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Hybrid Precoders and Combiners for Sub- Connected and Fully Connected Structures

机译:子连接结构和全连接结构的混合预编码器和组合器

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In Massive Multiple-Input Multiple-Output (MIMO) systems, the hybrid beamforming (BF) has been put forward to reduce the high implementation cost and energy consumption resulted from the tremendous requirements of dedicated Radio Frequency (RF) chains. This paper aims at to design hybrid analog and digital precoders (combiners) for sub-connected and fully connected structures. In order to minimize the Euclidean distance between the optimal precoding matrix and products of analog and digital precoding matrices, an alternating optimization algorithm and a method for maximizing signal power are exploited. Then, based on Linear Minimum Mean Square Error (LMMSE) combiner, the same method is introduced to find the hybrid combiner. Simulation results demonstrate the proposed optimization algorithm 1 has a fast convergence rate, and the proposed hybrid BF method for sub-connected structure outperforms the case for fully connected structure.
机译:在大规模多输入多输出(MIMO)系统中,已经提出了混合波束成形(BF),以减少由于专用射频(RF)链的巨大需求而导致的高实现成本和能耗。本文旨在设计用于子连接和完全连接结构的混合模拟和数字预编码器(组合器)。为了最小化最佳预编码矩阵与模拟和数字预编码矩阵的乘积之间的欧几里德距离,采用了交替优化算法和最大化信号功率的方法。然后,基于线性最小均方误差(LMMSE)组合器,引入了相同的方法来找到混合组合器。仿真结果表明,所提出的优化算法1具有较快的收敛速度,并且所提出的用于子连接结构的混合BF方法优于完全连接结构的情况。

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