东南大学学报（英文版）2005，Vol.21Issue(2)：127-131,5.
SFBC-OFDM系统中基于自适应训练机制的迭代接收机
Iterative receivers for SFBC-OFDM systems with adaptive training scheme
摘要
Abstract
This paper considers the design of iterative receivers for space-frequency block-coded orthogonal frequency division multiplexing (SFBC-OFDM) systems in unknown wireless dispersive fading channels.An iterative joint channel estimation and symbol detection algorithm is derived.In the algorithm,the channel estimator performs alternately in two modes.During the training mode,the channel state information (CSI) is obtained by a discrete-Fourier-transform-based channel estimator and the noise variance and covariance matrix of the channel response is estimated by the proposed method.In the data transmission mode,the CSI and transmitted data is obtained iteratively.In order to suppress the error propagation caused by a random error in identifying symbols,a simple error propagation detection criterion is proposed and an adaptive training scheme is applied to suppress the error propagation.Both theoretical analysis and simulation results show that this algorithm gives better bit-error-rate performance and saves the overhead of OFDM systems.关键词
SFBC-OFDM/迭代接收机/信道估计/自适应训练机制Key words
space-frequency block-coded orthogonal frequency division multiplexing (SFBC-OFDM)/iterative receiver/channel estimation/adaptive training scheme分类
信息技术与安全科学引用本文复制引用
井雅,徐晓东,陈明,程时昕..SFBC-OFDM系统中基于自适应训练机制的迭代接收机[J].东南大学学报（英文版）,2005,21(2):127-131,5.基金项目
The National High Technology Research and Development Program of China (863 Program) (No.2002AA123031). （863 Program）
