电讯技术2016，Vol.56Issue(8)：887-893,7.DOI:10.3969/j.issn.1001-893x.2016.08.010
基于总体最小二乘准则的OFDM系统时变信道估计
Time-varying Channel Estimation Based on Total Least Squares Criterion in OFDM Systems
摘要
Abstract
The performance of orthogonal frequency division multiplexing( OFDM) systems depends on the accuracy of channel estimation. In order to improve the estimation accuracy,a time-varying channel estima-tion method applying the total least squares ( TLS ) criterion is proposed. By modeling the time-varying channel for piece-wise linear model,the errors will inevitably bring. A novel method for estimating channel parameters varying within an OFDM symbol is presented. The proposed method takes both channel noise and the error of piece-wise 1inear model into account. The method can better track channel change and e-liminate the error of channel model. Simulation results show that mean squared error( MSE) of the proposed method is between that of least square algorithm and least mean square algorithm,and the new method is more robust with the increasing of the normalized Doppler frequency.关键词
正交频分复用系统/时变信道估计/总体最小二乘/线性模型Key words
orthogonal frequency division multiplexing system/time-varying channel estimation/total least squares/linear model分类
信息技术与安全科学引用本文复制引用
樊同亮,张玉元..基于总体最小二乘准则的OFDM系统时变信道估计[J].电讯技术,2016,56(8):887-893,7.基金项目
浙江省教育厅科研项目(Y201431731) Foundation Item:The Scientific Research Project of Zhejiang Provincial Department of Education(Y201431731) （Y201431731）
