A novel channel estimation scheme for MIMO-OFDM systems with virtual subcarriers

被引：0
|
作者：
Sun, Feifei [1 ,2 ]
Zhang, Jianhua [2 ]
Zhang, Yanyan [2 ]
Huang, Chen [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Key Lab Universal Wireless Commun, Minist Educ, Beijing, Peoples R China
[2] Wireless Technol Innovat Inst, Beijing, Peoples R China
来源：
2008 IEEE 67TH VEHICULAR TECHNOLOGY CONFERENCE-SPRING, VOLS 1-7 | 2008年
关键词：
MIMO; OFDM; channel estimation; virtual subcarriers;
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 orthogonal frequency division multiplexing (OFDM) systems, some subcarriers at the borders of the allocated bandwidth are not used for transmission as virtual subcarriers. Because of these subcarriers, some conventional channel estimators are not applicable, especially for multiple input multiple output (MIMO) systems. In this paper, our analysis on the effect of virtual subcarriers is briefly presented based on discrete Fourier transform (DFT) estimator in the delay domain. Then, a novel channel estimation approach, which can recover the dispersive distortion of estimated channel impulse response (CIR) caused by virtual subcarriers, is proposed for MIMO-OFDM systems. The proposed channel estimation does not need to know the path delay and is insensitive to the delay tap number. And it can easy be realized. The simulations demonstrate the effectiveness of the proposed approach in both narrow hand and wide band mobile wireless channels.
引用
收藏
页码：928 / +
页数：2
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