Patent application number | Description | Published |
20090052593 | LOG LIKELIHOOD RATIO CALCULATION METHOD, TRANSMIT SIGNAL DETECTION METHOD, AND RECEIVER - The present invention relates to a log-likelihood ratio calculation method, a transmitting signal detection method, and a receiver. The present invention estimates a channel on the basis of the received signal and rearranges a plurality of layers. Further, at the time of rearrangement of the layers, a symbol of a layer having the lowest reliability is considered for every constellation dot, and the successive interference for the remaining layers is removed corresponding to the constellation dots of the layer having the lowest reliability to set the transmitting symbol candidate vector. Furthermore, a log-likelihood ratio for every bit of the plurality of layers is calculated using the transmitting symbol candidate vector to decode the channel. | 02-26-2009 |
20090060069 | SIGNAL TRANSMITTING APPARATUS, METHOD THEREOF, AND INVERSE FAST FOURIER TRANSFORM APPARATUS FOR SIGNAL TRANSMITTING APPARATUS - The present invention relates to a signal transmitting apparatus, a method thereof, and an inverse fast Fourier transform (IFFT) apparatus for a signal transmitting apparatus. A signal transmitting apparatus according to an embodiment of the present invention receives data, and performs inverse fast Fourier transform (IFFT) on the data on the basis of a twiddle factor for shifting output data by the size of a cyclic prefix. In addition, the signal transmitting apparatus sequentially stores data corresponding to the size of the cyclic prefix starting with initial data among the transformed data, and generates an OFDM symbol on the basis of the stored data and the transformed data. According to the embodiment of the present invention, it is possible to efficiently reduce a time delay and a memory use amount when a cyclic prefix is added at a transmitting end, without changing the size of hardware and power consumption. | 03-05-2009 |
20090135964 | METHOD OF CALCULATING LOG-LIKELIHOOD RATIO AND METHOD OF DETECTING TRANSMISSION SIGNAL - The present invention relates to a method of calculating a log-likelihood ratio and a method of detecting a transmission signal. According to the present invention, when a transmission symbol candidate vector is detected on the basis of a received signal, a threshold value and an ML metric of each transmission symbol candidate vector are calculated and the ML metric that is larger than the threshold value is updated by the threshold value. Further, a log-likelihood ratio of the transmission signal bit is calculated using the updated ML metric and the threshold value, and a transmission signal is detected using the log-likelihood ratio. | 05-28-2009 |
20090147894 | METHOD FOR DETECTING TRANSMISSION SYMBOLS IN MULTIPLE ANTENNA SYSTEM - The present invention relates to a transmission symbol detection method in a multiple antenna system. In the present invention, when a channel matrix is estimated through channel estimation, a receiving side calculates a Q matrix and an R matrix through QR decomposition that is more simplified than a typical QR decomposition from an augmented channel matrix that includes the estimated channel matrix. In addition, the receiving side detects symbols having the minimum Euclidean metric by using the two matrixes, as transmission symbols. | 06-11-2009 |
20100130187 | BASE-STATION CONFIGURATION CONTROL SYSTEM AND METHOD - Provided are a base-station configuration control apparatus, system and method. The base-station configuration control apparatus includes a user interface and a CPU. The user interface receives a user's request to selection of a standard protocol. The CPU receives one or more programs based on a selected standard protocol from a storage, which is connected to an external bus, to download the received programs to a function block through a host interface, based on a SDR technology. | 05-27-2010 |
20100131628 | MOBILE BASE STATION AND HARDWARE PLATFORM RECONFIGURING METHOD FOR THE SAME - Provided is a hardware platform reconfiguring method for a mobile base station. A control signal for controlling the download of a program is generated based on an SDR technique. A program is received from an external device. The program from the external device is downloaded to a hardware module of the mobile base station based on the SDR technique according to the control signal. | 05-27-2010 |
20100149963 | APPARATUS AND METHOD FOR FAST FOURIER TRANSFORM/INVERSE FAST FOURIER TRANSFORM - An FFT/IFFT apparatus and method are provided. The FFT/IFFT apparatus includes a storage unit, a first FFT/IFFT unit, a second FFT/IFFT unit, and a third FFT/IFFT unit. The storage unit has as many addresses as the number of bits of input data. The first FFT/IFFT unit sequentially stores half of the input data in the storage unit, performs a first-point FFT/IFFT operation while sequentially receiving the other half of the input data, and stores the first-point FFT/IFFT operation result in the storage unit. The second FFT/IFFT unit performs a second-point FFT/IFFT operation on the first-point FFT/IFFTed data, and stores the second-point FFT/IFFT operation result in the storage unit. The third FFT/IFFT unit performs a third-point FFT/IFFT operation on the second-point FFT/IFFTed data, and stores the third-point FFT/IFFT operation result in the storage unit. | 06-17-2010 |
