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송규익 경북대학교 전자기술연구소 1982 電子技術硏究誌 Vol.3 No.1
An analysis of amplitude-comparison lane multiplexing double sum-and-difference system using single channel IF amplifier is made in an attempt to specify the effects certain parameters have on system performance. The pattern of an antenna was discribed by a sinusoidal function for the convenience of analysis. The angle error detection curve has a tangential characteristic from the effect of automatic gain control system in the non-saturated region of the IF amplifier. Post-comparator phase shifts and voltage unbalance have an effect on the slope of the angle error detection curve. The effects of pre-comparator phase shifts are cancelled out in double sum-and-difference system. Only pre-comparator voltage unbalance results in a change of boresight indication. To complete the evaluation, the parameters which affect the receiving equipment performance have also been developed. Equations describing the performance of the system have been derived and system evaluation curves have been plotted using these equations.
宋奎翼 경북대학교 공과대학 1982 工大硏究誌 Vol.11 No.-
Servoed modulation slope FM/CW radio altimeter system performances, loop time constant and doppler shift compensation, are analyzed. The loop time constant has very low value which can be neglected. The doppler shift compensation is achieved in the output circuit of the period-to-voltage converter by sampling process.
Intermodulation Distortion in Variable-Resistance Diodes
Sohng, Kyu-Ik 경북대학교 공과대학 1983 工大硏究誌 Vol.12 No.-
可變抵抗다이오우드의 찌그러짐을 Volterra급수전개를 利用하여 解析하였다. 可變抵抗다이오우드의 intermodulation distortion에 對한 理論的 表現式을 유도하고, 實驗으로써 그 타당성을 입증하였다. 特히 2개의 다이오우드를 접속할 경우에 對한 찌그러짐을 解析하였으며, 다이오우드의 back-to-back 접속에 의한 찌그러짐의 현저한 減少가 나타남을 알았다.
숨겨진 오디오 비디오 시간 인덱스 신호를 사용한 DTV 립싱크 테스트
한찬호,송규익 대한전자공학회 2004 電子工學會論文誌-SP (Signal processing) Vol.43 No.1
This paper concentrated on lip synchronization (lip sync) test for DTV with respect to audio and video signals using a finite digital bitstream In this paper, we propose a new lip sync test method which does not effect on the current program by use of the transient effect area test signals (TATS) and audio-video time index lip sync test signals (TILS).the experimental result shows that the time difference between audio and video signal can be easily measured by captured oscilloscope waveform at any time. 본 논문은 오디오 비디오 신호에 대한 유한한 DTV 디지털 스트림을 사용한 립싱크 테스트에 관한 것이다. 본 논문에서는 프로그램 시청이 가능하면서, 과도 효과 영역 테스트 신호(transient effect area test signals, TATS) 및 오디오 비디오 시간 인덱스 립싱크 테스트 신호를 이용한 새로운 립싱크 테스트 방법을 제안한다. 실험 결과에서 제안된 방법은 오실로스코프의 비디오 트리거 모드를 사용하여 오디오 및 비디오 신호간의 시간차를 쉽게 측정할 수 있음이 확인되었다.
조진호,송규익,조영기 경북대학교 전자기술연구소 1985 電子技術硏究誌 Vol.6 No.1
The range detector output signal of a servoed modulation slope FM/CW rader is analytically displayed as a function of the range and Doppler shift. The influence of important system parameters like modulation frequency, frequency excursion and system loop time constant are also included in the analysis, The Doppler shift compensation is achieved in the output circuit of the period-to-voltage converter by analog-sample data filtering process.
李健一,宋奎翼 경북대학교 공과대학 1976 工大硏究誌 Vol.5 No.-
The telephone-number-digital-display-circuit is designed, which picks up initially a signal from dial pulses with little effect on telephone and can finally display the successive dial numbers on LED display unit up to 10 digits. The dynamic display system and TTL IC were used to simplify wiring and the number of logic gates, and to improve the performance respectively. This circuit was high reliable in the temperature range of 0°―70℃. It can be used to monitor dialing numbers to give confidence to subscribers, to test misconnecting troubles in telephone exchange offices, to inspect a complete dial set in a factories manufacturing the telephone set.