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    Systems, methods, and apparatus for determining precoding information for beamforming
    3.
    发明授权
    Systems, methods, and apparatus for determining precoding information for beamforming 有权

    公开(公告)号：US12155429B2

    公开(公告)日：2024-11-26

    申请号：US17852358

    申请日：2022-06-28

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Qi Zhan ,  Jung Hyun Bae ,  Federico Penna ,  Hyukjoon Kwon ,  Dongwoon Bai

    IPC: H04B7/0456 ,  H04B7/06

    Abstract: A method may include determining, for a channel, a target component of precoding information, determining at least a part of the precoding information based on the target component and a decompressed component of the precoding information, and sending, from a user equipment, the at least a part of the precoding information. Determining the at least a part of the precoding information may be based on a correlation between the target component and the decompressed component. The at least a part of the precoding information may include a vector of coefficients. The vector of coefficients may include a vector of complex numbers. At least one of the complex numbers may include an amplitude representing a scaling coefficient and a phase representing a rotation coefficient. The target component may include a target matrix. The decompressed component may include a decompressed matrix. The target matrix may include a linear combination coefficients matrix. The precoding information may include a precoding matrix indicator.

    Low complexity algorithms for precoding matrix calculation
    6.
    发明授权
    Low complexity algorithms for precoding matrix calculation 有权

    公开(公告)号：US11190244B1

    公开(公告)日：2021-11-30

    申请号：US17031655

    申请日：2020-09-24

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Yanru Tang ,  Hongbing Cheng ,  Qi Zhan ,  Kee-Bong Song

    IPC: H04B7/02 ,  H04B7/0456

    Abstract: Low-complexity methods of calculating a precoding matrix for use in MIMO transmission. In some embodiments, a method of calculating a precoding matrix includes (i) calculating a first portion of a first singular value decomposition, based on a first portion of a channel matrix; (ii) calculating a second portion of a second singular value decomposition, based on a second portion of the channel matrix; (iii) calculating an intermediate matrix, based on: the first portion of the first singular value decomposition and the second portion of the second singular value decomposition; and (iv) calculating a matrix of approximate right singular vectors. The calculating of the matrix of approximate right singular vectors may include calculating a product of factors, the factors including a first factor based on the conjugate transpose of the intermediate matrix, a second factor based on a unitary matrix, and a third factor based on a diagonal matrix.

    System and method for generating codebook for analog beamforming
    8.
    发明授权
    System and method for generating codebook for analog beamforming 有权

    公开(公告)号：US10742282B2

    公开(公告)日：2020-08-11

    申请号：US16354024

    申请日：2019-03-14

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Mehdi Ganji ,  Hongbing Cheng ,  Kee-Bong Song ,  Qi Zhan

    IPC: H04B7/04 ,  H04B7/06 ,  H04B7/0456

    Abstract: A method of designing a codebook for analog beamforming. In some embodiments, the method includes: generating a plurality of training points, based on a predefined distribution, each training point being a channel vector; generating, for each of a plurality of codewords, a respective initial value; assigning, in a first assignment operation, each of the training points to a respective desired codeword, the desired codeword maximizing a metric function of a beamforming gain for the training point over the codewords; updating, in a first updating operation, each of the codewords according to the training points assigned to it; and determining whether convergence is achieved; and in response to determining that convergence is achieved, determining a final codebook.

    Apparatus and method for dynamically selecting beamforming codebook and hierarchically generating beamforming codebooks
    10.
    发明授权
    Apparatus and method for dynamically selecting beamforming codebook and hierarchically generating beamforming codebooks 有权

    公开(公告)号：US10892810B2

    公开(公告)日：2021-01-12

    申请号：US16735042

    申请日：2020-01-06

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Qi Zhan ,  Hongbing Cheng ,  Kee-Bong Song

    IPC: H04B7/06 ,  H04B7/0456

    Abstract: An apparatus and method for dynamically selecting a beamforming codebook and hierarchically generating beamforming codebooks is provided. According to one embodiment, an apparatus includes a channel estimation processor configured to receive a signal using a current beamforming codebook in a current beam sweeping period; a look-up table configured to store a plurality of beamforming codebooks; a state abstraction processor connected between the channel estimation processor and the look-up table, and configured to determine a codebook index based on a current channel condition as a function of the received signal and the current beamforming codebook, and select one of the plurality of beam sweeping codebooks in the look-up table as the beamforming codebook for the next beam sweeping period based on the codebook index.

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