Abstract: A surface plasmon resonance imaging apparatus is provided. The surface plasmon resonance imaging apparatus includes a light irradiation unit configured to irradiate polarized light onto a metal coating film provided on one surface of a prism, a light modulator configured to spatially pattern-encode light reflected by the metal coating film and the prism, a light detector configured to detect a pattern-encoded light signal, obtained through pattern-encoding by the light modulator, as a spectral signal, a signal processor configured to spatially decode the spectral signal and analyze a decoded spectral signal to generate characteristic data of a sample provided on the metal coating film, and an output unit configured to output the characteristic data of the sample as a two-dimensional (2D) image.

Abstract: There is provided a ferritic lightweight steel which contains 2.0 to 3.0 wt % manganese (Mn), 5.0 to 6.0 wt % aluminum (Al) and 0.1 to 0.3 wt % carbon (C) and has a tensile strength of 900 MPa to 1,108 MPa. The lightweight steel includes ferrite-austenite dual grains as a result of performing low-temperature tempering-induced partitioning (LTP) at 300° C. for 10 minutes after isothermal annealing.

Abstract: Embodiments of the present disclosure provide an active terminal detection method and an active terminal detection device that increase the performance of determining whether a terminal is active by designing a spread code to reduce a cross-correlation value of the spread code of a terminal with a high activation frequency in a massive machine-type communication environment by using deep learning.

Abstract: Disclosed herein is an optical device for augmented reality capable of providing an expanded eyebox through polarization. The optical device for augmented reality includes: an image output unit configured to output a first virtual image light polarized in a first direction and a second virtual image light polarized in a second direction; an optical means configured to transmit real object image light therethrough to the pupil of an eye of a user; a first optical element disposed in the optical means, and configured to provide a first virtual image by transferring only the first one of the first and second virtual image lights to the pupil of the user; and a second optical element disposed in the optical means, and configured to provide a second virtual image by transferring only the second one of the first and second virtual image lights to the pupil of the user.

Abstract: The disclosure relates to a non-dispersive infrared (NDIR) gas sensor which detects the concentration of gas with a simple structure and method by manufacturing an optical waveguide with a gas-permeable polymer material instead of a conventional cavity or chamber type. An optical signal travels through the optical waveguide of gas-permeable polymer by total internal reflection, and the gas naturally penetrates the optical waveguide without the use of separate inlet and outlet openings, so that the optical signal and gas particles come into contact with each other within the optical waveguide. Since the optical signal detected by a photodetector at the other end of the optical waveguide after traveling while contacting the gas particles has properties changed according to the concentration of the gas which they have contacted in the optical waveguide, it is possible to measure the concentration of a specific gas from the detected optical signal.

Abstract: A core-shell copolymer, a method of making the same, and a thermoplastic resin composition including the same are disclosed herein. In some embodiments, a core-shell copolymer includes a core and a shell surrounding the core, the core includes a conjugated diene-based monomer-derived repeating unit and a phosphate-based cross-linking agent-derived cross-linking part represented by Formula 1, and the shell includes a first alkyl (meth)acrylate monomer-derived repeating unit, a second alkyl (meth)acrylate monomer-derived repeating unit, and a sulfonate-based ionic monomer-derived repeating unit represented by Formula 2. The core is 68 parts to 92 parts and the shell is 8 parts to 32 parts, based on 100 parts of the core-shell copolymer, the core has a swell index of 2.7 to 10.9, the shell includes 1 wt % to 16 wt % of the sulfonate-based ionic monomer-derived repeating unit, and the shell has a weight average molecular weight of 105,000 g/mol to 645,000 g/mol.

Abstract: An embodiment of the present invention relates to a method in which a first terminal transmits/receives a message including platoon information in a wireless communication system. The method include: a step for receiving, by a first terminal, resource information from a second terminal in a terminal group forming a platoon; a step of transmitting, by the first terminal, a Cooperative Awareness Message (CAM) including the platoon information after receiving the resource information, wherein when the platoon information is for a terminal not belonging to the terminal group, the first terminal transmits the CAM message through a resource instructed in the resource information.

Abstract: The present invention relates to a system and an apparatus for providing beamforming vector for a very high density cellular networks, a method, a program and a recording medium using thereof a transmitter that comprises a plurality of cell and an apparatus for providing beamforming vector, wherein the apparatus for providing beamforming vector controls a signal transmission of each of the plurality of cell; the apparatus for providing beamforming vector that defines a probability (?) for an interference cancelation, expresses a network-wide sum rate as a function of ?, calculates a value of ? that maximizes the network-wide sum rate and calculates a range of a magnitude of an interference channel to be canceled corresponding the value of ?; and a receiver that receives a signal from the transmitter and comprises at least one mobile station and nullifies the range of the magnitude of the interference channel to be canceled.

Abstract: The present invention relates to a system and an apparatus for providing beamforming vector for a very high density cellular networks, a method, a program and a recording medium using thereof. A transmitter that comprises a plurality of cell and an apparatus for providing beamforming vector, wherein the apparatus for providing beamforming vector controls a signal transmission of each of the plurality of cell; the apparatus for providing beamforming vector that defines a probability (?) of interference cancelation, expresses a network-wide sum rate as a function of ?, calculates a value of ? that maximizes the network-wide sum rate and calculates magnitude of canceled interference channel corresponding the value of ?; and a receiver that receives a signal from the transmitter and comprises at least one mobile station and designs the beamforming vector that maximizes the network-wide sum rate by using ?.

