Oh, Daejeon-City
Cheon In Oh, Daejeon-City KR
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20100150042 | APPARATUS AND METHOD OF TRANSMITTING AND RECEIVING WAKE-UP SIGNAL - Provided are an apparatus and method of transmitting and receiving a wake-up signal. The method of receiving a wake-up signal includes the following: operating a radio frequency (RF) receiving unit that receives a wireless signal through an antenna during an SFD detecting time, wherein the SFD detecting time is shorter than a predetermined SFD detecting time period, according to the predetermined SFD detecting time period and detecting a start of frame delimiter (SFD) to indicate that the received wireless signal is a wake-up signal to wake-up a node in a sleep mode; and detecting the wake-up signal by continuously operating the RF receiving unit when the SFD is detected. Power consumption that is used to receive the wake-up signal can be reduced. | 06-17-2010 |
Dae-Kon Oh, Daejeon-City KR
Hyun-Seo Oh, Daejeon-City KR
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20090207890 | Diversity transmitter-receiver in cdma system using space-time code, and method thereof - A diversity transmitting/receiving apparatus and method is provided, which is implemented using space-time trellis codes (STTC) constructed from a Pseudo Noise (PN) sequence set in a Direct Sequence (DS) CDMA system. The transmitter comprises a PN sequence generator, a space-time encoder, first and second modulators, and first and second multiple transmit antennas. The space-time encoder selects two of the multiple PN sequences to construct STTC, and space-time encodes data from a data source according to the STTC to output an Wary data symbol. The two modulators modulate the space-time encoded data according to the STTC. The two multiple transmit antennas wirelessly transmit outputs of the two modulators, respectively. By applying a method using space-time coding in a DS CDMA system including multiple transmit antennas, it is possible to achieve both diversity and additional coding gain and also to reduce multiple user interference by increasing the PN sequence length. | 08-20-2009 |
Jong-Ee Oh, Daejeon-City KR
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20080225975 | Structured Space-Time Code Achieving the Full Diversity and Full Rate and Generating Method Thereof, and Multi-Input Multi-Output System - A space-time code used for a transmitter to transmit a plurality of data symbols to a receiver in a MIMO system, the space-time code including a code word matrix for transmitting an amount of data symbols corresponding to a product of the number of transmit antennas and a spatial multiplexing rate during one block period, wherein a row index indicates combined signals transmitted through different transmit antennas and a column index indicates time slots that correspond to the number of transmit antennas, and wherein the number of data symbols allocated to each transmit antenna in a code block corresponds to the spatial multiplexing rate, and the data symbols are combined by different combining coefficients for each transmit antenna at every time slot, and simultaneously transmitted through different transmit antennas, and each transmit antenna transmits a different set of data symbols at every time slot. | 09-18-2008 |
20080240276 | Multi-Input Multi-Output System For Enhancing Transmission Performance - The present invention relates to a multi-input multi-output (MIMO) system for enhancing transmission performance. The MIMO system uses space-time encoding and transmit antenna selection methods, and includes a transmitter ( | 10-02-2008 |
20100037119 | APPARATUS AND METHOD FOR UPDATING CHECK NODE OF LOW-DENSITY PARITY CHECK CODES - An apparatus and method for updating a check node of a low-density parity check (LDPC) code in order to decode the LDPC code are provided. The method includes the operations of: (a) obtaining a first bit of a first minimum value among input values, the number of input values being equal to the number of degrees of the check node, by performing an AND operation on first bits of the input values, the first bits being most significant bits of the input values; (b) obtaining result values by switching and sequentially performing an XOR operation and an OR operation on the first bit of the first minimum value and each of the first bits of the input values; and (c) performing operations (a) and (b) on the result values set as input values and performing operations (a) and (b) a number of times corresponding to the number of bits of each input value, that is, repeating until last bits are set as input values, to thereby obtain the first minimum value, the last bits being least significant bits of the input values. Accordingly, the complexity of hardware is reduced, and super high-speed processing is possible. | 02-11-2010 |
20100325511 | METHOD OF GENERATING PARITY-CHECK MATRIX, ENCODING/DECODING METHOD FOR LOW DENSITY PARITY-CHECK CODE WITH VARIABLE INFORMATION LENGTH AND VARIABLE CODE RATE AND APPARATUS USING THE SAME - A method of generating a parity-check matrix of a low density parity-check (LDPC) code with a variable information length and a variable code rate, an encoding/decoding method, and an apparatus using the same are provided. The method of generating a parity-check matrix of an LDPC code includes: a first parity-check matrix generation process of generating a first parity-check matrix constructed with a first information block and a parity block; and an m-th parity-check matrix generation process of generating an m-th parity-check matrix by an m-th information block to a generated (m−1)-th parity-check matrix (112-23-2010 | |
