Massive Multiuser MIMO in Heterogeneous Cellular Networks With Full Duplex Small Cells
Massive Multiuser MIMO in Heterogeneous Cellular Networks With Full Duplex Small Cells
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DOI：
10.1109/tcomm.2017.2728536
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发表时间：
2017-07
影响因子：
8.3
通讯作者：
Sunila Akbar;Yansha Deng;A. Nallanathan;M. Elkashlan;G. Karagiannidis
中科院分区：
文献类型：
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作者：
Sunila Akbar;Yansha Deng;A. Nallanathan;M. Elkashlan;G. Karagiannidis
全双工（FD）通信已成为增加网络吞吐量的一种有吸引力的解决方案，它允许在同一频谱中进行下行链路（DL）和上行链路（UL）传输。然而，由于DL和UL干扰以及残留环路干扰，在异构蜂窝网络（HCNs）中仅使用FD基站会导致覆盖减少。因此，我们提出采用半双工大规模多用户多输入多输出宏蜂窝基站（mbs）来缓解覆盖减少，采用FD小蜂窝基站（sbs）来提高频谱效率。提出了一种易于处理的系统框架，该框架允许导出DL和UL率覆盖概率以及DL和UL面积谱效率（ase）的精确和渐近表达式。蒙特卡罗仿真验证了分析结果的准确性，结果表明，在mbs处配置大量天线可以提高DL速率覆盖概率，而增加FD sbs会增加DL速率和UL速率覆盖概率。结果还表明，通过调整UL分数功率控制，可以在UL和DL中获得理想的性能。
Full duplex (FD) communication has emerged as an attractive solution for increasing the network throughput, by allowing downlink (DL) and uplink (UL) transmissions in the same spectrum. However, only employing FD base stations in heterogeneous cellular networks (HCNs) cause coverage reduction, due to the DL and UL interferences as well as the residual loop interference. We, therefore, propose HCNs with half duplex massive multiuser multiple-input multiple-output macrocell base stations (MBSs) to relax the coverage reduction, and FD small cell base stations (SBSs) to improve spectrum efficiency. A tractable framework of the proposed system is presented, which allows to derive exact and asymptotic expressions for the DL and the UL rate coverage probabilities, and the DL and the UL area spectral efficiencies (ASEs). Monte Carlo simulations confirm the accuracy of the analytical results, and it is revealed that the equipping massive number of antennas at MBSs enhances the DL rate coverage probability, whereas increasing FD SBSs increases the DL and the UL ASEs. The results also demonstrate that by tuning the UL fractional power control, a desirable performance in both UL and DL can be achieved.