Massive MIMO系统下导频污染的研究分析

Research and analysis about pilot contamination in Massive MIMO systems

Massive MIMO(Multiple-Input-Multiple-Output)技术是在传统MIMO技术的基础之上延伸出来的一项新技术,是未来5G移动通信系统的关键技术之一。它主要是在基站端配备大规模天线阵列代替目前采用的多天线,从而可以有效的提高通信系统的频谱效率和功率效率,并且对整个通信系统的容量有很大的提升,但是随着基站天线数的增加,导频污染问题成为制约大规模MIMO系统性能的主要因素,文章主要分析了导频污染问题产生的原因,并给出了导频污染问题对Massive MIMO系统性能的影响,最后分析了当前解决导频污染问题的相关研究方法。

Massive MIMO(Multiple-Input-Multiple-Output) technology comes from the traditional MIMO technology, and it is a new technology. Massive MIMO is one of the key technologies of the future 5G communication system. It is mainly equipped with multiple antennas array at the base station to replace the current antennas, which can effectively improve the spectrum efficiency and power efficiency of the communication system, and the capacity of the entire communications system has greatly improved. With increase of the base station antenna, pilot contamination becomes a major factor restricting the performance of massive MIMO system, This paper mainly analyzes the reason of pilot contamination and gives the effect for Massive MIMO performance. Finally this paper analyzes the related research methods to solve the problem of pilot contamination.