최근 무선 시스템 수요가 증가함에 따라 주파수 이용
효율을 증가시키기 위한 연구로 인지무선방식에 대한
연구가 활발히 진행되고 있다. 특히 인지무선방식 중
underlay 방식은 secondary user (SU)의 신호가
primary user (PU)에게 미치는 간섭 전력을 저감시키
는 것이 중요한 문제이다.
또한 고속이동 환경에서는 도플러 확산으로 인해 간
섭 성분이 더욱 증가하는 문제가 발생한다. 이러한 한
계를 극복하기 위해, 본 논문에서는 고속 이동 환경에
서 강인한 OTFS 신호을 활용한 underlay 구조와 SU
수신기에서 PU 간섭저감을 위한 시간영역 및 주파수-
시간영역에서의 등화방식을 제안한다
KSP Keywords
Secondary user(Su), primary users(PUs)
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