20100150277 | METHOD FOR DETECTING RANDOM ACCESS SIGNAL - Provided is a method for detecting random access signal, and the method includes detecting a peak position of a random access signal in a first preamble section and ignoring the random access signal apart from the peak position for less than a certain distance in a second preamble section adjacent to the first preamble section. | 06-17-2010 |
20100153826 | APPARATUS AND METHOD FOR TAIL BITING CONVOLUTIONAL ENCODING - Provided are an apparatus and a method for tail biting convolutional encoding. The apparatus includes a plurality of shift registers and at least one operator. The plurality of shift registers sequentially performs a shift operation on input bit-stream. The operator outputs an encoded bit-stream by performing convolutional encoding on an output of the shift register using a generator polynomial corresponding to a predetermined code rate. A transmission encoded bit-stream is created by replacing encoded data for a certain initial bit-stream of the encoded bit-stream with a bit-stream obtained by subsequently performing convolutional encoding on the initial bit-stream. | 06-17-2010 |
20100157917 | RESOURCE ALLOCATION MAPPING APPARATUS AND METHOD FOR TRANSMITTING CSRS, AND CSRS TRANSMITTING APPARATUS AND METHOD - Provided are a resource allocation mapping apparatus and method for transmitting CSRS, the resource allocation mapping method includes calculating subcarrier indexes to allocate same subcarrier index to base stations that have same remainder when a base-station index, which classifies the base stations, is divided by a constant; and mapping a resource allocation of the CSRS for the each base station using the calculated subcarrier indexes. | 06-24-2010 |
20100157918 | METHOD AND APPARATUS FOR ALLOCATING DEMODULATION REFERENCE SIGNALS - Provided are a method and apparatus for allocating DeModulation Reference Signals (DMRSs). The method includes generating DMRSs, and allocating the DMRSs at consecutive subcarrier positions with respect to all the transmit (TX) antennas of each User Equipment (UE) and allocating the DMRSs at different subcarrier positions with respect to each TX antenna of the UE. | 06-24-2010 |
20100158145 | MULTIPLE INPUT MULTIPLE OUTPUT RADIO COMMUNICATION SYSTEM WITH PRE-EQUALIZER AND COMMUNICATION METHOD THEREOF - Multiple Input Multiple Output (MIMO) radio communication system and method are provided. A transmitter of the MIMO radio communication system includes an STBC encoding unit, a pre-equalization unit, and a transmit antenna unit. The STBC encoding unit receives a transmit data and performs an STBC encoding to output a plurality of encoded signals. The pre-equalization unit performs a pre-equalization process on the plurality of encoded signals to output a plurality of transmit signals. The transmit antenna unit transmits the plurality of transmit signals at different time. Also, a receiver of the MIMO radio communication system which includes a receive antenna unit, an STBC decoding unit, and a data output unit is provided. | 06-24-2010 |
20100159939 | BIT CALCULATION METHOD AND APPARATUS FOR PDSCH TRANSMISSION - Provided is a bit calculation method, which accurately and easily calculates how many bits are transmitted by codeword per PDSCH in advance before a modulator performs modulation by TTI unit on a PCH or a DL-SCH transferred by a TrCH encoder, in a base-station modulator applied to an LTE-advanced system. Accordingly, the bit calculation method enables smooth data transmission, and easily checks data transmission error. | 06-24-2010 |
20100161699 | HIGH-SPEED DISCRETE FOURIER TRANSFORM APPARATUS AND METHOD THEREOF - Provided are a high-speed Discrete Fourier Transform (DFT) apparatus and a method thereof. The high-speed DFT apparatus includes a zero padding unit, a Fast Fourier Transform (FFT) unit, and a preamble index decision unit. The zero padding unit receives a first input signal having a length of a prime number and changes the first input signal into a second input signal having a length of an exponentiation of 2. The FFT unit performs a FFT on the second input signal outputted from the zero padding unit. The preamble index decision unit detects a preamble index from an output signal from the FFT unit. | 06-24-2010 |
20100162077 | METHOD AND APPARATUS FOR MAP DECODING AND TURBO DECODER USING THE SAME - A Maximum A Posteriori (MAP) decoder and a MAP decoding method are provided. The MAP decoder includes a first metric operation unit, a first bit-width control unit, a second metric operation unit, a Log Likelihood Ratio (LLR) operation unit, and a second bit-width control unit. The first metric operation unit outputs a first metric data using an input data. The first bit-width control unit controls a bit-width of the first metric data according to a modulation scheme of the input data. The second metric operation unit outputs a second metric data using the first metric data having the controlled bit-width. The LLR operation unit outputs LLR data using the second metric data. The second bit-width control unit outputs decoding data by re-controlling the bit-width of the LLR data. | 06-24-2010 |
