ATSC (Advanced Television Systems Committee) 지상파 DTV 시스템에서 단일 주파수 망 (Single Frequency Network) 구성 시 동일한 주파수 대역을 사용하는 다수의 송신기와 중계기들로 인하여 수신기에서는 필연적으로 간섭이 발생하게 된다. 이러한 간섭 문제를 해결하기 위하여 ATSC recommended practice (RP) A/111에서는 Kasami 수열로 구성된 송신 식별 (Transmitter Identification, TxID) 신호를 각 송신기 및 중계기에 할당하고 이를 송신 신호에 부가하여 전송한다. 본 논문에서는 TxID 신호로 제안된 Kasami 수열의 극성 및 위상을 조절하여 부가데이터를 전송하는 기법을 제안한다. 제안하는 기법에서 Kasami 수열은 송신기 및 중계기를 식별하기위한 TxID 신호로서의 기능을 수행할 뿐만 아니라 추가적으로 부가데이터를 전송할 수 있는 장점이 있다.
KSP Keywords
Advanced television systems committee(ATSC), Transmitter Identification, single frequency network(SFN)
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