Optimal Training Signals for Joint Estimation of Channel Response and Frequency Offset in Multiuser OFDM

摘要：

In this paper, a new method for pilot-tone design is presented for multiuser orthogonal frequency division multiplexing(OFDM) systems. We first compute the mean square error (MSE) of the ML channel estimate, then we derive optimal pilot sequences and optimal placement of the pilot tones with respect to this MSE. It is shown that the optimal pilot sequences are equipowered and phase shift orthogonal. Through simulations, it is shown that the optimal pilot sequences derived in this paper outperform the random pilot sequences for joint estimation of channel response and frequency offset in multiuser OFDM systems. Simultaneously, by using the modified maximum likelihood (ML) algorithm can reduce the complex of computation. Simulations indicate that this scheme is especially useful for the system has small frequency offset.

作者: Rui KANG HongBo XU Chaoxiong XU Jun WANG

作者单位: Huazhong Normal University, China

会议类型: 国际会议

会议名称: 2nd IEEE Conference on Industrial Electronics and Applications(ICIEA 2007)(第二届IEEE工业电子与应用国际会议)

会议地点: 哈尔滨

会议语种:英文

在线出版日期: 2007-05-23（万方平台首次上网日期，不代表论文的发表时间）