The Journal of the Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회논문지)

The Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회)
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Interference Cancellation On-Channel Regenerative Repeater for the Single Frequency Network of ATSC Terrestrial Broadcasting

ATSC 지상파 방송의 단일주파수 망 구성을 위한 간섭제거 동일 채널 재생 중계기

  • 김용석 (공주대학교 대학원 정보통신공학과) ;
  • 기장근 (공주대학교 전기전자제어공학부) ;
  • 이규대 (공주대학교 정보통신공학부)
  • Received : 2011.09.29
  • Accepted : 2011.12.16
  • Published : 2011.12.31
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Abstract

In this paper we consider technological requirements to broadcast digital television signals using single frequency networks(SFN) in the Advanced Television Systems Committee(ATSC) transmission systems and propose Interference Cancellation Digital On Channel Regenerative Repeater(IC-DOCR) thar overcomes the limitation of EDOCR(Equalization Digital On Channel Repeater) proposed by ETRI. The proposed IC-DOCR maintains the benefits of EDOCR that have good output signal quality removing multi-path, additive white Gaussian noise(AWGN). In additional, since the Interference Cancellation algorithm using the 8-VSB symbol demodulation of received signal removes the Interference of feedback signal, IC-DOCR improve the weakness of EDOCR that have low isolation between receive and transmit antenna so that can overcome the limitation of output signal power. we did analysis and verification of the proposed system performance using computational simulation.

본 논문에서는 단일 주파수 망(Single Frequency Network:SFN)을 통해 ATSC(Advanced Television Systems Committee) 지상파 디지털 TV 방송을 서비스하기 위한 필요한 기술적인 사항에 대해서 고찰하고, ETRI에서 제안한 등화형 동일 채널 중계기(Equalization Digital On Channel Repeater: EDOCR)가 가지는 단점을 극복한 간섭 제거 디지털 동일 재생중계기(Interference Cancellation Digital On Channel Regenerative Repeater: IC-DOCR)을 제안한다. 제안한 IC-DOCR은 EDOCR의 장점인 전송로에 의해 야기된 잡음 및 다중경로 신호를 제거하므로 우수한 송신품질을 유지한다. 또한, EDOCR 단점인 낮은 송수신 안테나의 격리도(isolation)를 확보하기 위해서 수신 신호의 8-VSB 복조를 이용한 간섭제거 알고리즘을 사용하여 송신 출력의 제한을 극복할 수 있다. 전산 실험을 통해서 제안된 시스템의 성능을 분석하고 확인하였다.

Keywords

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