摘要:
Disclosed are an apparatus and a method for reducing the coding complexity in an LDPC code used in a digital communication system. In the method, parameters required for coding are determined according to a coding rate and a code length, a seed matrix is generated according to values of the parameters, a plurality of cell matrices are generated according to the values of the parameters, a parity check matrix is generated using the seed matrix and the cell matrix, and information bits are coded from the parity check matrix. The method can be realized by a small memory and a simple shift register and can perform coding even without obtaining a generation matrix, thereby remarkably reducing the complexity of a system.
摘要:
The present invention relates to a fungicidal composition which comprises N-(&agr;-cycno-2-thenyl)-4-ethyl-2-(ethylamino)-5-thiazolecarboxamide (ethaboxam) and as an adjuvant polyoxyalkylene alkyl ether.
摘要:
A method and apparatus for identifying a neighboring device are provided. The method of identifying a neighboring device, which is performed in a user terminal, includes: obtaining identification information and location information of a plurality of neighboring devices that can wirelessly communicate with the user terminal; extracting the identification information of one of the neighboring devices, the neighboring device being in the actual location range within the field of vision of the user terminal; and using the extracted identification information to request that the neighboring device perform wireless communication with the user terminal. According to the method and apparatus, identification information of a neighboring device with which a user terminal desires to perform wireless communication can be obtained using a viewfinder or liquid crystal display of the user terminal.
摘要:
Provided are a method and an apparatus for generating an image file having information about an object. The method of generating the image file having the object information includes the operations of generating image data by taking a picture of the object; receiving the object information from the object through a network; and storing the object information in an image file together with the image data. Accordingly, when a photographing apparatus capable of perform wireless communications generates image data by taking a picture of an object having a wireless communication module, object information is received from the object through wireless communications and is stored together with image data.
摘要:
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.
摘要:
A mobile terminal apparatus and method for sharing contents are provided. The mobile terminal apparatus includes a storage unit storing location information on an area; a location determination unit for determining a location of the mobile terminal apparatus; a network unit forming a network with one or more other mobile terminal apparatuses in the area; a control unit checking whether the mobile terminal apparatus has entered the area, based on the location information on the area and the determined location; and a screen configuration unit configuring a screen for providing information indicating locations of the one or more other mobile terminal apparatuses; wherein the control unit controls the network unit whereby the network unit obtains contents contained in one of the one or more other mobile terminal apparatuses, wherein the one mobile terminal apparatus is selected based on the information displayed on the screen and indicating the locations of the one or more other mobile terminal apparatuses. According to the apparatus and method, it is possible for users to share and watch user-created private media in real-time using bidirectional networking. Therefore, efficiency of media usage is increased.
摘要:
Provided is a fine frequency synchronization method of a WiBro system, and particularly, a fine frequency synchronization method which measures a spread degree of a received signal of an adjacent subcarrier using orthogonality of PN sequences and thereby estimates a frequency offset, in a base station or a wireless repeater without using a GPS receiver. The fine frequency synchronization method includes: (a) performing despreading on received adjacent subcarrier sequences, using a PN sequence transmitted from a transmitting party; (b) obtaining ratios of correlative values obtained by the despreading; and (c) estimating a frequency offset on the basis of the ratio of correlative values. Accordingly, fine frequency offset estimation with relatively low complexity is possible without using a GPS receiver in a WiBro environment where interference signals of other base stations or repeaters exist.
摘要:
An apparatus and method for detecting a signal in a receiver by maximum likelihood (ML) are provided, in which symbols are detected according to the number of transmit antennas of a transmitter and a modulation scheme, channels are estimated, an equivalent channel matrix corresponding to the estimated channels is determined, a permuted equivalent channel matrix is determined by multiplying the equivalent channel matrix by a predetermined permutation matrix, the permuted equivalent channel matrix is QR decomposed, a hard decision is performed on predetermined symbols among the detected symbols using a received signal resulting from the QR decomposition, and the log likelihood ratios (LLRs) of the hard-decided symbols are determined.
摘要:
A method for displaying widget windows is provided, including generating a widget display screen including at least one widget window, determining if a display area of the at least one widget window satisfies a preset threshold condition, and adding a new widget display screen including a new widget window if the threshold condition is satisfied. Accordingly, services can be provided through widget windows without preventing the viewer from viewing the TV, thereby enhancing user convenience.