An Improved Adaptive Channel Estimation Method for Multiuser Multiantenna OFDM Systems

摘要：

An improved normalized least-mean squares (NLMS) channel estimation method using a time-varying convergence factor is proposed for multiuser and multiantenna systems. The new method does not need to estimate the scalar ambiguity matrix, and is guaranteed to be convergent to the Wiener solution in the mean square sense. Comparing with the basic NLMS algorithm, the improved method has a faster convergence speed with a slightly higher computational complexity only. Computer simulations show that the improved method also has a good performance in tracking the channel responses.

关键词： Multiuser and multiantenna Adaptive algorithms Normalized least-mean-square algorithm Convergence speed Computational complexity

作者: Yue-Xing Gao Jie Yang Qing-Min Meng Wei-Ping Zhu

作者单位: Institute of Signal Processing and Transmission Nanjing University of Posts and Telecommunications N Institute of Signal Processing and TransmissionNanjing University of Posts and TelecommunicationsNan Institute of Signal Processing and TransmissionNanjing University of Posts and TelecommunicationsNan

会议类型: 国际会议

会议名称: 2011年无线通信与信号处理国际会议(WCSP 2011)

会议地点: 南京

会议语种:英文

页码: 1-5

在线出版日期: 2011-11-09（万方平台首次上网日期，不代表论文的发表时间）