Patent application number | Description | Published |
20090016256 | METHOD FOR DETERMINING OPTIMAL TRANSMISSION MODE AND FRAME STRUCTURE FOR MODE DETERMINATION IN RELAY SYSTEM - A method of determining an optimal transmission mode and a data frame structure for determining an optimal transmission mode in a data transmission system using a relay, are provided. Any one of a base station, a relay, and a mobile station determines an optimal transmission mode from among a plurality of transmission modes, and the base station transmits the determined optimal transmission mode by enabling the determined optimal transmission mode to be included in the system information duration of the data frame, so that the overall relay system can transmit data according to the optimal transmission mode. | 01-15-2009 |
20090034408 | APPARATUS AND METHOD OF RECONSTRUCTING AMPLITUDE-CLIPPED SIGNAL - A method and apparatus for compensating a distortion due to a clipped amplitude when an amplitude of a signal is clipped to reduce a peak to average power ratio (PAPR) in a wireless communication system using an orthogonal frequency division multiplexing (OFDM) scheme and a transmit diversity method using an orthogonal coding. | 02-05-2009 |
20090040960 | Space frequency block code signal processing system - A space frequency block code signal relaying system is provided. The space frequency block code signal relaying system includes a signal detecting unit which receives, via a radio channel, a source signal sent from a source station and detects the received signal; a relay signal generation unit which generates a relay signal corresponding with the source signal transmitted from the source station to a destination node based on the received signal, the source signal and the relay signal being signals encoded in a Space Frequency Block Code (SFBC) scheme; and a signal transmitting unit which transmits the relay signal to the destination node. | 02-12-2009 |
20090092182 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SPACE BLOCK CODING SIGNAL THROUGH ITERATIVE MULTI-USER DETECTION - A method and apparatus for transmitting and receiving a space block coding signal through Iterative Multi-user Detection is provided. The apparatus includes a multi-user interference cancellation unit which cancels multi-user interference in a received signal and outputs a first signal and a second signal that are sequentially transmitted from two transmitting antennas, a linear combiner which performs linear combination for the first signal and the second signal, and an equalizer which applies different equalization coefficients to the combined first signal and the second signal, respectively, to perform frequency-domain equalization. | 04-09-2009 |
20090097432 | METHOD FOR SETTING PACKET TRANSMISSION PATH IN AD HOC NETWORK, AND NETWORK APPARATUS USING THE SAME - A method of setting a packet transmission path in a wireless communication network and a network apparatus using the same are provided. A method of setting a packet transmission path includes setting N−1 routing regions including at least one node between a source node and a destination node based on a predetermined N number of hops, N denoting an integer greater than or equal to two, and determining a node in each of the routing regions as a relay node based on a channel gain. | 04-16-2009 |
20090103428 | SYSTEM FOR GENERATING SPACE FREQUENCY BLOCK CODE RELAY SIGNAL AND METHOD THEREOF - A method and system for generating a space frequency block code relay signal includes a signal detection unit which detects a received signal by receiving a first and second source signals transmitted from a first and second source nodes, a relay signal generation unit which generates a relay signal cooperating with the first and second source signals using a space frequency block code (SFBC) scheme based on the received signal, and a signal transmitter which transmits the relay signal to a destination node. | 04-23-2009 |
20090176492 | COMMUNICATION SYSTEM FOR TRANSMITTING DATA USING COOPERATIVE COMMUNICATION RELAY - A mobile station which connects to a base station having a plurality of relays belonging thereto is provided. The mobile station includes a receiving unit which receives a first preamble signal from a first relay and receives a second preamble signal from a second relay, the first relay belonging to a first cluster including an N1 number of relays and the second relay belonging to a second cluster including an N2 number of relays, a control unit which selects the first cluster as an access cluster to connect to the base station, based on the first preamble signal and the second preamble signal, and a transmission unit which transmits an access request message to the first relay, wherein the access request message is transmitted to the base station via the first relay. | 07-09-2009 |
