通信学报2020，Vol.41Issue(4)：197-205,9.DOI:10.11959/j.issn.1000−436x.2020073
大规模MIMO系统中基于谱分离的导频去污染
Pilot decontamination based on spectrum separation in massive MIMO system
摘要
Abstract
In order to overcome uplink pilot contamination, the technical bottleneck of massive MIIVIO, and different from the existing parallel parameter design strategy for blind pilot decontamination, a hierarchical parameter design method was proposed, which points out that different system parameters have different effects on the exact spectrum separation of the sample covariance matrix of the received signal. In other words, different parameters have different priority. Next, it was found that to achieve spectral separation, the power of the desired signal didn't have to be higher than the interference, and the difference between the two was more important. Furthermore, in a more practical scenario where the pilot sequence length was less than the number of base station receiving antennas, a numerical algorithm was given for the first time to achieve the above-mentioned exact spectral separation. Since the hierarchical parament design ensures the exact separation of the asymptotic spectrum, the results show that the proposed scheme is more suitable for practical applications than the existing blind pilot decontamination.关键词
大规模多输入多输出/导频污染/信道估计/谱分离Key words
massive MIMO/pilot contamination/channel estimation/spectrum separation分类
信息技术与安全科学引用本文复制引用
王海荣1,董健2,王玉辉3..大规模MIMO系统中基于谱分离的导频去污染[J].通信学报,2020,41(4):197-205,9.基金项目
国家自然科学基金资助项目(No.61671251, No.61404130218),射频集成与微组装技术国家地方联合工程实验室开放基金资助项目 (No.KFJJ20170304),南京邮电大学科研基金资助项目(No.NY218009) （No.61671251, No.61404130218）
