Lg Electronics Inc.

Samsung Electronics Co., Ltd.

Korea Advanced Institute of Science and Technology

Yonsei University

Fairchild Korea Semiconductor Ltd.

Hojae Lee

Sangrim Lee

Dongkyu Kim

Kwangseok Noh

Hyunsoo Ko

Myeongjin Kim

Kijun Jeon

Kijun Kim

Byounghoon Kim

Kukheon Choi

Byungkyu Ahn

Gwanmo Ku

Jayeong Kim

Woonghee Lee

Sangwook Han

Hyukjin Chae

Sungjin Kim

Hanbyul Seo

Jaehoon Chung

Bonghoe Kim

Sanghoon Lee

Kyungho Lee

Yeongjun Kim

Yunjung Yi

Sukhyon Yoon

Eunsun Kim

Kilbom Lee

Haewook Park

Ikjoo Jung

Seonghyun Kim

Beom Kwon

Suckchel Yang

Jiwon Kang

Taeyoung Kim

Yung-Soo Kim

Jungshin Park

Sunam Kim

Hoon Sik Kim

Minki Ahn

Woochan Kim

Eun-Seok Ko

Jin-Tae Kim

Hyun-Chul Eom

Insung Choi

Taehyun Lee

Sangyong Lim

Kwang-Il Lee

Shanmei Li

Kyungmin Woo

Kyongjo Jung

Won Il Kim

Provided are a device and a method for estimating an angle of arrival (AoA) and an angle of departure (AoD) in a communication system having 1-bit quantization.

Device and method for estimating angle of reception signal

A sender may: decompose, on the basis of a plurality of semantic elements, data into semantic element values respectively corresponding to the plurality of semantic elements; perform a first transmission including some semantic element values from among the semantic element values; and on the basis of receiving a retransmission request for the first transmission from a receiver, perform a retransmission including at least one semantic element value other than the semantic element values included in the first transmission, from among the plurality of semantic element values.

Method, sender, processing device, and storage medium for transmitting data in semantic-based wireless communication system, and method, receiver, and storage medium for receiving data

Wireless communication device

The present specification provides a method for estimating a quantum bit error rate (QBER) for key information, performed by a device in a quantum cryptography communication system, the method and device being characterized by: receiving a random access (RA) preamble from another device; transmitting a random access response (RAR) to the other device, in response to the RA preamble, performing a radio resource control (RRC) connection process with the other device; receiving data from the other device; and decoding the data on the basis of the key information, wherein the key information is determined on the basis of estimation of the QBER, and the device estimates the QBER on the basis of first two-dimensional parity information received from the other device through a public channel.

Method and device for estimating quantum bit error rate on basis of maximum bit group and two-dimensional parity

A method performed by means of a first wireless device in a wireless communication system, according to one embodiment of the present specification, comprises the steps of: transmitting, to a second wireless device, a first signal to which a first specific beam is applied; transmitting, to the second wireless device, a second signal to which a second specific beam is applied; receiving, from the second wireless device, feedback information generated on the basis of the first signal and the second signal; and determining, on the basis of the feedback information, a beam related to the second wireless device.

Method for controlling beam in wireless communication system, and apparatus therefor

A method performed by a first wireless device in a wireless communication system, according to one embodiment of the present specification, comprises the steps of: transmitting, to a second wireless device, a signal to which a specific beam is applied; receiving, from the second wireless device, feedback information generated on the basis of the signal; and determining, on the basis of the feedback information, a beam related to the second wireless device.

A transmission device in a wireless communication system: maps respective reference signals for a plurality of antennas to frequency resources; and transmits the reference signals on the frequency resources. Mapping the reference signals to the frequency resources comprises mapping the reference signals such that: (i) the frequency difference between a frequency resource ffor a reference signal of an antenna Vand a frequency resource ffor a reference signal of an antenna Vis Δf; and (ii) the frequency difference between the frequency resource fand a frequency resource ffor a reference signal of an antenna Vis Δf, wherein m is an antenna index along a first direction, and n is an antenna index along a second direction orthogonal to the first direction.

Method, transmission device, processing device, and storage medium for transmitting reference signal, and method and reception device for receiving reference signal

A signal transmission method performed by means of a terminal for performing federated learning in a wireless communication system is provided. According to the signal transmission method, the terminal receives downlink control information (DCI) from a base station, the DCI informing of a specific computation group ID and a modulation and coding scheme (MCS), modulates and encodes data on the basis of the MCS when the specific computation group ID is the same as a computation group ID allocated to the terminal, the data including a parameter related to the federated learning performed by the terminal, and transmits a signal including the data to the base station on the basis of the modulation and encoding.

