Channel Estimation for Amplify and Forward Relay in OFDM System

摘要：

This paper provides three channel estimations including LS (least square) estimation, LMMSE (linear minimum mean square error) estimation and Lr-MMSE (low rank minimum mean square error) estimation utilized to the relay channel to approximate the optimal solution in OFDM system. The simulation results show that LMMSE estimation outperformes the other two estimations, but it is too complicated. The performance of LrMMSE estimation approaches that of the LMMSE estimation, but LrMMSE lessens the number of the multiplications. We also present the approximate average symbol error (ASER) of variable gain relay for the 16QAM modulation and give the tight bounds and the simpler form without integral expression is proposed to simplify the bound expression.

关键词： relay channel LrMMSE channel estimation

作者: Fang Liu Zhe Chen Xin Zhang Dacheng Yang

作者单位: School of Telecommunication Engineering, BUPT Beijing, China

会议类型: 国际会议

会议名称: The 4th International Conference on Wireless Communications, Networking and Mobile Computing(第四届IEEE无线通信、网络技术及移动计算国际会议)

会议地点: 大连

会议语种:英文

页码: 1-4

在线出版日期: 2008-10-12（万方平台首次上网日期，不代表论文的发表时间）