• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.40 no.5
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• pp.454-460
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• 2012

DTC(Data Terminal Controller) for UAV has been developed using FPGA. It provides the functions of Error Correction and Time-division Mux/Demux for stable data-link. RTOS VxWorks also has been used for real-time control of data-link. FPGA Design of DTC facilitates the modification and extension of various I/O device, and VxWorks ensures real-time availability of data-link control and provides flexibilities of changes of S/W design. The DTC is expected to be deployed easily for various UAV systems.

• Journal of the Optical Society of Korea
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• v.13 no.3
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• pp.354-360
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• 2009

We investigate theoretically the tolerance of 40 Gbps phase-modulated (PM) duobinary signals using a vestigial sideband (VSB) filter on impairments which occurred in dense wavelength-division multiplexing (DWDM) systems, compared to the conventional duobinary signals. Our simulation results show that PM duobinary signals can't have the gain on the spectral efficiency achieved by utilizing the VSB filtering technique. In order to increase the spectral efficiency, they indispensably require to be transmitted at the optimum bandwidth of multiplexer (MUX) and demultiplexer (DEMUX) since they are susceptible to inter-channel crosstalk. It is also shown that the PM duobinary modulation format has a large tolerance on self-phase modulation (SPM) and cross-phase modulation (XPM) under the condition which MUX and DEMUX have been tuned at an optimum bandwidth; it has 1.2 dB power penalty at the fiber launching power (FLP) of 15 dBm and the channel spacing of 50 GHz.

• 전자공학회논문지 IE
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• v.45 no.4
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• pp.1-6
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• 2008

A fast-hopping frequency synthesizer that reduces complexity and power consumption is presented for MB-OFDM UWB applications. The proposed architecture uses 3960 MHz LC VCO, 528 MHz ring oscillator, passive mixer and LC-tuned Q-enhancement BPF to generate Band Group 1 frequencies. The adjacent channel rejection ratio is less than -40 dBc for 3432 MHz and -H dBc for 4488 MHz. A fast switching SCL-tpre MUX is used to produce the required channel output signal and it takes less than 2.2 ns for band switching. The total power consumption is 47.9 mW from a 1.8 V supply.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.05a
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• pp.504-505
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• 2012

This paper represent a method of efficiency multimedia processor. Also in case of application fields, we propose the water marking area. It is a insert the authorized information method, namely watermark, according the a little change data in area which human can not cognitive visible or acoustic.

• Proceedings of the IEEK Conference
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• 2000.11a
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• pp.295-298
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• 2000

본 논문은 ATM교환기에서 Non-ATM정합을 위한 미디어게이트웨이의 개발방안과 하드웨어, 소프트웨어 구조에 대해서 기술한다. 미디어게이트웨어의 하드웨어 구조는 ATM계층처리보드와 다중화처리보드 및 서비스보드들로 구분되며 Non-ATM을 서비스별로 처리할 수 있는 보드를 모듈당 최대 8매까지 실장 할 수 있다. 다중화처리보드는 ATM셀 MUX/DEMUX기능과 IPC송수신기능을 처리하고 서비스보드의 링크상태관리, 운용기능을 수행한다. 서비스보드의 종류는 프레임릴레이, 회선대행, AAL2 트렁킹, N-ISDN중계선 연동기능을 각각 수행한다.

• Proceedings of the Korea Multimedia Society Conference
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• 2003.11a
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• pp.187-190
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• 2003

본 논문에서는 다차원 멀티미디어 데이터의 효율적인 스트리밍과, 다차원 입체 시스템 정보의 효율적인 전송을 위한 (역)다중화기를 제안하였다. 제안한 (역)다중화기는 MPEG-2를 TransMux Layer Tool로 이용하였으며 HPEG-4 시스템을 기반으로 설계되었다 다차원 입체 시스템의 구동을 위한 부가 정보는 본 논문에서 제안한 설러 가지 descriptor를 통해, 다차원 멀티미디어 데이터인 다시점 비디오, 스테레오 오디오, 합성 영상과 함께 수신부로 전송된다. 제안한 (역)다중화기는 다차원 입체 시스템에 매우 적합하며, 다른 시스템과의 호환성도 매우 우수하다.

• Proceedings of the IEEK Conference
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• 2003.07a
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• pp.378-381
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• 2003

This paper presents a design and implementation of 10gigabit ethernet frame multiplexer/demultiplexer. In this paper, we discuss gigabit and 10 gigabit ethernet standard interfaces(GMII/XGMII) and we propose multiple gigabit ethernet frame multiplexing/demultiplexing scheme to handle 10gigabit ethernet frame instead of using 10gigabit network processor. And then 10gigabit ethernet frame MUX/DMUX is designed, verified and implemented using FPGA.

• Journal of the Korean Institute of Telematics and Electronics A
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• v.32A no.5
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• pp.749-758
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• 1995

There are many testable design techniques, among which Scan path and BIST techniques are mainly used. In this paper, the increase of design effectiveness is discussed, when these techniques are applied to the practical implementation of chips. The following techniques are presented : 1) Blocks are commonly used to reduce test time without hardware increase, 2) MUX is used to implement the shortest Scan path, 3) Scan register is used which controls and/or observes several blocks to avoid the increase of hardware.

• Proceedings of the KIEE Conference
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• 2007.04a
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• pp.369-372
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• 2007

about commercial business of car black box, mirror vision for car black box deal with analysis of Existing Car Black boxes in market to provide the objective information associated with surrounding scene of car instead of witness, we experimented on suitable structure of all direction to cover surrounding of car considering dead zone where can't see at short distance and realized simple structure of gathering scene using mirror and lens and by saving the number of camera and MUX of pre-circut

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.05a
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• pp.10-10
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• 2004

유전율이 서로 다른 물질을 나노 크기로 주기적으로 배열하여 황자 띠간격(Photonic bandgap)을 이루게 하는 광결정(Photonic crystal)에 인위적인 결함을 부가하여 광파워 분배 및 Mux/Demux 등 광회로 기능 수행을 할 수 있도록 집적화한 광도파로 소자가 미래형 정보통신사회를 위한 초고집적화, 초고속화, 저전력 및 신기능 등의 특성을 위하여 요구된다. 이러한 나노 광결정 소자는 다양한 방법으로 제작이 시도되고 있는데, 나노 임프린트 기술은 실장밀도가 높으며, 수십 나노급의 패턴이 주기적으로 배열된 구조물의 성형에 큰 장점이 있어서 본 연구에서 다루어졌다.(중략)