Abstract: Disclosed is an apparatus and a method for signal transmission and reception according to a pre-processing scheme in a MIMO mobile communication system. The method includes: inputting a symbol; and pre-processing the input symbol according to a pre-processing matrix corresponding to pre-processing matrix information and transmitting the pre-processed symbol through a corresponding transmission antenna, wherein the pre-processing matrix is determined in accordance with a number of transmission antennas and a rate used in the MIMO mobile communication system.

Abstract: An apparatus and method for performing sequential scheduling in a multiple-input, multiple-output (MIMO) system is provided. The method includes the steps of: selecting a user which reports the greatest partial feedback information among a plurality of pieces of partial feedback information of all users in an initialization operation, and requesting channel feedback information to the selected user; and broadcasting the channel feedback information of the selected user to remaining unselected users upon receiving the channel feedback information from the selected user. Accordingly, a maximum capacity can be obtained by using only selective channel feedback information without having to feed back channel state information of all users.

Abstract: A toner supply roller of an electrophotographic imaging apparatus and a method of preparing the toner supply roller are provided. The toner supply roller includes a polyurethane foam, and a metal shaft inserted in the polyurethane foam along an axis thereof, wherein the polyurethane foam includes an ion-conductive agent and a binder, and the binder includes a resin having an amide bond. Accordingly, the toner supply roller including polyurethane foam provides an improved toner supply and prevents image defects.

Abstract: An apparatus and a method for efficient resource allocation using a cognitive radio communication in Orthogonal Frequency Division Multiple Access (OFDMA)-based moving networks are provided. The method includes determining a minimum transmit power value of the MRS, which enables the internal terminal to have a receive Signal to Interference and Noise Ratio (SINR) greater than a first threshold; determining a transmit power value of the MRS by taking into account the determined minimum transmit power value; determining a transmit power value of the MRS per cellular terminal, which is transmittable at maximum while exerting interference less than a second threshold on a corresponding cellular terminal; searching one or more cellular terminals having the maximum transmittable transmit power value determined per cellular terminal greater than the determined transmit power value; and borrowing and allocating a resource allocated to the searched cellular terminal to the internal terminal.

Abstract: Provided is a method, and an apparatus and communication system to perform the method, of detecting a victim terminal and performing an interference coordination in a multi-cell environment. The multi-cell environment may include a heterogeneous cell environment including a small cell and a macro cell. The method includes determining whether a macro terminal is located within a cell coverage of a small base station, and adjusting the cell coverage according to the determination.

Abstract: Provided is a capacitive touch-screen panel. The capacitive touch-screen panel includes a first substrate having a screen region and an inactive region, a first transparent electrode pattern unit disposed in the screen region of a first lateral surface of the first substrate, a first outer electrode interconnection formed in the inactive region of the first lateral surface of the first substrate and electrically connected to the first transparent electrode pattern unit, a second substrate having a first lateral surface bonded with a second lateral surface of the first substrate using an interlayer adhesive, the second substrate having a screen region and an inactive region, a second transparent electrode pattern unit disposed on the screen region of a second lateral surface of the second substrate, and a second outer electrode interconnection formed in the inactive region of a second lateral surface of the second substrate and electrically connected to the second transparent electrode pattern unit.

Abstract: Disclosed is a method of manufacturing a charging roller useable in an electrophotographic image forming apparatus and a charging roller manufactured according to the method. The method includes introducing a conductive agent and a mixture of a rubber-based material and polyolefin-based resin into an extruder, extruding the conductive agent and the mixture to obtain an extrudate, crosslinking the extrudate by electron beam irradiation, and polishing the crosslinked extrudate. The method results in an environmentally friendly and simplified manufacturing processes, and/or in the reduction of the manufacturing costs.

Abstract: Provided is a method of fabricating a capacitive touch-screen panel. The method includes preparing first and second substrates having first lateral surfaces on which first and second transparent conductive layers for forming first and second transparent electrode pattern units are disposed. Each of the first and second substrates has a screen region and an inactive region. Second lateral surfaces of the first and second substrates are bonded to each other by an interlayer adhesive. First and second metal layers for forming first and second outer electrode interconnections are disposed on exposed surfaces of the first and second transparent conductive layers, respectively.

Abstract: An apparatus and method for determining a beamforming vector in a codebook-based transmission beamforming system are provided. In a feedback method for a receiver in a codebook-based transmission beamforming system, forthcoming channel values for a forthcoming period are generated using M present and previous channel estimates. Effective channel gains for all transmission beamforming vectors included in a codebook are calculated using the forthcoming channel values. A codebook index corresponding to the maximum effective channel gains is fed back to a transmitter.

Abstract: An actuator used with an optical pickup includes: a base on which a holder is fixed; a lens holder in which a plurality of installation holes are formed such that a plurality of objective lenses to record and/or reproduce optical discs having different recording densities are installed at different heights; a support member, which movably supports the lens holder, having one end coupled to the lens holder and the other end coupled to the holder; and a magnetic circuit which drives the lens holder in focusing and tracking directions. The plurality of installation holes include a first installation hole in which a first objective lens for at least one type of low density optical disc is installed, and a second installation hole in which a second objective lens for a higher density optical disc than the low density optical disc is installed.

