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公开(公告)号：US11909472B2
公开(公告)日：2024-02-20
申请号：US17729457
申请日：2022-04-26
Applicant: Samsung Electronics Co., Ltd.
Inventor： Federico Penna , Hyukjoon Kwon , Dongwoon Bai , Jaein Kim , Junho Lee , Hui Won Je
IPC: H04L5/12 , H04B7/0456 , H04L5/00 , H04B7/06
CPC classification number: H04B7/0456 , H04B7/0632 , H04L5/0094
Abstract: The disclosure provides a method of providing implicit channel state information (CSI) feedback from a user equipment (UE). The method includes determining a precoding matrix indicator (PMI) selection decision metric, selecting one of a sub-band (SB) linear combination coefficient (LCC) selection method, a wideband (WB) LCC selection method, or a sub-band group (SBG) LCC selection method, based on the determined PMI selection decision metric, determining, using the selected LCC selection method, PMI indices based on sub-bands configured by a base station, and transmitting the determined PMI indices to the base station.
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公开(公告)号：US20230275693A1
公开(公告)日：2023-08-31
申请号：US17845219
申请日：2022-06-21
Applicant: Samsung Electronics Co., Ltd.
Inventor： Jung Hyun Bae , Daeson Kim , Jinhong Wu , Mohamad Monzer Mansour , Dongwoon Bai , Kee-Bong Song
IPC: H04L1/00
CPC classification number: H04L1/0045 , H04L1/0067 , H04L1/0057
Abstract: Provided is a method of decoding, the method including receiving, by a user equipment (UE), a downlink control information (DCI) that is encoded, identifying, by the UE, a first bit position of the DCI as a known bit, and reducing a number of candidate code words for the DCI based on the known bit.
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23.发明申请公开(公告)号：US20220188986A1
公开(公告)日：2022-06-16
申请号：US17244504
申请日：2021-04-29
Applicant: Samsung Electronics Co., Ltd.
Inventor： Mojtaba RAHMATI , Dongwoon Bai , Jungwon Lee
Abstract: A method and system are provided. The method includes determining a difference map between a reference frame and a non-reference frame, determining a local variance of the reference frame, determining a detail power map based on a difference between the determined local variance and the determined difference map, and determining a detail grade map based on the determined detail power map.
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公开(公告)号：US10959236B2
公开(公告)日：2021-03-23
申请号：US16030779
申请日：2018-07-09
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yoo Jin Choi , Dongwoon Bai , Jungwon Lee , Sungyoon Cho , Heunchul Lee , Sungsoo Kim
Abstract: A system and method for characterizing an interference demodulation reference signal (DMRS) in a piece of user equipment (UE), e.g., a mobile device. The UE determines whether the serving signal is transmitted in a DMRS-based transmission mode; if it is, the UE cancels the serving DMRS from the received signal; otherwise the UE cancels the serving data signal from the received signal. The remaining signal is then analyzed for the amount of power it has in each of four interference DMRS candidates, and hypothesis testing is performed to determine whether interference DMRS is present in the signal, and, if so, to determine the rank of the interference DMRS, and the port and scrambling identity of each of the interference DMRS layers.
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25.发明授权公开(公告)号：US10762162B2
公开(公告)日：2020-09-01
申请号：US16742231
申请日：2020-01-14
Applicant: Samsung Electronics Co., Ltd.
Inventor： Binnan Zhuang , Dongwoon Bai , Jungwon Lee
IPC: G06F17/12 , H04N5/232 , G06T5/00 , H04N13/282 , G06T7/285 , G06T7/80 , G06F7/58 , H04N19/00 , G06F17/16 , H04N13/204
Abstract: An apparatus and method of low complexity optimization solver for path smoothing with constraint variation are herein disclosed. According to one embodiment, an apparatus includes an L1 central processing unit (CPU) configured to transform an L1 trend filtering problem to a primal-dual linear programming (LP) optimization problem pair; and an L1 arithmetic logic unit (ALU) connected to the L1 CPU and configured to solve a primal problem of the primal-dual LP optimization problem pair with an extended full tableau simplex method.
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Patent Agency Ranking
公开(公告)号：US20190174507A1
公开(公告)日：2019-06-06
申请号：US16267620
申请日：2019-02-05
Applicant: Samsung Electronics Co., Ltd.
