支持广义MIMO技术的软分数频率复用方法  

A Fractional Frequency Reuse Scheme Supporting Generalized MIMO Technique

作　　者：许方敏[1] 陶小峰[1] 王莹[1] 张平[1] 

机构地区：[1]泛网无线通信教育部重点实验室(北京邮电大学)

出　　处：《北京邮电大学学报》2008年第2期46-49,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金重大项目(60496312);国家“863计划”项目(2006AA01Z260);教育部新世纪优秀人才支持计划项目(NCET-05-0116)

摘　　要：为了提高小区边缘用户(CEU)性能,提出了一种新型软分数频率复用(SFFR)方法.与以往频率复用方法不同的是,区域和频率的规划使多个小区联合多个CEU形成广义多输入多输出(MIMO)系统,在小区边缘可支持共信道空间分集和空间复用.另一方面,利用SFFR思想的频率规划通过干扰协同,提高了频谱效率和CEU信干比.CEU信干比提高后,与采用空间分集相比,采用空间复用将更有利于提高CEU性能.因此,为了更大程度上优化系统吞吐量,在小区边缘对下行多用户进行广义MIMO的空间复用,而小区中心用户仍然由单个小区为其提供服务.仿真结果表明,这种支持广义MIMO技术的新型SFFR方法显著提高了CEU性能.To improve cell-edge user （CEU） performance, a new soft fractional frequency reuse（SFFR） scheme is introduced. Unlike other frequency reuse schemes, it supports space diversity and space multiplexing because multi-cell and muhi-CEU form a generalized multi-input multi-output （MIMO） system. On the other hand, CEU performance is improved by interference coordination through frequency programming based on SFFR. It provides a better chance to use space multiplexing than space diversity. For getting a further performance, space multiplexing is adopted. In the meantime, cellcenter users are still served by one cell. Simulation results show that the novel fractional frequency reuse scheme can support generalized MIMO technique and improve CEU performance significantly.

关 键 词：第四代移动通信系统 小区边缘用户性能 软分数频率复用 广义多输入多输出 

分 类 号：TN929.53[电子电信—通信与信息系统]