高技术通讯2012，Vol.22Issue(4)：363-367,5.DOI:10.3772/j.issn.1002-0470.2012.04.005
时变信道OFDM系统联合迭代信道估计与符号检测算法
A joint iterative channel estimation and symbol detection algorithm for OFDM systems over time-varying channels
摘要
Abstract
Based on the basic expansion model (BEM), a novel joint iterative channel estimation and symbol detection algorithm for orthogonal frequency division multiplexing (OFDM) systems over time-varying channels is proposed for elimination of inter-carrier interference (ICI) caused by rapidly time-varying channels. The algorithm combines the BEM based minimum mean square error (MMSE) channel estimation with a symbol detection method like the successive interference cancellation, and uses interpolation and filtering to further eliminate noise, and then obtains the more accurate symbol detection result through joint iterative calculation. Meanwhile, the algorithm obtains the tradeoff between complexity and performance by using the banded matrix approximation. The theoretical analysis and the simulation results show that the novel joint iterative channel estimation and symbol detection algorithm can effectively improve the system performance over fast time-varying channels.关键词
正交频分复用(OFDM)/基扩展模型(BEM)/串行干扰抵消(SIC)/迭代信道估计/快时变信道Key words
orthogonal frequency division multiplexing (OFDM)/ basic expansion model (BEM)/ successive interference cancellation (SIC)/ iterative channel estimation/ fast time-varying channels引用本文复制引用
韩华,吴乐南..时变信道OFDM系统联合迭代信道估计与符号检测算法[J].高技术通讯,2012,22(4):363-367,5.基金项目
国家自然科学基金(60872075)资助项目. （60872075）
