Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: Provided are an apparatus and method for estimating a location of the terminal using multiple location estimating schemes. The apparatus and method may estimate the location of the terminal more accurately by controlling initial conditions for a plurality of location estimating units, for example, a start time for estimating locations, initial parameters for location estimating schemes, and the like.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A method and apparatus for controlling power in a decode-and-forward (DF) relay system is provided. The method of controlling power in a DF relay system includes: acquiring first channel information of a first link between a source node and a destination node, second channel information of a second link between the source node and a relay node, and third channel information of a third link between the relay node and the destination node, by using a pilot signal; determining a power level of the source node from the acquired first through third channel information; and feeding back the determined power level to the source node and the relay node.

Abstract: Provided is a constellation rotation relay system and constellation rotation relay method which can acquire full diversity gain by performing constellation rotation for a channel matrix in a relay network when configuring a virtual MIMO channel. The constellation rotation system includes a matrix creator for creating a symbol matrix by configuring a symbol transmitted in parallel from a source of a relay network; and a constellation rotation unit constellation rotating the symbol in the symbol matrix by adding a constellation rotation matrix to the created symbol matrix.

Abstract: Provided is a constellation rotation relay system and constellation rotation relay method which can acquire full diversity gain by performing constellation rotation for a channel matrix in a relay network when configuring a virtual MIMO channel. The constellation rotation system includes a matrix creator for creating a symbol matrix by configuring a symbol transmitted in parallel from a source of a relay network; and a constellation rotation unit constellation rotating the symbol in the symbol matrix by adding a constellation rotation matrix to the created symbol matrix.

Abstract: A data transmission method in a wireless relay system, and a method of selecting an optimal transmission mode based on a channel capacity of an individual link that is measured by a mobile station. The data transmission method includes: transmitting a first ratio of first partial data of the data from a base station to a mobile station; transmitting a second ratio of second partial data of the data from the base station to a first relay station; and forwarding the second partial data from the first relay station to the mobile station, wherein the first ratio or the second ratio is determined based on any one of a channel capacity of a first link between the base station and the mobile station, and a channel capacity of a second link between the first relay station and the mobile station.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A spatial modulation method and transmitting and receiving apparatuses using the spatial modulation method in a MIMO system are provided. The spatial modulation method uses an index of an activated antenna and a signal modulation constellation as an information source. The spatial modulation method is applied to the transmitting apparatus. The receiving apparatus uses a spatial modulation detection method in which a channel path gain is repeatedly multiplied to detect the spatially modulated signal efficiently.

Abstract: 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.

Abstract: 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.

Abstract: An image recording/reproducing apparatus and a control method thereof to provide the functions of recording image files in a recording medium and reproducing and editing the image files recorded in the recording medium. The apparatus and method enables a user to easily select and manipulate functions of the apparatus using a menu display, and can record, reproduce and edit the image files according to the function selected by the user. The apparatus and method, therefore allows the user to easily select and manipulate the functions using a displayed menu, and more efficiently manage and easily search for the recorded image files.