公开(公告)号：US12137017B2

公开(公告)日：2024-11-05

申请号：US17727378

申请日：2022-04-22

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Ahmed Abdelaziz Ibrahim Abdelaziz Zewail ,  Zhifei Fan ,  Tianyang Bai ,  Tao Luo ,  Jing Sun

IPC: H04L27/26 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. A device may precode a phase tracking reference signal (PTRS) sequence by applying a single discrete Fourier transform (DFT) to the PTRS sequence. The device may map the DFT precoded PTRS sequence to a subset of resources of a set of resources, and may transmit a signal carrying the DFT precoded PTRS sequence. Additionally or alternatively, the device may receive a signal that includes a DFT precoded PTRS sequence, demap the DFT precoded PTRS sequence to a subset of resources of a set of resources, decode the DFT precoded PTRS by applying a single inverse DFT (IDFT) to the DFT precoded PTRS sequence, estimate a phase error based on the decoding, and apply a phase error correction to a set of additional symbols associated with the signal based on the estimated phase error.

公开(公告)号：US12075384B2

公开(公告)日：2024-08-27

申请号：US17375944

申请日：2021-07-14

Applicant: QUALCOMM Incorporated

Inventor： Jun Ma ,  Xiaoxia Zhang ,  Qiang Wu ,  Tao Luo ,  Iyab Issam Sakhnini ,  Mehmet Izzet Gurelli ,  Ahmed Abdelaziz Ibrahim Abdelaziz Zewail ,  Jing Sun ,  Wooseok Nam ,  Anantha Krishna Karthik Nagarajan ,  Peter Gaal ,  Zhifei Fan ,  Juan Montojo ,  Sony Akkarakaran ,  Arumugam Chendamarai Kannan

IPC: H04W72/02 ,  H04L5/00 ,  H04L27/26 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/23

CPC classification number: H04W72/02 ,  H04L5/0051 ,  H04L27/26025 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/23

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a base station, a first tracking reference signal configuration and a second tracking reference signal configuration. The first tracking reference signal configuration may include a first set of parameters and the second tracking reference signal configuration may include a second set of parameters. The UE, the base station, or both may identify an indicator for selection from among the first tracking reference signal configuration and the second tracking reference signal configuration. The UE may receive, from the base station and based on the identified indicator for selection, a tracking reference signal in accordance with the first tracking reference signal configuration or the second tracking reference signal configuration.

公开(公告)号：US12010049B2

公开(公告)日：2024-06-11

申请号：US17133537

申请日：2020-12-23

Applicant: QUALCOMM Incorporated

Inventor： Iyab Issam Sakhnini ,  Tao Luo ,  Juan Montojo ,  Xiaoxia Zhang ,  Jun Ma ,  Zhifei Fan

IPC: H04J11/00 ,  H04L5/00 ,  H04W56/00

CPC classification number: H04L5/0037 ,  H04J11/0073 ,  H04W56/0035 ,  H04J2011/0096

Abstract: Methods, systems, and devices for wireless communications are described. A wireless device may monitor for a transmission of a synchronization signal block that includes a first portion generated using a first waveform type and a second portion using a second waveform type that is different than the first waveform type. The wireless device may detect the first portion of the synchronization signal block based on the first waveform type used for the first portion. After detecting the first portion of the synchronization signal block, the wireless device may process the second portion of the synchronization signal block based on information obtained from the first portion of the synchronization signal block. The information obtained from the first portion of the synchronization signal block may include timing information, frequency information, or both.

公开(公告)号：US20240089055A1

公开(公告)日：2024-03-14

申请号：US17940355

申请日：2022-09-08

Applicant: QUALCOMM Incorporated

Inventor： Mostafa Khoshnevisan ,  Jing Sun ,  Rajat Prakash ,  Xiaoxia Zhang ,  Ahmed Abdelaziz Ibrahim Abdelaziz Zewail ,  Arumugam Chendamarai Kannan ,  Zhifei Fan

IPC: H04L5/00

CPC classification number: H04L5/0051 ,  H04L5/0094 ,  H04L5/0007

Abstract: Disclosed is a method of wireless communication. The method is performed at a user equipment (UE). The method comprises receiving, from a network entity, downlink control information (DCI) for a downlink transmission, wherein the downlink transmission is based on a rate-splitting multiple access scheme, and wherein the downlink transmission comprises a common stream, a demodulation reference signal (DM-RS) for the common stream, a private stream and a DM-RS for the private stream, determining, based on the DCI, a DM-RS configuration for the DM-RS for the common stream and for the DM-RS for the private stream, and receiving, based on the DM-RS configuration, the downlink transmission.

公开(公告)号：US11870626B1

公开(公告)日：2024-01-09

申请号：US17872984

申请日：2022-07-25

Applicant: QUALCOMM Incorporated

Inventor： Jing Jiang ,  Jing Sun ,  Seyedkianoush Hosseini ,  Zhifei Fan ,  Yu Zhang

IPC: H04L27/26 ,  H04W72/0453 ,  H04L5/00

CPC classification number: H04L27/26025 ,  H04L5/005 ,  H04L27/265 ,  H04W72/0453

Abstract: Methods, systems, and devices for wireless communications are described. A wireless device allocated two sets of non-contiguous frequency domain resources may divide a set of modulation symbols associated with a codeword into two subsets of modulation symbols. The wireless device may map the two subsets of modulation symbols into two sets of pre-discrete Fourier transform (DFT) resource elements (REs). The wireless device may pad the pre-DFT REs according to a block based scheme or a comb based scheme. The wireless device may perform a first DFT on the first set of pre-DFT REs and a second DFT on the second set of pre-DFT REs to generate first and second sets of frequency domain samples. The wireless device may perform an inverse fast Fourier transform on the first and second sets of frequency domain samples to generate a time domain waveform that may have a low peak to average power ratio.