Joo-Seok Oh, Daejeon-City KR
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20080237545 | Advanced Anisotropic Insulated Conductive Ball For Electric Connection, Preparing Method Thereof and Product Using the Same - Disclosed are anisotropic conductive balls for electric connection comprised of conductive balls and insulation resin layers coating the surfaces of those conductive balls. The conductive balls are coated with a core-shell-structured emulsion-phase or suspension-phase or water-dispersible resin to form insulation resin layers as the shells of the insulation resin layers are coated with resin layers having the water-emission ability. Also disclosed are methods of manufacturing anisotropic conductive balls for electric connection as well as the products using them. Although the surfaces of the anisotropic conductive balls are coated with single- or multi-layered insulation resin layers, they show superior alive and insulation characteristics. | 10-02-2008 |
Kwang-Ryong Oh, Daejeon-City KR
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20110150406 | Reflective semiconductor optical amplifier (R-SOA) and superluminescent diode (SLD) - Provided are a reflective semiconductor optical amplifier (R-SOA) and a superluminescent diode (SLD). The R-SOA includes: a substrate; an optical waveguide including a lower clad layer, an active layer independent of the polarization of light, and an upper clad layer sequentially stacked on the substrate, the optical waveguide comprising linear, curved, and tapered waveguide areas; and a current blocking layer formed around the optical waveguide to block a flow of current out of the active layer, wherein the linear and curved waveguide areas have a single buried hetero (BH) structure, and the tapered waveguide area has a dual BH structure. | 06-23-2011 |
Myoung Sook Oh, Daejeon-City KR
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20090140291 | PHOTO-DETECTOR FOR DETECTING IMAGE SIGNAL OF INFRARED LASER RADAR AND METHOD OF MANUFACTURING THE SAME - A photo-detector, in which metal wiring for connecting electrodes is arranged on a planarized surface and thus the metal wiring arrangement is simplified, and a method of manufacturing the same are provided. The photo-detector includes a multi-layer compound semiconductor layer formed on a compound semiconductor substrate. A number of p-n junction diodes are arranged in a regular order in a selected region of the compound semiconductor layer, and an isolation region for individually isolating the p-n junction diodes is formed by implanting impurity ions in the multi-layer compound semiconductor layer. The isolation region and the surface of the compound semiconductor layer are positioned on the same level. The isolation region may be a Fe-impurity region. | 06-04-2009 |
20090239328 | PHOTO-DETECTOR FOR DETECTING IMAGE SIGNAL OF INFRARED LASER RADAR AND METHOD OF MANUFACTURING THE SAME - A photo-detector, in which metal wiring for connecting electrodes is arranged on a planarized surface and thus the metal wiring arrangement is simplified, and a method of manufacturing the same are provided. The photo-detector includes a multi-layer compound semiconductor layer formed on a compound semiconductor substrate. A number of p-n junction diodes are arranged in a regular order in a selected region of the compound semiconductor layer, and an isolation region for individually isolating the p-n junction diodes is formed by implanting impurity ions in the multi-layer compound semiconductor layer. The isolation region and the surface of the compound semiconductor layer are positioned on the same level. The isolation region may be a Fe-impurity region. | 09-24-2009 |
Sangchul Oh, Daejeon-City KR
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20100138022 | APPARATUS FOR CONTROLLING COMPONENT OF APPLICATION AND METHOD THEREOF - An apparatus for controlling components of an application includes an assembly controller that outputs a driving control signal by using an application, at least one component, and a resource factory that controls the driving of the component based on the driving control signal output from the assembly controller, wherein the resource factory confirms the workload of a component in the corresponding resource factory and senses the congestion situation according to the workload of the component to control the number of components in the corresponding resource factory. | 06-03-2010 |
20100138473 | COMMUNICATION APPARATUS OF APPLICATION FOR SERVING COMMUNICATION OF RELAY NODE AND METHOD OF THE SAME - Provided are a communication apparatus of an application for serving communication of a relay node and a method thereof, includes: a plurality of component groups that are configured to perform work by at least one built-in component and correspond to each plurality of different applications; and an assembly controller that outputs control signals to at least one of the plurality of component groups, the plurality of component groups being packaged by setting the connection between each component group. With this, in fabricating application for serving the communication of the relay node that simultaneously needs at least two applications, the application package in a type where each application is combined can be simply and easily fabricated while using the existing application package as it is and since the present invention uses the existing application package as it is, it can perform the applications alone without modifying each application. | 06-03-2010 |
Sewon Oh, Daejeon-City KR
