高技术通讯2017，Vol.27Issue(2)：131-139,9.DOI:10.3772/j.issn.1002-0470.2017.02.004
大规模MIMO系统的全导频RZF预编码方法
A full pilot RZF precoding method for massive MIMO systems
摘要
Abstract
The precoding for massive multiple input multiple output (MIMO) systems was studied.To solve the problem that the inter-cell interference and pilot pollution have the great impact on the precoding effectiveness.An improved full pilot regularization zero forcing (RZF) precoding method was proposed.The method assigns the limited orthogonal pilot signal to the inter-cell users to optimize the channel vector in the precoding matrix to obtain the optimized full pilot normalized precoding matrix, and then deduces the new sum rate expression including the pilot pollution function and the users' interference functions.In addition, the method synthetically considers the number of base station antennas, the user number, and the pilot reuse factors, and optimizes their configuration to suppress the inter-cell interference with the less user information and the higher pilot reuse factor, thus the system performance is effectively improved.The experimental results show that the improved RZF precoding method can improve the system capacity.The spectrum efficiency and the sum rate are better than the traditional RZF method in both the cases of the perfect channel state information (CSI) situation and the imperfect CSI situation.关键词
大规模多输入多输出(MIMO)/小区间干扰/导频污染/频谱效率/信道状态信息(CSI)Key words
massive multiple input multiple output (MIMO)/inter-cell interference/pilot pollution/spectrum efficiency/channel state information (CSI)引用本文复制引用
谢斌,刘述睿,谢舒闽..大规模MIMO系统的全导频RZF预编码方法[J].高技术通讯,2017,27(2):131-139,9.基金项目
国家自然科学基金(61363076)和江西省自然科学基金(20142BAB207020)资助项目. （61363076）
