Optimization of downtilts adjustment combining joint transmission and 3D beamforming in 3D MIMO

2014 IEEE/CIC International Conference on Communications in China (ICCC) Pub Date : 2014-10-01 DOI:10.1109/ICCCHINA.2014.7008371

Zehua Wei, Ying Wang, Wenxuan Lin

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引用次数: 5

Abstract

This paper mainly proposes a downtilts adjustment scheme combining joint transmission (JT) and 3-dimension (3D) beamforming in 3D multiple-input multiple-output (MIMO) communication systems, under the new typical scenario in the 3rd generation partnership project (3GPP) which is defined as urban macro cell with one high-rise per sector (3D UMa-H). In our proposed scheme, the specific downtilts adjustment for cellcenter users and cell-edge users are realized through dynamic vertical beamforming. Moreover, the cell-center users are served by 3D beamforming, while the cell-edge users are served by JT and 3D beamforming, which facilitate to maximize both cell-center users' and cell-edge users' throughput. To achieve accurate performance evaluation, 3D spatial channel model (3D SCM) and 2-dimension (2D) planar antenna array structure are also considered in our system-level simulation. Simulation results show that our proposed scheme can achieve about 35% gain on cell average spectral efficiency and 42% gain on cell edge user spectral efficiency compared to traditional 2D MIMO without JT.

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三维MIMO中联合传输与三维波束形成相结合的下倾角调整优化

本文主要针对第三代合作伙伴计划(3GPP)中定义为每扇区一高层的城市宏小区(3D UMa-H)的新典型场景，提出了三维多输入多输出(MIMO)通信系统中联合传输(JT)和三维波束形成相结合的下倾角调整方案。在我们提出的方案中，通过动态垂直波束形成来实现蜂窝中心用户和蜂窝边缘用户的特定下倾角调整。此外，蜂窝中心用户采用三维波束成形服务，蜂窝边缘用户采用JT波束成形和三维波束成形服务，有利于最大化蜂窝中心用户和蜂窝边缘用户的吞吐量。为了实现准确的性能评估，我们还在系统级仿真中考虑了三维空间信道模型(3D SCM)和二维平面天线阵列结构。仿真结果表明，与传统2D MIMO相比，该方案的小区平均频谱效率提高了35%，小区边缘用户频谱效率提高了42%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2014 IEEE/CIC International Conference on Communications in China (ICCC)

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