Digital aircomp signaling

Disclosed is a method for aligning gradient symbols by using bias regarding AirComp in a signal amplitude range of a receiver. A method for aligning gradient symbols according to an embodiment of the present disclosure comprises the steps of: performing iteration of gradient values included in a first planar vector and applying clipping and bias values so as to obtain a second planar vector having gradient values in which symbols are aligned; and transmitting the second planar vector together with channel information to a server in the form of AirComp. Various embodiments of the present disclosure may be linked to an artificial intelligence module, a drone (unmanned aerial vehicle, UAV), a robot, an augmented reality (AR) device, a virtual reality (VR) device, a device related to a 5G service, and the like.

Method for aligning gradient symbols by using bias regarding aircomp in signal amplitude range of receiver

A receiver used in an optical wireless communication system is provided. The receiver comprises: a receiving aperture for receiving an optical signal; a coupler for separating the optical signal received by means of the receiving aperture into a main signal and a sensing signal; a sensor for determining a control voltage Von the basis of the sensing signal; and a detector for outputting an electric signal which is an output voltage V on the basis of the main signal and control voltage V. The detector is formed such that the transfer function of the detector changes on the basis of the control voltage V.

Method and receiver for receiving optical signal in optical wireless communication system

The present specification provides a method, performed by an apparatus, for transmitting at least one beam in a wireless communication system, the method comprising transmitting the at least one beam to another apparatus and receiving information about a result of measuring the at least one beam from the other apparatus, wherein the at least one beam is a beam generated on the basis of a signal synthesized from a laser signal being incident on a meta surface from a power controller, the laser signal consists of a plurality of frequency components, the synthesized signal is a signal in which power amplification is applied to each of the plurality of frequency components, and the power amplification is applied on the basis of the intensity regarding each of the plurality of frequency components.

Frequency comb power control apparatus for 4D beamforming, and method therefor

The present specification provides a method and a device, the method, performed by a device, for transmitting a first pulse train in a quantum communication system being characterized by: receiving a random access (RA) preamble from another device; transmitting an RA response (RAR) to the other device as a response to the RA preamble; performing a radio resource control (RRC) connection process with the other device; receiving data from the other device; and decoding the data on the basis of key information, wherein a first pulse train is generated in a laser diode of the device, and the key information is determined on the basis that the first pulse train passes through both a first path and a second path and is then transmitted from the device to the other device via a quantum channel.

Method and device for multi-wavelength plug-and-play quantum key distribution without time delay due to wavelength conversion

Provided is a method and device for correcting an error in a communication system, the method including: transmitting, to another device, data encrypted based on key information. The key information is obtained by: incident a detection pulse on a variable Faraday rotating mirror and a reference pulse on a first mirror, respectively, wherein the detection pulse and the reference pulse are pulses branched from a test pulse; generating a first current in a balanced photodetector (BPD) based on a first component obtained as the detection pulse is reflected from the variable Faraday rotating mirror and a second component obtained as the reference pulse is reflected from the first mirror; converting the first current into a second current; incident the second current on the variable Faraday rotating mirror; and correcting the error in the variable Faraday rotating mirror based on the incident second current.

Method and apparatus for correcting polarization distortion of faraday rotating mirror in plug-and-play quantum key distribution system

Disclosed is a method by which a terminal controls the calculations of a deep neural network in a wireless communication system. A method according to one embodiment of the present disclosure receives a downlink from a base station of a wireless communication system by using a multi input multi output (MIMO) operation, pre-processes the downlink on the basis of a result of calculations of a deep neural network in a terminal, acquires the number of a plurality of transmission antennas connected to the terminal, acquires the number of a plurality of reception antennas connected to the terminal, and forms a plurality of overlapping neural networks overlapping in the deep neural network, on the basis of a preset number of reference antennas, the number of transmission antennas, and the number of reception antennas. The terminal of the present disclosure can be linked to an artificial intelligence module, a drone (unmanned aerial vehicle (UAV)), a robot, an augmented reality (AR) device, a virtual reality (VR) device, a device related to 6G services, and the like.

Method for controlling calculations of deep neural network in wireless communication system, and apparatus therefor

The present specification provides a method, performed by a device, for transmitting information about a pencil beam timing offset in a wireless optical communication system, in which a reference synchronization time is obtained, wherein the reference synchronization time is obtained on the basis of a cell-reference synchronization signal (C-RSS) received from another device, a peak energy time is obtained, the pencil beam timing offset is obtained on the basis of the reference synchronization time and the peak energy time, and information about the pencil beam timing offset is transmitted to the other device.

Frequency gradient metasurface device and method based on fast beam steering system

Growing community of inventors

Seoul, South Korea

Hojae Lee