20100266094 | DUAL-COOLED NUCLEAR FUEL ROD HAVING ANNULAR PLUGS AND METHOD OF MANUFACTURING THE SAME - A dual-cooled nuclear fuel rod and a method of manufacturing the same are provided. The nuclear fuel rod includes an outer cladding tube having a circular cross section, an inner cladding tube having an outer diameter smaller than an inner diameter of the outer cladding tube, and a length longer than the outer cladding tube, and located in parallel in the outer cladding tube, a pellet charged in a space between the outer and inner cladding tubes and generating energy by nuclear fission, and first and second end plugs coupling opposite ends of the outer cladding tube to stepped outer joints formed on outer circumferences of first ends thereof and coupling opposite ends of the inner cladding tube to stepped inner joints formed on inner circumferences of the first ends thereof. | 10-21-2010 |
20110026918 | APPARATUS FOR VISIBLE LIGHT COMMUNICATION INDICATING COMMUNICATION QUALITY USING RGB COLOR MIXING AND METHOD THEREOF - A visible light communication apparatus of the present invention includes: a target signal receiver filtering only a signal having a target wavelength from a visible light received signal received from a transmitting terminal; a signal generator judging a reception quality of the visible light received signal by using characteristics of the signal having the target wavelength and generating a visible signal by using at least one light source having a wavelength different from the target wavelength in accordance with the reception quality; and an optical signal transmitter transmitting the signal having the target wavelength for transmitting data together with the visible signal and changing a light emitting color of a visible light transmitted signal. | 02-03-2011 |
20110033181 | APPARATUS FOR VISIBLE LIGHT COMMUNICATION PROVIDING INTUITIVE INFORMATION AND METHOD USING THE SAME - There is disclosed a visible light communication technology capable of intuitively recognizing a transmission speed, an alignment state, a communication state, or a transmission rate. A visible light communication apparatus according to an embodiment of the present invention includes: a light source selecting unit selecting at least one light source from among a plurality of light sources generating lights having different wavelengths by considering intuitive information distinguished depending on a wavelength in a visible light band; and a visible light communication unit performing visible light communication by at least one selected light source to allow the intuitive information to be recognized by a color corresponding to at least one selected light source. Accordingly, a user using the visible light communication can intuitively know an optimal communication state or transmission speed. | 02-10-2011 |
20110069965 | TRANSMITTER, RECEIVER FOR VISIBLE LIGHT COMMUNICATION AND METHOD USING THE SAME - A visible light wireless communication receiver includes: a source code recognizing unit that receives a source bit stream and recognizes the source bit stream as source codes of a unit of a first number of bits; and a line coding unit that encodes each of the source codes into an encoding code of a unit of a second number of bits, the second number being larger than the first number. In particular, in the encoding code, the number of bits corresponding to 1 is the same as the number of bits corresponding to 0. Therefore, the change in brightness of lighting may be minimized in the visible light wireless communication. | 03-24-2011 |
20110103521 | METHOD AND APPARATUS FOR DECOMPOSING RECEIVED SYMBOL SIGNAL MODULATED WITH BIT REFLECTED GRAY CODE IN BIT INFORMATION - Disclosed is a method and apparatus for composing a received symbol signal modulated with a bit reflected Gray code into bit information. According to an embodiment of the present invention, a positive integer of the received symbol signal having bits is assigned according to the Gray mapping rule, and a sign is determined. A value that is indicative of an arrangement of the bits constituting the received symbol signal is calculated. A boundary value in at least one bit group consisting of the bits constituting the received symbol signal is acquired, and a difference from an absolute value of the received symbol signal is calculated. The received symbol signal is converted into information per bit using a value of the received symbol signal based on the positive integer and the determined sign, the value that is indicative of the bit arrangement, and the difference from the absolute value. Therefore, it is possible to reduce complexity in bitwise decomposition for an iterative decoder inevitably used in a receiver. | 05-05-2011 |
20110145905 | APPARATUS AND METHOD FOR MANAGING WEB BASED SERVICE ACCOUNT - Provided is a method and apparatus for managing a web based service account. The web based service account management apparatus may select, from among web based service accounts, an account undesired to be exposed to others, and may display an account set with a hiding indication only when a user authenticated through a user authentication process desires to read the account. | 06-16-2011 |
20110299645 | Breeding Nuclear Fuel Mixture Using Metallic Thorium - Disclosed is a breeding nuclear fuel mixture including metallic thorium useable in a nuclear power plant, prepared by mixing uranium dioxide (UO | 12-08-2011 |
20120087676 | DATA TRANSMITTING AND RECEIVING APPARATUS AND METHOD FOR VISIBLE LIGHT COMMUNICATION - An apparatus for transmitting data for visible light communication sets up the pulse width control step of pulse width modulation (PWM) in a unit time interval, modulates each symbol of VLC source data input into a PWM signal in accordance with the pulse width control step, generates a visible light modulation signal by controlling the turn-on time or turn-off time of a plurality of light emitting diodes (LEDs) in response to the PWM signal, and transmits the visible light modulation signal. | 04-12-2012 |
20120087677 | METHOD AND APPARATUS FOR TRANSMITTING DATA USING VISIBLE LIGHT COMMUNICATION - A transmitting apparatus using visible light communication generates a light source control signal from color information representing additional information and transmits additional information with a color of light that is emitted by a light source by controlling an on/off time of a plurality of LEDs according to the light source control signal. Therefore, a user can intuitively know additional information from a color of light that is emitted by the light source. | 04-12-2012 |
20120154824 | POSITION MEASURING APPARATUS AND METHOD - A position measuring apparatus receives at least one precise position information set from at least one visible-light wireless communication device including a transmission light source, and upon receipt of the at least one precise position information ser, acquires a virtual distance based on the positions of transmission light sources imaged on an image sensor. Next, the position is measured according to the precise position information and the actual distance, virtual distance, and image sensor inclination based on this information. | 06-21-2012 |
20120155889 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA USING VISIBLE LIGHT COMMUNICATION - A transmitting apparatus using visible light communication generates transmission data into a two-dimensional data code according to a predetermined code method between the transmitting apparatus and a receiving apparatus and transmits the two-dimensional data code through a plurality of light emitting diodes (LED) that are arranged in a two-dimensional form. Therefore, the receiving apparatus senses light from a plurality of LEDs as an image using an image sensor, demodulates the image into a two-dimensional data code, decodes the two-dimensional data code using a code book, and restores data. | 06-21-2012 |
20120157159 | COMMUNICATION APPARATUS USING IMAGE SENSOR AND ERROR CORRECTION METHOD - A communication apparatus using an image sensor captures an image including a light signal transmitted from a transmission apparatus that includes a transmission light source, and obtains data from the captured image. In a case that a reception error rate generated by the obtained data is changed, a cause of the change of the error rate is measured, and at least one of a zooming operation and a focusing operation is performed depending on the measured result, thereby correcting the error. | 06-21-2012 |
20120163211 | DATA RATE MATCHING METHOD AND APPARATUS FOR USE IN MOBILE COMMUNICATION SYSTEMS - Disclosed are a data rate matching method and apparatus for use in mobile communication systems that can perform parallel interleaving at a high speed without a collision between encoded data input in parallel. A set of first parameters (f | 06-28-2012 |
20130003979 | APPARATUS AND METHOD FOR GENERATING MULTIPLE OUTPUT SEQUENCE - Provided are an apparatus and method for generating a multiple output sequence. The apparatus includes an update unit configured to update a first shift register having k stages by inputting a value to the first shift register at every clock, a transfer unit configured to simultaneously transfer, at every clock, output values output from the first shift register to k stages of a second shift register respectively and output values output from k stages of the second shift register to k stages of a third shift register having the k stages respectively, and a multiple output generator configured to generate a multiple output sequence by outputting values of the k stages of the third shift register at every clock. | 01-03-2013 |
20130004182 | VISIBLE LIGHT COMMUNICATION APPARATUS CAPABLE OF MINUTE DIMMING CONTROL AND METHOD USING THE SAME - Disclosed herein are a visible light communication method and apparatus. The visible light communication method includes determining a dimming level variable to perform minute dimming control, selecting an upper dimming symbol and a lower dimming symbol, which belong to Variable Pulse Position Modulation (VPPM) symbols, based on the dimming level variable, determining at least one of the number of upper dimming symbols to be sent and the number of lower dimming symbols to be sent based on the dimming level variable, and generating a transmission sequence corresponding to the dimming level variable by combining the upper dimming symbols and the lower dimming symbols based on the number of symbols to be sent. | 01-03-2013 |
20130004183 | APPARATUS FOR VISIBLE LIGHT COMMUNICATION PROVIDING INTUITIVE INFORMATION AND METHOD USING THE SAME - There is disclosed a visible light communication technology capable of intuitively recognizing a transmission speed, an alignment status, a communication status, or a transmission rate. A visible light communication apparatus according to an embodiment of the present invention includes: a light source selecting unit selecting at least one light source of a plurality of light sources generating lights having different wavelengths by considering intuitive information distinguished depending on a wavelength in a visible light band; and a visible light communication unit performing visible light communication by at least one selected light source to allow the intuitive information to be recognized by a color corresponding to at least one selected light source. Accordingly, a user using the visible light communication can intuitively know an optimal communication status or transmission speed. | 01-03-2013 |
