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21.发明申请公开(公告)号：US20200287757A1
公开(公告)日：2020-09-10
申请号：US16884918
申请日：2020-05-27
Applicant: Samsung Electronics Co., Ltd.
Inventor： Federico Penna , Hongbing Cheng , Kee-Bong Song
Abstract: A receiver circuit for separating a plurality of layers multiplexed in an orthogonal frequency domain multiplexed (OFDM) signal includes: a descrambling sub-circuit configured to descramble a plurality of signals received on non-adjacent subcarriers of the OFDM signal to generate a plurality of descrambled signals; an inverse fast Fourier transform sub-circuit configured to transform the descrambled signals from a frequency domain to a received signal including a plurality of samples in a time domain; and a layer separation sub-circuit configured to separate the layers multiplexed in the received signal by: defining a first time domain sampling window and a second time domain sampling window in accordance with a size of the inverse fast Fourier transform; extracting one or more first layers from the samples in the first time domain sampling window; and extracting one or more second layers from the samples in the second time domain sampling window.
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公开(公告)号：US10651905B1
公开(公告)日：2020-05-12
申请号：US16256301
申请日：2019-01-24
Applicant: Samsung Electronics Co., Ltd.
Inventor： Qi Zhan , Hongbing Cheng , Kee-Bong Song
IPC: H04B7/04 , H04B7/0456 , H04L27/26 , H04B7/06 , H04B7/0417
Abstract: A method and system for selecting precoding matrix index are herein disclosed. The method includes determining a precoder and candidate beams, selecting base beams based on a correlation power between the determined precoder and determined candidate beams, and estimating amplitude coefficients and cophase coefficients based on a correlation between the determined precoder and the selected base beams.
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公开(公告)号：US20200136694A1
公开(公告)日：2020-04-30
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: H04B7/0456 , H04B7/06
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.
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公开(公告)号：US10536239B2
公开(公告)日：2020-01-14
申请号：US15447899
申请日：2017-03-02
Applicant: Samsung Electronics Co., Ltd.
Inventor： Hongbing Cheng , Ruchen Duan , Jungwon Lee
Abstract: A method and apparatus are provided. The method includes receiving, by a user equipment (UE), a first signal from a transceiver, determining one of a probability and a soft mean with a soft variance associated with the detected data symbol, determining a first coefficient and a second coefficient based on the determined one of the probability and the soft mean with the soft variance associated with the detected data symbol, determining channel state information (CSI) on a channel between the transceiver and the UE based on a second signal received by the UE from the transceiver, a previous CSI, the first coefficient and the second coefficient, and tracking the communication channel based on the determined CSI.
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公开(公告)号：US11804890B2
公开(公告)日：2023-10-31
申请号：US17538290
申请日：2021-11-30
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yanru Tang , Hongbing Cheng , Kee-Bong Song
IPC: H04B7/08
CPC classification number: H04B7/086
Abstract: A wireless communication device includes: a processing circuit configured to: receive, from an antenna array during a previous period, a first directional electromagnetic signal including beam sweeping reference symbols of a previous beam sweeping period; compute an estimated combined channel; estimate a dominant angle-of-arrival (AoA) of the first directional electromagnetic signal based on the estimated combined channel and a previous beamforming codebook including two or more beamforming vectors corresponding to different AoAs; construct an updated beamforming codebook based on the estimated dominant AoA and one or more remaining AoAs spaced apart from the estimated dominant AoA; receive, at the antenna array during a current period, a second directional electromagnetic signal including data symbols; determine a beamforming vector for data reception of the second directional electromagnetic signal based on the updated beamforming codebook; and detect the data symbols in the second directional electromagnetic signal based on the determined beamforming vector.
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Patent Agency Ranking
公开(公告)号：US11616563B2
公开(公告)日：2023-03-28
申请号：US16983813
申请日：2020-08-03
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yanru Tang , Hongbing Cheng , Kee-Bong Song
IPC: H04B7/08
Abstract: A wireless communication device includes: a processing circuit configured to: receive, from an antenna array during a previous period, a first directional electromagnetic signal including beam sweeping reference symbols of a previous beam sweeping period; compute an estimated combined channel; estimate a dominant angle-of-arrival (AoA) of the first directional electromagnetic signal based on the estimated combined channel and a previous beamforming codebook including two or more beamforming vectors corresponding to different AoAs; construct an updated beamforming codebook based on the estimated dominant AoA and one or more remaining AoAs spaced apart from the estimated dominant AoA; receive, at the antenna array during a current period, a second directional electromagnetic signal including data symbols; determine a beamforming vector for data reception of the second directional electromagnetic signal based on the updated beamforming codebook; and detect the data symbols in the second directional electromagnetic signal based on the determined beamforming vector.
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公开(公告)号：US11211994B2
公开(公告)日：2021-12-28
申请号：US16989653
申请日：2020-08-10
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yanru Tang , Hongbing Cheng , Kee-Bong Song
Abstract: Compressive sensing (CS) channel recovery using history measurements. Both current and history measurements for AoAs estimation, and only use current measurement for coefficient estimation. The dominant angle of arrival (AoA) is estimated using history and current measurements. In Approach 1, the dominant AoA is invariant and the coefficients are uncorrelated. In Approach 2, the dominant AoA is invariant and the coefficients are fully correlated. The remaining AoAs are estimated. The coefficients corresponding to each estimated dominant AoA are estimated. And the channel is recovered.
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公开(公告)号：US11196477B2
公开(公告)日：2021-12-07
申请号：US16983813
申请日：2020-08-03
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yanru Tang , Hongbing Cheng , Kee-Bong Song
IPC: H04B7/08
Abstract: A wireless communication device includes: a processing circuit configured to: receive, from an antenna array during a previous period, a first directional electromagnetic signal including beam sweeping reference symbols of a previous beam sweeping period; compute an estimated combined channel; estimate a dominant angle-of-arrival (AoA) of the first directional electromagnetic signal based on the estimated combined channel and a previous beamforming codebook including two or more beamforming vectors corresponding to different AoAs; construct an updated beamforming codebook based on the estimated dominant AoA and one or more remaining AoAs spaced apart from the estimated dominant AoA; receive, at the antenna array during a current period, a second directional electromagnetic signal including data symbols; determine a beamforming vector for data reception of the second directional electromagnetic signal based on the updated beamforming codebook; and detect the data symbols in the second directional electromagnetic signal based on the determined beamforming vector.
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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.
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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.
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