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大规模MIMO系统中的伪随机码导频设计 被引量：1

Pilot Design Based on Pseudo-random Code in Massive MIMO System
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摘要 针对大规模MIMO系统中存在的导频污染问题,提出一种有效的导频设计方案.在所有小区复用同一组正交导频的情况下,为每个小区分配不同时延的伪随机码,利用各小区内的伪随机码对小区内用户导频进行同步加扰,以获得用户的发送导频.推导并分析了该导频设计方案下期望信道估计的均方误差.理论和仿真结果表明,该导频设计方案能有效提高信道估计性能,提升整个系统下行链路的性能. To deal with pilot contamination in massive MIMO systems, an efficient pilot design scheme is proposed. Different pseudo-random codes are assigned to different cells, all using the same set of orthogonal pilots. These codes are used to scramble the user pilot in each cell to get a transmission pilot. Mean square error （MSE） performance of expected channel estimation is derived and analyzed. Simulation results show that the channel estimation performance can be effectively improved when a proper pseudo-random code is chosen with the proposed pilot design method. It can greatly enhance the downlink performance in all cells.
作者 方昕 张建锋 曹海燕 应娜
机构地区 杭州电子科技大学通信工程学院 东南大学移动通信国家重点实验室
出处 《应用科学学报》 CAS CSCD 北大核心 2016年第1期1-11,共11页 Journal of Applied Sciences
基金 浙江省自然科学基金(No.LY12F01009) 浙江省教育厅科研项目基金(No.Y201329723) 东南大学国家重点实验室开放课题基金(No.2012D18)资助
关键词 大规模MIMO 导频污染 信道估计 伪随机码 massive MIMO, pilot contamination, channel estimation, pseudo-random code
分类号 TN929.533 [电子电信—通信与信息系统]
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参考文献18

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二级参考文献33

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