20130004184 | APPARATUS FOR VISIBLE LIGHT COMMUNICATION PROVIDING INTUITIVE INFORMATION AND METHOD USING THE SAME - There is disclosed a visible light communication technology capable of intuitively recognizing a transmission speed, an alignment status, a communication status, or a transmission rate. A visible light communication apparatus according to an embodiment of the present invention includes: a light source selecting unit selecting at least one light source of a plurality of light sources generating lights having different wavelengths by considering intuitive information distinguished depending on a wavelength in a visible light band; and a visible light communication unit performing visible light communication by at least one selected light source to allow the intuitive information to be recognized by a color corresponding to at least one selected light source. Accordingly, a user using the visible light communication can intuitively know an optimal communication status or transmission speed. | 01-03-2013 |
20130070811 | TRANSMISSION/RECEPTION APPARATUS AND METHOD FOR FILTERED MULTI-TONE SYSTEM - Disclosed are an apparatus for transmitting multi-carrier signals, including: a signal spreading unit configured to generate band-spread signals through band spreading of a plurality of symbol-mapped signals; and a modulation unit configured to generate a modulation signal by mixing the band-spread signals with a plurality of sub-carriers and adding up the mixed band-spread signals, and a method for transmitting multi-carrier signals. | 03-21-2013 |
20130148522 | DATA COMMUNICATION APPARATUS AND METHOD THEREOF, AND DATA COMMUNICATION SYSTEM WITH THE SAME APPARATUS AND METHOD THEREOF - A data communication apparatus according to the present invention includes a channel determination unit for determining frequency channels to be monitored on the basis of a current location of the ship station, a performance measurement unit for measuring channel performance for each of the determined frequency channels, a channel selection unit for selecting one frequency channel from among the determined frequency channels on the basis of the measured channel performance, and a data communication unit for performing data communication with the coast station using the selected frequency channel. | 06-13-2013 |
20130148645 | UPLINK SYNCHRONIZATION METHOD BETWEEN TERMINAL AND BASE STATION - Disclosed is an uplink synchronization method of a base station according to the present invention includes receiving an initial access signal from a terminal; obtaining an uplink synchronization using the received initial access signal; informing the terminal about obtainment of the uplink synchronization; and receiving a data signal from the terminal. According to the present invention, a marine wireless communication system may efficiently perform uplink synchronization between the base station and the terminal, and may efficiently operate wireless resources. | 06-13-2013 |
20130157676 | CONTROL METHOD FOR DEVICE-TO-DEVICE COMMUNICATION - Provided is a control method for device-to-device (D2D) communication. A base station measures a load of a cell, receives location information about each piece of user equipment (UE) from a plurality of pieces of UE, selects any one of an overlay-based resource allocation method and an underlay-based resource allocation method on the basis of the measured cell load and the location information about the respective pieces of UE, allocates resources for D2D communication on the basis of the selected resource allocation method, and controls power according to the locations of the pieces of UE and a density of pieces of cellular communication UE. Accordingly, it is possible to improve resource use efficiency and efficiently remove interference. | 06-20-2013 |
20130163516 | MARITIME COMMUNICATION SYSTEM AND METHOD - Provided is a maritime communication system and method. A ship station of the maritime communication system may receive, from a maritime broadcast base station, maritime configuration information that includes setting information of shore base stations and setting information of maritime ship stations, may establish a radio link when a radio link configurable shore base station is present, may set the radio link through a radio link configurable neighbor ship station when the radio link configurable shore base station is absent, and may establish the radio link with an internal maritime satellite (INMARSAT) or a maritime very small aperture terminal (MVSAT) when the radio link configurable shore base station is absent and when the radio link configurable neighbor ship station is absent. | 06-27-2013 |
