Patent application number | Description | Published |
20100158089 | CHANNEL ESTIMATION METHOD AND APPARATUS FOR WIRELESS COMMUNICATION SYSTEM - A channel estimation method and apparatus using a self-tracking algorithm is provided for improving channel estimation accuracy. The channel estimation apparatus of a mobile terminal includes a receiver for converting a received radio signal into a baseband signal, a match filter for converting the baseband signal into a digital signal including at least two samples, a channel estimator for buffering the samples, for analyzing multipath signals to predict a maximum power position and multipath energy, and for estimating a channel by selecting a multi-tap at the maximum power position through a slew control, an equalization controller for calculating an equalization tap gain using the multi-tap selected by the channel estimator, and an equalizer for compensating for distortion in the samples output by the channel estimator using the equalization tap gain calculated by the equalization controller. | 06-24-2010 |
20100166095 | COOPERATIVE DIVERSITY METHOD AND COOPERATIVE DIVERSITY SYSTEM USING OPPORTUNISTIC RELAYING - There are provided a cooperative diversity method and a cooperative diversity system using opportunistic relaying. In cooperative diversity wireless communications, an optimum relay is selected considering an interference effect between adjacent cells, and the selected relay transmits a data signal received from a transmitter to a receiver. Accordingly, an optimum relay is selected considering interference between channels not only in a single cell environment but also a multi cell environment, and a signal is transmitted to a receiver through the selected relay, thereby increasing transmission efficiency and improving reliability. | 07-01-2010 |
20100309890 | CHANNEL ESTIMATION APPARATUS OF MOBILE COMMUNICATION RECEIVER AND TIME TRACKING METHOD FOR CHANNEL ESTIMATION - A time tracking method is provided for channel estimation of a mobile communication receiver and a related channel estimation apparatus is provided. The channel estimation apparatus includes a channel estimation control unit for analyzing and outputting a delay profile of a multipath channel by using a channel estimation value of each multi-tap, a tracking mode control unit for calculating a distance between an earliest tap and a preset margin tap by using the delay profile analysis results, and for generating and outputting a hopping tracking control signal for tracking a position of the earliest tap to a position of the margin tap at a time when the determined distance is greater than a preset hopping threshold value, and a hopping tracking mode execution unit for receiving the hopping tracking control signal and for shifting the position of the earliest tap to the position of the margin tap at a time. | 12-09-2010 |
20110182187 | WIRELESS COMMUNICATION SYSTEM AND METHOD FOR PERFORMING COOPERATIVE DIVERSITY USING CYCLIC DELAY - A wireless communication system and method of performing cooperative diversity using cyclic delay is provided. A transmitting terminal constituting the wireless communication system includes: a data transmitter configured to transmit data to each of at least one relay terminal and a receiving terminal; an error detection result receiver to receive an error detection result from a relay terminal that detects an error in the data among the at least one relay terminal; and a data retransmitter configured to retransmit data to the receiving terminal when it is determined each of the at least one relay terminal detects the error in the data based on the error detection result. | 07-28-2011 |
20110216714 | UPLINK SCHEDULING METHOD USING ONE BIT PER USER FEEDBACK - An uplink scheduling method using one bit per user feedback includes: receiving one-bit feedback of the user's channel condition from a plurality of users, the one-bit feedback of the user's channel condition corresponds to a value of the cumulative distribution function of the user's instantaneous achievable rate; selecting a user from the users whose channel condition is equal to or greater than a predetermined threshold; and transmitting data at an instantaneous achievable rate of the selected user. | 09-08-2011 |
20130299222 | ELECTRODE MEMBER AND TOUCH WINDOW INCLUDING THE SAME - Disclosed is an electrode member. The electrode member includes a substrate, and an electrode provided in the shape of a mesh on the substrate. | 11-14-2013 |
