空间相关信道下大规模MIMO两跳系统性能分析  

Performance Analysis for Massive MIMO Dual-hop Systems over Spatially Correlated Channels

作　　者：王毅[1,2] 王雨晗 王玉红 WANG Yi;WANG Yuhan;WANG Yuhong(School of Intelligent Engineering,Zhengzhou University of Aeronautics,Zhengzhou 450046,China;China National Digital Switching System Engineering & Technological R&D Center,Zhengzhou 450002,China;International Education College,Henan University,Kaifeng 475001,China;Information Assurance Department,PLA Army Academy of Artillery and air defense Zhengzhou Campus,Zhengzhou 450052,China)

机构地区：[1]郑州航空工业管理学院智能工程学院,河南郑州450046 [2]国家数字交换系统工程技术研究中心,河南郑州450002 [3]河南大学国际教育学院,河南开封475001 [4]陆军炮兵防空兵学院郑州校区信息保障系,河南郑州450052

出　　处：《无线电通信技术》2019年第3期280-285,共6页Radio Communications Technology

基　　金：国家自然科学基金项目(61801435);中国博士后科学基金项目(2018M633733);河南省科技攻关计划项目(182102210449;192102210246);河南省高等学校重点科研项目(19A510024)

摘　　要：针对多对用户大规模MIMO两跳中继系统,考虑空间相关信道,在迫零(Zero-Forcing,ZF)准则下进行中继转发传输,利用确定性等价原理,推导得出遍历可达速率解析表达式,定量给出遍历速率与信道空间相关阵及系统参数间数学关系。基于此,分析了信道空间相关性对遍历速率的影响,并在发射功率缩放率模型下,分析了信源和中继发射功率随天线数增长时可获得的缩放增益。分析发现,中继节点天线阵列引起的信道空间相关性对遍历速率的渐进极限性能无任何影响,且不会影响发射功率缩放率,大大放宽了在中继节点部署大规模天线阵列时的天线间隔要求,有益于大规模天线阵列在中继节点部署实现。利用Matlab仿真验证了遍历速率解析表达式的有效性以及理论分析结果的正确性。This paper investigated a massive multiple-input multiple-output (MIMO) dual-hop system with multi-pair users over spatially correlated channels,in which a closed-form expression of the ergodic achievable rate was derived by using the deterministic equivalent principles when the zero-forcing criterion based relaying retransmission stratagem was adopted.The analytical expression showed the quantitative relations between the achievable rate and the channel correlation matrices as well as the other system parameters.Based on this,the effects of the channel spatial correlations on the system ergodic rate were analyzed.Furthermore,with a power scaling model,the available power scaling laws for the source user transmit power and the relay transmit power with respect to the number of relay antennas were deduced.Through our analysis,it was found the channel correlations caused by the antenna array at the relay transceiver had no impact on the asymptotic limit performance of the ergodic rate as well as the available power scaling laws,which significantly relaxed the requirement of antenna spacing at the relay and facilitated the implementation of massive antenna arrays at the relay.Finally,Matlab simulations are provided to verify the effectiveness of our proposed analytical expression of ergodic rate and validate all the derived conclusions in the manuscript.

关 键 词：大规模MIMO 两跳 遍历速率 空间相关信道 迫零 

分 类 号：TN92[电子电信—通信与信息系统]