摘要
文章结合MIMO-OFDM(多输入多输出-正交频分复用)无线通信系统,研究了一种基于变换域插值的二维导频信道估计算法。这种方法利用变换域的低通滤波器来减小ICI和AWGN的影响,并通过高次分解的插值法来实现插值。实验表明,这种基于变换域信道估计插值法比普通的MMSE和LS算法具有更好的性能,使得MIMO-OFDM系统可以在具有时变和频率选择性信道的无线移动通信系统中工作。
This paper makes a research on two-dimensional pilot channel estimation for MIMO-OFDM system based on space transform precipitation. This precipitation method, achieved by upper Factorization, can reduce the influence of the ICI and AWGN using the lowpass of space transform. The simulation results show that this channel estimation method based on space transform has better performance as compared to the ordinary algorithm of MMSE and LS, and makes the MIMO- OFDM system work in the wireless communication system of time-varying and frequency selective channels.
出处
《信息安全与通信保密》
2007年第5期81-83,共3页
Information Security and Communications Privacy
关键词
MIMO—OFDM
信道估计
变换域
multi-input multi-output（MIMO）
channel estimation
space transform
