• Proceedings of the KIEE Conference
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• 2000.07d
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• pp.2614-2616
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• 2000

This paper presents the Walsh-Fourier conversion algorithm and Signal Analysis Technique. The Fourier coefficients are determined as the combinations of the Walsh coefficients in terms of the new Walsh-Fourier conversion algorithm. This paper checks the analysis of the Walsh-Fourier spectra and the approximate synthesis of the waveform via one example.

• Proceedings of the IEEK Conference
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• 2007.07a
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• pp.277-278
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• 2007

본 논문에서는 Film의 물리적인 특성을 Modeling하여 Film신호가 아닌 영상신호를 Film신호 특성을 갖도록 함으로써, Color가 보다 풍부한 느낌이 들게 하고 어두운 부분과 밝은 부분의 Dynamic Range를 확대하여, 일반 Video신호 영상을 필름 영화와 같은 Color효과를 갖도록 변환하는 방법에 대해 제안한다.

• Proceedings of the KIEE Conference
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• 1993.07a
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• pp.450-452
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• 1993

In this study, a method is suggested to design the A/D conversion system which has high resolution to convert load cell signal. First, hardware was designed to reduce the offset voltage of integrator and comparator. And then, a calibration software technique was performed to obtain the stable data from A/D converter. The optimal parameters of each elements in the circuits was selected using the SPICE simulation. The main advantage of our method is high precision A/D converter can be constructed with low cost and high confidence. Therefore proposed method is expected to be used in the industrial field where a high precision measurement is required.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.5
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• pp.893-898
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• 2017

A TDC(Time-to-Digital Converter) of counter-type is designed by $0.18{\mu}mCMOS$process and the supply voltage is 1.5 volts. The converted error of maximum $T_{CK}$ is occurred by the time difference between the start signal and the clock when the period of clock is $T_{CK}$ in the conventional TDC. And the converted error of -$T_{CK}$ is occurred by the time difference between the stop signal and the clock. However in order to compensate the disadvantage of the conventional TDC the clock is generated within the TDC circuit and the clock is synchronized with the start and stop signals. In the designed TDC circuit the conversion error is not occurred by the difference between the start signal and the click and the magnitude of conversion error is reduced (1/2)$T_{CK}$ by the time difference between the stop signal and the clock.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.26 no.6
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• pp.890-896
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• 2022

In this paper, gimbal camera control through smart gloves was implemented to increase convenience and accessibility to the control of drones used in various fields. Smart gloves identify human gestures and transmit signals through Bluetooth. The received signal is converted into a signal suitable for the drone through a GCS (Gound Control Station). Signals from smart gloves are expressed in a quaternion method to prevent gimbal locks, but for gimbal cameras, conversion is required to use Roll, Pitch, and Yaw methods. The data conversion mission is performed in the GCS. The GCS transmits an input signal to the control board of the drone through Wi-Fi. The control board generates and outputs the transmitted signal in a PWM manner. The output signal is input to the gimbal camera through the SBUS method and controlled. The input signal of the smart glove averaged 0.093 s and up to 0.099 s to output to the gimbal camera, showing that there was no problem in real-time use.

• Journal of the Korean Institute of Navigation
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• v.24 no.5
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• pp.435-441
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• 2000

This paper deals with the development of RACOM(Radar Signal Detecting ＆ Processing Computer). RACOM is a radar display system specially designed for radar scan conversion, signal processing and PCI radar image display. RACOM contains two components； i )RSP(Radar Signal Processor) board which is a PCI based board for receiving video, trigger, heading & bearing signals from radar scanner ＆ tranceiver units and processing these signals to generate high resolution radar image, and ⅱ）Applications which perform ordinary radar display functions such as EBL, VRM and so on. Since RACOM is designed to meet a wide variety of specifications(type of output signal from tranceiver unit), to record radar images and to distribute those images in real time to everywhere in a networked environment, it can be applicable to AIS(Automatic Identification System) and VDR(Voyage Data Recorder).

• Proceedings of the KIEE Conference
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• 1988.07a
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• pp.426-429
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• 1988

A simple design method of a single balanced MMIC mixer is described. It uses small signal S11 and capacitive load for the input matching circuit and the output loading circuit, respectively. It is found that the conversion gain of the FET mixer is independent of FET gate width. The fabricated mixer has 2.5 dB conversion gain at 9 GHz with 50 ohm IF load and 2 dBm local oscillator power.

• Journal of the Korean Graphic Arts Communication Society
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• v.25 no.1
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• pp.65-80
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• 2007

The input and output device requires precise color representation and CMS (Color Management System) because of the increasing number of ways to apply the digital image into electronic publishing. However, there are slight differences in the device dependent color signal among the input and output devices. Also, because of the non-linear conversion of the input signal value to the output signal value, there are color differences between the original copy and the output copy. It seems necessary for device-dependent color information values to change into device-independent color information values. When creating an original copy through electronic publishing, there should be color management with the input and output devices. From the devices' three phases of calibration, characterization and color conversion, the device-dependent color should undergo a color transformation into a device-independent color. In this paper, an experiment was done where the input device used the linear multiple regression and the sRGB color space to perform a color transformation. The output device used the GOG, GOGO and sRGB for the color transformation. After undergoing a color transformation in the input and output devices, the best results were created when the original target underwent a color transformation by the scanner and digital camera input device by the linear multiple regression, and the LCD output device underwent a color transformation by the GOG model.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.10 no.1
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• pp.90-98
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• 1999

This paper presents a wideband single-balanced mixer using a diode which can be used in RF receiver of microwave measurement systems. For wideband characteristic, local oscillator(LO) signal is provided to diode with low loss using a coplanar waveguide-to-slotline balun. For high isolation characteristic radio frequency (RF) port and intermediate frequency (IF) port are designed using directional coupler. This mixer presents 30.5~31.17dB conversion loss whose flatness is within 1dB for 9 kHz~2.6 GHz wideband RF signal, and above 30 dB isolation for LO signal.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.24 no.10A
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• pp.1494-1500
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• 1999

In order to provide high speed multimedia data rate service, Multi-Code CDMA has been proposed which converts high speed serial data stream into N parallel low speed data streams with orthogonal PN codes for spreading. However this signal has multi level and causes interferences to be increased at the neighboring cell boundary in the reverse link. Therefore in order to solve the above mentioned problem, M/B-MC/CDMA, in which multi level signal is converted to binary level signal using M/B conversion, is proposed and the performance is compared with MC-CDMA.