LTE Advanced中的CoMP SU MIMO技术研究及资源调度设计.doc

  LTE-Advanced 中的 CoMP-SU-MIMO 技术 研究及资源调度设计 金莉，吴晓非** 5 10 15 20 25 30 （北京邮电大学信息与通信工程学院，北京 100876） 摘 要 ： LTE 的 物 理 层 是 基 于 正 交 频 分 复 用 (OFDM) 和 多 输 入 多 输 出 (MIMO) 技 术 。 LTE-Advanced 是 LTE 的进一步演进，LTE-Advanced 中提出了改善小区边缘用户的性能的 要求及相应的技术。CoMP 技术正是 LTE-Advanced 的提高边缘用户频谱效率，扩大网络覆 盖面积的关键技术之一，CoMP 技术有效的抑制了小区间的干扰。文章首先阐述了 CoMP 的 重要性和技术原理；之后在原有 LTE 平台上搭建了 LTE-Advanced 系统级仿真平台，对 SU-MIMO 下的 CoMP 技术进行仿真，并提出了一种新的适用于 CoMP 的调度机制。从仿真 结果可以看到使用了本文提出的调度算法的 CoMP 技术对小区吞吐量和小区边缘用户频谱 效率有很大的提升。 关键词：LTE-Advanced；CoM；SU-MIMO；调度算法；扇区吞吐量；边缘频谱效率 中图分类号：N929.5 Research and Resorce Scheduling Scheme in LTE-Advanced System Jin Li, Wu Xiaofei (Information and Communication Engineering school, Beijing University of Post Telecommunication, Beijing 100876) Abstract: The physical layer of LTE is based on orthogonal frequency division multiplexing (OFDM) and multiple input multiple output (MIMO) technology. LTE-Advanced is a further evolution of LTE, and LTE-Advanced requirements to improve the performance of cell edge users and proposes corresponding technologies.CoMP technology is one of the key technologies in LTE-Advanced system to improve edge user spectral efficiency and expand the network coverage area.And CoMP technology effectively suppress inter-cell interference.Firstly,the importanceof CoMP and technical principles are presented in this paper.Secondly,a LTE-Advanced system-level simulation platform is structed based on the original LTE platform.Finally,a new scheduling algorithm applies to CoMP is proposed and performance analysis is made in the paper.It is concluded that the proposed algorithm for CoMP technology has greatly improved the cell edge user spectral efficiency. Keywords: LTE-Advanced; CoMP; SU-MIMO; Scheduling algorithm; Sector throughput; Edge spectrum efficiency 35 0 引言 随着 3G 产业在全球逐渐步入高潮，LTE 肩负着 3G 向 4G 演进的任务，LTE-Advanced 是在 LTE 的基础上研究新一代移动通信系统(IMT-Advanced)的候选提案[1]。在 2008 年 6 月， 3GPP 完成了 LTE-A 的技术需求报告，提出了 LTE-A 的最小需求：下行峰值速率 1Gbps， 40 上行峰值速率 500Mbps，上下行峰值频谱利用率分别达到 15Mbps/H