Korea University Research and Business Foundation

Samsung Electronics Co., Ltd.

Lg Electronics Inc.

Korea University Industrial Academic Collaboration Foundation

Inkyu Lee

Hae Wook Park

Han Bae Kong

Jinsam Kwak

Wookbong Lee

Ill Soo Sohn

Hoon Shung Lee

Changick Song

Chang Ick Song

Jihwan Moon

Seokju Jang

Chang Kyung Sung

Seok Hwan Park

Jiwon Kang

Bin Chul Ihm

Jungwon Lee

Yong Ho Seok

Eunsung Park

Jin Young Chun

Haewook Park

Sangrim Lee

Heejin Kim

Youngtae Kim

Ji-Hoon Kim

Sang Hyun Lee

Junyoung Choi

Sung Hyun Moon

Bruno Clerckx

Chanhong Kim

In-Seok Hwang

Youngjin Park

Jin-Sung Kim

Hi-Chan Moon

Chae-Man Lim

Changhee Lee

Ki Il Kim

Young-Doo Kim

Jun Young Heo

Tae-Seok Oh

Chung-Gu Kang

Sung-Woo Park

Tae-Yeong Kim

Tae Seok Oh

Jun Il Choi

Jong-Ho Oh

Jung-su Han

Sunghyun Moon

Sanggeun Lee

Bong-Jin Kim

Min-Ki Ahn

Sung-Hyun Moon

Ji Hwan Moon

Min Tae Kim

Hae-Wook Park

Su Bin Eom

Jeongwoo Kim

Hyungjoon Cha

Kyong-Jae Lee

Kwang Won Lee

Seong-Hyeon Moon

Kyoungjae Lee

Seok-Ju Jang

Seok Ju Jang

Min Ki An

Jeong Hyeon Jang

Kil-Bom Lee

A monitoring system using cooperative jamming and spoofing according to an embodiment of the present disclosure includes a spoofing relay to amplify and relay an illegal signal detected from an illegal transmitter according to a preset amplification coefficient, a cooperative jammer to transmit a jamming signal for changing the quality of a communication channel to an illegal receiver with a preset transmit power, and a monitor to calculate the amplification coefficient and the transmit power so that an information monitoring amount is maximum based on the illegal signal received from the spoofing relay.

System and method for monitoring wireless communication channel by using cooperative jamming and spoofing

A beamforming method in a simultaneous wireless information and power transfer system and an apparatus therefor may derive a transmission signal transmitted to a plurality of information users and a plurality of energy users from a base station having an N(here, Nis a natural number) number of antennas included in each cell, derive a SINR (Signal to Interference plus Noise Ratio) of an i(here, i is a natural number) information user by using a noise power of the i(here, i is a natural number) information user included in a m(here, m is a natural number) cell, derive a harvested power of a j(here, j is a natural number) energy user included in the m(here, m is a natural number) cell, and perform beamforming by using a transmission signal power at the base station and a total harvested power of the plurality of energy users receiving a transmission signal from the base station. Accordingly, it is possible to improve the effect of minimizing the transmission power of the base station and maximizing the harvested power of the energy users while satisfying the QoS (Quality of Service) and transmission power limitation of the information users.

Beamforming generation method in system for simultaneously transmitting wireless information and power, and recording medium and apparatus for performing same

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. According to an embodiment of the present invention, a method for controlling a base station supporting a multi-antenna system may comprise the steps of: generating a plurality of test signals for a plurality of antennas in a modem; controlling the plurality of generated test signals to be fed back to the modem through a plurality of feedback paths which are formed for the plurality of antennas, respectively, and do not affect each other; and identifying the plurality of test signals fed back to the modem, on the basis of the plurality of generated test signals.

Base station and control method therefor in wireless communication system

The present disclosure relates to a method and an apparatus of controlling base station power in a distributive manner in a wireless communication system. A method according to an embodiment of the present disclosure may include determining uindicating a turn-on or turn-off state of an i-th base station based on mutual message passing with an adjacent base station in the i-th base station among B base stations; determining xindicating whether a signal is transmitted to an a-th terminal among N terminals from the i-th base station; and obtaining an optimized value of the uand the xwhich minimize total energy consumption consumed by the B base stations and simultaneously, maximize a data rate of the B base stations.

Method and apparatus for distributed control of base station power in wireless communication system

Provided is a feedback method in a wireless communication system according to an embodiment of the present disclosure. The method includes enabling a receiver to acquire a reception signal vector including a channel component and a noise component, enabling the receiver to generate feedback information by performing one or more of the following on the reception signal vector: processing through one or more first layers; processing through a second layer, and processing through a quantization layer, and enabling the receiver to transmit the feedback information to a transmitter. In the feedback method, the quantization includes stochastic binarization.

Limited-feedback method and device based on machine learning in wireless communication system

Provided is a method where mobile relay performs bidirectional inter-terminal communication in wireless communication system. The method includes determining optimal values of predetermined variables for maximizing a transmission ratio for the bidirectional inter-terminal communication during a predetermined time segment using pieces of basic information of at least one of the mobile relay, a first terminal, or a second terminal, transmitting setting information on the optimal values to at least one of the first terminal and the second terminal, and performing the bidirectional inter-terminal communication on the basis of the optimal values. The predetermined variables include at least one of a position of the mobile relay, a speed of the mobile relay, acceleration of the mobile relay, a downlink transmission power of the mobile relay, an uplink transmission power of the first terminal, an uplink transmission power of the second terminal, or a transmission resource allocation ratio for uplink and downlink.

