본 논문에서는 단일 주파수 망 (Single Frequency Network: SFN)을 통해 ATSC(Advanced Television Systems Comittee) 지상파 디지털 TV 방송을 서비스하기 위해 필요한 기술적인 요구 사항에 대하여 고찰하고 , 기존 디지털 동일 채널 중계기 (Digital On-Channel Repeater: 가 가지는 단점을 극복한 등화형 동일 채널 중계기 (Equalization Digital On-Chanel Repeater: EDOCR)를 제안한다. EDOCR은 오류정정(Forward Error Corection: FEC) 복호 및 부호화부를 사용하지 않기 때문에 모호성(ambiguity) 문제가 발생하지 않아서 EDOCR의 입력 신호와 출력 신호가 동일하며 , 고성능 등화기를 사용하여 주송신기와 EDOCR 사이의 전송로에 의해 야기된 잡음 및 다중경로 신호를 제거하므로 EDOCR 출력 신호의 품질이 입력 신호 보다 우수하다 . 또한 낮은 안테나 격리도(isolation)로 인해 야기된 궤환 (feedback) 신호를 EDOCR 등화기에서 제거할 수 있기 때문에 송신 출력을 높일 수 있다 .
KSP Keywords
single frequency network(SFN)
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