Abstract: A multiple-input multiple-output (MIMO) communication method and apparatus are provided. A MIMO communication apparatus includes a selected beamforming vector determining unit to determine a selected beamforming vector corresponding to a selected user, a performance information generating unit to generate performance information corresponding to where a non-selected beamforming vector is allocated to a non-selected user, and an additional beamforming vector selecting unit to select an additional beamforming vector corresponding to the non-selected user based on the performance information.

Abstract: In a multi-user multiple input multiple output (MIMO) communication system using the same radio resource, a unitary matrix may be generated to remove interference signals and enhance a transmission capacity. The unitary matrix may be used for precoding. Vectors included in the unitary matrix may have a most similar direction to precoding vectors of target terminal devices and may be orthogonal to each other.

Abstract: A base station apparatus and method of transmission of dynamic feedback channel information in a MIMO system. The base station apparatus includes a first channel state information receiving unit to receive a first channel state information; a receiving terminal selection unit to select at least one receiving terminal to receive data from among a plurality of terminals; a quantization length determination unit to independently determine a second quantization length of the selected receiving terminal; a quantization length transmission unit to transmit the second quantization length to the selected e receiving terminal; a second channel state information receiving unit to receive second channel state information from the selected receiving terminal; and a data transmission unit to transmit data to the selected receiving terminal using a plurality of transmission antennas of a base station based on the second channel state information.

Abstract: A transmission/reception apparatus and method for reducing the amount of feedback information transmitted from a receiver in a multi-user MIMO system are provided. A transmitter determines a reference Channel Quality Information (CQI) and transmits the reference CQI to the receiver. Upon receipt of the reference CQI, the receiver compares the received reference CQI with a CQI of a stream received from the transmitter, sets a channel, over which the stream is received, to at least one of Activation and Inactivation, according to the comparison result, and transmits the set channel information to the transmitter. As a result, the receiver, even though it receives multiple streams from the transmitter, transmits to the transmitter the at least one of Activation and Inactivation information of the channel separately for each individual stream, thereby contributing to a reduction in the total amount of feedback information.

Abstract: In a multi-user multiple input multiple output (MIMO) communication system using the same radio resource, a unitary matrix may be generated to remove interference signals and enhance a transmission capacity. The unitary matrix may be used for precoding. Vectors included in the unitary matrix may have a most similar direction to precoding vectors of target terminal devices and may be orthogonal to each other.

Abstract: Disclosed is a method and apparatus for transmitting data in a cellular communication system including at least one base station that communicates with a plurality of mobile stations through a given frequency band. The method and apparatus divides the frequency band into at least two subcarrier groups each including a plurality of subcarriers; allocates at least one subcarrier group to each mobile station, and changes the subcarrier group allocated to each mobile station according to a predetermined period; and codes data to be transmitted to each mobile station with a plurality of codes, and transmits modulation symbols obtained by performing inverse fast Fourier transform (IFFT) on a plurality of subcarriers of the allocated subcarrier group.

Abstract: A method for transmitting and receiving data in a multiuser Multiple-Input Multiple-Output (MIMO) system including a base station connected to a plurality of user equipments. In the method, each of the user equipments separately calculates channel capacity information using a linear reception scheme and a nonlinear reception scheme, and feeds back the calculated channel capacity information to the base station. The base station separately calculates system capacities using at least two different antenna scheduling schemes based on the channel capacity information fed back from the user equipments, and allocates antennas to the user equipments using a selected antenna scheduling scheme having higher system capacity out of the two antenna scheduling schemes.

Abstract: A multiple-input multiple-output (MIMO) communication system is provided for communication between a transmission apparatus having a plurality of transmission antennas and a reception apparatus having a plurality of reception antennas. The reception apparatus performs singular value decomposition (SVD) on channel information for a channel established to the transmission apparatus, and feeds back the SVD-decomposed channel information to the transmission apparatus. The transmission apparatus receives the SVD-decomposed channel information from the reception apparatus, performs QR decomposition on the received SVD-decomposed channel information, and sets multiple transmission antennas to be allocated to the channel, thereby performing beamforming.

Abstract: A method and system are provided for transmitting data in a multiple-input multiple-output (MIMO) communication system. A receiver sets the number of sub-streams of each column of a preceding matrix with respect to all precoding matrices of channels formed between the receiver and a transmitter and measures channel states with respect to sub-stream combinations whose number is equivalent to the number of set sub-streams. The receiver transmits data according to channel states to the transmitter after measuring the channel states with respect to the sub-stream combinations and antenna combinations representing sub-streams used upon data transmission of all the precoding matrices.

Abstract: A base station apparatus and method of transmission of dynamic feedback channel information in a MIMO system. The base station apparatus includes a first channel state information receiving unit to receive a first channel state information; a receiving terminal selection unit to select at least one receiving terminal to receive data from among a plurality of terminals; a quantization length determination unit to independently determine a second quantization length of the selected receiving terminal; a quantization length transmission unit to transmit the second quantization length to the selected e receiving terminal; a second channel state information receiving unit to receive second channel state information from the selected receiving terminal; and a data transmission unit to transmit data to the selected receiving terminal using a plurality of transmission antennas of a base station based on the second channel state information.

Abstract: An apparatus and method for performing beamforming or transmitting a plurality of bit streams output through Adaptive Modulation and Coding (AMC) via a plurality of transmission antennas in a base station using a multi-antenna scheme. The apparatus and method include classifying the plurality of transmission antennas into a plurality of transmission antenna groups; selecting one of the transmission antenna groups depending on a group selection signal being fed back from a mobile station; and outputting each of the bit streams to its associated transmission antenna among the transmission antennas constituting the selected transmission antenna group.