公开(公告)号：US20230403185A1

公开(公告)日：2023-12-14

申请号：US18033670

申请日：2021-09-01

Applicant: Samsung Electronics Co., Ltd.

Inventor： Joonho CHO ,  Jeonghoon CHOI

IPC: H04L25/03 ,  H04L27/00 ,  H04L27/26 ,  H04L5/00

CPC classification number: H04L25/03828 ,  H04L27/0008 ,  H04L27/2636 ,  H04L5/001

Abstract: Provided are a discrete Fourier transform (DFT)-spread orthogonal frequency division multiplexing (OFDM) transmitter and transmission method, and a DFT-spread OFDM receiver and reception method which may receive signals transmitted thereby, in which a constellation rotation angle and a frequency domain spectrum shaping vector are designed such that a PAPR may be easily traded off with frequency efficiency even without inter-symbol interference. The DFT-spread OFDM transmitter includes a constellation rotation unit constellation-rotating a symbol vector including M pulse amplitude modulation (PAM) symbols by a constellation rotation angle to generate a constellation-rotated symbol vector, a pruned DFT-spread unit spreading the constellation-rotated symbol vector by using a pruned DFT matrix to generate a pruned DFT-spread vector, a frequency domain spectrum shaping unit performing a Hadamard product on the pruned DFT-spread vector with a shaping vector to generate a frequency domain spectrum shaped vector, and a subcarrier allocation unit allocating the frequency domain spectrum shaped vector to a subcarrier in an allocated frequency range.

公开(公告)号：US20190327120A1

公开(公告)日：2019-10-24

申请号：US16389409

申请日：2019-04-19

Applicant: Samsung Electronics Co., Ltd. ,  Postech Academy-Industry Foundation

Inventor： Yeohun YUN ,  Jubum KIM ,  Joonho CHO ,  Chanhong KIM

IPC: H04L27/26 ,  H04L27/36

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). A method for operating a transmission device in a wireless communication system is provided. The method includes generating modulation symbols based on a modulation scheme, generating transformed data by applying a modified Fourier transform to the modulation symbols, generating a transmission signal based on the transformed data, and transmitting the transmission signal. The modified Fourier transform applies to each of the modulation symbols an amount of phase change that is shifted from an amount of reference phase change by a phase offset.

公开(公告)号：US20230275798A1

公开(公告)日：2023-08-31

申请号：US18313699

申请日：2023-05-08

Applicant: Samsung Electronics Co., Ltd. ,  POSTECH Research and Business Development Foundation

Inventor： Kyeongyeon KIM ,  Joonho CHO ,  Jeonghoon CHOI

IPC: H04L27/38 ,  H04L27/26 ,  H04L25/49 ,  H04L27/22

CPC classification number: H04L27/3854 ,  H04L27/2655 ,  H04L25/4917 ,  H04L27/22

Abstract: The disclosure relates to a communication technique and a system for converging a fifth generation (5G) and subsequent communication system with Internet of things (IoT) technology to support a higher data transmission rate than a fourth generation (4G) system. The disclosure is applied to the intelligent service based on the 5G and subsequent communication technology and IoT-related technology. The reception device according to the disclosure receives orthogonal frequency division multiplexing (OFDM) signals through a plurality of antennas, aligns the received OFDM signals, converts at least one of the aligned reception signals into a designated symbol, estimates the data symbols of the reception signals based on the designated condition, and determines the data symbol of the reception signals by synthesizing at least one of the converted reception signals among the estimated reception signals.

公开(公告)号：US20200212979A1

公开(公告)日：2020-07-02

申请号：US16727391

申请日：2019-12-26

Applicant: Samsung Electronics Co., Ltd.

Inventor： Seijoon SHIM ,  Joonho CHO ,  Hayoung YANG ,  Eunae LEE ,  Taejun JANG ,  Jonghwan KIM

IPC: H04B7/06 ,  H04L5/00 ,  H04B7/0417 ,  H04B7/08 ,  H04L27/26

Abstract: A base station for transmitting and receiving signals in a wireless communication system is provided. The base station includes a transceiver, and at least one processor configured to obtain reception antenna weights for the base station including an array of a plurality of antennas, and transmission antenna weights for at least one user equipment (UE), convert signals received from the at least one UE through a plurality of reception paths, into beam-domain signals, based on the transmission antenna weights and the reception antenna weights, combine the converted beam-domain signals by applying predefined combining weights to the converted beam-domain signals, and obtain data from the combined signals.