Samsung Electronics Co., Ltd.

Chongdon Kim

Hayoung Yang

Seijoon Shim

Chanho Choi

Joohyun Lee

Ikbeom Lee

Byungjoon Park

Myeongcheol Shin

Jinhwan Kang

Soongyoon Choi

Youngtaek Bae

Jinwhan Kang

Disclosed is a 5G or pre-5G communication system for supporting a data transmission rate higher than that of a 4G system such as LTE. According to one embodiment, disclosed is a method by which a base station performs downlink beamforming in a wireless access system, comprising the steps of, receiving, from a terminal, information related to a channel state, checking, on the basis of the information related to a channel state, channel state information estimated by subcarrier group unit, acquiring analog beamforming information and digital beamforming information on the basis of the channel state information, performing, by subcarrier group unit, hybrid beamforming in which the analog beamforming and the digital beamforming are combined, on the basis of the analog beamforming information and the digital beamforming information, and transmitting subcarrier group information corresponding to the subcarrier group, wherein the number of subcarriers in the subcarrier group is no more than the number of subcarriers included in one resource block.

Method and device for performing beamforming in wireless communication system

The present disclosure relates to a communication method and system for converging a 5-Generation (5G) communication system for supporting higher data rates beyond a 4-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present invention relates to a method and device for decoding data by a base station in a wireless communication system, and the method of the present invention comprises the steps of: transmitting, by a base station, phase tracking reference signal (PTRS) allocation information, which includes PTRS port information and orthogonal cover code (OCC) information, to a terminal; receiving, from the terminal, a demodulation reference signal (DMRS) and a PTRS to which an OCC depending on the OCC information has been applied, so as to estimate phase noise; and compensating the phase noise to decode data received from the terminal.

Method and device for decoding data in wireless communication system

The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transmission rate than a 4G communication system such as LTE. A method for transmitting and receiving data comprises the steps of: receiving a first synchronization block over a first narrow band; identifying whether an indicator indicating that the first narrow band is not allocated to a terminal is included in the first synchronization block; and performing synchronization in the first narrow band if the indicator indicating that the first narrow band is not allocated to the terminal is not included in the first synchronization block.

Method and apparatus for transceiving data in wireless communication system

The present invention relates to a method and an apparatus for establishing a cell using system information of neighboring cells on the basis of interference environments of the neighboring cells in a wireless communication system. The method according to the present invention comprises the steps of: detecting, by a base station, cell IDs of neighboring cells by using synchronization signals transmitted from the neighboring cells; checking whether resources, to which common reference signals (CRS) transmitted from the neighboring cells are transmitted, overlap with each other, on the basis of the cell IDs; estimating channels of the neighboring cells by using the CRSs; and determining an interference environment for establishing a cell by using the result of the checking and the estimated channels.

Method and apparatus for establishing cell of base station in wireless communication system

A method and apparatus is provided for determining, by a receiving end, a correction time value according to ranging access in a wireless communication system. A reception apparatus in a wireless communication system comprises a signal period selector for selecting a first detection time interval and a second detection time interval from a RACH signal for ranging access, the RACH signal including a RACH preamble sequence, a time offset detector for detecting a first time offset and a second time offset, each corresponding to a point of time when the preamble sequence is received, from the selected first detection time interval and the second detection time interval, respectively, and a time offset determiner for determining a correction time value for correcting a point of time when data is transmitted by a transmitting end in the wireless communication system, on the basis of the detected first time offset and the second time offset. This research was carried out with the support of 'Pan-government Giga Korea Project' led by the Ministry of Science, ICT and Future Planning.

Method for determining correction time in wireless communication system and apparatus therefor

An electronic device in a wireless communication may include a communication unit configured to receive a signal, and a control unit configured to perform decoding of a control channel of the signal according to a first decoding condition among decoding conditions determined based on system information candidates for system information and to determine whether decoding is successful for the first decoding condition according to a result of performing the decoding.

Control channel decoding device and method in wireless communication system

The present disclosure provides a method for measuring an amount of interference from an antenna, the method comprising the operations of: receiving at least on reference symbol; calculating a reference symbol NI, which is the antenna-related noise interference (NI) in the at least one reference symbol, on the basis of the at least one reference symbol; receiving at least one data symbol; calculating a data symbol NI, which is the antenna-related NI in the data symbol, on the basis of the at least one data symbol; calculating an NI ratio of the antenna which is the ratio of the data symbol NI relative to the reference symbol NI; and determining an antenna weight of the antenna on the basis of the NI ratio.

