위성시스템에서 제공하는 넓은 서비스 영역이 타 무선망, 특히 지상망의 서비스 영역과 겹치는 경우가 많이 발생하므로 위성시스템에서 타 무선망과의 주파수 공유는 매우 중요하다. 본 논문에서는 지상망과의 간섭을 경감하기 위한 대역 분할 방법을 제안한다. 본 제안 기법에서 다중빔을 이용하는 위성시스템에서 각 위성 빔은 주파수 재사용 기법을 사용하며, 지상 무선국은 인접 위성빔의 주파수 대역을 활용함으로써 간섭량을 효과적으로 경감시킬 수 있다. 본 논문의 실험 결과에 따르면 기존 방식에서 링크 가용도가 90%일 때 간섭량이 -117 dBW이나, 제안된 방법을 적용할 때 주파수 재사용률에 따라 간섭량을 -168 dBW 또는 -163 dBW으로 경감시킬 수 있었다.
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