20130188968 | VISIBLE LIGHT COMMUNICATION METHOD USING DMX-512 NETWORK AND APPARATUSES FOR THE SAME - Disclosed herein are a Visual Light Communication (VLC) method and apparatus using a DMX-512 network. The VLC apparatus includes a DMX signal generation unit and a DMX signal transmission unit. The DMX signal generation unit generates VLC data packets each including a DMX header, fragmentation information, and a data fragment. The DMX signal transmission unit transmits the VLC data packets to an LED lighting apparatus coupled over a DMX-512 network in order to perform VLC. | 07-25-2013 |
20130195468 | TRANSMITTER, RECEIVER FOR VISIBLE LIGHT COMMUNICATION AND METHOD USING THE SAME - A visible light wireless communication receiver includes: a source code recognizing unit that receives a source bit stream and recognizes the source bit stream as source codes of a unit of a first number of bits; and a line coding unit that encodes each of the source codes into an encoding code of a unit of a second number of bits, the second number being larger than the first number. In particular, in the encoding code, the number of bits corresponding to 1 is the same as the number of bits corresponding to 0. Therefore, the change in brightness of lighting may be minimized in the visible light wireless communication. | 08-01-2013 |
20130234607 | LED LIGHTING CONTROL APPARATUS AND METHOD BASED ON VISIBLE LIGHT COMMUNICATION - Disclosed herein is an LED lighting control apparatus and method based on visible light communication. The LED lighting control apparatus includes lighting information collection means for collecting status information about lighting means and environmental information about surroundings of the lighting means, and transmitting the collected information to lighting control means. The lighting information collection means includes a visible light reception processing unit for receiving the status information about the lighting means contained in a visible light signal emitted from the lighting means, a lighting information analysis unit including a plurality of environmental information sensors for detecting the environmental information about the surroundings of the lighting means, the lighting information analysis unit analyzing the environmental information detected by the environmental information sensors, and a lighting information control unit for collecting the status information and the analyzed environmental information and transmitting the collected information to the lighting control means. | 09-12-2013 |
20130243130 | RECEIVING APPARATUS IN OFDM SYSTEM AND RECEIVING METHOD - Disclosed are a receiving apparatus and a receiving method. More particularly, disclosed are a receiving apparatus and a receiving method in an OFDM system. The receiving apparatus in the OFDM system includes a receiver for receiving wireless signals transmitted through wireless channels, a transformer for transforming the wireless signals into signals of a frequency domain, an inverse transformer for inversely transforming reference signals into signals of a time domain based on a number of reference signals included in the signals of the frequency domain and an arrangement interval of the reference signals included in the signals of the frequency domain, and a determiner for determining a delay spread based on the inversely transformed signals of the time domain. | 09-19-2013 |
20130343768 | INTER-VEHICLE COMMUNICATION APPARATUS AND METHOD USING VISIBLE LIGHT COMMUNICATION - The present invention relates to an inter-vehicle communication apparatus and method using visible light communication. The inter-vehicle communication apparatus using visible light communication includes a spreading code application unit for applying a spreading code to transmission data desired to be transmitted, and a transmission unit for generating a transmission frame based on the transmission data to which the spreading code is applied, and transmitting the transmission frame via a lighting lamp of a vehicle. The transmission frame includes a preamble field required to synchronize the transmission frame, a data field required to transmit the transmission data, and a position field required to provide hopping information of the transmission data. | 12-26-2013 |
20140009083 | APPARATUS AND METHOD FOR CONTROLLING FAULT IN LIGHTING NETWORK - Disclosed herein is an apparatus and method for controlling a fault in a lighting network The apparatus includes power selection units respectively provided in a plurality of lighting units connected to one another over a network, each power selection unit being configured to compare a reference voltage with an output voltage sensed from power supply signals input from power supply units respectively provided in a lighting unit, located ahead of a faulty lighting unit, and the faulty lighting unit if a fault occurs in the lighting unit, and to select supply power to be supplied to the faulty lighting unit. Lighting control units control driving of the faulty lighting unit using the selected supply power. | 01-09-2014 |
20140010540 | VISIBLE LIGHT COMMUNICATION METHOD AND APPARATUS - Disclosed herein are a visible light communication method and apparatus. The visible light communication method includes determining whether a current location is the start of a symbol of a transmission signal, setting a sample index, a signal accumulated value for an accumulation region of a front half portion of the symbol, and a signal accumulated value for an accumulation region of a rear half portion of the symbol, determining whether the sample index belongs to an accumulation region of the front or rear half portion of the symbol, and accumulating samples of the transmission signal in accordance with the location to which the sample index belongs, determining whether a current location corresponds to the end of the symbol, and outputting a Variable Pulse Position Modulation (VPPM) communication signal corresponding to the transmission signal. | 01-09-2014 |
