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- W4367295024 abstract "본 논문에서는 한반도 지역에서 저궤도 위성의 고도 및 하향링크 주파수에 따른 도플러 편이를 분석하여 기술하고, 도플러 편이에 의한 DBPSK, DQPSK 변조 방식에서의 비트오율 열화와 이를 보상하기 위해 요구되는 클럭 보정 간격에 대한 시뮬레이션 결과를 제시하였다. 저궤도 위성 통신에서는 정지궤도 위성을 이용한 통신과 달리 위성과 지상국간의 상대 속도 차이로 인해 도플러 편이가 발생하게 되어 통신 성능이 저하되는 요인이 된다. Matlab 시뮬레이션을 통해 지상국의 위치를 대전으로 가정하였을 경우 550km 고도의 위성체가 반송파 주파수 7.75GHz를 사용할 때 도플러 편이의 최대값은 ±170.6kHz로 분석되었으며, 이를 보상하기 위해서는 DBPSK, DQPSK 변조 방식에서의 클럭 보정이 최소한 17초와 6.9초 이내에 이루어져야 한다." @default.
- W4367295024 created "2023-04-29" @default.
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- W4367295024 date "2023-04-30" @default.
- W4367295024 modified "2023-09-26" @default.
- W4367295024 title "Analysis and Compensation of Doppler Shift for Low Earth Orbit Satellite Communication in Korean Peninsula" @default.
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- W4367295024 doi "https://doi.org/10.14801/jkiit.2023.21.4.75" @default.
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