ITERATIVE RECEIVER FOR OFDM SYSTEMS BASED ON SEMI-BLIND CHANNEL ESTIMATION  

作　　者：Jing Ya Xu Xiaodong Chen Ming Cheng Shixin 

机构地区：[1]National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China

出　　处：《Journal of Electronics(China)》2007年第2期163-166,共4页电子科学学刊（英文版）

基　　金：Supported by National "863" Project (No.2002AA123031).

摘　　要：In this paper we propose two iterative algorithms of joint channel estimation and symbol detection for Orthogonal Frequency Division Multiplexing (OFDM) systems. In which, superimposed pilot scheme is adopted and an initial Channel State Information (CSI) is obtained by employing a first-order statistic. In each subsequent iteration, we propose two algorithms to update the CSI. The Mean Square Error (MSE) of channel estimation and Bit Error Rate (BER) performance are given and simulation results demonstrate that the iterative algorithm using method B has good perform-ance approaching the ideal condition.In this paper we propose two iterative algorithms of joint channel estimation and symbol detection for Orthogonal Frequency Division Multiplexing （OFDM） systems. In which, superimposed pilot scheme is adopted and an initial Channel State Information （CSI） is obtained by employing a first-order statistic. In each subsequent iteration, we propose two algorithms to update the CSI. The Mean Square Error （MSE） of channel estimation and Bit Error Rate （BER） performance are given and simulation results demonstrate that the iterative algorithm using method B has good performance approaching the ideal condition.

关 键 词：Orthogonal Frequency Division Multiplexing （OFDM） Iterative receiver Channel estimation Maximum A Posteriori （MAP） probability decoder 

分 类 号：TN929.531[电子电信—通信与信息系统]