An Enhanced Channel Estimation Method for MU-MIMO based LTE-Advanced System

被引：0
作者：
Hwang, Won Jun [1 ]
Jang, Jun Hee [1 ]
Choi, Hyung Jin [1 ]
机构：
[1] Sungkyunkwan Univ, Sch Informat & Commun Engn, Suwon, South Korea
来源：
17TH ASIA-PACIFIC CONFERENCE ON COMMUNICATIONS (APCC 2011) | 2011年
关键词：
Channel estimation; LTE-Advanced; minimum mean squared error (MMSE); multi-user interference (MUI); multi-user multiple-input multiple-output (MU-MIMO); OFDM SYSTEMS; CAPACITY;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, we propose an enhanced channel estimation method for multi-user multiple-input multiple output (MU-MIMO) based long term evolution (LTE)-Advanced system. In MU-MIMO based LTE-Advanced system, the orthogonality between co-scheduled layers is not perfectly guaranteed. In this case, significant performance degradation in channel estimation can occur due to the interference from transmit signals for co-scheduled users. To overcome this problem, the proposed method partially estimates and eliminates the multi-user interference using a simple pilot matrix inversion based scheme. After the interference mitigation, we apply an iterative two-dimensional minimum mean squared error (2-D MMSE) channel estimation scheme with adaptive noise and interference weighting method to increase the estimation accuracy. Various simulation results verify that the proposed method has superior performance compared with the conventional 2-D MMSE channel estimation scheme, with only a few times of iteration.
引用
收藏
页码：163 / 167
页数：5
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