On the energy efficient multiple-pair communication in massive MIMO relay networks

Do Dung Nguyen, Qingchun Chen
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引用次数: 1

Abstract

In this paper, we consider multiple-pair communication in massive MIMO relay network, wherein K single antenna source nodes deliver their messages to the corresponding K single antenna destination nodes with the help of one relay provisioned with N(N >> K) antenna array. And the energy efficient multiple-pair communication in Massive MIMO relay network through the precoding at both sources and relay is addressed. It is shown that, given the channel state information at the source nodes and the relay, the zero-forcing precoding at all source nodes, the zero-forcing reception and zero-forcing transmission (ZFR/ZFT) or the zero-forcing reception and maximum ratio transmission (ZFR/MRT) at relay can be employed to mitigate inter-pair interference. The asymptotical analysis shows that, the required transmit power at relay can be made inversely proportional to the number of relay antennas without sacrificing the achieved energy efficiency. And the optimal power allocation problem is further formulated to address the power allocation design at all source nodes and the relay according to the large-scale fading for a better energy efficiency, when fulfilling some predefined sum rate performance requirements.
大规模MIMO中继网络中节能多对通信的研究
本文考虑大规模MIMO中继网络中的多对通信,其中K个单天线源节点通过配备N(N >> K)个天线阵列的中继将消息传递给相应的K个单天线目的节点。研究了大规模MIMO中继网络中通过源端和中继端的预编码实现高效节能的多对通信。结果表明,在给定源节点和中继的信道状态信息的情况下,在所有源节点采用强制零预编码、强制零接收和强制零发送(ZFR/ZFT)或强制零接收和强制最大比发送(ZFR/MRT)都可以缓解对间干扰。渐近分析表明,在不牺牲能量效率的情况下,中继所需的发射功率可以与中继天线数成反比。在满足预先设定的和速率性能要求的情况下,进一步制定了最优功率分配问题,解决了在所有源节点和中继上根据大规模衰落进行功率分配设计,以获得更好的能源效率。
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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