Electronics and Telecommunications Research Institute

Intellectual Discovery Co., Ltd.

Korea Telecommunication Authority

Korea Telecom

Mtekvision Co., Ltd.

Hee-Bum Jung

Kyung-Soo Kim

Ik-Soo Eo

Nak Woong Eum

Hyuk Joo Kim

Jung-Bum Kim

Kyung-Jin Byun

Won-Chul Song

In-San Jeon

SooCheol Oh

Gyuil Cha

Seong Mo Park

Jong-Kee Kwon

Kyung Jin Byun

Chull Won Ju

Chei-Yol Kim

Jonghyurk Park

Tae-Joon Kim

In-Gi Lim

Kyoung-Soo Kim

Jong-Dae Kim

Suk Ho Lee

Seong-Do Kim

Han-Jin Cho

Nak-Woong Eum

Kyoung Seon Shin

Jae-Seok Kim

Sang-Hoon Chai

Ig Kyun Kim

YoungSeok Baek

Yong Il Jun

Jin Ho On

Kwi-Dong Kim

Young-Seok Baek

Kyungtae Han

Hye-Ju Seo

Iksoo Eo

Disclosed is an operating method of a surface code-based quantum simulation device including physical qubit storage, which includes storing initialized entanglement states of logical qubits corresponding to different distances, receiving a surface code-based initialization request corresponding to a specific distance, and storing an initialized entanglement state of a logical qubit corresponding to the specific distance from among the initialized entanglement states of the logical qubits corresponding to the different distances in the physical qubit storage.

Quantum simulation device and operating method of quantum simulation device

Disclosed is a quantum computing system including a first quantum chip including first physical qubits, a second quantum chip including second physical qubits, and a management device. The management device includes a physical qubit layer that manages physical qubit mapping including information about physical channels between first and second physical qubits, an abstraction qubit layer that manages abstraction qubit mapping including information about abstraction qubits and abstraction channels between the abstraction qubits based on the physical qubit mapping, a logical qubit layer that divides the abstraction qubits into logical qubits and to manage logical qubit mapping including information about logical channels between the logical qubits, based on the abstraction qubit mapping, and an application qubit layer that allocates at least one logical qubit corresponding to a qubit request received from a quantum application program based on the logical qubit mapping.

Quantum computing system and operation method thereof

An apparatus for processing a register window overflow and underflow includes register windows each configured to include local registers and incoming registers, dedicated internal memories configured to store contents of the local registers and the incoming registers for each word, dedicated data buses configured to connect the local registers and the incoming registers and the respective dedicated internal memories, a memory word counter configured to perform counting in order to determine whether or not there is a storage space of a word unit in the dedicated internal memories, and a logic block configured to control an operation of the dedicated data buses when one of a window overflow and a window underflow is generated based on the count value of the memory word counter.

Apparatus for processing register window overflow and underflow

A motion vector extraction method includes: deciding on a search start position in an original video and performing a spiral motion search; and determining whether or not to perform a search in a sub-sampling video, during P picture search.

Motion vector extraction method and apparatus

Provided is an adaptive motion search range determining apparatus and method for encoding UHD-class high-resolution images. The adaptive motion search range determining apparatus includes an MVD average/standard deviation calculation unit calculating an value average and a standard deviation of MVDs of neighboring macroblocks of a current macroblock, and a motion search range determination unit determining a motion search range of the current macroblock using the value average and the standard deviation. According to the adaptive motion search range determining apparatus, it is possible to enable each macroblock to have an adaptive search range by variably adjusting a motion vector search range of a current macroblock with reference to motion vectors of neighboring macroblocks of the current macroblock.

Adaptive motion search range determining apparatus and method

An RF device is provided. The RF device includes a vibratile carbon nanotube having a nanotube natural frequency (f), a negative electrode fixed to a first end of the carbon nanotube, a vibratile tuning electrode having a variable resonance frequency and facing a second end of the carbon nanotube, and a positive electrode electrically connected to a first end of the tuning electrode. A second end of the tuning electrode is adjacent to the second end of the carbon nanotube, and the carbon nanotube vibrates at a carrier frequency according to an external electromagnetic wave having the carrier frequency, and the tuning electrode having variable resonance frequency characteristics amplifies distance variation between the second end of the carbon nanotube and the second end of the tuning electrode to increase an electron emission sensitivity according to field emission.

Radio frequency device comprising a vibratile carbon nanotube and a vibratile tuning electrode

A waveform interpolation speech coding apparatus and method for reducing complexity thereof are disclosed. The waveform interpolation speech coding apparatus includes: a waveform interpolation encoding unit for receiving a speech signal, calculating parameters for a waveform interpolation from the received speech signal, and quantizing the calculating parameters; and a realignment parameter calculating unit for restoring a characteristic waveform (CW) using the quantized parameter, calculating a realignment parameter that maximizes a cross-correlation among consecutive CWs for the restored CW.

