Patent application number | Description | Published |
20090154529 | METHOD AND APPARATUS FOR ACQUIRING OFDM SYNCHRONIZATION - Provided is a method and apparatus for acquiring OFDM synchronization even when it fails to detect a plurality of symbols at an initial stage. In the method, a frequency is adjusted to a first frequency band and a cross correlation value between a received preamble symbol and a preset preamble symbol is calculated. When the calculated cross correlation value is larger than a predetermined reference value and is first detected, frequency hopping is performed to receive subsequent symbols and cross correlation values to the subsequent symbols are reexamined. When the reexamined cross correlation value larger than the predetermined reference value is detected, timing synchronization, frequency offset estimation, and frame detection are performed. | 06-18-2009 |
20100094920 | DEVICE AND METHOD FOR EXECUTING FOURIER TRANSFORM - A Fourier transform device generates a first sequence according to an input sequence based on a stored lookup table, and generates an output sequence by performing a butterfly operation on the first sequence a plurality of times. Therefore, hardware capacity and power consumption of the Fourier transform device can be reduced | 04-15-2010 |
20100142596 | SYNCHRONIZATION ERROR TRACKING DEVICE AND METHOD THEREOF - Provided is a synchronization error tracking device and method. The method and system estimates and corrects the synchronization error generated by time and frequency offsets during the data transmission interval and uses a module designed for initial synchronization or channel estimation without adding a new correlation operator. Further, a combining mark value and a synchronization position value acquired during the synchronization process are used. | 06-10-2010 |
20110130161 | TERMINAL AND BASE STATION, AND FREQUENCY SENSING METHOD THEREOF - Provided are a terminal and a base station, and a frequency sensing method thereof. The terminal or the base station may filter a frequency band needing frequency sensing in the entire frequency band where the terminal or the base station may receive an input signal. It is possible to enhance a detection performance and rate of signals by applying frequency sensing to the filtered frequency band. | 06-02-2011 |
20110151812 | APPARATUS AND METHOD FOR DETECTING SIGNAL IN COMMON FREQUENCY BAND - An apparatus for detecting a signal in a common frequency band includes: a signal processor configured to extract a selected band signal from received wireless signals by filtering the received wireless signal based on a frequency selection control signal, convert the extracted signal to a baseband signal, and detect a predetermined signal; a sensing signal determiner configured to determine existence of the signal, output a determination result, and outputs a frequency selection generating signal when the predetermined signal is absent; and a frequency selection controller configured to output the frequency selection control signal by selecting a target band among a plurality of previously decided bands. | 06-23-2011 |
20130165136 | SYSTEM AND METHOD FOR MANAGING RESOURCES IN A COMMUNICATION SYSTEM - The present invention relates to a system and method for managing resources, which involve managing a plurality of frequency resources in a communication system including a plurality of systems not having rights to use a first frequency band. The system and method of the present invention involve: defining, upon the detection of a frequency band available to the plurality of systems from the first frequency band, an interface between objects in the available frequency band so as to enable coexistence and frequency-sharing among the plurality of systems in the available frequency band; defining a primitive of a service access point (SAP) which supports the transceiving of information belonging to the plurality of systems between the objects through the interface; enabling the objects to transceive information belonging to the plurality of systems through the interface using the primitive of the service access point; and enabling the plurality of systems to coexist and share a frequency in the available frequency band to use the available frequency band by transceiving the information belonging to the plurality of systems. | 06-27-2013 |
20130184025 | WHITE SPACE USE SYSTEM WITH CONNECTING COGNITIVE SIGNAL - Provided is a white space use system using a connection recognition signal, which is associated with technology that enables white space devices to search for and to use an available frequency band in a digital broadcasting system. In particular, provided is a white space use system using a connection recognition signal that enables even devices incapable of autonomously searching for an available channel to safely use a white space in interaction with white space devices. | 07-18-2013 |
20130223575 | METHOD AND DEVICE FOR SENSING FREQUENCY FOR OFDM SYSTEMS - Provided is a frequency sensing method and apparatus in an orthogonal frequency division multiplexing (OFDM) system. Provided is a method of sensing a frequency of a received signal that is received from an outside in order to perform one of a plurality of radio communications. An OFDM apparatus may need to inspect a required frequency band before or after performing one of the plurality of radio communications, and to determine whether the frequency band is being used by another radio communication. | 08-29-2013 |