Abstract: An apparatus and method for implementing SDMA in a multi-user multi-antenna system are provided, in which SDMA users are selected from among total users according to channel state information of the total users, and the number of transmission streams to be allocated to each of the SDMA users is determined by a tree search method.

Abstract: A repeater having different input and output frequencies converts a signal received with the input frequency to a first intermediate frequency signal based on a local oscillating frequency for intermediate frequency conversion, and converts the first intermediate frequency signal to a second intermediate frequency signal by performing digital processing on the first intermediate frequency signal. Then, the repeater generates a first frequency tone signal that corresponds to a difference between the input and output frequencies, and generates a second frequency tone signal from the local oscillating frequency for intermediate frequency conversion and the first frequency tone signal. The repeater up-converts the second intermediate frequency signal to the output frequency based on the second frequency tone signal, and transmits the signal.

Abstract: A method of performing relay communication in a next generation cellular communication system is disclosed. The next generation cellular communication system includes a base station and a plurality of terminals, and a communication target terminal which has not acquired a Line-Of-Sight (LOS) channel with the base station performs communication through the relay of a relaying terminal which has acquired a LOS channel. The base station determines the relaying terminal. The relaying terminal forms a relaying terminal group by determining one or more relaying assistant terminals. The communication target terminal forms a transmitting/receiving terminal group by determining one or more transmitting/receiving assistant terminals. The base station performs communication with the relaying terminal through the relaying terminal, relaying assistant terminals of the relaying terminal group and the transmitting/receiving assistant terminals of the transmitting/receiving terminal group.

Abstract: An optical disc drive, including a main frame a tray disposed such that the tray is to be inserted into or ejected from the main frame to load or unload a disc and a tray holding unit to press bias the tray, when the loading/unloading of the tray is completed, so as to restrict the vertical and lateral movement of the tray when the loading/unloading of the tray is completed.

Abstract: The present invention is related to a beam division multiple access system and a method thereof. The base station according to the present invention comprises a initial mobile station information receiver for receiving initial mobile station information that a mobile station omnidirectionally transmits in an initial communication step, a mobile station location and speed detector for detecting a location and a moving speed of the mobile station from the initial mobile station information, a downlink beam generator for generating a downlink beam based on the location and the moving speed of the mobile station transferred from the mobile station location and speed detector, and adjusting at least one of a width and a direction of each the downlink beam, and a downlink beam transmitter for transmitting the downlink beam generated by the downlink beam generator to the mobile station through a phase array antenna.

Abstract: A developing unit provided in an image forming apparatus includes a regulating member that improves developer layer regulation performance. The developing unit is configured to feed developer to a photoconductor, on which an electrostatic latent image is formed, to form an image. The regulating member of the developing unit includes a bending portion contacting an outer peripheral surface of a developing device provided in a frame of the developing unit. The width of the regulating member is variable to increase rearward from the bending portion. The regulating member may further include an extension portion extending from the bending portion. Sealing members may be attached to both ends of the frame of the developing unit so as to contact the respective ends of the bending portion.

Abstract: A microactuator including a base frame; and a moving plate having both ends supported by a plurality of elastic support portions inside the base frame, the moving plate having a first side on which a reflective mirror for changing a light path is disposed. At least one first rib is disposed along an edge of a second side of the moving plate, which is the reverse side of the first side of the moving plate, and a second rib is disposed in the center of the second side of the moving plate and correspondingly encloses a permanent magnet. Also, a portion of the second side of the moving plate, except for the first and second ribs, is removed to a predetermined depth to reduce the weight of the entire moving plate and to define the first and second ribs.

Abstract: A pilot designing method in an uplink OFDMA system is provided. In the uplink OFDMA system, communications are carried out in a frame divided into time-frequency lattices, and each time-frequency lattice includes a plurality of data symbol periods and a plurality of pilot symbol periods intermittently arranged with respect to the data symbol periods. The frame is divided into a plurality of blocks. The blocks are allocated to the terminals. A predetermined allocated pilot time-frequency lattice is shared between adjacent terminals.

Abstract: An apparatus and a method of performing radio communication are provided. The radio communication apparatus may determine a channel capacity of a radio channel based on a sensing duration to sense the radio channel and a false alarm probability, determine a sensing duration value and a false alarm probability value that maximize the channel capacity, and sense the radio channel based on the determined sensing duration value and the false alarm probability value.

Abstract: A transmission apparatus for a DS/CDMA system including a multiple-input multiple output MIMO antenna system is disclosed. The apparatus includes a transmitter for transmitting data by applying a different scramble code to each transmitted data through a plurality of transmitting antennas. The apparatus also includes a receiver for receiving the transmitted data by obtaining a diversity gain based on the maximum order of the diversity in order to effectively detect the data. The present invention achieves an excellent detection performance by receiving data with a full order of diversity, which is a multiple of the number of receiving antennas and the number of multipath, without complicated operation such as a decision feed equalizer.