基于rank自适应的3D MIMO有限反馈传输方案  

Limited feedback schemes based rank adaptation for 3D MIMO

作　　者：胡正[1] 康绍莉[2] 苏昕[2] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191 [2]电信科学技术研究院无线移动通信国家重点实验室,北京100191

出　　处：《系统工程与电子技术》2015年第11期2611-2616,共6页Systems Engineering and Electronics

基　　金：国家高技术研究发展计划(863计划)(2014AA01A705)资助课题

摘　　要：大规模多输入多输出(multiple-input multiple-output,MIMO)技术能够提高频谱效率和能量效率,被认为是下一代无线通信的关键技术。随着有源天线技术的发展,基站配置二维天线阵列可在三维(threedimensional,3D)空间控制波束,这使得3D MIMO技术成为一个新的研究热点。在单用户MIMO下,本文提出了两种基于秩(rank)自适应的3D MIMO有限反馈方案。方案I在水平维采用rank自适应,垂直维支持rank 1传输;方案II在垂直维采用rank自适应,水平维支持rank 1传输。在三维城市宏小区和三维城市微小区场景下,采用系统级仿真验证了两种方案的性能。相较于水平维和垂直维都仅支持rank 1的传输方案,两种方案都取得了性能增益,同时方案I优于方案II。Massive multiple-input multiple-output （MIMO） is a potential technology to improve spectrum efficiency and energy efficiency, and deemed to be a key technology for the next generation of wireless communi- cation. As the active antenna system （AAS） technology develops, the base station equipped with two-dimen- sional （2D） antenna array can control the beams in the three-dimensional （3D） space,which makes 3D MIMO become a research hotspot. In the downlink single-user MIMO （SU-MIMO） system, two limited feedback schemes based on rank adaptation for 3D MIMO are proposed. Scheme I adopts rank adaptation in the horizontal domain and supports rank 1 in the vertical domain. On the contrary, scheme If adopts rank adaptation in the vertical domain and supports rank 1 in the horizontal domain. System-level simulations are conducted to test the performance of the two schemes under the 3D-urban macro （3I）-UMa） and 3D-urban micro （3D-UMi） scenari- os. Simulation results reveal that, compared with the scheme which only supports rank 1 in both horizontal and vertical domains, the two schemes achieve performance gain. Also, scheme I outperforms scheme Ⅱ.

关 键 词：三维多输入多输出 秩自适应 有限反馈 三维城市宏小区 三维城市微小区 

分 类 号：TN911[电子电信—通信与信息系统]