一种基于Tucker-2模型的双向MIMO中继系统信道估计方法

A TUCKER-2-BASED CHANNEL ESTIMATION METHOD FOR TWO-WAY MIMO RELAYING COMMUNICATION SYSTEMS

为获得更准确的信道状态信息(CSI),针对双向MIMO中继系统,提出一种高准确度的信道估计方法。该方法在发送端与AF中继处分别对所发送的信号进行编码,同时符号矩阵构造为多个Khatri-Rao乘积形式,为系统提供了额外的多样性;在接收端,每个用户对所接收的信号构造Tucker-2模型,并采用非迭代T-KPLS拟合算法对Tucker-2模型进行拟合,进而联合估计出该通信系统中所有CSI。与已有的信道估计方法相比,所提方法无须发送训练序列,具有更高的频谱利用率及信道估计精度。仿真结果验证了所提方法的有效性。

In order to obtain more accurate channel statement information(CSI),this paper proposes a high accuracy channel estimation method for two-way multiple input multiple output(MIMO)relay systems.The proposed method encoded the transmitted signals at both users and the relay respectively.At the same time,the symbol matrix was constructed in multiple Khatri-Rao product forms,providing additional diversity to the system.At the receiving end,each user constructed a Tucker-2 model for the received signal,and used a non-iterative T-KPLS algorithm to fit the Tucker-2 model to jointly estimate all CSIs in the communication system.Compared with the existing channel estimation methods,the proposed method does not need to transmit a pilot sequence,and has higher spectral efficiency and channel estimation accuracy.Simulation results verify the effectiveness of the proposed method.