20100136903 | DATA TRANSMISSION SYSTEM FOR TRANSMITTING DATA VIA RELAY HAVING MULTIPLE ANTENNAS - Disclosed is a data transmission system that transmits data using a relay. During a first time slot, a base station may transmit base station data to the relay, and a mobile station may transmit mobile station data to the relay. During a second time slot, the relay may transmit the mobile station data to the base station, and transmit the base station data to the mobile station. | 06-03-2010 |
20100226293 | INTERFERENCE ALIGNMENT SCHEME FOR USE IN COMMUNICATION NETWORK - A communication network applying an interference alignment scheme with a low or reduced complexity is provided. The communication network may include a plurality of transmit nodes and a plurality of receive nodes. A plurality of combinations of transmit-receive pairs may exist between the plurality of transmit nodes and the plurality of receive nodes. A communication apparatus for the communication network may select, from candidate combinations of transmit-receive pairs, a target combination to be applied with the interference alignment scheme. In particular, the communication apparatus may sequentially decrease a number of candidate combinations to select the target combination with a low complexity. | 09-09-2010 |
20100227566 | COMMUNICATION SYSTEM AND METHOD OF PERFORMING INTERFERENCE CONTROL USING RANDOM BEAMFORMING TECHNIQUE - Provided is a communication system using various types of random beamforming technologies. Each of terminals that belong to a user group may generate a decoding matrix, based on interference caused by a neighboring base station of a serving base station. Each of the terminals may transmit, to the serving base station or the neighboring base station, information associated with a signal-to-interference plus noise ratio (SINR) or throughput based on the decoding matrix. The serving base station may select, from the terminals, at least one target terminal to communicate with the serving base station. | 09-09-2010 |
20100227613 | COMMUNICATION SYSTEM OF SELECTIVELY FEEDING BACK INFORMATION ABOUT INTERFERENCE CHANNELS FOR INTERFERENCE ALIGNMENT AND METHOD FOR OPERATING THE SYSTEM - A communication system may include a serving base station and neighboring base stations. Each of the serving base station and the neighboring base stations may have a corresponding user group. Terminals belonging to a particular user group may feed back information associated with interference channels, and reasonably generate a precoding matrix. Through this, it is possible to perform an accurate interference alignment and to enhance a throughput. In this instance, terminals belonging to the other user groups may feed back information associated with a throughput, and a corresponding base station may perform the interference alignment using a user selection resulting in decreased overhead. | 09-09-2010 |
20100227635 | NETWORK APPARATUS AND METHOD FOR SELECTING TARGET TERMINAL TO PERFORM COMMUNICATION ACCORDING TO INTERFERENCE ALIGNMENT SCHEME - Provided is a signal transmission system including a terminal to receive a signal using an interference alignment scheme, and a transmitting base station to transmit, to the terminal, a signal where interference is aligned. The transmitting base station may select, from a plurality of terminals, a target terminal to receive the signal using the interference alignment scheme. The selected target terminal may receive the signal from the transmitting base station and receive interference signals from a plurality of interference base stations. | 09-09-2010 |
20110051837 | COMMUNICATION SYSTEM PERFORMING INTERFERENCE ALIGNMENT AND INTERFERENCE ALIGNMENT METHOD - A communication device and a mobile station to perform interference alignment, and an interference alignment method are provided. Interference alignment may be performed to enable an interference signal, received in a mobile station, to be removed using channel information fed back from the mobile station. | 03-03-2011 |
20110058633 | APPARATUS AND METHOD FOR NON-NETWORK CHANNEL SCANNING IN DIGITAL VIDEO BROADCASTING SYSTEM - An apparatus and a method for commonly applying channel scanning to non-network scanning schemes in a digital video broadcasting system are provided. The method includes deleting all services stored in a database, temporarily storing services scanned through each frequency in a temporary storage unit, and performing channel scanning for all frequencies. Accordingly, the same service including different Logical Channel Numbers (LCNs) that is repeatedly stored or another service including the same LCN that is not stored in a Multi Frequency Network (MFN) boundary area using the non-networking scanning scheme is prevented. | 03-10-2011 |
20110110443 | DATA RECEIVING APPARATUS FOR RECEIVING DATA FRAME USING CONSTELLATION MAPPING SCHEME AND DATA TRANSMISSION APPARATUS FOR TRANSMITTING THE DATA FRAME - Disclosed are a data receiving apparatus that may discriminate a type of a received data frame, and a data transmission apparatus that may apply a constellation mapping scheme to a data frame so that a data receiving apparatus may discriminate the data frame in accordance with the constellation mapping scheme applied to the data frame. | 05-12-2011 |
