최근 급격한 모바일 방송 시장의 변화로 인해 사용자 들이 다양하고 고화질의 방송 서비스에 대한 요구가 증대되고 있으며, 지상파 DMB 사업자들도 수익구조를 개선하기 위한 노력을 하고 있다. 이러한 요구와 노력에 맞춰 T-DMB와 역호환성을 유지 하면서 기존의 T-DMB와는 달리 계층변조 방식을 적용해 동일 주파수 내에서 채널의 용량을 증대시키는 AT-DMB 방송 기술을 개발 완료 하였다. AT-DMB의 채널 용량의 증대에 따라 서비스 채널을 늘리거나 SVC를 적용해 고화질 서비스 등 적용 가능한 서비스가 늘어남에 따라 사용자와 DMB 사업자들의 요구를 충족 시켜줄 수 있게 되었다. 이에 상용화 서비스에 앞서 실험방송을 위해 AT-DMB 송신 시스템을 구축하였다. 본 논문은 서론에서 AT-DMB의 배경, 본론에서 AT-DMB 송신 시스템에 대한 간략한 설명, 실험방송을 위해 구축된 송신 시스템 설명 및 예비 테스트 결과를 보여주고 결론을 맺는다.
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