On the ergodic sum rate for multisource multidestination unmanned aerial vehicle relaying,Transactions on Emerging Telecommunications Technologies

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On the ergodic sum rate for multisource multidestination unmanned aerial vehicle relaying
Transactions on Emerging Telecommunications Technologies ( IF 2.5 ) