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公开(公告)号：US20240080227A1
公开(公告)日：2024-03-07
申请号：US18454367
申请日：2023-08-23
Applicant: Samsung Electronics Co., Ltd.
Inventor： Junil CHOI , Hwanjin KIM
IPC: H04L25/02
CPC classification number: H04L25/0254 , H04L25/0224
Abstract: A method and a device for estimating a channel in a wireless communication system are provided. Provided is a meta learning device including processing circuitry configured to receive pilot signals from a plurality of first user equipment (UEs) to obtain received pilot signals, the received pilot signals being based on existing wireless communication connections of the plurality of first UEs, and estimate channels of a plurality of second UEs via meta learning using the received pilot signals, the channels corresponding to new wireless communication connections of the plurality of second UEs.
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公开(公告)号：US20200212988A1
公开(公告)日：2020-07-02
申请号：US16727459
申请日：2019-12-26
Inventor： Jongbu LIM , Hyeongtaek LEE , Junil CHOI , Sucheol KIM , Myungkwang BYUN
IPC: H04B7/06 , H04B7/0408 , H04L5/00 , H04L27/26
Abstract: A communication system is provided. The communication system supports higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A first apparatus in a wireless communication system is provided. The apparatus includes an antenna array, at least one transceiver, and at least one processor. The transceiver is configured to transmit signals by using a beam set, and receive a signal for indicating at least one beam in the beam set from a second apparatus. The processor is configured to determine an auxiliary beam pair, based on the at least one beam. The transceiver is configured to transmit reference signals to the second apparatus by using the auxiliary beam pair, and receive feedback information relating to the auxiliary beam pair from the second apparatus. The at least one processor is configured to determine, based on the feedback information, a communication direction relating to the second apparatus.
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3.发明申请公开(公告)号：US20180198500A1
公开(公告)日：2018-07-12
申请号：US15106644
申请日：2014-12-22
Applicant: Samsung Electronics Co., Ltd. , Purdue Research Foundation
Inventor： Junil CHOI , David J. LOVE , Tae-Young KIM , Ji-Yun SEOL
IPC: H04B7/04
CPC classification number: H04B7/0478 , H04B7/0417 , H04L1/006
Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). Exemplary embodiment of the present invention provide a scheme for reducing feedback overhead when quantizing and feeding back channel state information in a MIMO system. A method for operating a receiver in a MIMO system, according to one embodiment of the present invention, includes the steps of: performing trellis coded quantization for channel information by using a codebook selected from a plurality of codebooks; and transmitting, to a transmitter, feedback information including the quantization result. The step of performing trellis-coded quantization for the channel information includes a step of truncating the channel information and codewords included in the selected codebook into multiple groups of channel vectors and multiple groups of codewords, respectively, and performing trellis-coded quantization for each of the groups of the channel vectors by using each of the groups of the codewords.
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Patent Agency Ranking
公开(公告)号：US20230336224A1
公开(公告)日：2023-10-19
申请号：US18141812
申请日：2023-05-01
Inventor： Yongyun CHOI , Chulhee JANG , Junil CHOI , Sucheol KIM , Hyeongtaek LEE , Hwanjin KIM
IPC: H04B7/06 , H04B7/0456 , H04B7/0426
CPC classification number: H04B7/0617 , H04B7/0639 , H04B7/0456 , H04B7/0426
Abstract: A method performed by a base station in a wireless communication system, includes: determining, from among a plurality of antennas of the base station, a first antenna that meets a power threshold, based on a first beamformer scaled according to a power limit; generating a second beamformer corresponding to the first antenna; applying an overlap coefficient matrix to the second beamformer; generating a third beamformer by combining the second beamformer to which the overlap coefficient matrix has been applied and the first beamformer; and transmitting a signal using the third beamformer.
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5.发明申请公开(公告)号：US20220224388A1
公开(公告)日：2022-07-14
申请号：US17703379
申请日：2022-03-24
Inventor： Yongyun CHOI , Chulhee JANG , Hyeongtaek LEE , Junil CHOI , Hwanjin KIM
Abstract: The disclosure relates to a 5th generation (5G) or pre-5G communication system for supporting a higher data rate after a 4th generation (4G) communication systems such as long term evolution (LTE). The disclosure is for reconstructing a downlink channel in a wireless communication system. An operation method for a base station is provided. The operation method includes the steps of transmitting downlink reference signals (RSs) to a terminal, receiving an indication of a first channel matrix estimated by the terminal and at least one uplink RS; estimating a second channel matrix on the basis of the at least one uplink RS, and on the basis of the first channel matrix and the second channel matrix, reconstructing channel information to be used for data transmission.
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6.发明公开公开(公告)号：US20240048257A1
公开(公告)日：2024-02-08
申请号：US18316028
申请日：2023-05-11
Applicant: Samsung Electronics Co., Ltd.
Inventor： Junil CHOI , Beomsoo KO , Hwanjin KIM
IPC: H04B17/391 , H04B17/309
CPC classification number: H04B17/3913 , H04B17/309 , H04B7/0413
Abstract: An electronic device which includes processing circuitry configured to acquire training data corresponding to multiple antennas, the training data having a label and features, the label including a first channel value for a first time slot, and the features including a plurality of second channel values for a plurality of time slots before the first time slot, train a channel prediction model based on the training data to obtain a trained channel prediction model, and obtain a channel prediction value for a prediction time based on the trained channel prediction model.
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7.发明公开公开(公告)号：US20230198810A1
公开(公告)日：2023-06-22
申请号：US17919425
申请日：2021-04-16
Inventor： Yongyun CHOI , Hwanjin KIM , Chulhee JANG , Junil CHOI
CPC classification number: H04L25/0204 , H04L25/0222 , H04W64/006
Abstract: Disclosed is a method for estimating a channel of a terminal by a base station in a wireless communication system supporting multiple antennas, the method comprising the steps of: estimating a moving speed of the terminal on the basis of a first channel value acquired at a current time point and a second channel value acquired at a previous time point; determining, on the basis of the estimated moving speed, a complexity degree corresponding to the number of channel values for multiple time points including the current time point; and estimating a channel of the terminal at a next time point on the basis of the determined complexity degree.
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8.发明申请METHOD AND APPARATUS FOR USING CHANNEL OUTPUT FEEDBACK IN MULTI USER WIRELESS SYSTEMS AND HYBRID-ARQ 有权在多用户无线系统和混合ARQ中使用信道输出反馈的方法和装置公开(公告)号：US20140112272A1
公开(公告)日：2014-04-24
申请号：US14058737
申请日：2013-10-21
Applicant: Purdue Research Foundation , Samsung Electronics Co., Ltd.
Inventor： Sangmin RO , Mayur AGRAWAL , David J. LOVE , Junil CHOI , Juho LEE
CPC classification number: H04W24/02 , H04L1/0026 , H04L1/1671 , H04L1/1893 , H04L5/0051
Abstract: A method and apparatus for transmitting and receiving a signal using a channel output feedback in a wireless communication system and Hybrid-Automatic Repeat Request (ARQ) are provided. The method and apparatus include a transmitter configured to transmit to a base station and a first packet on a precoder received from the base station. A receiver configured to receive, from the base station, a Channel Output Feedback (COF) of the transmitted first packet and information for transmitting a second packet. A controller configured to prepare a variant of the second packet using the COF and the received information for transmitting the second packet, and to control to transmit the prepared variant to the base station.
Abstract translation: 提供了一种使用无线通信系统和混合自动重传请求（ARQ）中的信道输出反馈来发送和接收信号的方法和装置。 所述方法和装置包括：发射机，被配置为向基站发送和从基站接收的预编码器上的第一分组。 一种被配置为从基站接收所发送的第一分组的信道输出反馈（COF）和用于发送第二分组的信息的接收机。 控制器，其被配置为使用所述COF和所接收的用于发送所述第二分组的信息来准备所述第二分组的变体，并且控制将所准备的变体发送到所述基站。
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