An Enhanced Threshold-based Feedback Scheme for Massive MU-MIMO Downlink FDD Systems

被引：0

作者：

Kim, Jinsoon ^{[1
]}

Shin, Wonjae ^{[1
]}

Han, Yonghee ^{[1
]}

Lee, Jungwoo ^{[1
]}

机构：

[1] Seoul Natl Univ, Dept Elect & Comp Engn, Seoul 151, South Korea

来源：

2015 49TH ASILOMAR CONFERENCE ON SIGNALS, SYSTEMS AND COMPUTERS | 2015年

关键词：

User selection; !text type='JS']JS[!/text]DM; inter-group interference; threshold-based feedback;

D O I：

暂无

中图分类号：

TP31 [计算机软件];

学科分类号：

081202 ; 0835 ;

摘要：

In this paper, we propose an enhanced threshold-based feedback strategy for massive multiuser multiple-input multiple-output (MU-MIMO) downlink systems adopting two-stage beamforming. The key idea lies in checking the degree of alignment with fixed beamforming vectors at user terminal (UT) by utilizing the effective channel and average inter-group interference-plus-noise power (IGINP). Subsequently, the UT determines whether UT feeds back the channel quality indicator (CQI) pair to base station (BS) or not, thereby reducing the amount of feedback overhead. Numerical results show that the proposed scheme effectively reduces the number of feedback users while the sum rate is maintained compared to conventional feedback strategy.

引用

页码：709 / 713

页数：5

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