20140171072 | APPARATUS AND METHOD OF CALCULATING AVAILABLE CHANNELS CONSIDERING PRIORITY IN TVWS - Disclosed are an apparatus and a method of calculating available channels considering a priority in a TVWS. An apparatus for calculating available channels considering a priority in a TVWS according to the present invention includes: a communication module configured to receive a request for information on usable available channels from a TV Band Device (TVBD); an available channel calculation unit configured to calculate one or more available channels usable by the TVBD based on one or more predetermined reference parameters according to the request; a priority assignment unit configured to assign a priority to each of the calculated available channels, generate an available channel list including the available channels to which the priorities are assigned, and provide the TVBD with the generated available channel list; and a database configured to store the available channels, to which the priorities are assigned, calculated for each TVBD. | 06-19-2014 |
20140179247 | APPARATUS AND METHOD FOR CONTROLLING TRANSMITTING POWER OF WIRELESS DEVICE - Provided is an apparatus and method for controlling a transmission output of a radio device using a television (TV) band based on a frequency band, the apparatus including a frequency band selecting unit to select frequency bands to be compared, a radio wave attenuation calculation unit to calculate a radio wave attenuation for each of the selected frequency bands, and a transmission output control unit to automatically control the transmission output of the radio device using a TV band based on a difference value among the calculated attenuation values. According to an example embodiment, it is possible to extend a service area while sufficiently protecting a service being provided in the TV band, thereby realizing an efficient use of frequency resources. | 06-26-2014 |
20150208422 | METHOD OF ALLOCATING RADIO RESOURCES AND APPARATUS OF ALLOCATING RADIO RESOURCES IN COGNITIVE RADIO SMALL-CELL NETWORKS - Disclosed is a method of allocating radio resources, including: acquiring available channel information of a cognitive radio small cell; analyzing a channel characteristic based on the available channel information and dividing a required transmission rate of the cognitive radio small cell into required transmission rates for each available channel; and performing a power control for each available channel based on the divided required transmission rates for each available channel. The method of allocating radio resources may be performed under an interference environment in which a plurality of cognitive radio small cells is present and the plurality of cognitive radio small cells shares an available channel. | 07-23-2015 |
20150245170 | APPARATUS AND METHOD FOR SECURING AVAILABLE FREQUENCY - Disclosed are an apparatus and a method for securing an available frequency that secure a frequency in a communication area set so as not to overlap with a service protection area of a primary user as an available frequency to prevent interference with the primary user even in the case of communicating with a frequency sharing wireless apparatus without a positioning function. | 08-27-2015 |
20150257017 | METHOD FOR CALCULATING RADIO COVERAGE IN WIRELESS DEVICE - Disclosed is a method for calculating a radio coverage in a wireless device for calculating a protective distance so as not to allow a secondary user sharing a frequency with a primary user to have an effect of radio interference on the primary user, the method including: calculating a transmission power of a wireless signal transmitted through the frequency by the secondary user; determining a region affected by the wireless signal based on the transmission power of the secondary user; calculating an average ground clearance of the determined region; calculating a height of an installation place of an antenna of the secondary user from the average ground clearance; and calculating the height of the antenna from the average ground clearance by adding a length of the antenna of the secondary user to the calculated height and calculating the radio coverage based on the height from the average ground clearance. | 09-10-2015 |
20150312770 | AVAILABLE CHANNEL INFORMATION SHARING SYSTEM AND AVAILABLE CHANNEL INFORMATION SHARING METHOD - Disclosed are an available channel information sharing system and an available channel information sharing method, and an available channel information sharing system and an available channel information sharing method based on positional information and area information. | 10-29-2015 |
Patent application number | Description | Published |
20130320379 | EPOXY RESIN COMPOSITION AND LIGHT EMITTING APPARATUS - Disclosed are an epoxy resin composition and a light emitting apparatus. The epoxy resin composition includes a triazine derivative epoxy resin and an alicyclic epoxy resin. | 12-05-2013 |
20130320393 | EPOXY RESIN COMPOSITION AND LIGHT EMITTING APPARATUS - Disclosed are an epoxy resin composition and a light emitting apparatus. The epoxy resin composition includes a triazine derivative epoxy resin and a silicon-containing alicyclic epoxy resin | 12-05-2013 |
