公开(公告)号：US20230082795A1

公开(公告)日：2023-03-16

申请号：US17932274

申请日：2022-09-14

Applicant: Samsung Electronics Co., Ltd.

Inventor： Tiexing Wang ,  Yeqing Hu ,  Yang Li ,  Rui Wang ,  Junmo Sung ,  Jianzhong Zhang

IPC: H04L5/00 ,  H04L25/02 ,  H04L27/26

Abstract: A method includes storing multiple signals received from a user equipment (UE) in a queue. The method also includes estimating a sounding reference signal (SRS) signal-to-noise-ratio (SNR) and determining a filtered SNR based on the received signals. The method also includes computing one or more features based on the filtered SNR and at least some of the received signals in the queue. The method also includes determining (i) a channel condition of the UE and (ii) a speed range of the UE based on the one or more computed features, wherein the channel condition of the UE comprises line-of-sight (LoS) or non-line-of-sight (NLoS). The method also includes determining a transmission configuration based on the channel condition of the UE and the speed range of the UE.

公开(公告)号：US11516689B2

公开(公告)日：2022-11-29

申请号：US17129797

申请日：2020-12-21

Applicant: Samsung Electronics Co., Ltd.

Inventor： Yeqing Hu ,  Yang Li ,  Tiexing Wang ,  Junmo Sung ,  Rui Wang ,  Jianzhong Zhang

IPC: H04L12/00 ,  H04W24/10 ,  H04W24/08

Abstract: A method for operating a base station comprises receiving channel information from a plurality of UEs; determining, based on the channel information, one or more UEs on which to base a channel prediction; computing a first set of metrics and a second set of metrics corresponding to the plurality of UEs, wherein computing the first set of metrics has a lower complexity than computing the second set of metrics; performing a selection process on the plurality of UEs based on the first and second set of metrics associated with the plurality of UEs; selecting a first subset of UEs from the plurality of UEs based on a first set of metrics; selecting, from the first subset, a second subset of UEs based on a second set of metrics; and performing the channel prediction based on the second subset of UEs.

公开(公告)号：US20220271852A1

公开(公告)日：2022-08-25

申请号：US17481048

申请日：2021-09-21

Applicant: Samsung Electronics Co., Ltd.

Inventor： Yeqing Hu ,  Yang Li ,  Rui Wang ,  Junmo Sung ,  Tiexing Wang ,  Jianzhong Zhang

IPC: H04B17/391

Abstract: Methods and apparatuses for a BS in a communication system. The method comprises: identifying antenna groups; identifying channel coefficients for each of the antenna groups to perform a channel tracking and prediction operation; receiving, from a user equipment (UE), an uplink signal to perform the channel tracking and prediction operation; and performing, based at least in part on the received uplink signal, a channel coefficient tracking operation for the channel coefficients of the antenna groups, respectively, the channel coefficient tracking operation including a channel subspace parameter tracking operation and a subspace coefficient tracking operation.

公开(公告)号：US11290167B2

公开(公告)日：2022-03-29

申请号：US16796688

申请日：2020-02-20

Applicant: Samsung Electronics Co., Ltd.

Inventor： Yeqing Hu ,  Ahmed Atef Ibrahim ,  Jianzhong Zhang

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

Abstract: A base station, method, and computer-readable storage medium for channel state information (CSI) acquisition. The base station includes a transceiver configured to transmit a first, unprecoded channel state information reference signal (CSI-RS) on a first antenna dimension; receive a first CSI report on the first antenna dimension; transmit a second, precoded CSI-RS on a second antenna dimension; and receive a second CSI report on the second antenna dimension. The first CSI report includes a precoding matrix index (PMI), a rank indicator (RI), and channel quality indicator (CQI) for the first antenna dimension; and the second CSI report comprises a PMI, a RI, and a CQI for the second antenna dimension. The base station also includes a processor operably connected to the transceiver, the processor configured to generate a downlink (DL) CSI for multi-user multi-input, multi-output (MU-MIMO) scheduling and precoding based on the first CSI report and the second CSI report.

公开(公告)号：US20200304182A1

公开(公告)日：2020-09-24

申请号：US16802373

申请日：2020-02-26

Applicant: Samsung Electronics Co., Ltd.

Inventor： Ahmed Atef Ibrahim ,  Yeqing Hu ,  Young-Han Nam ,  Jianzhong Zhang

IPC: H04B7/0456 ,  H04B7/0452 ,  H04B7/10 ,  H04B7/0417

Abstract: A base station for generating multi-user precoders. The base station includes a transceiver configured to receive sounding reference signals (SRSs) from a set of user equipments (UEs), and a processor configured to select, for one or more UEs in the set of UEs, one or more codewords from an uplink codebook based on a correlation between the one or more codewords and the one or more SRSs; determine, using a composite downlink codebook, downlink codewords for the selected uplink codewords, respectively, the composite downlink codebook mapping uplink codewords to downlink codewords based on steering angles derived from the uplink codewords; transmit a set of pre-coded channel state information reference signals (CSI-RSs) to the one or more UEs, wherein the pre-coded CSI-RSs are pre-coded based on the determined downlink codewords; and identify a downlink channel matrix based on CSI feedback from the one or more UEs and the pre-coded CSI-RSs.