20110135023 | COMMUNICATION SYSTEM AND METHOD USING SPACE DIVISION MULTI-USER MULTIPLE INPUT MULTIPLE OUTPUT (SD-MIMO) COMMUNICATION METHOD - Provided is a communication system using a space division multi-user multiple input multiple output (SD-MIMO) communication method. A transmission apparatus may transmit, to each of terminals included within a coverage, common control information commonly transmitted to the terminals and individual control information individually transmitted to each of the terminals. The transmission apparatus does not precode the common control information and transmits the non-precoded common control information. The transmission apparatus precodes the individual control information and transmits the precoded individual control information. | 06-09-2011 |
20110199263 | METHOD AND APPARATUS FOR ESTIMATING ANGLE OF ARRIVAL - Provided is a method of an angle of arrival (AoA) estimating apparatus. The AoA estimating apparatus may obtain at least two candidate values for an AoA of a received signal, based on a first steering vector. The AoA estimating apparatus may further detect a second steering vector corresponding to a predetermined rotation angle to which the AoA estimating apparatus rotates, and may determine the AoA based on one of the at least two candidate values, with respect to the second steering vector and the predetermined rotation angle. | 08-18-2011 |
20110243275 | APPARATUSES AND METHODS FOR DATA TRANSMISSION AND RECEPTION - Provided is a data transmission system of providing preambles of different classes according to a characteristic of a terminal. A terminal having constraints on using a power with respect to a data reception may receive only a preamble of a particular class and thus decrease a power consumption. A generally terminal may receive preambles of plural classes and quickly receive data. | 10-06-2011 |
20110270519 | Apparatus and Method for Estimating Relative Location - Provided is a method and an apparatus for estimating a distance from a target terminal, collecting route information of the apparatus and route information of the target terminal, and estimating a relative location to the target terminal based on the route information of the apparatus and the route information of the target terminal. | 11-03-2011 |
20120039316 | METHOD OF GENERATING MAP, AND METHOD OF MEASURING LOCATION OF TERMINAL USING THE MAP - A method of generating a map in a wireless network including a target device, at least two peripheral devices, and a terminal is provided. The target device may obtain relative location information of the at least two peripheral devices with respect to the target device, generate a local map of the target device based on the obtained relative location information, and share information associated with the local map of the target device with the at least two peripheral devices. The target device may further generate a reference map with respect to the target device and the at least two peripheral devices using the local map of the target device and local maps of the at least two peripheral devices, and provide, to the terminal, information associated with the reference map. | 02-16-2012 |
20120040697 | METHOD AND APPARATUS FOR EXPRESSING THE ACCURACY OF A MEASURED LOCATION OF A TERMINAL - Provided is an apparatus and method for expressing an accuracy of a measured location of a terminal. The apparatus may include a storage unit to store accuracy information used for indicating an accuracy of a measured location corresponding to each of possible locations of the terminal. The apparatus may include a location information obtainment unit to obtain information associated with a location of the terminal. The apparatus may include a controller to express an accuracy of a measured location in the location of the terminal or an accuracy of a measured location in an area comprising the location of the terminal, based on the accuracy information. | 02-16-2012 |
20120069176 | APPARATUS AND METHOD FOR GENERATING DEPTH IMAGE - An apparatus and method for generating a depth image are provided. The apparatus includes an optical modulator, an optical sensor, and a depth image processor. The optical modulator optically modulates light which is reflected from an object to which light modulated using a first pseudorandom (PN) sequence is irradiated. The optical modulator optically modulates the reflected light using second PN-sequences, where each of the second PN-sequences has a same PN sequence as the first PN-sequence, but the second PN-sequences have N different time shifts. The optical sensor senses the optically modulated reflective light. The depth image processor samples N intensity images from the optically modulated reflective light sensed by the optical sensor and generates a depth image of the object using the sampled N intensity images. | 03-22-2012 |
