大规模MIMO系统中基于用户位置信息的导频分配

doi:10.11959/j.issn.1000-436x.2017172

通信学报 ›› 2017, Vol. 38 ›› Issue (8): 156-164.doi: 10.11959/j.issn.1000-436x.2017172

大规模MIMO系统中基于用户位置信息的导频分配

杜嘉良,杨霖,宋新雷

电子科技大学通信抗干扰技术国家级重点实验室，四川成都 611731

修回日期:2017-05-09 出版日期:2017-08-01 发布日期:2017-09-07
作者简介:杜嘉良（1993-），男，广东广州人，电子科技大学硕士生，主要研究方向为大规模MIMO系统物理层中的关键技术、导频污染和预编码。|杨霖（1977-），男，四川珙县人，电子科技大学副教授，主要研究方向为无线移动通信、现代通信中的信号处理。|宋新雷（1989-），男，河南商丘人，电子科技大学硕士生，主要研究方向为大规模MIMO导频污染抑制方法。
基金资助:
国家自然科学基金资助项目(61370012);国家自然科学基金资助项目(61571082);国家科技重大专项基金资助项目(2016ZX03001015-004)

Pilot allocation based on user location information in massive MIMO systems

Jia-liang DU,Lin YANG,Xin-lei SONG

National Key Laboratory of Science and Technology on Communications，University Science and Technology of China，Chengdu 611731，China

Revised:2017-05-09 Online:2017-08-01 Published:2017-09-07
Supported by:
The Nationa1 Natura1 Science Foundation of China(61370012);The Nationa1 Natura1 Science Foundation of China(61571082);The Nationa1 Science and Techno1ogy Major Project of the Ministry of Science and Techno1ogy of China(2016ZX03001015-004)

摘要/Abstract

摘要：

针对大规模MIMO系统中的导频污染问题，提出了一种基于用户位置信息的导频分配方案。所提方案根据用户位置在以所在小区基站为极点的极坐标系下的极角大小，对用户进行排序并依次分配导频。方案结合了定向大线的特点，通过把导频的复用距离控制在较远的范围内，从而达到降低导频污染、提高系统可达和速率的目的。仿真结果表明，所提方案不仅能够有效降低用户间的导频污染，还能缩小不同用户间的性能差距，提高系统的公平性。

关键词: 大规模MIMO, 导频污染, 导频分配, 定向大线

Abstract:

In order to so1ve the prob1em of pi1ot contamination in massive MIMO systems，a pi1ot a11ocation scheme based on user 1ocation information was proposed.The proposed scheme arranged the users according to the po1ar ang1e of the user 1ocation in the po1ar coordinate system with the base station of the ce11 as the po1e，and assigned the pi1ots sequentia11y.Combining with the characteristics of directiona1 antenna，the scheme can reduce the pi1ot contamination and improve the achievab1e rate of the system by contro11ing the mu1tip1exing distance of the pi1ot to a far range.Simu1ation resu1ts show that the proposed scheme can not on1y reduce the pi1ot po11ution between users，but a1so reduce the performance gap between different users and improve the fairness of the system.

Key words: massive MIMO, pi1ot contamination, pi1ot a11ocation, directiona1 antenna

中图分类号:

TN929.5

杜嘉良,杨霖,宋新雷. 大规模MIMO系统中基于用户位置信息的导频分配[J]. 通信学报, 2017, 38(8): 156-164.

Jia-liang DU,Lin YANG,Xin-lei SONG. Pilot allocation based on user location information in massive MIMO systems[J]. Journal on Communications, 2017, 38(8): 156-164.

图/表 10

图1

图2

图3

表1

仿真参数"

参数	数值
小区数	L=7
用户数	K=16
导频长度	τ₌₁₆
小区半径/m	R=500
路径损耗指数	K_=3.7
大线数	M=128
信噪比/dB	$\frac{ρ}{σ^{2}} = 10$

表1

表2

表3

图4

图5

图6

图7

参考文献 22

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方案	平均最小值	平均值	方差
随机分配	1.04	1.80	0.21
所提方案	1.68	2.19	0.08
SPA方案	1.37	1.93	0.10

方案	平均最小值	平均值	方差
随机分配	0.25	0.62	0.042
所提方案	0.25	0.62	0.042
SPA方案	0.19	0.46	0.035

大规模MIMO系统中基于用户位置信息的导频分配

Pilot allocation based on user location information in massive MIMO systems

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