公开(公告)号：US11792810B2

公开(公告)日：2023-10-17

申请号：US17159408

申请日：2021-01-27

Applicant: QUALCOMM Incorporated

Inventor： Zhifei Fan ,  Jing Sun ,  Xiaoxia Zhang ,  Tao Luo ,  Srinivas Yerramalli ,  Arumugam Chendamarai Kannan ,  Wooseok Nam ,  Sungwoo Park ,  Ahmed Abdelaziz Ibrahim Abdelaziz Zewail ,  Akula Aneesh Reddy

IPC: H04W72/10 ,  H04L5/00 ,  H04W72/23

CPC classification number: H04W72/23 ,  H04L5/0048

Abstract: In an aspect, a PDCCH and a PDSCH are transmitted by a BS to a UE, whereby the PDCCH includes a first DCI part and the PDSCH includes a second DCI part (e.g., a 2-part DCI). In an example, the BS and UE each determine at least one timing value associated with an effective receive time for the PDCCH based upon a reference symbol of the PDSCH.

公开(公告)号：US11777677B2

公开(公告)日：2023-10-03

申请号：US17308704

申请日：2021-05-05

Applicant: QUALCOMM Incorporated

Inventor： Tianyang Bai ,  Xiaoxia Zhang ,  Zhifei Fan ,  Tao Luo ,  Ahmed Abdelaziz Ibrahim Abdelaziz Zewail ,  Jing Sun ,  Juergen Cezanne ,  Junyi Li

IPC: H04W4/00 ,  H04L5/00 ,  H04W72/0453

CPC classification number: H04L5/0048 ,  H04W72/0453

Abstract: Aspects described herein relate to transmitting or receiving a demodulation reference signal (DMRS) for an antenna port over a set of multiple DMRS frequency tones in a symbol of a slot based on a DMRS configuration, and transmitting or receiving a phase tracking reference signal (PTRS) for the antenna port over a cluster of multiple PTRS frequency tones in the symbol or a different symbol of the slot, wherein the cluster of multiple PTRS frequency tones are adjacent to one another in frequency, and wherein at least one PTRS frequency tone in the cluster of multiple PTRS frequency tones is a non-zero power (NZP) PTRS frequency tone that overlaps, in frequency, at least one DMRS frequency tone in the set of DMRS frequency tones.

公开(公告)号：US11722910B2

公开(公告)日：2023-08-08

申请号：US17302263

申请日：2021-04-28

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Zhifei Fan ,  Jing Sun ,  Andrei Dragos Radulescu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W16/26 ,  H04W74/08

CPC classification number: H04W16/26 ,  H04W74/0833

Abstract: Wireless communications systems and methods related to on-demand cell coverage extension for broadcast signals are provided. A first wireless communication device communicates, with a second wireless communication device, a first extended cell coverage request. The first wireless communication device communicates, with the second wireless communication device, a first broadcast communication signal in an extended cell coverage mode in response to the first extended cell coverage request. The first broadcast communication signal includes a system information block repeated in at least one of a time domain or a frequency domain.

公开(公告)号：US11695530B2

公开(公告)日：2023-07-04

申请号：US17150910

申请日：2021-01-15

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Abdelaziz Ibrahim Abdelaziz Zewail ,  Zhifei Fan ,  Xiaoxia Zhang ,  Jing Sun ,  Tao Luo ,  Wooseok Nam ,  Qingjiang Tian

IPC: H04L5/00 ,  H04W72/02 ,  H04W72/23

CPC classification number: H04L5/0053 ,  H04W72/23

Abstract: This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for DMRS design for DFT-s-OFDM with increased subcarrier spacing. A UE may receive an assignment to transmit on a set of RBs. The set of RBs may be contiguous within a carrier that includes greater than 110 RBs. The UE may transmit DMRS on each RE of one or more adjacent symbols of the set of RBs.

公开(公告)号：US11632272B1

公开(公告)日：2023-04-18

申请号：US17706026

申请日：2022-03-28

Applicant: QUALCOMM Incorporated

Inventor： Raviteja Patchava ,  Jun Ma ,  Morteza Soltani ,  Jing Sun ,  Xiaoxia Zhang ,  Zhifei Fan ,  Ahmed Abdelaziz Ibrahim Abdelaziz Zewail

IPC: H04L25/02 ,  H04L27/26 ,  H04J13/00

Abstract: Methods, systems, and devices for wireless communications are described. A network entity may map a demodulation reference signal (DMRS), a truncated sequence, and data in a delay-Doppler domain in accordance with a control signal. The network entity may apply a Fourier transform on the mapped DMRS, the truncated sequence, and the data to generate a signal in the time domain. The network entity may output, and a user equipment (UE) may receive, the signal in the time domain, including the DMRS, the truncated sequence, and the data. The UE may apply a Fourier transform on the received signal in the time domain to generate a mapping of the DMRS and the data in the delay-Doppler domain. The UE may perform channel estimation based on applying the Fourier transform on the received signal.