Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

So-Ra Park

Soo-In Lee

Heung-Mook Kim

Sung-Ik Park

Hyun Jae Lee

Min-Su Kim

Yong-Tae Lee

Sung-Joon Kim

Hyoungsoo Lim

Jong-Soo Lim

Geon Lyang Kim

Young-Ho Jeong

Young-Kwon Hahm

Bong-Ho Lee

Hyun-Jung Yoo

Chang-Ho Yun

A method of operating a memory device, a first setting signal is received by a first memory device among a plurality of memory devices. The first memory device has a first storage capacity, and the memory devices may be connected to one another by a single channel. A second setting signal is received by a second memory device among the plurality of memory devices. The second memory device has a second storage capacity different from the first storage capacity. N refresh operations are performed by the first memory device based on a first refresh command and the first setting signal during a first refresh period. M refresh operations are performed by the second memory device based on a second refresh command and the second setting signal during a second refresh period. A duration of the second refresh period is substantially the same as a duration of the first refresh period.

Method of refreshing memory device and memory system based on storage capacity

A traffic light control apparatus and method is provided. The traffic light control apparatus for controlling an emergency vehicle in a traffic network includes: a traffic network control unit configured to determine overall traffic network control and traffic light control for supporting movement of the emergency vehicle during an emergency and transmit a control signal; a traffic light control unit configured to receive the control signal to control a traffic light; and an emergency vehicle control unit configured to transmits a traffic light control mode cancellation request signal to the controlled traffic light.

Apparatus and method for controlling traffic light

Provided is an apparatus and method for estimating inverse channel of a repeater's receiving channel, which ensures stability and causality by generating a time-domain filter coefficient having information on an inverse channel of repeater's receiving channel from a signal transmitted from a main transmitter or another repeater. The apparatus includes: a channel estimator for estimating a channel established by a transmission path from a received signal; an inverse minimum phase filter coefficient generator for generating inverse channel of a minimum phase channel from the estimated channel, and converting the inverse channel of the minimum phase channel into a time-domain filter coefficient; an inverse group delay filter coefficient generator for generating a time-domain filter coefficient by using the estimated channel and the minimum phase channel; and a combiner for generating an inverse channel of a receiving channel in a time domain by combining the filter coefficient and the filter coefficient.

Apparatus and method for estimating inverse channel of repeater's receiving channel

The in-band adjacent-channel digital audio broadcasting system includes a scrambling unit for scrambling a signal to be broadcasted, thereby generating a scrambled signal; an outer coding unit for performing a first encoding of the scrambled signal, thereby generating an outer encoded signal; an outer interleaving unit for performing a first interleaving of the outer encoded signal a byte by byte basis, thereby generating an outer interleaved signal; an inner coding unit for performing a second encoding the outer interleaved signal, thereby generating an inner encoded signal; an inner interleaving unit for performing a second interleaving of the inner encoded signal, thereby generating an inner interleaved signal; a modulating unit for modulating the inner interleaved signal, thereby generating an orthogonal frequency division multiplexing (OFDM) symbols; a guard interval inserting unit for inserting a guard interval between the OFDM symbols in order to eliminate an inter-symbol interference, thereby generating an OFDM frame; and an RF processing unit for performing a conversion of the OFDM frame into an analog radio frequency signal so that the OFDM signal can be transmitted in a specific frequency channel of an FM frequency band, and for amplifying and outputting the analog radio frequency signal.

In-band adjacent-channel digital audio broadcasting system

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Seoul, South Korea

So-Ra Park