Korea Electronics Technology Institute

Won Gi Jeon

Dong Sun Kim

Jung Wook Wee

Jeong Wook Seo

Kyung Won Park

Ki Won Kwon

Yong Hwan Kim

Seong Jun Kim

Youn Sung Lee

Kyung Taek Lee

Jong Ho Paik

The described technology generally relates to a scalable high efficiency video coding (SHVC)-based ultra-high definition (UHD) image data transmission and reception system. The SHVC-based UHD image data transmission and reception system includes an image data collector configured to collect various kinds of image data and additional data of the image data. The system also includes an image data coder configured to code the image data and the additional data by using an HEVC-based scalable video coding scheme, and an image data transmitter configured to transmit at least one of a portion of the coded image data and the coded additional data to a terminal via a communication network.

SHVC-based UHD image data transmission and reception system

Disclosed are an apparatus and a method for detecting a broadcasting signal. The signal detecting apparatus according to the exemplary embodiment of the present invention includes: a reference signal generator outputting a reference signal acquired by performing a correlation calculation between a current sample and a previous sample of a received signal which is an FM signal or a digital radio mondiale plus (DRM+) signal and then normalizing a result of the correlation calculation; and a discriminator detecting a maximum value of the reference signal and judging that the received signal is the FM signal when the maximum value of the reference signal is more than a predetermined threshold.

Apparatus and method for detecting broadcasting signal

Disclosed herein is a hybrid channel estimation method and system for an Orthogonal Frequency Division Multiplexing (OFDM) wireless communication system. The hybrid channel estimation method includes the steps of acquiring a first channel coefficient using decision-directed channel estimation; acquiring a second channel coefficient using pilot-symbol-aided channel estimation; and calculating the final channel coefficient of a received signal by multiplying the first and second coefficients by first and second multiplication coefficients, respectively, and adding the multiplication results. The step of acquiring the first channel coefficient using the decision-directed channel estimation includes the steps of acquiring an initial channel coefficient by processing a long training symbol using a Least Square (LS) method; generating data by equalizing, demodulating and modulating a fast Fourier transformed new symbol using a previously estimated channel coefficient; and acquiring a new channel coefficient by dividing the new symbol by the data.

Hybrid type channel estimation method and system for mobile environment

The present invention relates to a method and apparatus for detecting STBC-OFDM signals in time-variant channels. The method includes a step of demodulating STBC-OFDM modulation signals into OFDM reception symbols using Fast Fourier Transform (FFT); a step of estimating a frequency response for each sub-channel; an STBC decoding step of calculating decision variables determining the A transmit data symbols that are transmitted during the B OFDM symbol periods for each sub-channel; and a step of determining the transmit data symbols based on the decision variables calculated at the STBC decoding step. In this case, the decision variables are calculated using a linear equation that allows a squared Euclidean distance from OFDM reception symbols, which are demodulated during the B symbol periods, to have a local minimum for each decision variable when the STBC encoding and the frequency responses estimated during the B OFDM symbol periods are applied.

Method and apparatus for detecting STBC-OFDM signals in time-variant channels

Disclosed herein is a method for eliminating the reception interference signal of a Space-Time Block Coded Orthogonal Frequency-Division Multiplexing (STBC-OFDM) system in a high-speed mobile channel. The method includes the following steps. At the first step, the gain of a channel combined at a receiving end is estimated in the case of using the STBC-OFDM system on a time-varying channel. At the second step, first temporary decision symbols are obtained by performing comparison on the estimated gain. At the third step, second temporary decision symbols are obtained using the first temporary decision symbols. At the fourth step, self-channel interference (SCI) terms are eliminated using the second temporary decision symbols and third temporary decision symbols are obtained. At the fifth step, final data symbols are obtained using the third temporary decision symbols.

Method for eliminating reception interference signal of space-time block coded orthogonal frequency division-multiplexing system in high-speed mobile channel

Growing community of inventors

Pyungtaek, South Korea

Won Gi Jeon