Blind Channel Estimation Based on Linear Precoding for OFDM Systems

摘要：

Considering that channel estimation is crucial for coherent detection, a blind channel estimation method based on linear precoding for orthogonal frequency-division multiplexing (OFDM) systems is proposed in this paper. The proposed linear frequency-domain precoder is applied to each pair of blocks before they enter the OFDM system. Due to the introduced structure of precoder, the frequencyselective channel can be identified at the receiver based on cross-correlation operations, singular value decomposition (SVD) and resolving the scalar ambiguity. Because the linear frequency-domain precoder is creatively employed to channel estimation, the proposed blind method is computationally simple and requires no prior statistical information of channel or noise. And the proposed blind method has high spectral efficiency because it exploits no training sequence. Computer simulations have proved that this proposed blind method can identify the frequencyselective channels perfectly and have a good performance.

关键词： OFDM Blind channel estimation Linear Precoding Cross-correlation SVD

作者: Yongming Liang Hanwen Luo Youyun Xu Jianguo Huang

作者单位: Department of Electronic Engineering,Shanghai Jiao Tong University,Shanghai,China College of Marine Engineering,Northwestern Polytechnical University,Xian,China

会议类型: 国际会议

会议名称: 第二届IEEE无线通讯、网络技术暨移动计算国际会议

会议地点: 武汉

会议语种:英文

在线出版日期: 2006-09-01（万方平台首次上网日期，不代表论文的发表时间）