• 한국통신학회논문지
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• 제16권8호
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• pp.770-784
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• 1991

본 연구에서는 유럽방송연맹 규격의 라디오 데이터 시스템 수신기 개발을 위하여 그의 소수신 구성과 데이터 구조에 대하여 연구하였다. 5가지 기본 기능처리를 위한 프로그램을 개발하여쏘 자동 동조와 lcd 표시부 구성에 관하여 실험하였다. 기존의 FM 차량용 수신기와 완전 양립성을 확보하였으며, 그의 실현을 하드웨어 실험을 통하여 확인하였다.

• 한국정보통신학회논문지
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• 제7권4호
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• pp.623-629
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• 2003

본 논문은 CATV 망 관련 장치 구현에 관한 것으로 기존의 수동형 장치의 비효율성을 제거하기 위해 자동화된 집중식 Headend 시스템 및 분배장치를 구현하였다. 이를 위해 기존의 주파수대역 중에서 비디오 신호의 송신에 사용되지 않은 대역을 확보하고 이를 제어신호의 송ㆍ수신이 이루어지는 제어대역으로 사용하는 송수신 시스템 및 자동화 분배기를 설계하였으며, 상ㆍ하향통신 및 하향통신방식이 공유된 형태로 RS-232를 이용한 9600bps의 CATV 망을 위한 통합관리 시스템을 구현하였다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 1998년도 제 23회 정기총회 및 추계학술발표회
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• pp.65-73
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• 1998

Ship's positino data obtaining method is ine of the very important factor innavigation . Nowadays, GPS(Global Positioning System) using the earth orbiting satellites are equipped and operated for the position finding. Because it provides more precise position information than other equipments and is very convenient for navigator. In this study, it is designed to develop the GPS simulator for everybody being able to proactise the GPS operating skill like as navigation planning, navigation calculating etc. And also, it can be operated with personal computer without real GPS receiver. This simulation system is based on the real GPS receiver system and built by the visual basic 5.0 program. And it displays the ship's position and navigating information and plots the ship's moving track on the screen in real time according as initial setup data-main engine's rpm, rudder angle, depature position and waypoint.

• 한국자동차공학회논문집
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• 제11권5호
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• pp.70-76
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• 2003

An experimental study was performed to understand the heat transfer and fluid dynamic characteristics of Sub-Cooled Hybrid Condenser (SCHC), which conventional condenser and receiver dryer are integrated into. SCHC also employs a sub-cooled refrigerant passages at the end of the condenser in order to supply perfect liquid refrigerant to the expansion unit. Throughout the present study, it was found that the developed SCHC increases in the degree of sub-cooling by 10~100% compared to conventional condenser. The excessive sub-cooling has improved the cooling performance by 10%, and that leads reduction in evaporator outlet air temperature by $1.5^{\circ}C$. Also found through the study is that the refrigerant pressure drop across SCHC is fairly increased due to insertion of the desiccant cartridge in the receiver tank which is composed of zeolite, filter and supporter plate.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 하계학술대회 논문집 Vol.3 No.2
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• pp.1088-1092
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• 2002

This paper introduces that domestic animals can be effectively administered with an individual recognition system. The system was constructed in original code transmitter, receiver, personal computer, micro-processor, and RS485 telecommunications module. In the individual recognition system. the signal including encoded information about a milk-cow was transmitted from an original code transmitter to a micro-processor through RS485 telecommunications module. The transmitted signal was successfully displayed in a personal computer.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 하계학술대회 논문집 Vol.3 No.2
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• pp.1075-1079
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• 2002

This paper presents a result of sound transmitting system with power line communication technique, Sound transmitting system is a transmitter which transmits modulated audio signal to power to power line and receiver which is capable of detesting it with earphone or speaker. It has been evaluated with the frequency characteristics and spectrum analysis. And, from the result of evaluation on the developed system, we confirm the superior sound transmitting characteristics, and the possibility of application on a language laboratory.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.114.6-114
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• 2001

According to expansion of wireless communication system and mobile device, interest has been growing in personal navigation system integrated with wireless system. In portable consumer electronics, such as cellular phones, GPS and PDA, one of major design factors is the power consumption. Solutions of reducing the power dissipation are low voltage, low system clock power management and so on. This paper develops a GPS receiver based on the advanced power management algorithm that achieves very low average power consumption. Both RF and DSP chips are powered down and reactivated only when the position fixing is required. In order to run, the developed includes the RTC calibration function and the fast reacquisition function using XMC (eXtended Multiple Correlator) ...

• 제어로봇시스템학회논문지
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• 제20권9호
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• pp.977-983
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• 2014

A repeat-back jamming signal is an intentionally re-broadcasted GNSS (Global Navigation Satellite System) interference. In this paper, a novel repeat-back jamming detection scheme is proposed. The proposed scheme uses a combined pseudo random noise signal (C-PRN) and is available for a generic GNSS receiver with a single antenna. The C-PRN signal is made by combining several received pseudo random noise signals that had been transmitted from the visible GNSS satellites. Through a Monte-Carlo simulation, the detection probability of a repeat-back jamming signal detected with the proposed scheme is presented.

• 대한자기공명의과학회:학술대회논문집
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• 대한자기공명의과학회 2001년도 제6차 학술대회 초록집
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• pp.178-178
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• 2001

목적： 본 연구에서는 초당 $10^{9}$ 부동점 연산이 가능한 Texas Instrument사의 TMS320C6701 DSP를 이용하여 연속적으로 변하는 경사자계를 real-time으로 계산하여 후, 4 채널의 phase array 코일을 이용하여 영상을 얻은 후 빠른 재구성을 통하여 영상을 확인할 수 있는 spectrometer를 개발하였다. 대상 및 방법： 실시간 구현을 위하여 DSP 보드에 Texas Instruments(Tl)사의 TMS320C6701을 장착하였다. Transmitter, receiver, 그리고 gradient를 담당하는 DSP 보드들과 이들과 연결되어 rf modulation, gradient waveform을 만드는 analog board와 phased array coil을 위한 4 채널까지 측정이 가능한 receiver board로 구성하였다. Gradient 보드의 경우 각 경사자계의 채널(Gx, Gy, Gz)의 sampling points를 real-time으로 각각 계산함으로써 blipped-EPI 뿐만 아니라, 경사자계 파형이 연속적으로 변화하는 spiral-EPI의 실험도 가능하게 하였다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1997년도 춘계학술대회 논문집
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• pp.756-760
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• 1997

In this research, the automatic level measurement system used in land leveling was developed. By using a laser transmitter and a receiver as measuring equipments, level was measured automatically. The driving part of this system was composed of stepping motor, timing belt and pulley. It drived the laser receiver to track laser beam generated form the laser transmitter. The level measuring experiments were performed about three level change shapes (step, random, sine). This system could measure step level change of which amplitude was 40mm in 0.5s, random level change within .+-. mm, maximum measurement error. In case of sine level change, experiment was executed with varying the spatial frequency of level change. As a result, this system was able to measure sine level change of which spatial frequency was 0.5m $^{-1}$ accurately.