mmWave Amplify-and-Forward MIMO Relay Networks With Hybrid Precoding/Combining Design
mmWave Amplify-and-Forward MIMO Relay Networks With Hybrid Precoding/Combining Design
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DOI：
10.1109/twc.2019.2953032
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发表时间：
2019-10
影响因子：
10.4
通讯作者：
Lisi Jiang;H. Jafarkhani
中科院分区：
文献类型：
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作者：
Lisi Jiang;H. Jafarkhani
在本文中，我们考虑了毫米波系统中的放大和转发中继网络，并提出了一种混合预编码器/组合器设计方法。纯相位射频预编码/组合矩阵首先设计用于支持多流传输，其中我们为信道的特征模式补偿相位。然后，执行基带预编码器/组合器以实现最大互信息。基于互信息的数据处理不等式，首先联合设计基带源节点和中继节点，使互信息在目标基带接收端之前最大化。基于互信息最大化和加权MMSE的等价性，提出了源节点和中继节点的低复杂度迭代算法。在获得源节点和中继节点的最优预编码器和组合器后，在基带接收端实现MMSE-SIC滤波器，保持互信息不变，从而获得整个中继系统的最优互信息。仿真结果表明，与文献中已有的算法相比，该算法具有较低的复杂度和较好的性能。此外，我们还提出了一种针对不完全信道状态信息的鲁棒联合收发器设计。
In this paper, we consider the amplify-and-forward relay networks in mmWave systems and propose a hybrid precoder/combiner design approach. The phase-only RF precoding/combining matrices are first designed to support multi-stream transmission, where we compensate the phase for the eigenmodes of the channel. Then, the baseband precoders/combiners are performed to achieve the maximum mutual information. Based on the data processing inequality for the mutual information, we first jointly design the baseband source and relay nodes to maximize the mutual information before the destination baseband receiver. The proposed low-complexity iterative algorithm for the source and relay nodes is based on the equivalence between the mutual information maximization and the weighted MMSE. After we obtain the optimal precoder and combiner for the source and relay nodes, we implement the MMSE-SIC filter at the baseband receiver to keep the mutual information unchanged, thus obtaining the optimal mutual information for the whole relay system. Simulation results show that our algorithm achieves better performance with lower complexity compared with other algorithms in the literature. In addition, we also propose a robust joint transceiver design for imperfect channel state information.