차세대 통신 시스템을 위한 MIMO 기반 기지국 협력 통신 기법
MIMO-Based Base Station Cooperative Transmission for the Next Generation Communication System
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초록
IEEE 802.16m 또는 3GPP-LTE-A 등의 차세대 통신 시스템 표준화에서는 기지국간 간섭 등의 영향으로 발생하 는 성능 저하 문제를 해결하기 위해 MIMO 기법에 기반한 기지국 협력 통신 기법을 주요 연구 주제로 다루고 있다. 본 논문에서는 높은 전송율을 요구하는 차세대 통신 시스템에서의 MIMO 기반 기지국 협력 통신 기법의 필요성 및 그 종류를 고찰하고 이상적인 가정에서의 최적 및 준최적 기법을 살펴보며 실제 시스템에서 가정할 수 있는 환경에 적합 한 새로운 형태의 기지국 협력 통신 기법을 제안한다. 제안하는 MIMO 기반 기지국 협력 통신 기법은 비협력적 기법 에 비해 크지 않은 추가적인 시스템 자원을 이용하면서도 전송율 성능이 개선됨을 보였다.
Abstract
MIMO-based base station(BS) cooperation technique has been an important topic in standard organization such as IEEE 802.16m or 3GPP-LTE-A in order to improve the system performance in the presence of inter-cell interference. This paper studies the necessity and applications of MIMO-based BS cooperation techniques, which consist of the optimal and suboptimal techniques in ideal assumptions. Moreover, we propose two novel BS cooperation schemes suitable for practical system, which show performance improvement by using comparable system resource compared to noncooperative schemes.
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