公开(公告)号：US20190277957A1

公开(公告)日：2019-09-12

申请号：US16270486

申请日：2019-02-07

Applicant: Samsung Electronics Co., Ltd.

Inventor： Vikram Chandrasekhar ,  Jianzhong Zhang ,  Saidhiraj Amuru ,  Yeqing Hu ,  Hao Chen

IPC: G01S11/10 ,  G06N20/00 ,  G06N3/08

Abstract: An apparatus for performing a wireless communication includes a communication interface configured to measure uplink (UL) Sounding Reference Signals (SRSs) transmitted from a mobile client device, and at least one processor configured to buffer a number of uplink (UL) SRS measurements derived from UL SRS transmissions of the mobile client device, the number of UL SRS measurements exceeding a threshold, extract features from UL SRS measurements, obtain a machine learning (ML) classifier for determining a category to be used for estimating mobility associated with the mobile client device, and determine the category of the mobile client device by applying the extracted features to the ML classifier. Methods and apparatus extract the features of either a set of power spectrum density measurements or a set of pre-processed frequency domain real and imaginary portions of UL SRS measurements and feed the features to an AI classifier for UE speed estimation.

公开(公告)号：US12250035B2

公开(公告)日：2025-03-11

申请号：US18365874

申请日：2023-08-04

Applicant: Samsung Electronics Co., Ltd.

Inventor： Yeqing Hu ,  Xiaowen Tian ,  Yang Li ,  Tiexing Wang ,  Jianzhong Zhang

IPC: H04B7/0456 ,  H04L25/02

Abstract: A method includes identifying ACF information by: obtaining channel information including multiple channels of expected operation scenarios; and based on the channel information for each of the channels, determining MMSE channel estimation (CE) weights expressed in a form of ACFs and an SNR, and covariance matrices. The method includes clustering the MMSE CE weights into K clusters. A center ACF weight of each of the K clusters represents a codeword. The method includes determining a distance metric based on a cluster distance after a re-clustering. The method includes, in response to a determination that cluster distances before and after the clustering differ from each other by a non-negligibly, iteratively re-clustering the ACF information thereby updating the center ACF weights and cluster distances. The method includes generating the codebook to include an index k of each of the K clusters and the center ACF weight of each of the K clusters.

公开(公告)号：US20240187055A1

公开(公告)日：2024-06-06

申请号：US18484293

申请日：2023-10-10

Applicant: Samsung Electronics Co., Ltd.

Inventor： Thuy Van Nguyen ,  Yang Li ,  Yeqing Hu ,  R A Nadisanka Perera Rupasinghe ,  Jianzhong Zhang

IPC: H04B7/0456 ,  H04L1/1812 ,  H04W72/23

CPC classification number: H04B7/0486 ,  H04L1/1812 ,  H04W72/23

Abstract: A network entity includes a memory and a processor operable coupled to the memory. The processor is configured to determine a hybrid joint transmission (Hybrid-JT) signal for transmission from a wireless network associated with the network entity to a user equipment (UE). The Hybrid-JT signal includes a diversity joint transmission (Div-JT) component and a multiplexing joint transmission (Mux-JT) component. The processor is further configured to instruct the wireless network to transmit the Hybrid-JT signal to the UE.

公开(公告)号：US11683712B2

公开(公告)日：2023-06-20

申请号：US17348621

申请日：2021-06-15

Applicant: Samsung Electronics Co., Ltd.

Inventor： Rui Wang ,  Yang Li ,  Junmo Sung ,  Yeqing Hu ,  Jianzhong Zhang

IPC: H04W24/10 ,  H04L5/00 ,  H04B17/373

CPC classification number: H04W24/10 ,  H04B17/373 ,  H04L5/0053

Abstract: Methods and apparatuses for hybrid hierarchical parameter tracking for CSI estimation in a wireless communication system. The methods and apparatuses include receiving uplink signals comprising a channel state information (CSI) report or a sounding reference signal (SRS); performing a channel parameter tracking operation to determine channel parameters that change less than a first threshold amount based on the received uplink signals; performing a channel parameter prediction operation to determine the channel parameters that change greater than a second threshold amount on an output of the channel parameter tracking operation; and performing a channel prediction operation for downlink channels based on an output of the channel parameter tracking operation and the channel parameter prediction operation.

公开(公告)号：US20220022079A1

公开(公告)日：2022-01-20

申请号：US17348621

申请日：2021-06-15

Applicant: Samsung Electronics Co., Ltd.

Inventor： Rui Wang ,  Yang Li ,  Junmo Sung ,  Yeqing Hu ,  Jianzhong Zhang

IPC: H04W24/10 ,  H04B17/373 ,  H04L5/00

Abstract: Methods and apparatuses for hybrid hierarchical parameter tracking for CSI estimation in a wireless communication system. The methods and apparatuses include receiving uplink signals comprising a channel state information (CSI) report or a sounding reference signal (SRS); performing a channel parameter tracking operation to determine channel parameters that change less than a first threshold amount based on the received uplink signals; performing a channel parameter prediction operation to determine the channel parameters that change greater than a second threshold amount on an output of the channel parameter tracking operation; and performing a channel prediction operation for downlink channels based on an output of the channel parameter tracking operation and the channel parameter prediction operation.