20140037028 | APPARATUS AND METHOD FOR DETECTING CODE - Disclosed is an apparatus and method for detecting a code. The code detecting apparatus may include a detector to detect symbol synchronous timing information associated with a PSS code from a first signal received during a predetermined first period, a compensator to extract and buffer the PSS code and the SSS code based on the symbol synchronous timing information detected from a second signal received during a predetermined second period, and compensate for a frequency offset with respect to the buffered PSS code, and a processor to re-detect the symbol synchronous timing information based on the PSS code in which the frequency offset is compensated for, and extract the buffered SSS code using the re-detected symbol synchronous timing information. | 02-06-2014 |
20140052390 | APPARATUS AND METHOD FOR DETECTING ERROR AND VARIATION IN LIGHT-EMITTING DIODE LIGHTTING - Disclosed herein are an apparatus and method for sensing an error and a variation in Light-Emitting Diode (LED) lighting. In the method, a PWM signal including required light emission information is generated. Tail data including operation information is generated. A CRC value based on the tail data is also generated. A tail-CRC signal is generated by combining the tail data with the CRC value. Finally, a PWM-tail signal is generated by combining the tail-CRC signal with the PWM signal. | 02-20-2014 |
20140110571 | MOTION SENSOR AND METHOD OF OPERATING THE SAME - The present invention relates to a motion sensor and method of operating the motion sensor, which can adjust the range of a detection area. For this, the motion sensor according to the present invention includes a detection unit for outputting a variation signal corresponding to motion. A threshold level setting unit variably sets at least one changeable threshold level. A comparison unit detects the motion by performing a comparison operation based on the changeable threshold level and the variation signal at threshold sensitivity corresponding to the changeable threshold level. | 04-24-2014 |
20140119307 | ACCESS METHOD BASED ON CARRIER SENSING IN COMMUNICATION SYSTEM - Provided is an access method using carrier sensing in a communication system. A random access method according to an embodiment of the present invention includes performing sensing with respect to a carrier in a first part of a radio slot, and transmitting preemptive occupation signals for the carrier through the carrier in a second part after the first part of the radio slot when the carrier is in a non-occupied state based on the sensing result in the first part. Accordingly, in the random access method according to the present invention, efficient random access may be made possible even when there are access requests from a large number of terminals in a narrow frequency band in a communication system. | 05-01-2014 |
20140139113 | LIGHTING NETWORK CONTROL APPARATUS AND METHOD - Disclosed herein are an apparatus and method for controlling a lighting network. The apparatus for controlling lighting network includes a control device and a plurality of control gears. The control device generates and transfers commands to control lighting. The plurality of control gears receives the commands from the control device and control lighting. The control device assigns a right to use a lighting network to the control gears, and the control gears send information about a change in a lighting state or error details to the control device using the right to use a lighting network. | 05-22-2014 |
20140160998 | SHIP STATION COMMUNICATION APPARATUS AND SHIP STATION COMMUNICATION METHOD - Disclosed are a ship station communication apparatus and a ship station communication method that enable direct communication between adjacent ships as well as two-way communication between a ship station and a coast station without increasing a size of a ship station or costs. A ship station communication apparatus for communication between a ship station and another ship station and communication between the ship station and a coast station according to an exemplary embodiment of the present invention may include a first switch configured to switch an operation between a transmission unit of the ship station and a reception unit of the ship station; and a second switch configured to switch a frequency of the reception unit. | 06-12-2014 |
20140169798 | HIGH SPEED DATA SERIAL CONNECTION INTERFACE APPARATUS, CPRI TRANSMITTING AND RECEIVING METHOD - A high speed data serial connection interface apparatus, CPRI transmitting and receiving methods thereof are disclosed. A high speed data serial connection interface apparatus according to the present invention includes: a data transmitter configured to count a continuous NCB of 0 or 1 in an input data block, select an LSI value, and perform up scaling on data in the block in accordance with the selected LSI value to transmit the data through an optical fiber in accordance with a CPRI (common public radio interface) protocol; and a data receiver configured to receive the data transmitted by the data transmitter, restore the LSI value from the received data, and perform down scaling on the received data in accordance with the restored LSI value to restore original data. | 06-19-2014 |
