Smart Pilot Assignment for Massive MIMO

被引：154

作者：

Zhu, Xudong ^{[1
]}

Wang, Zhaocheng ^{[1
]}

Dai, Linglong ^{[1
]}

Qian, Chen ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Elect Engn, Tsinghua Natl Lab Informat Sci & Technol TNList, Beijing 100084, Peoples R China

来源：

IEEE COMMUNICATIONS LETTERS | 2015年 / 19卷 / 09期

基金：

北京市自然科学基金; 国家高技术研究发展计划(863计划);

关键词：

Massive MIMO; pilot contamination; inter-cell interference; pilot assignment; channel quality;

D O I：

10.1109/LCOMM.2015.2409176

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

A massive multiple-input multiple-output (MIMO) system, which utilizes a large number of antennas at the base station (BS) to serve multiple users, suffers from pilot contamination due to inter-cell interference. A smart pilot assignment (SPA) scheme is proposed in this letter to improve the performance of users with severe pilot contamination. Specifically, by exploiting the large-scale characteristics of fading channels, the BS first measures the inter-cell interference of each pilot sequence caused by the users with the same pilot sequence in other adjacent cells. Then, in contrast to the conventional schemes which assign the pilot sequences to the users randomly, the proposed SPA method assigns the pilot sequence with the smallest inter-cell interference to the user having the worst channel quality in a sequential way to improve its performance. Simulation results verify the performance gain of the proposed scheme in typical massive MIMO systems.

引用

页码：1644 / 1647

页数：4

共 6 条

[1]

Ashikhmin A., 2012, Proceedings of the 2012 IEEE International Symposium on Information Theory - ISIT, P1137, DOI 10.1109/ISIT.2012.6283031

[2] Inter-Cell Interference in Noncooperative TDD Large Scale Antenna Systems [J].