| 大规模MIMO系统中动态导频分配 |
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| 引用本文： | 方昕,张建锋,曹海燕,刘超,潘鹏.大规模MIMO系统中动态导频分配[J].电子与信息学报,2016,38(8):1901-1907. |
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| 作者姓名： | 方昕 张建锋 曹海燕 刘超 潘鹏 |
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| 作者单位： | 2.(杭州电子科技大学通信工程学院 杭州 310016) ②(东南大学移动通信国家重点实验室 南京 210024) |
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| 基金项目： | 东南大学移动通信国家重点实验室开放研究基金(2012D18)，国家自然科学基金(61501158)，浙江省教育厅项目(Y201329723)，浙江省固态存储和数据安全关键技术重点科技创新团队项目(2013TD03) |
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| 摘 要： | 针对大规模多输入多输出(MIMO)系统中存在的导频污染问题，该文提出一种动态导频分配方案。所提方案利用目标小区与干扰小区用户之间的信号干扰强度差将干扰小区分为Uin和Uout两类，并对Uin中的用户进行最优导频分配，Uout中的用户进行随机导频分配来提升系统的平均下行可达和速率。同时，在存在额外正交导频组的情况下对所提方案做了进一步优化。仿真结果表明，所提的动态导频分配方案能够有效地提升大规模MIMO系统的性能。
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| 关 键 词： | 大规模多输入多输出 导频污染 导频分配 可达和速率 |
| 收稿时间： | 2015-09-23 |
Dynamic Pilot Allocation in Massive MIMO System |
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| FANG Xin,ZHANG Jianfeng,CAO Haiyan,LIU Chao,PAN Peng.Dynamic Pilot Allocation in Massive MIMO System[J].Journal of Electronics & Information Technology,2016,38(8):1901-1907. |
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| Authors: | FANG Xin ZHANG Jianfeng CAO Haiyan LIU Chao PAN Peng |
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| Affiliation: | 2.(School of Communication Engineering, Hangzhou Dianzi University, Hangzhou 310016, China) |
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| Abstract: | A dynamic pilot allocation scheme is proposed in case of the pilot contamination existing in massive MIMO system. Based on the signal to interference difference between the aim cell user and the interference cell user, the interference cell is divided intoUin and Uout. Specifically, in order to improve the average downlink achievable sum rates, the users in theUin are operated with the optimal pilot allocation, and the users in theUout are operated with the random pilot allocation. Simultaneously, the proposed pilot allocation scheme is further optimized with an extral set of orthogonal pilots. Simulation results show that the proposed dynamic pilot allocation scheme can enhance the downlink performance of the massive MIMO system effectively. |
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