大规模MIMO蜂窝网络系统中的导频污染减轻方法

发布时间：2018-10-16 20:06

【摘要】：提出了2个减轻大规模天线蜂窝网络导频污染的方案:利用正交导频把蜂窝系统中的小区划分为两类一维大的天线阵列网络,每一类之内采用相同的导频,两类之间采用正交的导频,再利用导频功率控制方法减轻了导频污染。利用基站间的协调,以所有基站信道估计均方误差的求和最小为目标函数,寻求近似最优的导频序列长度和同导频用户发射导频时隙的分配方案,从而提高了信道估计的性能,提升了整个系统的下行链路可达和速率。
[Abstract]:Two schemes to reduce pilot pollution in large scale antenna cellular networks are proposed. The cells in cellular systems are divided into two types of one dimensional large antenna array networks using orthogonal pilot frequencies, and the same pilot frequencies are used in each class. Orthogonal pilot frequency is used between the two classes, and pilot power control method is used to reduce pilot pollution. By using the coordination between base stations and taking the minimum sum of mean square error of all base station channel estimation as objective function, the approximate optimal pilot sequence length and the allocation scheme of transmitting pilot time slot of the same pilot user are found, which improves the performance of channel estimation. The downlink reachability and speed of the whole system are improved.
【作者单位】：东南大学信息科学与工程学院;南京邮电大学通信与信息工程学院;南京船舶雷达研究所;
【基金】：国家自然科学基金资助项目(60902012,61071113,61201172,61201176) 国家科技重大专项基金资助项目(2011ZX03003-001-02,2011ZX03003-003-03) 教育部博士点新教师基金资助项目(20090092120013,20100092110010) 江苏省自然科学基金资助项目(BK2011598,BK2011019)~~
【分类号】：TN919.3

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