Channel Estimation Method for MIMO-OFDM Systems over Time-Varying Channels

被引：0
|
作者：
Chen He [1 ]
Li Zhao-xun [1 ]
机构：
[1] Natl Digital Switching Syst Engn & Technol Res Ct, Zhengzhou, Peoples R China
来源：
2010 INTERNATIONAL CONFERENCE ON COMMUNICATION AND VEHICULAR TECHNOLOGY (ICCVT 2010), VOL I | 2010年
关键词：
Time-varying channels; MIMO-OFDM; pilot-assisted; channel estimation; linear model;
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：
Conventional time-varying (TV) channel estimation (CE) methods for Multiple-Input-Multiple-Output (MIMO) and Orthogonal frequency division multiplexing (OFDM) systems need optimal evenly spaced pilots to track channel time variations in one symbol period and the inter-carrier interference (ICI) on pilots caused by Doppler spread are regarded as noise. However, for practical MIMO-OFDM systems, the required evenly spaced pilots are unsatisfied and the ICI on pilots increase estimation errors. In this paper, a TV CE method for practical MIMO-OFDM systems is proposed. The time variations of the frequency domain transmission function in one symbol period are approximated by a linear model in time-frequency blocks. Simulation results demonstrated the Mean-Square-Error (MSE) and Bit-Error Rate (BER) performances of the proposed MIMO-OFDM CE method are better than the conventional method over TV channels.
引用
收藏
页码：121 / 124
页数：4
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