20140199071 | METHOD OF PROCESSING DMX-VLC ADDRESS USING DMX-512 NETWORK AND DEVICE USING THE SAME - The present invention relates to a method of processing a Digital Multiplex (DMX)-Visible Light Communication (VLC) address and a device using the method. In the method of processing a DMX-VLC address, a DMX-512 packet is received. It is determined whether the DMX-512 packet includes dimming data by using a start code of the DMX-512 packet. Lighting data is processed using an address recorded in a DMX-512 address field of a DMX-VLC address included in the DMX-512 packet if it is determined that the DMX-512 packet includes the dimming data. Non-lighting data is processed using an address recorded in a DMX-VLC extended address field of the DMX-VLC address if it is determined that the DMX-512 packet does not include dimming data. | 07-17-2014 |
20140199078 | VISIBLE LIGHT COMMUNICATION METHOD USING DMX-512 NETWORK AND DEVICE FOR THE SAME - Disclosed herein is a visible light communication method and device using a DMX-512 network. In the visible light communication method, dimming data packets are received. Visible Light Communication (VLC) data packets are generated. The dimming data packets and the VLC data packets are scheduled so that one or more of the VLC data packets are transmitted to Light Emitting Diode (LED) lighting devices connected over a Digital Multiplex (DMX)-512 network between transmission times of the dimming data packets. | 07-17-2014 |
20140236480 | REAL-TIME MOVEMENT PATH ESTIMATION APPARATUS AND METHOD USING VISIBLE LIGHT COMMUNICATION - The present invention relates to a real-time movement path estimation apparatus using visible light communication. A server for performing communication with an agent for tracking a location of a client which is a target to be tracked includes an agent management unit for setting the agent and the client. A server communication unit receives management information of the agent at intervals of a preset monitoring period. A path prediction unit derives a predicted path for a movement path of the client, based on the location information of the client included in the management information and tracked by a location determination device including a visible light communication device or an image capturing device in the agent. | 08-21-2014 |
20140292209 | INTELLIGENT LIGHTING CONTROL APPARATUS AND METHOD - The present invention relates to an intelligent lighting control apparatus and method, which control an intelligent lighting unit including multiple sensors depending on time, place, scene, environment, or the like, based on the results of sensing by the sensors. The intelligent lighting control apparatus includes a multi-sensor unit including multiple sensors, the multi-sensor unit sensing motion of a person or an object within a set sensing area using at least one of the multiple sensors. A lighting control unit controls an operation of a lighting unit based on frequency data corresponding to results of sensing by the multi-sensor unit and a class of lighting type corresponding to the frequency data. | 10-02-2014 |
20140306609 | LED LIGHTING CONTROL APPARATUS AND LED LIGHTING CONTROL SYSTEM USING THE SAME - Disclosed herein are an LED lighting control apparatus and an LED lighting control system using the apparatus. The proposed system includes a wired lighting unit connected to LED lighting in a wired manner and configured to perform lighting control on LED lighting. A wireless lighting unit performs lighting control on the LED lighting via wireless communication with a wireless terminal and operates in conjunction with the wired lighting unit. A location communication unit allocates individual IDs of LED lighting and performs transmission/reception of data to/from an external terminal. A multi-sensor unit supports multiple sensors and analyzes sensor data collected from the multiple sensors. An active heat dissipation unit dissipates heat from the LED lighting based on analyzed sensor data. A processor control unit controls operations of the wired lighting unit, the wireless lighting unit, the location communication unit, the multi-sensor unit, and the active heat dissipation unit. | 10-16-2014 |
20140316738 | APPARATUS AND METHOD FOR MEASURING POSITION OF LIGHT - An apparatus and a method for measuring a position of a light are disclosed. The apparatus for measuring a position of a light includes: an inputting unit configured to receive position information on a building and a floor in which a user is positioned; a position coordinate calculating unit configured to measure distances between a position of the user and wall surfaces in the building in each direction and calculate a position coordinate of the user based on the distances in each direction; a position determining unit configured to apply the position coordinate to a plan view corresponding to the position information to determine an initial position of the user; and a position information combining unit configured to receive a light identifier depending on movement of the user and store position information of the light corresponding to the light identifier. | 10-23-2014 |