20120203451 | APPARATUS AND METHOD FOR INTEGRATED POSITIONING - Provided is an apparatus and method associated with a location based service, and an apparatus for integrated positioning that may sense positioning-associated information that is in proximity to a user. The apparatus may hierarchically classify the sensed positioning-associated information into multiple categories of accuracy based on a predetermined criterion, and estimate the location of the user in order of low accuracy information to more precise accuracy information. | 08-09-2012 |
20120308199 | Method And System For Displaying A Menu Which Has An Icon And Additional Information Corresponding To Stored Image Data, Wherein The Icon Can Display The Image Data With The Additional Information - A menu displaying system and method having an icon for editing image data in an AV (Audio and Video) device, the AV device having a recording medium capable of storing image data and audio data, and which is capable of reproducing image data and audio data. The method comprises steps for displaying icons and additional information corresponding to the image data stored at the recording medium, selecting one of the icons displayed, and reproducing image data corresponding to the selected icon. A corresponding program stored at the AV device having a recording media such as a hard disc drive, is then reproduced upon a menu screen such that image data stored at the AV device can be easily observed. | 12-06-2012 |
20130057260 | METHOD AND APPARATUS FOR MEASURING A LOCATION OF A TERMINAL USING MAGNETIC FIELD - Provided are a method and apparatus for measuring a location of a terminal using a magnetic field. For example, the apparatus may measure a location of a terminal using a magnetic field obtained by a magnetic field sensor and one or more sensor values obtained by a plurality of other sensors. | 03-07-2013 |
20130080048 | METHOD OF CALCULATING ACCURACY OF MEASURING LOCATION, AND METHOD AND APPARATUS FOR MEASURING LOCATION OF TERMINAL USING ACCURACY OF MEASURING LOCATION - A method of calculating an accuracy of measuring a location, and a method and apparatus to measure a location of a terminal using the accuracy of measuring the location, are provided. The method of calculating the accuracy of measuring the location of the terminal includes providing a map corresponding to a location measurement type that is used in the terminal. The method further includes reading, from the map, map information of a predetermined area including the location of the terminal. The method further includes calculating the accuracy of measuring the location with the location measurement type based on the map information. | 03-28-2013 |
20130150076 | MOBILE TERMINAL DEVICE FOR POSITIONING SYSTEM BASED ON MAGNETIC FIELD MAP AND METHOD THEREOF - A mobile terminal device for a positioning system based on a magnetic field map and a method thereof, are provided. The mobile terminal includes a memory configured to store a magnetic field map including magnetic field values at positions. The mobile terminal further includes a magnetic field sensor configured to measure a magnetic field value at a position of the mobile terminal. The mobile terminal further includes an inertial measurement unit (IMU) sensor configured to measure an acceleration value and a gyro value of the mobile terminal. The mobile terminal further includes a processor configured to determine the position of the mobile terminal based on the magnetic field map, the magnetic field value, the acceleration value, and the gyro value. | 06-13-2013 |
20130303185 | METHOD AND APPARATUS FOR OBTAINING LOCATION OF USER - A method of obtaining a location of a user includes obtaining first location information of the user; searching a pre-stored first map for a plurality of candidate areas corresponding to the first location information; selecting at least one search area from the plurality of candidate areas corresponding to the first location information based on second location information of the user; and determining the location of the user using at least one search area. | 11-14-2013 |
20140021942 | METHOD AND APPARATUS FOR CREATING MAGNETIC FIELD MAP BASED ON FLOOR PLAN INFORMATION OF BUILDING - Provided are a method and an apparatus for creating a magnetic field map that extracts magnetic field information of a building from floor plan information of the building. The magnetic field map of the building may be generated based on the floor plan information and the magnetic field information. | 01-23-2014 |
20140025334 | TERMINAL AND SERVER FOR MODIFYING MAGNETIC FIELD AND METHOD THEREOF - A method of estimating a location of a terminal includes measuring a magnetic field value at a location of the terminal, estimating the location of the terminal using the measured magnetic field value, and transmitting the measured magnetic field value and information associated with the estimated location to a server. A method of modifying a magnetic field map includes receiving, from a terminal, a magnetic field value estimated at a location of the terminal, and information associated with a location of the terminal estimated based on the magnetic field value, and modifying a magnetic field map using the measured magnetic field value and the information associated with the estimated location. | 01-23-2014 |