Method and device for performing bidirectional communication using mobile relay in wireless communication system

The present invention relates to a 5th-generation (5G) or pre-5G communication system which is provided for supporting a higher data transfer rate after a 4th-generation (4G) communication system such as a long term evolution (LTE). The present invention provides a method for selecting, by an access point (AP), a beam in a communication system supporting a beamforming scheme, the method comprising: a step of transmitting information which indicates whether or not a duplicated beacon transmission interval (BTI) is operated; and a step of performing a transmit sector sweep (TXSS) process at least twice during the duplicated BTI.

Apparatus and method for selecting beam pattern in communication system supporting beamforming scheme

The present invention relates to a method for allocating transfer times of a low degree of complexity for improving physical-layer security in a wireless powered communication network. A method for allocating transfer times in a wireless powered communication network according to an embodiment of the invention can provide a low-complexity method of allocating transfer times that enables physical-layer security in a secure wireless powered communication network (WPCN) using an energy harvesting jammer, and this method can be utilized to establish an energy harvesting communication system that is efficient in terms of information security.

Method for allocating transfer times in a wireless powered communication network

Disclosed is a signal transmission method. The signal transmission method includes the steps of: setting a default value for generating a beamforming vector to be used for precoding; performing a calculation process of an outer layer for determining whether an accuracy of an energy efficiency satisfies a first threshold value range during a dual layer calculation process for maximizing an energy efficiency of a base station; performing a calculation process of an inner layer for calculating a predetermined second threshold value on which deterministic equivalence of a channel gain matrix coverage; generating a beamforming vector on the basis of values used in the calculation process of the outer layer and the calculation process of the inner layer, when the accuracy of the energy efficiency satisfies the first threshold value range in the calculation process of the outer layer; generating a transmission signal using the beamforming vector; and transmitting the generated transmission signal.

Method for transmitting signal through energy efficiency optimization and base station

The present invention relates to a method for selecting transmitting and receiving antennas in a full-duplex MIMO system based on channel information. An embodiment of the present invention provides a method for selecting antennas in a full-duplex MIMO wireless communication system for communication between a first node and a second node. The method may include: calculating the number of transmitting antennas and the number of receiving antennas at a node i having an Nnumber of antennas such that Nhas a maximum value, where Nrepresents the number of all possible antenna set candidates, N is a natural number of 2 or higher with Nbeing the sum of transmitting antennas and receiving antennas at said node i, and i is 1 or 2; and determining transmitting antennas and receiving antennas at node i in consideration of the transmission rate.

Method for selecting antennas in full-duplex MIMO system

A UE is able to transmit a feedback signal to at least one of multiple BSs in a multi-cell cooperative communication system including the multiple BSs. The UE performs a method that includes: allocating a feedback resource for transmission of the feedback signal to the at least one BS in view of distances between the multiple BSs and the UE; creating feedback resource allocation information representing the result of the feedback resource allocation; and transmitting the created feedback allocation information to the multiple BSs.

Method and device for transmitting/receiving feedback signal in multi-cell cooperative communication system

The present disclosure relates to a pre-5-generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4-generation (4G) communication system such as long term evolution (LTE). Disclosed are an apparatus and a method for a permutation of a block code in a wireless communication system. A method of operating a transmitting node in a wireless communication system includes: determining a permutation matrix according to a block code scheme; generating symbols corresponding to a plurality of antennas based on the block code scheme and the permutation matrix; and transmitting the symbols to a receiving node through the plurality of antennas. The permutation matrix is determined based on a number of blocks and an arrangement structure of the plurality of antennas, and the number of blocks comprises a number of sub-blocks within a code block corresponding to the permutation matrix.

Apparatus and method for permutation of block code in wireless communication system

A method for transmitting and receiving a signal of a terminal, according to an embodiment of the present invention includes the steps of: receiving a signal from a base station; calculating an expected value of the signal to interference plus noise ratio (SINR) based on the received signal; and choosing a beamforming method based on the expected value of SINR. The present invention can provide a method and an apparatus which apply adaptive ICIC in CoMP environment so as to maximize WSR with reduced complexity of calculation, thus having a performance comparable to that determined by the conventional method, and providing the user with a smooth communication environment with improved quality. Furthermore, a terminal communicating with a base station chooses a desirable beamforming technique with reduced complexity so as to decrease the complexity of the system and to provide higher power efficiency with a faster calculation speed. Besides, it is possible for a base station to readily choose the user group and the beamforming technique group with the optimum communication environment.

Method for eliminating interference between cells in wireless communication system and apparatus thereof

Provided are a method and device for processing an uplink (UL) signal in a WLAN system. An access point (AP) receives a request to send (RTS) frame from one station (STA) among a plurality of STAs, transmits a group identifier (ID) of a group to which STAs for performing UL multi user multiple-input multiple-output (MU-MIMO) transmission together with the one STA, among group IDs of a group to which the one STA belongs, and receives UL signals from the STAs which perform the UL MU-MIMO transmission such that the received UL signals are processed.

Method and device for processing uplink signal in WLAN system

A method of determining a filter of a relay and the relay for performing the same are disclosed. The method of determining a filter of a relay to minimize data estimation error in a relay environment considering a direct link includes (a) setting a power constraint condition of the relay so that maximum value of eigenvalue of a transmission covariance matrix of the relay is less than maximum transmission power usable at respective antenna; and (b) determining a transmission filter of the relay using the maximum transmission power usable at respective antenna according to the set power constraint condition.

Method of determining a filter of a relay and relay for performing the same

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Seoul, South Korea

Inkyu Lee