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公开(公告)号：US20220114709A1
公开(公告)日：2022-04-14
申请号：US17559593
申请日：2021-12-22
Applicant: Samsung Electronics Co., Ltd.
Inventor： Mojtaba RAHMATI , Dongwoon BAI , Jungwon LEE
Abstract: An apparatus and method for successive multi-frame image denoising are herein disclosed. The apparatus includes a first subtractor including a first input to receive a frame of the image, a second input to receive a reference frame, and an output; an absolute value function block including an input connected to the output of the first subtractor and an output; a second subtractor including a first input connected to the output of the absolute value function block, a second input for receiving a first predetermined value, and an output; and a maximum value divider function block including an input connected to the output of the second subtractor and an output for outputting filter weights.
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公开(公告)号：US20250132955A1
公开(公告)日：2025-04-24
申请号：US18888144
申请日：2024-09-17
Applicant: Samsung Electronics Co., Ltd.
Inventor： Mojtaba RAHMATI , Hyukjoon KWON , Dongwoon BAI
Abstract: A system and a method are disclosed for noise power estimation in wireless communications. In some embodiments, the method includes: receiving a reference signal; generating a first channel estimate, based on the reference signal; calculating a first noise power estimate; calculating a corrected noise power estimate by applying a multiplicative correction based on a linear minimum mean square error filter weight to the first noise power estimate; receiving a transmission; and decoding the transmission, based on the corrected noise power estimate.
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公开(公告)号：US20240348274A1
公开(公告)日：2024-10-17
申请号：US18490348
申请日：2023-10-19
Applicant: Samsung Electronics Co., Ltd.
Inventor： Mouna HAJIR , Mojtaba RAHMATI , Hyuk Joon KWON
IPC: H04B1/04
CPC classification number: H04B1/0475
Abstract: A system and a method are disclosed and include generating a first kernel based on a tap of a first transmission and a plurality of taps of a second transmission; calculating a first weighted coefficient set based on the first kernel; calculating a first self-interference transmission signal estimation based on the first weighted coefficient set; and obtaining a first cancellation signal by subtracting the first self-interference transmission signal estimation from a downlink received signal.
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公开(公告)号：US20220188984A1
公开(公告)日：2022-06-16
申请号：US17215529
申请日：2021-03-29
Applicant: Samsung Electronics Co., Ltd.
Inventor： Mojtaba RAHMATI , Dongwoon BAI , Jungwon LEE
Abstract: A method and system are provided. The method includes obtaining a difference map between a reference frame and a non-reference frame, estimating a noise variance of the obtained difference map, obtaining merging weights based on the estimated noise variance and the obtained different map, and merging the non-reference frame with the reference frame using the obtained merging weights.
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公开(公告)号：US20230308148A1
公开(公告)日：2023-09-28
申请号：US17840581
申请日：2022-06-14
Applicant: Samsung Electronics Co., Ltd.
Inventor： Mouna HAJIR , Mojtaba RAHMATI , Hyukjoon KWON
IPC: H04B7/0456 , H04B7/01 , H04L1/00 , H04B17/336 , H04L27/26
CPC classification number: H04B7/0486 , H04B7/01 , H04L1/0003 , H04B17/336 , H04L27/2605
Abstract: A system and a method are disclosed for normalizing Log-Likelihood Ratios for bits of a transport block. For a narrowband channel estimation (NBCE), a normalization factor is selected based on an estimated delay spread, a cyclic prefix, an estimated Doppler spread, a rank, a modulation and coding scheme (MCS) and a signal-to-noise ratio (SNR) for the transport block, and an input LLRin for the individual bits of the transport block are scaled to respectively form an output LLRout for the individual bits of the transport block using the normalization factor. For a wideband channel estimation, a normalization factor is selected based on the rank/MCS/SNR of the transport block, and the input LLRin for the individual bits of the transport block are scaled to respectively form the output LLRout for the individual bits of the transport block using the normalization factor.
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Patent Agency Ranking
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：US20220188985A1
公开(公告)日：2022-06-16
申请号：US17244481
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 receiving an input frame, performing high frequency noise reduction (HFNR) on the received input frame, performing low frequency noise reduction (LFNR) on the received input frame, and obtaining a hybrid denoised clean frame by fusing an output of the performed HFNR and an output of the performed LFNR.
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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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公开(公告)号：US20170288912A1
公开(公告)日：2017-10-05
申请号：US15630459
申请日：2017-06-22
Applicant: Samsung Electronics Co., Ltd.
Inventor： Mojtaba RAHMATI , Dongwoon BAI , Jungwon LEE
IPC: H04L25/02 , H04L27/38 , H04L1/00 , H04B7/0413
CPC classification number: H04L25/0256 , H04B7/0413 , H04L1/0048 , H04L1/0054 , H04L27/38
Abstract: Methods and apparatus for soft MIMO detection of high order QAM with initial candidate reduction are described. A method includes receiving a plurality of signals including Q-order quadrature amplitude modulation (QAM) symbols; determining, based on linear minimum mean square error (MMSE) estimation using detection of I and Q signs around a target layer, a reduced candidate set including C potential candidates, where C is less than Q; calculating Euclidean distances (EDs) based on the reduced candidate set; and generating log-likelihood ratio (LLR) information based on the calculated EDs.
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公开(公告)号：US20170245286A1
公开(公告)日：2017-08-24
申请号：US15144398
申请日：2016-05-02
Applicant: Samsung Electronics Co., Ltd.
Inventor： Mojtaba RAHMATI , Dongwoon BAI , Jungwon LEE
CPC classification number: H04W72/082 , H04J11/005 , H04L1/0054 , H04L5/0026 , H04L5/005 , H04W72/06
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, jointly, a maximum likelihood (ML) solution of rank, traffic to pilot ratio (TPR), and precoding matrix index on the GA-applied serving signal and the GA-applied interference signal. The apparatus includes an antenna for receiving a signal including a serving signal and an interference signal; a processor configured to apply a GA on the serving signal and the interference signal, and determine, jointly, an ML solution of rank, TPR, and precoding matrix index on the GA-applied serving signal and the GA-applied interference signal.
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