20140014905 | FIELD EFFECT TRANSISTOR USING GRAPHENE - According to example embodiments, a field effect transistor includes a graphene channel layer on a substrate. The graphene channel layer defines a slit. A source electrode and a drain electrode are spaced apart from each other and arranged to apply voltages to the graphene channel layer. A gate insulation layer is between the graphene channel layer and a gate electrode. | 01-16-2014 |
20140029298 | OPTICAL MEMBER AND DISPLAY DEVICE INCLUDING THE SAME - Disclosed are an optical member and a display device including the same. The optical member includes a receiving member; a host in the receiving member; and a plurality of wavelength conversion particles distributed in the host. The receiving member includes a light incident part having a first refractive index; and a light exit part having a second refractive index different from the first refractive index. The optical member improves the optical characteristics by adjusting the refractive indexes of the light incident part and the light exit part. | 01-30-2014 |
20140029299 | OPTICAL MEMBER, DISPLAY DEVICE INCLUDING THE SAME, AND METHOD FOR MANUFACTURING THE SAME - Disclosed are an optical member, a display device having the same and a method of fabricating the same. The optical member includes a host; a plurality of light conversion particles dispersed in the host to convert a wavelength of light generated from a light source; and a protective layer surrounding the host and including plastic. | 01-30-2014 |
20140043790 | NANOPARTICLE COMPLEX, LIGHT CONVERSION MEMBER AND DISPLAY DEVICE HAVING THE SAME, AND METHOD FOR FABRICATING THE SAME - Disclosed are a light conversion member, a display device including the same, and a method for fabricating the same. The light conversion member includes a host, a plurality of light conversion particles in the host, and a ferroelectric material in the host. | 02-13-2014 |
20140117313 | GRAPHENE SWITCHING DEVICE HAVING TUNABLE BARRIER - According to example embodiments, a graphene switching devices having a tunable barrier includes a semiconductor substrate that includes a first well doped with an impurity, a first electrode on a first area of the semiconductor substrate, an insulation layer on a second area of the semiconductor substrate, a graphene layer on the insulation layer and extending onto the semiconductor substrate toward the first electrode, a second electrode on the graphene layer and insulation layer, a gate insulation layer on the graphene layer, and a gate electrode on the gate insulation layer. The first area and the second area of the semiconductor substrate may be spaced apart from each other. The graphene layer is spaced apart from the first electrode. A lower portion of the graphene layer may contact the first well. The first well is configured to form an energy barrier between the graphene layer and the first electrode. | 05-01-2014 |
20140133129 | OPTICAL MEMBER, DISPLAY DEVICE HAVING THE SAME, AND METHOD OF FABRICATING THE SAME - Disclosed are an optical member, a display device having the same, and a method of fabricating the same. The optical member includes a receiving part having an empty space therein, a host in the receiving part, a plurality of wavelength conversion particles in the host, a sealing part in the receiving part, and a pre-treatment layer between the sealing part and an inner surface of the receiving part. | 05-15-2014 |
20140213271 | APPARATUS AND METHOD FOR PERFORMING INTER-CELL INTERFERENCE COORDINATION USING LIMITED CHANNEL STATE INFORMATION IN HETEROGENEOUS NETWORK - Disclosed herein are an apparatus and method of performing inter-cell interference coordination in a heterogeneous network. The apparatus includes a reception unit, a determination unit, a generation unit, and a transmission unit. The reception unit receives a modulation and coding scheme (MCS) level from a small cell base station in each frame. The determination unit determines a calculated MCS level based on the MCS level and an interfering signal estimated through probabilistic modeling. The generation unit generates a ratio of subframes, in which data will not be transmitted, to all subframes of a frame based on the MCS level and the calculated MCS level. The transmission unit transmits the ratio and the calculated MCS level to the small cell base station. | 07-31-2014 |
20140284794 | TIN-BASED SOLDER BALL AND SEMICONDUCTOR PACKAGE INCLUDING THE SAME - A tin (Sn)-based solder ball having appropriate characteristics for electronic products and a semiconductor package including the same are provided. The tin-based solder ball includes about 0.3 to 3.0 wt. % silver (Ag), about 0.4 to 0.8 wt. % copper (Cu), about 0.01 to 0.09 wt. % nickel (Ni), about 0.1% to 0.5 wt. % bismuth (Bi), and balance of tin (Sn) and unavoidable impurities. | 09-25-2014 |