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摘要:
This paper addresses the performance of fast doubly selective fading channel estimation combined with InterCarrier Interference (ICI) cancellation for Long Term Evolution (LTE) communication platform in the High Speed Railway (HSR) environment. We consider the Channel Impulse Response (CIR) coefficients with a critical Doppler frequency shift and multi-path fading that were taken from the WINNER II channel model and the D2a propagation scenario, where the conditions of HSR are analyzed. As multi-path fading increases and the channel varies in the order of the symbol period, we first propose a novel approach for designing a pilot symbol structure in the time domain. Then, we describe the deployment of the proposed pilot symbol structure to estimate the channel in the time domain. Channel information corresponding to the data positions is obtained by linear interpolation. In each OFDM symbol, the slope and the initial value for establishing an interpolation function are estimated to adapt to the time variation of the channel. An accurate estimate of channel state information is used for the purpose of ICI cancellation. The simulation results show that the channel estimated by our proposed method can follow the real channel well, even in a very high Doppler frequency. The estimation method in terms of Mean Squared Error (MSE) significantly outperforms the state-of-the-art methods. The combination of our channel estimator with several interference cancelers provides a considerably better system performance than that achieved when frequency channel estimation is used.
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篇名 A time-domain estimation method of rapidly time-varying channels for OFDM-based LTE-R systems
来源期刊 数字通信与网络:英文版 学科 工学
关键词 ICI CANCELLATION OFDM CHANNEL estimation LTE-R
年,卷(期) 2019,(2) 所属期刊栏目
研究方向 页码范围 94-101
页数 8页 分类号 TN
字数 语种
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研究主题发展历程
节点文献
ICI
CANCELLATION
OFDM
CHANNEL
estimation
LTE-R
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引文网络交叉学科
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期刊影响力
数字通信与网络:英文版
季刊
2468-5925
50-1212/TN
重庆南岸区崇文路2号重庆邮电大学数字通信
78-45
出版文献量(篇)
11481
总下载数(次)
2
总被引数(次)
0
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