CAJ | 학술논문

随着无线通信技术的快速发展和智能手机的迅速普及，人们对数据传输速率提出了更高的需求。为进一步提高数据传输速率，通过增加基站天线数目构建大规模M IM O系统，是一种高效而相对便捷的方式。大规模M IM O系统能深度发掘空间维的自由度，使得基站能够利用同一时频资源服务于多个用户。本文探讨了大规模MIMO系统的导频污染问题及解决方案、适用于大规模MIMO系统的信道模型以及低复杂度的传输技术与实现方法三项关键技术。与现有MIMO系统相比，大规模MIMO系统能显著提高频谱效率、能量效率和系统的鲁棒性能。作为第五代移动通信（5G ）最具潜力的研究内容之一，大规模M IM O无线通信技术已引起国内外的广泛关注，但相关研究工作尚处在起步阶段，还有大量的技术难点需要进一步突破。
수착무선통신기술적쾌속발전화지능수궤적신속보급，인문대수거전수속솔제출료경고적수구。위진일보제고수거전수속솔，통과증가기참천선수목구건대규모M IM O계통，시일충고효이상대편첩적방식。대규모M IM O계통능심도발굴공간유적자유도，사득기참능구이용동일시빈자원복무우다개용호。본문탐토료대규모MIMO계통적도빈오염문제급해결방안、괄용우대규모MIMO계통적신도모형이급저복잡도적전수기술여실현방법삼항관건기술。여현유MIMO계통상비，대규모MIMO계통능현저제고빈보효솔、능량효솔화계통적로봉성능。작위제오대이동통신（5G ）최구잠력적연구내용지일，대규모M IM O무선통신기술이인기국내외적엄범관주，단상관연구공작상처재기보계단，환유대량적기술난점수요진일보돌파。
With the rapid development of wireless communications and the popularization of smartphones , higher data rate of the service is required .The demand can be efficiently and conveniently satisfied by in‐creasing the number of antennas at base station (BS) ,thus resulting in a massive MIMO system .The massive MIMO system can exploit the spatial degree of freedom ,and therefore BS is enabled to simulta‐neously serve several user equipments (UE) with the same temporal and frequency resource .Three key techniques are presented in the massive MIMO system ,including the pilot contamination issue and the corresponding solutions ,the theoretical and practical channel model that fits for the massive MIMO sys‐tem ,and the low complexity transmission and implement methods .Compared with the existing MIMO system ,the massive M IM O system can distinctively increase the spectral efficiency ,the energy efficien‐cy ,and the system robustness .As one of the most promising topics on the fifth generation (5G) of wire‐less communication systems ,the massive MIMO system has attracted the extensive attention worldwide . Nevertheless ,the research of massive MIMO systems is still at its early stage ,with a lot of technical problems to be solved .