公开(公告)号：US20210359731A1

公开(公告)日：2021-11-18

申请号：US17246374

申请日：2021-04-30

Applicant: QUALCOMM Incorporated

Inventor： Saeid Sahraei ,  Gokul Sridharan ,  Shimman Arvind Patel ,  Krishna Kiran Mukkavilli ,  June Namgoong ,  Taesang Yoo ,  Renqiu Wang

IPC: H04B7/0456 ,  H04B7/06 ,  H04W72/14

Abstract: Methods, systems, and devices for wireless communications are described in which a base station may identify a null space matrix that lies within a null space of an effective channel matrix for communications between the base station and a user equipment (UE). An indication of the null space matrix may be provided to the UE, and the null space matrix used to determine modifications to a precoding matrix. The base station and UE may determine a redistribution matrix that provides a reduced variance of transmission powers for a number of transmission channels, where a product of the null space matrix and the redistribution matrix may be computed and added to the precoding matrix to generate a modified precoding matrix. The modified precoding matrix may be used to generate the communications from the base station and UE with reduced power variance across channels.

公开(公告)号：US20250038791A1

公开(公告)日：2025-01-30

申请号：US18716854

申请日：2022-02-25

Applicant: QUALCOMM INCORPORATED

Inventor： Saeid Sahraei ,  Yu Zhang ,  Krishna Kiran Mukkavilli ,  Peter Gaal ,  Wanshi Chen ,  Tingfang Ji ,  Hung Dinh Ly

IPC: H04B7/04 ,  H04B7/06 ,  H04L5/00 ,  H04W74/0833

Abstract: Methods, systems, and devices for wireless communications are described. The method includes a reconfigurable intelligent surface receiving, from a network entity, a synchronization signal block associated with a synchronization signal block index, reflecting the synchronization signal block as a set of multiple instances of the synchronization signal block via a corresponding set of multiple downlink transmit beams, receiving a random access message from a user equipment (UE) during a random access occasion that corresponds with the synchronization signal block index and on an uplink receive beam that corresponds with one of the set of multiple downlink transmit beams, identifying the phase-change pattern of multiple phase-change patterns that corresponds to the uplink receive beam, and reflecting the random access message to the network entity by applying the phase-change pattern to antenna elements of the reconfigurable intelligent surface that reflect the random access message to the network entity.

公开(公告)号：US20250016840A1

公开(公告)日：2025-01-09

申请号：US18707048

申请日：2022-01-20

Applicant: QUALCOMM INCORPORATED

Inventor： Saeid Sahraei ,  Yu Zhang ,  Hung Dinh Ly ,  Peter Gaal ,  Krishna Kiran Mukkavilli

IPC: H04W74/0833 ,  H04B7/06 ,  H04W72/0453

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) and a base station may participate in a one-shot initial access procedure involving a reconfigurable intelligent surface (RIS) divided into a number of sub-RISs, each sub-RIS associated with a different configuration for reflecting signaling from the base station. In some aspects, the base station may configure each sub-RIS to have a different frequency shift and transmit, to the UE, a parameter indicating a quantity of synchronization rasters associated with each of a set of beams that the base station may use as part of the one-shot initial access procedure. The UE may, for each beam, monitor a quantity of monitoring occasions corresponding to the quantity of synchronization rasters and transmit random access signaling to the base station based on which synchronization raster of which beam provides a greatest signal strength at the UE.

公开(公告)号：US20250007566A1

公开(公告)日：2025-01-02

申请号：US18705962

申请日：2021-12-10

Applicant: QUALCOMM INCORPORATED

Inventor： Saeid Sahraei ,  Krishna Kiran Mukkavilli ,  Yu Zhang ,  Hung Dinh Ly

IPC: H04B7/04 ,  H04B7/06

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a base station may communicate with a user equipment (UE) via a reconfigurable intelligent surface (RIS) which is capable of adjusting a reflection characteristic to reflect incident signaling in different directions. The base station and the RIS may establish a beamformed connection and, in some scenarios, the base station and the RIS may experience a beam failure. In such scenarios, the base station, the UE, and the RIS may participate in a two-step beam training procedure to reduce an amount of possible beam pair hypotheses that the communicating devices test in order to re-establish communication between the base station and the UE via the RIS. The two-step beam training procedure may include a first procedure in which the RIS selects a suitable beam toward the base station and a second procedure that leverages the selected beam.

公开(公告)号：US20240187078A1

公开(公告)日：2024-06-06

申请号：US18552027

申请日：2021-05-10

Applicant: QUALCOMM Incorporated

Inventor： Peter Gaal ,  Saeid Sahraei ,  Yu Zhang ,  Hung Dinh Ly ,  Krishna Kiran Mukkavilli

IPC: H04B7/06 ,  H04B7/04

CPC classification number: H04B7/06952 ,  H04B7/04013

Abstract: Aspects of the disclosure relate to beam sweeping with controllable reflective surfaces in the presence of co-located base stations of different network operators. A first base station that is co-located at a site with a second base station may perform a first beam sweep. The first beam sweep includes transmitting a plurality of directional beams. The first base station further transmits a control signal to a controllable reflective surface to control the controllable reflective surface to reduce a likelihood of a redirection of a directional beam of a potential second beam sweep by the second base station towards a user equipment associated with the second base station. Other aspects, embodiments, and features are also claimed and described.

