OFDM放大转发双向中继系统的自适应信道评估方案

为了提高信道频谱效率和放大转发双向中继信道估计的精确度，提出了一种低复杂度的双向中继网络自适应信道估计算法。双向中继网络采用正交频分多路复用技术（Orthogonal Frequency Division Multiplexing，OFDM）调制技术。该算法通过构建阵列块，结合多通道二维递归最小二乘方法来实现自适应滤波器。相比传统二维递归最小二乘方法，该自适应滤波器的计算复杂度更低。研究分析和Matlab仿真结果显示相比传统算法，提出算法的均方误差性能有所改善，具有较高的信道估计精确度。

The adaptive channel evaluation scheme of amplify and forward two way relay system based on OFDM

In order to improve channel spectral efficiency and the accuracy of amplify and forward two way relay channel estimation, a low complexity adaptive channel estimation algorithm is proposed in this paper. Orthogonal Frequency Division Multiplexing (OFDM) modulation technology is used in the two way relay network. This adaptive filter is realized by constructing array block and combining multichannel two dimensional recursive least squares method. Compared with the traditional two dimensional recursive least squares method, this adaptive filter has lower computational complexity. Based on Matlab platform, the simulation results show that the mean square error performance of proposed algorithm gets improved with higher channel estimation accuracy as compared to the traditional algorithms.