单用户MIMO系统在LTE项目中的应用研究  

Single-user MIMO Performance in LTE Project

作　　者：林楠 

机构地区：[1]船舶系统工程部,北京100094

出　　处：《科技资讯》2012年第26期24-25,共2页Science & Technology Information

摘　　要：OFDM是一种多载波调制方案,信息在并行信道里通过一系列的子载波传播。主要的优点是增加了抑制频选衰落和窄带干扰的鲁棒性。本文中我们主要介绍单用户MIMO,也就是(SU-MIMO)方案,例如:单天线速率控制(PARC),和预编码MIMO(PREC)。在PARC中,我们主要考虑2×2和4×4两种天线结构;在PREC中,我们考虑4×4这一种单一情况。本文主要是研究下行链路的长期演进(LTE)。结果显示,就平均扇区吞吐量而言,四码流方案要优于双码流方案接近75%～90%,此外四码流方案有着明显的覆盖增益。Orthogonal Frequency-Division Multiplexing is a multi-carrier modulation scheme,where information symbols are transmitted in parallel over the channel by using a set of subcarriers.One of the main advantages is increased robustness against frequency selective fading and narrowband interference.In this paper we study the performance of two dual-codeword Single-User Multiple-Input Multiple-Output（SU-MIMO） schemes,i.e.Per Antenna Rate Control（PARC） and Precoded MIMO（PREC）,in an OFDM deployment.For PARC we consider 2x2 and 4x4 antenna configurations and for Precoded MIMO 4x4 antenna configuration only.Our study is performed with a downlink Long Term Evolution（LTE） system simulator.The results indicate that in terms of average sector throughput the four-stream schemes outperform the dual-stream scheme by approximately 75%～90%.Moreover,the four-stream schemes have significant coverage gain compared to the dual-stream scheme.

关 键 词：正交频分多路复用技术 长期演进 多输入多输出 第三代移动通信合作计划 

分 类 号：TP2[自动化与计算机技术—检测技术与自动化装置]