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20110006884 | RFID INTERROGATOR CALCULATING ADAPTIVE RETRANSMISISON WAIT TIME AND CONTROL METHOD THEREOF - As an RFID interrogator calculating an adaptive retransmission wait time and a control method thereof, the RFID interrogator includes a collision diagnosis unit that analyzes data on a received signal received during a receive time in correspondence with a transmitted signal from an RF communication unit that can transmit and receive signal to and from one or more tag, verifies whether or not a collision occurs in the received signal, and diagnoses a collision type depending on an analysis result of the data on the received signal; a situational command retransmission portion that determines whether or not the command is retransmitted on the basis of the occurrence of the collision and the collision type received from the collision diagnosis unit; and a random wait time calculation portion that calculates a random wait time for retransmitting the command. | 01-13-2011 |
20110006885 | RFID INTERROGATOR RETRANSMITTING COMMAND DEPENDING ON COLLISION SITUATION AND CONTROL METHOD THEREOF - As an RFID interrogator transmitting a command depending on a collision situation and a control method thereof, the RFID interrogator includes a collision diagnosis unit that analyzes data of a received signal received during a receive time in correspondence with a transmitted signal from an RF communication unit that can transmit and receive signal to and from one or more tag, verifies whether or not a collision occurs in the received signal, and diagnoses a collision type depending on an analysis result of the data of the received signal; and a collision resolution unit that can retransmit a command to the tag through the RF communication unit depending on the collision situation on the basis of whether or not occurrence of the collision or not and the collision type that are received from the collision diagnosis unit. | 01-13-2011 |
20110018691 | RFID INTERROGATOR HAVING COLLISION TYPE IDENTIFICATION FUNCTION AND CONTROL METHOD THEREOF - Disclosed is an RFID interrogator having a collision type identification function and a control method thereof. It verifies whether or not a collision occurs in a received signal by analyzing data of a signal received from an RF communication unit and performs a corresponding collision resolution operation by diagnosing a collision type in accordance with a collision generation means between the corresponding RFID interrogator and other interrogators or a tag. Since all types of collisions that occur between the RFID interrogator and the tag can be identified, a reason for occurrence of the collisions can be rapidly recognized to cope with the reason for the collisions. | 01-27-2011 |
20110084811 | RFID TAG FOR RFID SERVICE AND RFID SERVICE METHOD THEREOF - Disclosed are an RFID tag for an RFID service and an RFID service method thereof. The present invention includes a tag storage unit including a TID memory and a user memory; and a tag controller that inserts and stores a content name field including content name information related to an item attached with the corresponding tag in the user memory, wherein the tag controller inserts the content name information in a tag response signal according to the request of a peripheral RFID interrogator and transmits it or permits an access to the memory in which the content name field is inserted. The present invention includes and stores the content name information in the identification data stored in the RFID tag to allow a user to select only the desired tag when the interrogator simultaneously recognizes a plurality of tags and receive the desired contents through the network, making it possible to give convenience to a user and reduce time and the using fee of the network. | 04-14-2011 |
Soo Young Oh, Daejeon-City KR
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20100240967 | BELT WITH HEALTH MANAGEMENT FUNCTION - A belt with a health management function includes a health information extraction module extracting health related information from various biomedical signals, a buckle housing the health information extraction module, and a strap connected to an end of the buckle. The health information extraction module includes a sensor module detecting various biomedical signals, and a process/extraction unit digitally processing the detected biomedical signals and extracting the health related information from the processed digital signals. | 09-23-2010 |
20110094558 | GREENHOUSE USING TRANSPARENT SOLAR BATTERY - Provided is a greenhouse including transparent solar batteries disposed on an outer wall of the greenhouse. Since the transparent solar batteries are disposed on an outer wall of the greenhouse, the greenhouse may generate pollution-free energy while allowing greenhouse cultivation. | 04-28-2011 |
Su Hwan Oh, Daejeon-City KR
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20110150406 | Reflective semiconductor optical amplifier (R-SOA) and superluminescent diode (SLD) - Provided are a reflective semiconductor optical amplifier (R-SOA) and a superluminescent diode (SLD). The R-SOA includes: a substrate; an optical waveguide including a lower clad layer, an active layer independent of the polarization of light, and an upper clad layer sequentially stacked on the substrate, the optical waveguide comprising linear, curved, and tapered waveguide areas; and a current blocking layer formed around the optical waveguide to block a flow of current out of the active layer, wherein the linear and curved waveguide areas have a single buried hetero (BH) structure, and the tapered waveguide area has a dual BH structure. | 06-23-2011 |