Channel Estimation and Symbol Detection Using Superimposed Pilot for Rapidly Time-Varying OFDM System

被引：0

作者：

Zhang, Han ^{[1
]}

Dai, Xianhua ^{[1
]}

Wu, Haifeng ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Dept Elect Engn & Commun Engn, Guangzhou 510275, Guangdong, Peoples R China

来源：

2007 INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS, NETWORKING AND MOBILE COMPUTING, VOLS 1-15 | 2007年

关键词：

Channel estimation; superimposed training; rapidly time-varying channel;

D O I：

10.1109/WICOM.2007.26

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

A superimposed-training (ST) based rapidly time-varying frequency selective channel estimation scheme for orthogonal frequency division multiplexing (OFDM) system is investigated. The time-varying coefficients of the rapidly time-varying channel are modeled by exponential basis expansion. Meanwhile, file optimal training sequences are derived with respect to minimizing the mean square error (MSE). Furthermore, an iterative technique for symbol detector is proposed to cancel the effects of the embedded training on symbol recovery. Simulation results confirm the effectiveness of the proposed approach, even for the rapidly time-varying channel with a great Doppler frequency.

引用

页码：77 / 80

页数：4

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