlink transmission, PN estimation and correction for the downlink transmission in accordance with the PN suppression capability and the PTRS size configuration.

2 . The UE of claim 1 , wherein the PN suppression capability includes a quantity of subcarriers corresponding to an assumed PN bandwidth.

3 . The UE of claim 2 , wherein the PN suppression capability includes a residual PN error associated with the quantity of subcarriers.

4 . The UE of claim 2 , wherein the PN suppression capability includes residual PN errors associated with different quantities of subcarriers over a frequency spectrum.

5 . The UE of claim 1 , wherein the processing system is further configured to cause the UE to:

obtain a PN mask over a frequency spectrum;

determine, in accordance with the PN mask, respective quantities of subcarriers associated with a subcarrier spacing and respective residual PN errors for a plurality of assumed PN bandwidths associated with the frequency spectrum; and

select, from the plurality of assumed PN bandwidths, an assumed PN bandwidth associated with the PN suppression capability.

6 . The UE of claim 5 , wherein the assumed PN bandwidth is selected in accordance with one or more hardware parameters or communication parameters.

7 . The UE of claim 1 , wherein the processing system is further configured to cause the UE to:

transmit, to the network node, information indicating a change to the PN suppression capability; and

receive, from the network node in accordance with the change to the PN suppression capability, information indicating an updated PTRS size configuration.

8 . The UE of claim 7 , wherein the processing system is further configured to cause the UE to:

receive, from the network node, a subsequent downlink transmission that includes a PTRS associated with the updated PTRS size configuration; and

perform, using the PTRS in the subsequent downlink transmission, PN estimation and correction for the subsequent downlink transmission in accordance with the change to the PN suppression capability and the updated PTRS size configuration.

9 . The UE of claim 7 , wherein the information indicating the change to the PN suppression capability indicates an upcoming slot in which the change to the PN suppression capability will be applied.

10 . The UE of claim 7 , wherein the change to the PN suppression capability is associated with a change to one or more of a battery state, a thermal state, a processor state, or a downlink communication state.

11 . A network node for wireless communication, comprising:

a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the network node to:

receive, from a user equipment (UE), information indicating a phase noise (PN) suppression capability associated with the UE;

transmit, to the UE in accordance with the PN suppression capability, information indicating a phase tracking reference signal (PTRS) size configuration associated with one or more subcarriers dedicated to a PTRS; and

transmit, to the UE, a downlink transmission that includes a PTRS associated with the PTRS size configuration.

12 . The network node of claim 11 , wherein the PN suppression capability includes a quantity of subcarriers corresponding to an assumed PN bandwidth.

13 . The network node of claim 12 , wherein the PN suppression capability includes a residual PN error associated with the quantity of subcarriers.

14 . The network node of claim 12 , wherein the PN suppression capability includes residual PN errors associated with different quantities of subcarriers over a frequency spectrum.

15 . The network node of claim 11 , wherein the processing system is further configured to cause the network node to:

receive, from the UE, information indicating a change to the PN suppression capability; and

transmit, to the UE in accordance with the change to the PN suppression capability, information indicating an updated PTRS size configuration.

16 . The network node of claim 15 , wherein the processing system is further configured to cause the network node to:

transmit, to the UE, a subsequent downlink transmission that includes a PTRS associated with the updated PTRS size configuration.

17 . The network node of claim 15 , wherein the information indicating the change to the PN suppression capability indicates an upcoming slot in which the change to the PN suppression capability will be applied.

18 . The network node of claim 11 , wherein the processing system is further configured to cause the network node to:

determine the PTRS size configuration associated with the PN suppression capability in accordance with one or more policies related to a PTRS configuration.

19 . A method for wireless communication by a user equipment (UE), comprising:

transmitting, to a network node, information indicating a phase noise (PN) suppression capability;

receiving, from the network node in accordance with the PN suppression capability, information indicating a phase tracking reference signal (PTRS) size configuration associated with one or more subcarriers dedicated to a PTRS;

receiving, from the network node, a downlink transmission that includes a PTRS associated with the PTRS size configuration; and

performing, using the PTRS included in the downlink transmission, PN estimation and correction for the downlink transmission in accordance with the PN suppression capability and the PTRS size configuration.

20 . The method of claim 19 , wherein the PN suppression capability includes a quantity of subcarriers and a residual PN error corresponding to an assumed PN bandwidth.