公开(公告)号：US20240171442A1

公开(公告)日：2024-05-23

申请号：US18427261

申请日：2024-01-30

Applicant: QUALCOMM Incorporated

Inventor： Hung Dinh Ly ,  Saeid Sahraei ,  Gokul Sridharan ,  Krishna Kiran Mukkavilli

IPC: H04L27/26 ,  H04L5/00 ,  H04W52/24 ,  H04W52/52 ,  H04W52/54 ,  H04W72/0453 ,  H04W72/23

CPC classification number: H04L27/2618 ,  H04L5/0092 ,  H04W52/247 ,  H04W52/52 ,  H04W52/54 ,  H04W72/0453 ,  H04W72/23

Abstract: Aspects of the disclosure relate to techniques for peak-to-average power ratio (PAPR) reduction based on a tone reservation (TR) algorithm. For a TR algorithm, a suitable subset of tones from among a full set of tones in a given resource allocation are reserved for use as peak reduction tones (PRT). An apparatus such as a transmission/reception point receives a set of one or more PRT sequences and stores them in memory. The transmission/reception point then determines a set of PRTs based on one or more later-received PRT sequence selection parameters. Other aspects, embodiments, and features are also claimed and described.

公开(公告)号：US11916718B2

公开(公告)日：2024-02-27

申请号：US17933467

申请日：2022-09-19

Applicant: QUALCOMM Incorporated

Inventor： Gokul Sridharan ,  Saeid Sahraei ,  June Namgoong ,  Peter Gaal ,  Krishna Kiran Mukkavilli ,  Tingfang Ji ,  Wei Yang

IPC: H04L27/26 ,  H04B1/71 ,  H04L25/03 ,  H04W72/0453

CPC classification number: H04L27/2623 ,  H04B1/7102 ,  H04L25/0384 ,  H04W72/0453 ,  H04B2201/70706

Abstract: Techniques for peak-to-average power ratio (PAPR) reduction are described. Wireless devices may use one or more PAPR shaping resources, such as expanded bandwidth and/or pulse-shaping filtering, for shaping a signal to reduce PAPR. For example, expanded bandwidth may be utilized for adding a cyclic affix (CA), such as may comprise a cyclic prefix (CP), cyclic suffix (CS), etc., and combinations thereof, to a frequency domain data signal to provide a CP augmented frequency domain data signal used to generate a reduced PAPR time domain data signal. Additionally or alternatively, pulse-shaping filtering may be applied to a frequency domain signal to provide a pulse-shaped frequency domain data signal used to generate a reduced PAPR time domain data signal. Other aspects and features are also claimed and described.

公开(公告)号：US11777777B2

公开(公告)日：2023-10-03

申请号：US17443908

申请日：2021-07-28

Applicant: QUALCOMM Incorporated

Inventor： Hung Dinh Ly ,  Saeid Sahraei ,  Wei Yang ,  Krishna Kiran Mukkavilli ,  Gokul Sridharan

IPC: H04L27/26 ,  H04W72/04 ,  H04W80/02 ,  H04W72/044 ,  H04W72/23

CPC classification number: H04L27/2614 ,  H04W72/044 ,  H04W72/23 ,  H04W80/02

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may switch from a first bandwidth part to a second bandwidth part; and transmit a signal including one or more peak reduction tones (PRTs) in one or more locations defined by a PRT allocation for the second bandwidth part. Numerous other aspects are provided.

公开(公告)号：US11750431B2

公开(公告)日：2023-09-05

申请号：US17305274

申请日：2021-07-02

Applicant: QUALCOMM Incorporated

Inventor： Hung Dinh Ly ,  Saeid Sahraei ,  Muhammad Sayed Khairy Abdelghaffar ,  Renqiu Wang ,  Krishna Kiran Mukkavilli

IPC: H04L27/26 ,  H04L5/00 ,  H04L5/14

CPC classification number: H04L27/2614 ,  H04L5/0012 ,  H04L27/2607 ,  H04L5/1423

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, information indicating at least one of a first set of peak reduction tones (PRTs) for uplink communication, or a second set of PRTs for downlink communication, for use in a full-duplex communication mode. The first set of PRTs and the second set of PRTs may share at least one PRT. The UE may transmit, to the base station, or receive, from the base station, at least one signal based at least in part on the at least one of the first set of PRTs or the second set of PRTs. Numerous other aspects are provided.

公开(公告)号：US11743086B2

公开(公告)日：2023-08-29

申请号：US17306755

申请日：2021-05-03

Applicant: QUALCOMM Incorporated

Inventor： Saeid Sahraei ,  Gokul Sridharan ,  Hung Dinh Ly ,  June Namgoong ,  Krishna Kiran Mukkavilli ,  Naga Bhushan ,  Tingfang Ji ,  Peter Gaal ,  Taesang Yoo ,  Shimman Arvind Patel

IPC: H04L27/26 ,  H04W72/0453

CPC classification number: H04L27/2614 ,  H04W72/0453

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive a resource allocation indicating a plurality of transmission tones comprising a subset of data tones of a plurality of data tones and a subset of peak reduction tones (PRTs) of a plurality of PRTs, wherein the resource allocation indicates a plurality of data tone locations and a plurality of PRT locations within a particular bandwidth, wherein a subset of PRT locations of the plurality of PRT locations are arranged relative to a subset of data tone locations of the plurality of data tone locations according to a PRT sequence corresponding to a set of allocated frequency resources; and transmit a data transmission using a waveform based at least in part on the resource allocation. Numerous other aspects are provided.