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논문검색

스마트융합콘텐츠 논문지

e-ISSN : 2951-2514

다중 SWIPT AF 릴레이 시스템 성능 비교 분석 연구
연도 : 2023
vol / no : 2 / 3
저자 : 고균병
page : 11-18

최근 5G이상의 차세대 무선 네트워크에서 에너지 하베스팅 능력을 갖으면서 에너지 효율 혹은 스펙트럼 효율을 높이는 기법에 관한 연구가 진행되고 있다. 적용가능성이 대두되는 기술은 SWIPT 릴레이 기법이다. 본 논문에서는 다중 SWIPT AF 릴레이 시스템에서 소스 노드와 목적 노드 사이에 직접 링크가 있는 경우에 MRC를 적용하여 비트 오류 성능을 비교 분석한다. SWIPT의 경우 릴레이에 전력 분배기를 사용하여 수신된 신호를 정보 전송 부분과 에너지 수확 부분으로 분할된다. 이러한 다중 SWIPT AF 릴레이 시스템의 성능을 다양한 채널 환경에서 모의실험을 통하여 검증한다. 이를 통하여 다중 릴레이 시스템에서 릴레이 배치 정책을 소스 노드와 릴레이 노드의 채널 환경을 강화하는 방향으로 설정함으로써 비트오류 성능을 향상시킬 수 있음을 확인하였다. 


Recently, there has been research on techniques to increase energy efficiency (EE) or spectrum efficiency (SE) while having energy harvesting (EH) capabilities in the next generation wireless network (NGWN) of 5G or higher. A technology that has emerging applicability is the simultaneous wireless information and power transfer (SWIPT) relay technique. In this paper, we compare and analyze bit error performance by applying maximum ratio combining (MRC) when there is a direct link between the source node and destination node in a multi-SWIPT amplify-and-forward (AF) relay system. In the case of SWIPT, a power divider (PS) is used in the relay to split the received signal into an information transmission part and an energy harvesting part. The performance of this multi-SWIPT AF relay system is verified through simulation experiments in various channel environments. Through this, it was confirmed that bit error performance can be improved by setting the relay placement policy in a multi-relay system to strengthen the channel environment of the source-to-relay link.

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