公开(公告)号：US11799525B2

公开(公告)日：2023-10-24

申请号：US17250896

申请日：2019-09-26

Applicant: QUALCOMM Incorporated

Inventor： Bo Chen ,  Pavan Kumar Vitthaladevuni ,  Yu Zhang ,  Ruifeng Ma ,  Joseph Binamira Soriaga ,  Tingfang Ji

IPC: H04B7/04 ,  H04B7/0456 ,  H04B7/0408

CPC classification number: H04B7/0478 ,  H04B7/0408

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine channel state information for a communication link, wherein the channel state information is based at least in part on a linear combination associated with a plurality of beams of the communication link, wherein a first set of beams used for a first subband, of a plurality of subbands of the communication link, is different than a second set of beams used for a second subband of the plurality of subbands, and wherein the plurality of beams includes the first set of beams and the second set of beams; and transmit the channel state information. Numerous other aspects are provided.

公开(公告)号：US11632208B2

公开(公告)日：2023-04-18

申请号：US16078434

申请日：2017-02-17

Applicant: QUALCOMM Incorporated

Inventor： Bo Chen ,  Chao Wei ,  Liangming Wu ,  Neng Wang

IPC: H04B7/0417 ,  H04L5/00 ,  H04B7/06 ,  H04B7/0413 ,  H04W24/08 ,  H04W24/10

Abstract: Channel covariance feedback is disclosed for enhanced full-dimension multiple input, multiple output (eFD-MIMO) systems. Channel state information (CSI) reference signal (CSI-RS) feedback operations are implemented using spatial covariance feedback of a covariance estimate. After obtaining a set of orthogonal basis vectors, a user equipment (UE) measures the CSI-RS from a base station and determines the spatial covariance matrix from the signal. The UE may then compress the spatial covariance matrix into a lower-dimension covariance estimate matrix using the orthogonal basis vectors. The lower-dimension matrix along with element-wise quantization allows for feedback of spatial covariance for eFD-MIMO systems without excessive feedback overhead.

公开(公告)号：US11177862B2

公开(公告)日：2021-11-16

申请号：US16088285

申请日：2017-05-10

Applicant: QUALCOMM Incorporated ,  Chao Wei ,  Yu Zhang ,  Bo Chen ,  Jilei Hou

Inventor： Chao Wei ,  Yu Zhang ,  Bo Chen ,  Jilei Hou

IPC: H04W4/00 ,  H04B7/0452 ,  H04B7/0417 ,  H04B7/0456 ,  H04B7/06 ,  H04L5/00

Abstract: A hybrid class B channel state information (CSI) reference signal (CSI-RS) scheme is discussed which configures one cell-common beamformed CSI-RS resource for beam tracking and another UE-specific beamformed CSI-RS resource for CSI feedback. The cell-common beamformed CSI-RS resource may be transmitted at a longer periodicity and shared by user equipments (UEs) in the cell. The beamforming may be cycled over a set of predefined weights transparent to UE. The UE-specific beamformed CSI-RS may be transmitted at a shorter periodicity and can be activated dynamically to allow resource sharing among multiple UEs. The UEs will report a CSI for the cell-common beamformed CSI-RS resource which provides a quality indicator for the associated cell-common beam and is utilized by the base station to determine the precoding weight for the UE-specific beamformed CSI-RS resource. Both resources can be configured with different parameter sets, such as number of ports, codebook type, and CSI reporting parameters.

