文献类型：期刊文献

英文题名：A novel pilot decontamination scheme for uplink massive MIMO systems

作者：Yuan, Weina[1]; Yang, Xinkai[1]; Xu, Rui[1]

机构：[1] School of Information Science and Engineering, East China University of Science and Technology, Shanghai, China

年份：2018

卷号：131

起止页码：72

外文期刊名：Procedia Computer Science

收录：EI(收录号：20190706494055)

语种：英文

外文关键词：Contamination - Cytology - Graphic methods - 5G mobile communication systems - Decontamination - MIMO systems

摘要：The pilot contamination causing by the reuse in adjacent cells in massive MIMO for 5G is an important issue to deal with. In our paper, a novel pilot decontamination scheme based on two existing schemes (soft pilot reuse and weighted-graphed-coloring-based pilot decontamination) is proposed. All users are firstly separated into two categories: cell centered users that reuse the same pilot sequences and cell edged users that use other orthogonal pilot subgroups to get rid of the severe contamination. But the slight contamination among the cell centered users still exists. Then, in order to improve the decontamination of cell centered users, a weighted-graph-based method is applied. With such combination, the proposed scheme is able to mitigate the contamination and improve the quality of communication significantly, which is verified by simulation results. ? 2018 The Authors. Published by Elsevier Ltd.