ATSC 방식의 지상파 디지털 TV 방송에서는 단일 주파수 망 구성 시 송신기들과 중계기들이 동일한 주파수를 사용함에 따라 수신기에서 간섭 문제가 발생한다. 이를 해결하기 위하여 ATSC 에서는 각 송신기 및 중계기에 송신기 식별 (TxID: Transmitter Identification) 신호를 할당하여 송신 및 중계 신호에 부가하여 전송하도록 권고하고 있다. 본 논문에서는 기존 DTV 신호에 부가되어 전송되는 TxID 신호가 기존의 상용 수신기에 미치는 영향을 전산실험, 실험실 테스트, 그리고 필드 테스트를 통해 살펴본다. 이러한 테스트 결과에 의하면 TxID 신호가 기존 DTV 신호보다 30 dB 이하의 삽입레벨로 부가하여 전송될 때 상용 DTV 수신기의 TOV (Threshold of Visibility) 의 증가량은 0.17 dB 보다 작았다. 이것은 TxID 신호를 30 dB이하로 부가하여 전송하면 기존의 상용 수신기에 미치는 영향이 거의 없음을 의미한다.
KSP Keywords
Transmitter Identification
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