公开(公告)号：US12250675B2

公开(公告)日：2025-03-11

申请号：US17768539

申请日：2019-11-01

Applicant: Qualcomm Incorporated ,  Chenxi Hao ,  Yiqing Cao ,  Bo Chen ,  Peter Gaal ,  Hao Xu

Inventor： Chenxi Hao ,  Yiqing Cao ,  Bo Chen ,  Peter Gaal ,  Hao Xu

IPC: H04W72/12 ,  H04W72/1268

Abstract: Methods, systems, and devices for wireless communications are described. In some cases, a user equipment (UE) may In support multiple component carriers that may be used to transmit uplink transmissions. One carrier may be used at a time such that the may switch between the carriers based on an uplink transmission schedule. In some cases, switching may be limited by a consecutive uplink switching rule or UE capability. In some cases, the gap between two consecutive uplink carrier switching operations may be limited to a resource (e.g., slot, symbol), such that the UE may expect to perform at most one switching operation per resource. In some implementations, the gap between two consecutive uplink carrier switching operations may be limited to a duration (e. g., 14 symbols, 4 symbols), such that the UE may expect to perform at most one switching operation per a duration less than or equal to a threshold.

公开(公告)号：US11546029B2

公开(公告)日：2023-01-03

申请号：US17310312

申请日：2020-01-28

Applicant: Qualcomm Incorporated

Inventor： Joseph Binamira Soriaga ,  Pavan Kumar Vitthaladevuni ,  Bo Chen ,  Ruifeng Ma ,  Yu Zhang ,  Alexandros Manolakos ,  Tingfang Ji

IPC: H04B7/0456 ,  H04B7/06 ,  H04L1/00 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. Techniques described herein provide for a user equipment (UE) receiving a set of downlink reference signals associated with a downlink channel. In some cases, the set of downlink reference signals may include a channel state information reference signals (CSI-RS). The UE may calculate a transmission rank and a channel quality based on the received set of downlink reference signals. In some cases, the indication of the transmission rank may include a rank indication (RI), and the indication of the channel quality includes a channel quality indicator (CQI). The UE may then transmit the indications of the transmission rank and the channel quality using an uplink control channel, and may transmit an indication of a remaining channel state feedback using a precoded uplink reference signal.

公开(公告)号：US11075679B2

公开(公告)日：2021-07-27

申请号：US16305591

申请日：2017-06-22

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Wanshi Chen ,  Peter Gaal ,  Bo Chen

IPC: H04B7/06 ,  H04L5/00 ,  H04J13/00

Abstract: Mapping with CSI-RS resources with a code divisional multiplex (CDM) length of eight is disclosed. Such mapping allows for flexibly configuring the set of resource elements (REs) for mapping based on the available CSI-RS resources.

公开(公告)号：US20140056239A1

公开(公告)日：2014-02-27

申请号：US13882246

申请日：2010-12-01

Applicant: QUALCOMM Incorporated

Inventor： Jainqiang Zhang ,  Jiming Guo ,  Mingxi Fan ,  Bo Chen

IPC: H04W52/24 ,  H04W72/12

CPC classification number: H04W52/242 ,  H04L1/0007 ,  H04W52/146 ,  H04W52/286 ,  H04W72/1205 ,  H04W72/1268

Abstract: Certain aspects of the present disclosure propose techniques for power control for high-efficiency scheduling for Time Division Synchronous Code Division Multiple Access (TD-SCDMA) High Speed Uplink Packet Access (HSUPA). The basic principle of this power control for a scheduled Enhanced Dedicated Channel (E-DCH) Physical Uplink Channel (E-PUCH) is that all information for a transport block size (TBS) decision is made available at a user equipment (UE). Certain aspects provide a method for wireless communications. The method generally includes receiving, from a UE, an uplink signal, determining a reference uplink power level based on a filtered interference power of the received signal, and transmitting an indication of the reference uplink power level to the UE.

Abstract translation: 本公开的某些方面提出了用于时分同步码分多址（TD-SCDMA）高速上行链路分组接入（HSUPA）的高效率调度的功率控制技术。 用于调度的增强型专用信道（E-DCH）物理上行链路信道（E-PUCH）的该功率控制的基本原理是在用户设备（UE）处使得用于传输块大小（TBS）决策的所有信息都可用。 某些方面提供无线通信的方法。 该方法通常包括从UE接收上行链路信号，基于所接收信号的滤波干扰功率确定参考上行链路功率电平，并向UE发送参考上行链路功率电平的指示。