20140073350 | USER TERMINAL AND METHOD FOR PROVIDING SERVICE FOR ESTIMATING LOCATION BASED ON CHANGE IN STATE OF USER TERMINAL - A user terminal and a method for providing a service for estimating a location based on a change in a state of the user terminal, are provided. The method includes sensing a change in a state of a terminal while an application that provides the service of estimating the location is being executed, and extracting one or more resources affected by the change from a plurality of resources to be used to provide the service. The method further includes filtering data corresponding to the one or more affected resources, and providing data to the application based on the filtering. | 03-13-2014 |
20140113664 | METHOD OF SETTING INITIAL LOCATION OF USER TERMINAL VIA INTERACTION WITH USER AND USER TERMINAL - A method of setting an initial location of a user terminal via an interaction with a user and a user terminal is provided. The method includes measuring a magnetic field at a current location of the user terminal, and estimating a candidate initial location of the user terminal based on the magnetic field. The method further includes displaying the candidate initial location, and selecting the candidate initial location. The method further includes setting the initial location based on the selection. | 04-24-2014 |
20140162703 | MOBILE DEVICE FOR ESTIMATING LOCATION USING PARTICLE FILTER GENERATED BASED ON THREE-DIMENSIONAL (3D) MAGNETIC FIELD MAP AND METHOD USING SAID MOBILE DEVICE - A mobile device includes a magnetic field sensor configured to measure a magnetic field value at a location of the mobile device, and a memory configured to store first magnetic field maps corresponding to a number N of respective heights. The mobile device includes a magnetic field map deriving unit configured to derive second magnetic field maps corresponding to a number M of respective heights based on the first magnetic field maps, the number M being greater than the number N, and a location determining unit configured to determine the location of the mobile device based on the magnetic field value and the second magnetic field maps. | 06-12-2014 |
20140172356 | METHOD FOR ESTIMATING LOCATION OF USER TERMINAL USING DIFFERENCE BETWEEN TRUE NORTH AND MAGNETIC NORTH AND THE USER TERMINAL THEREOF - A method of estimating a location of a user terminal is provided. It is based on a difference between a true north and a magnetic north that may estimate a location of a user terminal on a magnetic field map based on a difference between a true north and a magnetic north corresponding to each location of the magnetic field map, and the user terminal thereof. | 06-19-2014 |
20140254713 | COMMUNICATION SYSTEM AND METHOD USING SPACE DIVISION MULTI-USER MULTIPLE INPUT MULTIPLE OUTPUT (SD-MIMO) COMMUNICATION METHOD - Provided is a communication system using a space division multi-user multiple input multiple output (SD-MIMO) communication method. A transmission apparatus may transmit, to each of terminals included within a coverage, common control information commonly transmitted to the terminals and individual control information individually transmitted to each of the terminals. The transmission apparatus does not precode the common control information and transmits the non-precoded common control information. The transmission apparatus precodes the individual control information and transmits the precoded individual control information. | 09-11-2014 |
20140269569 | APPARATUSES AND METHODS FOR DATA TRANSMISSION AND RECEPTION - Provided is a data transmission system of providing preambles of different classes according to a characteristic of a terminal. A terminal having constraints on using a power with respect to a data reception may receive only a preamble of a particular class and thus decrease a power consumption. A general terminal may receive preambles of plural classes and quickly receive data. | 09-18-2014 |
20150085947 | COMMUNICATION SYSTEM AND METHOD USING SPACE DIVISION MULTI-USER MULTIPLE INPUT MULTIPLE OUTPUT (SD-MIMO) COMMUNICATION METHOD - Provided is a communication system using a space division multi-user multiple input multiple output (SD-MIMO) communication method. A transmission apparatus may transmit, to each of terminals included within a coverage, common control information commonly transmitted to the terminals and individual control information individually transmitted to each of the terminals. The transmission apparatus does not precode the common control information and transmits the non-precoded common control information. The transmission apparatus precodes the individual control information and transmits the precoded individual control information. | 03-26-2015 |