Time-varying Channel Estimation for MIMO OFDM Systems

摘要：

In this paper, new training sequences and frame structure are proposed to estimate time-varying channel for MIMO OFDM systems. The training sequences named modulatable orthogonal polyphase sequences have both good autocorrelations and cross-correlations. They are used as guard interval instead of cyclic prefix, which not only improve the transmission efficiency but also make the channel estimator can track time-varying channel. The channel impulse response can be obtained by measuring the correlation between the received training sequence and the locally generated training sequence. The simulation results show that the proposed estimation method has better performance than conventional methods in fast time-varying channel.

关键词： MIMO OFDM channel estimation modulatabale orthogonal polyphase sequence

作者: Lu Zhen Ge JianHua

作者单位: Dept. of Electrical engineering ShangHai JiaoTong University ShangHai,China Dept. of communication engineering Xidian University Xian, China

会议类型: 国际会议

会议名称: 第三届IEEE无线通讯、网络技术暨移动计算国际会议

会议地点: 上海

会议语种:英文

在线出版日期: 2007-09-21（万方平台首次上网日期，不代表论文的发表时间）