Inventor： Mojtaba RAHMATI , Dongwoon Bai , Jungwon Lee
Abstract: A method and an apparatus. The method includes receiving a signal including a serving signal and an interference signal; applying a Gaussian approximation (GA) on the serving signal and the interference signal; determining likelihood metrics for hypotheses on a rank of the interference signal, a precoding matrix index, and power on the GA-applied interference signal based on a covariance matrix for each of the hypotheses; and selecting one of the hypotheses that maximizes one of the likelihood metrics.
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27.发明申请公开(公告)号：US20180323929A1
公开(公告)日：2018-11-08
申请号：US16030779
申请日：2018-07-09
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yoo Jin Choi , Dongwoon Bai , Jungwon Lee , Sungyoon Cho , Heunchul Lee , Sungsoo Kim
IPC: H04L5/00 , H04B17/345 , H04W52/24 , H04W72/06
CPC classification number: H04L5/0048 , H04B17/345 , H04W52/243 , H04W72/06
Abstract: A system and method for characterizing an interference demodulation reference signal (DMRS) in a piece of user equipment (UE), e.g., a mobile device. The UE determines whether the serving signal is transmitted in a DMRS-based transmission mode; if it is, the UE cancels the serving DMRS from the received signal; otherwise the UE cancels the serving data signal from the received signal. The remaining signal is then analyzed for the amount of power it has in each of four interference DMRS candidates, and hypothesis testing is performed to determine whether interference DMRS is present in the signal, and, if so, to determine the rank of the interference DMRS, and the port and scrambling identity of each of the interference DMRS layers.
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28.发明授权公开(公告)号：US10070447B1
公开(公告)日：2018-09-04
申请号：US15601366
申请日：2017-05-22
Applicant: Samsung Electronics Co., Ltd.
Inventor： Abhik K. Das , Dongwoon Bai , Jungwon Lee
Abstract: A method and apparatus are provided. The method includes receiving reference signal resource elements from a transceiver, determining a channel impulse response (CIR) signal based on the received reference signal resource elements, estimating a coarse value of a FAP of the reference signal resource elements based on the CIR signal, estimating a fine value of the FAP of the reference signal resource elements based on CIR samples around the FAP location, and combining the coarse value estimate and the fine value estimate to determine the FAP estimate.
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公开(公告)号：US20180205470A1
公开(公告)日：2018-07-19
申请号：US15462639
申请日：2017-03-17
Applicant: Samsung Electronics Co., Ltd.
Inventor： Yoo Jin Choi , Dongwoon Bai , Linbo Li , Farrokh Etezadi , Jungwon Lee
IPC: H04B17/336 , H04L27/148 , H04L27/10
CPC classification number: H04B17/336 , H04B17/21 , H04L27/10 , H04L27/148
Abstract: A system and method for removing bias from a frequency estimate. A simulation is used to predict, for various values of the signal to noise ratio, a bias in a raw frequency estimate produced by a frequency estimation algorithm. A straight line is fit to simulated frequency offset estimates as a function of true frequency offset, and the reciprocal of the slope of the line is stored, as a multiplicative bias removal term, in a lookup table, for the simulated signal to noise ratio. In operation, the raw frequency estimate is multiplied by a multiplicative bias removal term, obtained from the lookup table, to form a corrected frequency offset estimate.
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30.发明授权公开(公告)号：US09882761B2
公开(公告)日：2018-01-30
申请号：US15210468
申请日：2016-07-14
Applicant: Samsung Electronics Co., ltd.
Inventor： Binnan Zhuang , Jung Hyun Bae , Dongwoon Bai , Jungwon Lee
CPC classification number: H04L27/2662 , H04L7/0058 , H04L7/033 , H04L25/022 , H04L25/025 , H04L25/0256
Abstract: Apparatuses (and methods of manufacturing same), systems, and methods for channel interpolation/estimation and/or frequency tracking suitable for a receiver in a high speed single frequency network (HS-SFN) scenario are described. In one aspect, an estimated frequency offset (FO) correction is calculated for a received signal using at least an FO estimation provided by an automatic frequency control (AFC) in a first feedback loop and a channel estimate is calculated using at least the estimated FO and one or more channel parameter estimates from the AFC in a second feedback loop. In another aspect, a phase locked loop (PLL) receives an lth orthogonal frequency division multiplexing (OFDM) symbol and produces a per-tap phase value for each tap i of the lth OFDM symbol. The per-tap phase values of the lth OFDM symbol are used to generate the PLL output, which is also used as input to a feedback loop.
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