20150181691 | PRINTED CIRCUIT BOARD AND LIGHT EMITTING DEVICE - A printed circuit board according to an embodiment of the present invention includes a substrate including a first metal layer, a second metal layer formed on one surface of the first metal layer, and a third metal layer formed on the other surface of the first metal layer, an insulating layer formed on the second metal layer, and a circuit pattern formed on the insulating layer. A cavity configured to accommodate a light emitting element package is formed in the insulating layer. A thermal conductivity of the first metal layer is greater than thermal conductivities of the second metal layer and the third metal layer. | 06-25-2015 |
20160005937 | Epoxy Resin Composition and Light-Emitting Apparatus Using the Same - An epoxy resin composition provided according to one embodiment of the present invention includes: a triazine derivative epoxy compound; a siloxane compound including a cycloaliphatic epoxy group and a siloxane group; and a curing agent, where the epoxy resin composition includes 10 to 70 parts by weight of the siloxane group with respect to 100 parts by weight of the siloxane compound, thereby providing a composition excellent in heat resistance, light resistance, and excess moisture tolerance, with good shear adhesion to silicone, and capable of semi-solidification. | 01-07-2016 |
Patent application number | Description | Published |
20130065129 | POSITIVE ELECTRODE FOR RECHARGEABLE LITHIUM BATTERY, METHOD OF PREPARING THE SAME, AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE SAME - Provided is a positive electrode for a rechargeable lithium battery including a positive active material including a lithium phosphate compound particle and fiber-type carbon attached inside the lithium phosphate compound particle, a method of preparing the same, and a rechargeable lithium battery including the same. | 03-14-2013 |
20130164622 | POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, METHOD OF PREPARING THE SAME, AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE SAME - A positive active material for a rechargeable lithium battery including a compound represented by the following Chemical Formula 1: | 06-27-2013 |
20130316240 | POSITIVE ACTIVE MATERIAL AND RECHARGEABLE LITHIUM BATTERY INCLUDING SAME - The present invention provides a positive active material including a lithium-containing compound represented by the following Chemical Formula 1 and a rechargeable lithium battery including the positive active material. | 11-28-2013 |
20150064556 | ELECTRODE FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE SAME - An electrode for a rechargeable battery and a rechargeable battery, the electrode including a current collector; an electrode active material layer; and an electrolyte solution impregnation layer, wherein the electrolyte solution impregnation layer includes a metal oxide and a conductive material. | 03-05-2015 |
20150243970 | POSITIVE ACTIVE MATERIAL, POSITIVE ELECTRODE, AND LITHIUM BATTERY INCLUDING THE SAME AND METHOD OF MANUFACTURE THEREOF - A positive active material, a method of preparing the positive active material, a positive electrode including the positive active material, and a lithium battery including the positive active material are disclosed. The positive active material includes a core and a coating layer on the core. The coating layer includes a sulfur component. When a binding energy peak of the sulfur is measured by X-ray photoelectron spectroscopy (XPS), the binding energy peak is observed at about 165 eV to about 168 eV, and the stability of the positive active material may be improved due to the coating layer. Accordingly, the lifespan properties of a lithium battery including the positive active material may be improved. | 08-27-2015 |
20150243971 | POSITIVE ACTIVE MATERIAL, PREPARING METHOD THEREOF, POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY INCLUDING THE SAME, AND LITHIUM SECONDARY BATTERY EMPLOYING THE SAME - Provided are a positive active material that has a decreased amount of Li-containing impurities that remain on a lithium transition metal composite oxide surface to decrease an amount of gas generation and has improved lifespan properties, a method of preparing the same, a positive electrode for a lithium secondary battery including the positive active material, and a lithium secondary battery including the same. | 08-27-2015 |
20150380721 | RECHARGEABLE LITHIUM BATTERY - A rechargeable lithium battery includes a separator between a positive electrode and a negative electrode. The positive electrode has a positive electrode coating region and a positive electrode uncoated region. A positive active material is coated to a positive electrode current collector in the positive electrode coating region, and the positive active material is not coated in the positive electrode uncoated region. The negative electrode includes a negative electrode coating region and a negative uncoated region. A negative active material is coated to a negative electrode current collector in the negative electrode coating region, and the negative active material is not coated and a lithium source is in the negative uncoated region. The negative electrode coating region includes an active region corresponding to the positive electrode coating region. The lithium source is at the negative electrode and separated from an end of the active region by a predetermined interval. | 12-31-2015 |