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

• Published in: Journal of electronics (China) Vol. 24; no. 2; pp. 163 - 166
• Main Authors: Jing, Ya, Xu, Xiaodong, Chen, Ming, Cheng, Shixin
• Format: Journal Article
• Language: English
• Published: National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China 01.03.2007
• Subjects: MAP译码器; OFDM系统; 半盲信道估计; 正交频分复用; 迭代接收机; Maximum A Posteriori (MAP) probability decoder; Iterative receiver; Channel estimation; Orthogonal Frequency Division Multiplexing (OFDM)
• ISSN: 0217-9822; 1993-0615
• DOI: 10.1007/s11767-005-0154-2

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.