单用户毫米波大规模MIMO系统的混合预编码方案设计

发布时间：2018-02-20 18:21

本文关键词： 毫米波大规模MIMO 混合预编码器混合合成器频谱效率　出处：《高技术通讯》2017年05期 　论文类型：期刊论文

【摘要】：对MIMO通信系统的数字预编码方法进行了深入分析,指出单用户毫米波大规模MIMO系统和传统全数字预编码方案所用射频(RF)链路数量过大致使系统实现成本大和能量消耗较高,并针对这种情况,提出了一种在系统收发两端分别采用混合预编码器和混合合成器的混合预编码方案。该方案首先通过迭代算法设计模拟预编码矩阵,并且根据信道矩阵与模拟预编码矩阵作用生成的等效信道矩阵设计数字预编码矩阵,然后根据混合预编码器设计混合合成器,从而使系统频谱效率最大化。该方案与传统全数字预编码及现有混合预编码方案的仿真比较结果表明,该方案有效降低了系统实现成本和能量消耗,且性能优于现有的混合预编码方案,与传统全数字预编码方案相比,性能非常接近。
[Abstract]:The digital precoding method of MIMO communication system is analyzed in depth. It is pointed out that the large number of RF links used in mono-user millimeter-wave large-scale MIMO system and traditional full-digital precoding scheme leads to the high cost and high energy consumption of the system. In order to solve this problem, a hybrid precoding scheme using hybrid precoder and hybrid synthesizer at both ends of the system is proposed. Firstly, the iterative algorithm is used to design the analog precoding matrix. The digital precoding matrix is designed according to the equivalent channel matrix generated by the interaction of the channel matrix and the analog precoding matrix, and then the hybrid synthesizer is designed according to the hybrid precoder. Compared with the traditional full-digital precoding scheme and the existing hybrid precoding scheme, the simulation results show that the proposed scheme can effectively reduce the cost and energy consumption of the system. The performance is better than the existing hybrid precoding scheme, and the performance is very close to that of the traditional full-digital precoding scheme.
【作者单位】：江西理工大学信息工程学院;
【基金】：国家自然科学基金(61363076) 江西省自然科学基金(20142BAB207020)资助项目
【分类号】：TN919.3

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