大规模MIMO系统中的伪随机码导频设计

doi:10.3969/j.issn.0255-8297.2016.01.001

应用科学学报 ›› 2016, Vol. 34 ›› Issue (1): 1-11.doi: 10.3969/j.issn.0255-8297.2016.01.001

大规模MIMO系统中的伪随机码导频设计

方昕^1,2, 张建锋¹, 曹海燕¹, 应娜¹

1. 杭州电子科技大学通信工程学院, 杭州 310018;
2. 东南大学移动通信国家重点实验室, 南京 211189

收稿日期:2015-04-15 修回日期:2015-06-15 出版日期:2016-01-30 发布日期:2016-01-30
通信作者: 方昕,副教授,研究方向:下一代无线通信物理层算法,E-mail:fatinafang@163.com,feliciafang@hdu.edu.cn E-mail:fatinafang@163.com,feliciafang@hdu.edu.cn
基金资助:
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

Pilot Design Based on Pseudo-random Code in Massive MIMO System

FANG Xin^1,2, ZHANG Jian-feng¹, CAO Hai-yan¹, YING Na¹

1. College of Communications Engineering, Hangzhou Dianzi University, Hangzhou 310018, China;
2. National Mobile Communications Research Laboratory, Southeast University, Nanjing 211189, China

Received:2015-04-15 Revised:2015-06-15 Online:2016-01-30 Published:2016-01-30

摘要/Abstract

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.

关键词: 大规模MIMO, 导频污染, 信道估计, 伪随机码

Abstract: 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.

Key words: massive MIMO, pilot contamination, channel estimation, pseudo-random code

中图分类号:

TN929.533

方昕, 张建锋, 曹海燕, 应娜. 大规模MIMO系统中的伪随机码导频设计[J]. 应用科学学报, 2016, 34(1): 1-11.

FANG Xin, ZHANG Jian-feng, CAO Hai-yan, YING Na. Pilot Design Based on Pseudo-random Code in Massive MIMO System[J]. Journal of Applied Sciences, 2016, 34(1): 1-11.

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大规模MIMO系统中的伪随机码导频设计

Pilot Design Based on Pseudo-random Code in Massive MIMO System

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