MM-Based Solution for Partially Connected Hybrid Transceivers with Large Scale Antenna Arrays
MM-Based Solution for Partially Connected Hybrid Transceivers with Large Scale Antenna Arrays
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DOI：
10.1109/globecom38437.2019.9013338
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发表时间：
2019-12
期刊：
影响因子：
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通讯作者：
A. Arora;C. Tsinos;S. M. R. Bhavani;S. Chatzinotas;B. Ottersten
中科院分区：
文献类型：
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作者：
A. Arora;C. Tsinos;S. M. R. Bhavani;S. Chatzinotas;B. Ottersten
在采用大规模天线阵列(LSAA)的毫米波多输入多输出(MIMO)通信系统中，使用混合收发机来降低功耗和硬件成本。在混合模数(A/D)收发机中，前/后处理操作分为低维基带(BB)前置/后置编码器，然后是模拟移相器网络。文献中主要提出了两种混合结构来实现混合收发信机，即全连接和部分连接。与部分连接结构相比，全连接结构的实现具有更高的硬件复杂度、成本和功耗。本文针对单用户点对点毫米波MIMO系统，提出了一种低复杂度的收发信机设计算法。该算法利用变量消去(投影)和最小化-最大化(MM)框架，并保证收敛到一个固定点。仿真结果表明，该算法在LSAA系统中易于扩展，并且与现有的解决方案相比，在系统的频谱效率(SE)方面取得了显著的改善。
In a mmWave multiple-input multiple-output (MIMO) communication system employing a large-scale antenna array (LSAA), the hybrid transceivers are used to reduce the power consumption and the hardware cost. In a hybrid analog-digital (A/D) transceiver, the pre/post-processing operation splits into a lower-dimensional baseband (BB) pre/postcoder, followed by a network of analog phase shifters. Primarily two kinds of hybrid architectures are proposed in the literature to implement hybrid transceivers namely, the fully- connected and the partially-connected. Implementation of fully-connected architecture has higher hardware complexity, cost and power consumption in comparison with partially- connected. In this paper, we focus on partially- connected hybrid architecture and develop a low- complexity algorithm for transceiver design for a single user point-to-point mmWave MIMO system. The proposed algorithm utilizes the variable elimination (projection) and the minorization- maximization (MM) frameworks and has convergence guarantees to a stationary point. Simulation results demonstrate that the proposed algorithm is easily scalable for LSAA systems and achieves significantly improved performance in terms of the spectral efficiency (SE) of the system compared to the state-of-the-art solution.