Waveform interpolation speech coding apparatus and method for reducing complexity thereof

Provided is an apparatus for generating a ranging binary code sequence at a high-speed, and a method thereof. The apparatus includes: an initial register value generator for generating initial register values of minimum valid ranging codes; a storage for storing the generated initial register values of the valid ranging codes(&#x2266;K, where K is the ranging value transmitted by base station); a binary code sequence generator for generating a binary code sequence of a corresponding ranging code; and a procedure for incrementally updating the initial register values as receiving the new ranging code from base station.

Apparatus for generating ranging binary code sequence at high-speed, and method thereof

Disclosed is a V-BLAST system for a MIMO communication system. In the V-BLAST system for a MIMO communication system, a pseudo inverse matrix calculator receives a channel transfer function matrix including channel information and produces a cofactor matrix and a determinant for a pseudo inverse matrix. A norm & minimum calculator calculates a minimum index for the cofactor matrix outputted from the pseudo inverse matrix calculator, a weight vector selector selects a row vector having the minimum index and calculates a transposed matrix for the row vector; an adder adds the transposed matrix to a received input symbol, and a subtractor subtracts the determinant to the output. A demapper performs a determined function operation to the output and produces estimated information.

Processing device for a pseudo inverse matrix and V-BLAST system

A hybrid trace back apparatus and a high-speed Viterbi decoding system having the same are disclosed. The hybrid trace back apparatus includes: a register exchanging unit for receiving survivor values of each states from a path metric calculator, and obtaining a block survival value through a register exchange operation as much as a bit length for a block trace back operation; a first storing unit for the register exchange operation; a second storing unit for storing the block survival value obtained through the register exchange operation until the block survival value is written in a block trace back memory; and a block trace back unit for outputting decoded data by performing a block trace back operation while writing a value of the second storing unit.

Hybrid trace back apparatus and high-speed viterbi decoding system using the same

Provided are a flexible bit rate code vector generation method and a wideband vocoder employing the same. This invention implements a flexible bit rate by getting three code vectors which are composed of 24, 16, and 8 pulses, at a time in a search process, through improvement of an algebraic codebook search process in a wideband AMR-WB vocoder. The method includes the steps of: performing a preprocess, wherein the preprocess divides a sub-frame by tracks and decides a pulse position having a maximum value in each track; among a plurality of pulses to be searched, fixing a same number of pulses as the tracks to the position with the maximum value of each track sequentially, and searching optimal positions having a minimum error with a target signal by combining two pulses in two consecutive tracks for the remaining pulses; and creating a code vector with flexible bit rate.

Method for flexible bit rate code vector generation and wideband vocoder employing the same

Disclosed is an apparatus for performing both FHT (Fast Hadamard Transform) and FFT (Fast Fourier Transform). This apparatus determines the phase coefficients as constantly '1' when performing the FHT, and changes the input order of input data to a reverse order of bits when performing the FFT. In addition, the apparatus, which can process a plurality of input data sets simultaneously, classifies the received signals into multi-path signals and multi-antenna signals, thus processing the multi-path signals separately from the multi-antenna signals, or directly processes multi-antenna signals.

Apparatus and method for selectively performing Fast Hadamard Transform or Fast Fourier Transform

A Fast Fourier Transform (FFT) apparatus for selectively performing Fast Hadamard transform (FHT), and a complementary code keying (CCK) modulation/demodulation apparatus using the same. An OFDM module and CCK module are integrated as one module having lower complexity compared to conventional scheme by embodying the CCK modulation using FFT structure in the OFDM module, and embodying the suboptimal and the optimized CCK modulations using FFT structure in OFDM module. CDMA, OFDM, CCK modules may be integrated as single module.

Apparatus of selectively performing fast hadamard transform and fast fourier transform, and CCK modulation and demodulation apparatus using the same

In the apparatus and method for separating carrier of multicarrier wireless communication receiver system, each carrier separation is performed after a quantization in a wireless communication receiver system such as a received multicarrier CDMA (Code Division Multiple Access) etc., to thereby reduce the whole number of quantizers and separate multicarrier from a received signal. For that, the apparatus for separating the carrier of the multicarrier wireless communication receiver system includes an internal oscillating unit for generating internal multicarrier; a plurality of frequency transition units for respectively down-converting the multicarrier generated by the internal oscillating unit and moving it to frequency of '0' as a frequency center; and a plurality of filtering units for individually filtering the respective carrier moved by the plurality of frequency transition units to the frequency center as the frequency of '0', through a low frequency pass band and for providing it as an input of a rake receiver.

Apparatus and method for separating carrier of multicarrier wireless communication receiver system

There is provided an adaptive loop gain control circuit for a voltage-controlled oscillator (VCO). The adaptive loop gain control circuit for a voltage-controlled oscillator (VCO) includes a detected voltage generating unit which generates a detected voltage signal according to changes in an operating voltage and an operating temperature, and a control circuit unit which outputs an oscillation control current signal according to the detected voltage signal and an input control voltage signal. The adaptive loop gain control circuit for a voltage-controlled oscillator (VCO) compensates for an oscillation control current according to changes in operating voltage and temperature and compensates for the gain of a phase locked loop (PLL) system, thereby ensuring high operating stability in the PLL circuit.

Growing community of inventors

Daejeon, South Korea

Hee-Bum Jung