Joint Conference on Satellite Communications (JC-SAT) 2006, pp.1-8
Language
English
Type
Conference Paper
Abstract
ITU-R 은 긴급사안으로 결의 122를 통하여 47.2-47.5 GHz 및 47.9-48.2 GHz 대역에서 HAPS 지구국이 우주국 수신기와의 공유를 원활하게 하기 위해서 적용 가능한 전력 제한치를 연구할 것을 요청하였다. 하지만 현재까지 이것과 관련된 연구는 진행되지 않은 상태이다. 이미 개발된 권고서 ITU-R SF.1481-1를 통하여 HAPS 를 이용한 FS 시스템과 FSS 시스템간의 공유 가능성을 분석하기 위한 방법과 시스템특성 파라미터가 제시되었으며, 위 주파수 대역에서 일반적인 HAPS 에 대한 시스템 특성에 관하여 권고서 ITU-RF.1500에 또한 제시되었다. 본 논문에서는 결의 122 에 따라서 HAPS 지상국에 적용 가능한 전력 제한치에 대한 결과를 제시한다. 이미 권고서 ITU-R SF.1481-1 에 언급되었듯이 HAPS 지상국과 FSS 위성시스템간의 공유를 위해서는 충분한 이격거리가 필요하다. FSS 위성수신기로의 이러한 간섭레벨을 줄이기 위해서 HAPS 지상국의 전력 감소와 낮은 부엽레벨을 갖는 안테나 빔패턴의 적용을 고려하여 분석된 공유조건 결과들의 예들을 제시한다.
KSP Keywords
5 GHz, Ground Station, International telecommunications union radiocommunication(ITU-R)
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