Method and apparatus for measuring interference amount

Disclosed are a method and a device for differently applying phase rotations for each antenna by dividing a frequency band in order to solve a problem in which reception performance deteriorates in a specific subcarrier when the correlation between antennas is high. According to the present invention, a method by which a transmitter transmits a signal comprises the steps of: estimating the transmission correlation between respective transmission paths; calculating a phase rotation value to be applied to a transmission signal on the basis of the estimated transmission correlation; applying a phase rotation in accordance with the phase rotation value to the transmission signal; and transmitting the transmission signal.

Method and device for transmitting signal by switching phase in mobile communication system

A base station for transmitting data in an OFDM system is provided. The base station is configured to convert data or a signal into a wireless band and transmit the converted data or signal to a terminal, down-convert a signal and output the down-converted signal, and generate a message for requesting terminal capability information for a sub-carrier spacing and transmit the message to the terminal accessing the base station, generate information on sub-bands of groups available to the terminal in response to receiving a terminal capability response message from the terminal and transmit the information on the sub-bands of groups available to the terminal, allocate a resource by selecting sub-bands of one group of the sub-bands of the groups available to the terminal in response to receiving a scheduling request message from the terminal and generate and transmit a resource allocation message, and transmit the data using the allocated resource.

Multi-numerology based data transmitting and receiving method and apparatus capable of frequency hopping in OFDM system

An interference cancellation method and apparatus of a base station is provided for use in a wireless communication system, which includes receiving a first signal by a first antenna and a second signal by a second antenna, measuring interference amounts in the first signal and the second signal based on a result of channel measurement performed on the first signal and the second signal, and generating a third signal as a target of decoding by adjusting channel parameters associated with channel conditions of the first antenna and the second antenna based on the measured interference amounts. The channel parameters are generated based on the channel measurement result.

Interference cancellation method and apparatus for wireless communication system

The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transfer rate than a 4G communication system such as LTE. The method is for phase correction of an antenna in a large-capacity antenna system, the method includes grouping large-capacity antennas into a predetermined number of groups; setting a path such that ports of the grouped antennas have a feedback path; outputting a test signal to be outputted to each antenna port of each group by adding a code or sequence having orthogonality; separating signals for each antenna port in the group by using the code or sequence having orthogonality in a signal received through the feedback path; and calculating a calibration value by detecting a phase change of the separated signal.

Method and apparatus for antenna phase correction in large-capacity antenna system

Provided are an apparatus for supporting a plurality of wireless communication systems and an operating method of the same. The apparatus receives an integrated signal including a first wireless communication system signal and a second wireless communication system signal assigned to a certain frequency band, performs first processing on the integrated signal, performs second processing on the integrated signal, is scheduled to perform at least one of first interference cancellation (IC) process of canceling interference of the first wireless communication system signal from the integrated signal based on the signal on which first processing is performed or second IC process of canceling interference of the second wireless communication system signal from the integrated signal based on the signal on which second processing is performed, and performs at least one of the first IC process or the second IC process based on the scheduling.

Apparatus for supporting a plurality of wireless communication systems and operating method of the same

The present disclosure relates to a 5G or a pre-5G communication system for supporting a higher data rate beyond 4G communication systems such as LTE. A signal transmitting method of an apparatus according to an embodiment of the present disclosure may include: confirming a location of a control signal for a first communication system when a transmission band of the first communication system and a transmission band of a second communication system overlap each other; puncturing a signal for the second communication system at the confirmed location of the control signal for the first communication system; and transmitting the punctured signal for the second communication system.

Apparatus, terminal and signal transmitting and receiving method thereof in a wireless communication system

A communication method and system for converging a fifth generation (5G) communication system supporting a data rate higher than that of a fourth generation (4G) system with internet of things (IoT) technology are provided. A system-specific resource allocation method of a base station supporting multiple communication systems is provided in order for the base station to improve qualities of system-specific signals. The method includes allocating a first resource for a first system operating with a first transmit power and a second resource for a second system operating with a second transmit power to at least one terminal and receiving a signal including a first signal corresponding to the first system and a second signal corresponding to the second system on the first resource and the second resource from the at least one terminal, the first resource and the second resource being identical in position with each other in a resource grid.

Base station and operation method thereof in wireless communication system

The present disclosure relates to a communication technique for convergence of a 5G communication system for supporting a higher data transmission rate beyond a 4G system with an IoT technology, and a system therefor. The present disclosure may be applied to an intelligent service (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security and safety-related service, etc.) on the basis of a 5G communication technology and an IoT-related technology. An operation method of an inter-antenna phase calibration device in a wireless communication system using an unlicensed band according to an embodiment of the present invention comprises the steps of: calculating a listen before talk (LBT) processing time while an LBT is being performed; selecting a calibration mode for calibrating an inter-antenna phase on the basis of the LBT processing time; and calibrating the inter-antenna phase according to the selected calibration mode.

Growing community of inventors

Seongnam-si, South Korea

Chongdon Kim