%0 Journal Article
%T Performance analysis of MIMO in two-tier LTE network<br>LTE双层网中MIMO技术性能分析*
%A ZHANG Liang-liang
%A ZHANG Zu-fan
%A YANG Zheng-yu
%A <br>张亮亮
%A 张祖凡
%A 杨郑玉
%J 计算机应用研究
%D 2011
%I 
%X Femtocell technology becomes an important way of the supplementary coverage of the LTE cellular mobile communication network for its better hotspot coverage, the higher transmission rate and the larger network capacity. However, it also brings about the complicated CCI in the networks at the same time, and this has seriously affected the performance of heterogeneous networks. In this acticle, in order to reduce the CCI and improve the capacity in the LTE hierarchical networks, Eigen Beamforming, Orthogonal Space-time Block Code and Antenna Selection technology are used in the two-tier network, the accurate mathematical expression of the no-coverage Femtocell radius, Femtocell optimal density and macrocell coverage radius are given, and the improved effect of the interference suppression are analyzed. From the simulation, we found that, compared to SISO, it is most beneficial for interference suppression about Eigen Beamforming, and it can greatly improve the network proformance, Antance Selection have a second effect, OSTBC bring the smallest performance gain. However, when we take into account the network gain and the complexity on the whole, the selection diversity is the better choice.
%K eigen beamforming
%K OSTBC
%K selection diversity
%K optimum density
%K interference suppression
%K no-coverage Femtocell radius
%K maximum Macrocell coverage radius<br>Femtocell
%K 本征波束赋形
%K 正交空时编码
%K 选择分集
%K 最优密度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=A9D9BE08CDC44144BE8B5685705D3AED&aid=48236D1304393813712469FEC61FD1C6&yid=9377ED8094509821&vid=D3E34374A0D77D7F&iid=94C357A881DFC066&sid=73DFEE35F698150B&eid=AE1A5CF00DFD739A&journal_id=1001-3695&journal_name=计算机应用研究&referenced_num=0&reference_num=10