Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

Other

Korea Research Institute of Standards and Science

Dae Ho Kim

Tae-Gyu Kang

You Jin Kim

Sang-Kyu Lim

Il-Soon Jang

Yeong Jin Kim

Seung Jae Bahng

Chang Wahn Yu

Young Jo Bang

Youn-Ok Park

Youn Ok Park

Jun-Woo Kim

Hyung Jin Kim

Kyung Yeol Sohn

Hyunseok Kim

Seong Chul Cho

Nam Il Kim

Young Ha Lee

Sang Wook Lee

Hoon Do Heo

Do Young Kim

Jee Hwan Ahn

Mi Suk Lee

Youn Ho Jung

Hyung Kyu Kim

Chan Bok Jeong

Seong Hee Park

Hyeong Sook Park

Dong Seok Oh

Hyun Gu Hwang

Kyung Ho Yoon

Tae Soo Chun

Yong-Gyoo Kim

Wang Kee In

Eun Jeong Shin

Jae Kwon Kim

Jung Sik Sung

Heung Seok Kang

Kee Nam Song

Eon Young Hong

Byung Il Choi

Hye Kyung Jwa

Sang Bong Woo

Jung Yeol Oh

Ji Hun Jeon

Il Min Kim

Jong Cheol Kim

Gyung Jin Park

Hyun Myung Wu

Dong Weon Yoon

Kwang Min Hyun

Hyoung Oh Bae

Chang-Hwan Shin

A method for configuring a cluster may comprise selecting cluster members from among a plurality of communication nodes; identifying radio signal strength deviations between the cluster members; generating sensor groups by classifying the cluster members according to sensor types; selecting a head candidate group and a sensor candidate group of each of the sensor groups based on the radio signal strength deviations; selecting a cluster head in the head candidate group; selecting operating sensor nodes in the sensor candidate group; and configuring one among the operating sensor nodes as a virtual device, wherein the virtual device operates to transmit information obtained from the operating sensor nodes to the cluster head.

Method and apparatus for configuring cluster in wireless communication system

A lighting fault diagnosis method includes determining a fault item among a plurality of fault items based on fault symptom data of a test for each fault item, and recommending a repair method suitable for the determined fault item.

Method and system for vision-based automatic fault notification and classification of system lighting

A digital painting device and method. The digital painting device includes a generator to generate a color generation signal corresponding to color data in an electronic palette selected by an electronic brush, and a displayer to transmit the color generation signal to a light-emitting module that touches the electronic brush in a time period in which the color generation signal is maintained such that the color data is displayed on the light-emitting module.

Device and method for digital painting

An illumination control method includes calculating illuminances of a plurality of lighting apparatuses for at least one flat target surface on the basis of information regarding the lighting apparatuses stored in a database and flat target surface information received from a user, calculating an illuminance contribution of each of the lighting apparatuses for the at least one flat target surface on the basis of the illuminances of the plurality of lighting apparatuses for the at least one flat target surface, and calculating a luminance value of each of the lighting apparatuses on the basis of a target illuminance received from the user and the illuminance contribution of the lighting apparatus and controlling a luminance of each of the lighting apparatuses for luminance of the plurality of lighting apparatuses.

Method and apparatus for automatically controlling illumination based on illuminance contribution

A dual cap for protecting a humidity sensor of a radiosonde of an aerological observation system includes an outer cap and an inner cap. The dual cap surrounds the humidity sensor. The outer cap has an outer ventilation hole formed in its top, and an outer air circulation opening formed in its side periphery. The side periphery of the outer cap also has a first wall that acts as a barrier to air flow. The inner cap is affixed to and is disposed inside of the outer cap. A ceiling of the inner cap faces the outer ventilation hole so as to impose a barrier to air flow. The inner cap further has an inner ventilation hole in its top and an inner air circulation opening formed in its side periphery. The inner air circulation opening faces the first wall of the outer cap.

Dual cap for protecting humidity sensor of radiosonde

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.

High speed data serial connection interface apparatus, CPRI transmitting and receiving method

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.

Method and apparatus for transmitting and receiving data using visible light communication

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.

Uplink synchronization method between terminal and base station

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.

Receiving apparatus in OFDM system and receiving method

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.

Apparatus and method for detecting code

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) is calculated on the basis of a length (D) of encoded input data and a set of second parameters (f) is calculated on the basis of a set of prime numbers constituting a value of the length (D) of the input data. Interleaving is performed on the basis of the set of first parameters (f), the set of second parameters (f), and the length (D) of the input data.

Data rate matching method and apparatus for use in mobile communication systems

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.

Data transmitting and receiving apparatus and method for 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.

Method and apparatus for transmitting data using visible light communication

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.

Method for detecting random access signal

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.

Method and apparatus for decomposing received symbol signal modulated with bit reflected gray code in bit information

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Daejeon, South Korea

Dae Ho Kim