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이범선,박광규 대전대학교 산업기술연구소 1999 산업기술연구소 論文集 Vol.10 No.2
Based on the equilibrium equations and the D'Alembert principle, the governing equations for simple beam subjected to harmonic load are derived in this study. A trial eigenvalue method is used for determining the natural frequencies. The harmonic vibration analysis for an simple beam with an uniform cross-section, using finite element method, was investigated. The result in this study was consisted with the values obtained by other numerical method and SAP2000.
이범선,이일용,박정일,박경룡,연광일,어익수,강인,Lee, Bom-Son,Lee, Il-Yong,Park, Jung-Il,park, Kyung-Ryung,Yeon, Kwang-Il,Eo, Ik-Soo,Kang, In 한국전자파학회 1998 한국전자파학회논문지 Vol.9 No.3
복잡하고 다양한 전파 환경을 라이시안 채널로 모델링할 수 있는 가능성에 대해서 검토해 보았다. 라이시안 채널에서의 수신 신호를 컴퓨터 시뮬레이터를 제작하여 모의 실험하였고, 모의 실험된 신호의 PDF(포락선 크기의 분포), PSD(Power Spectral Density), LCR(Level Crossing Rate), ADF(Average Duration of Fades), BER(Bit Error Rate)를 이론치와 비교한 결과 매우 잘 일치함을 확인할 수 있었다. The possibility of modeling the complex and diversified radio environment using Rician channel has been considered. The signals received in Rician channel have been simulated using the computer simulator. The PDF(Probability Density Function of the Envelope amplitude), PSD(Power Spectral Density), LCR(Level Crossing Rate), ADF(Average Duration of Fades) and BER(Bit Error Rate) of the simulated signal have been compared with those of theory. They were shown to be in good agreement.