본 논문에서는 국내 전파 환경에서 DTV 서비스를 안전하게 보호하면서 동시에 TV 유휴 대역 기기를 효과적으로 운용하기 위해 은닉 노드에 의한 DTV 신호 감쇄 영향을 살펴본다. 이를 위해, 국내 전파 환경을 지리적 특성에 따라 해안형, 분지형, 도시형 지역으로 분류하고, 각 지역을 지형적 특징에 따라 다시 8개 지형으로 세분화하여 측정 지점을 선정한 후 DTV 신호의 은닉 노드 감쇄 정도를 측정하고 분석한다. 국내 대도시의 경우 빌딩 건물 지역과 주상 복합 지역이 다른 나라에 비해 상대적으로 밀집해 있기 때문에, 국내 DTV 서비스를 안전하게 보호하기 위해서는 은닉 노드 마진을 최소한 38 dB 이상 설정해야 한다.
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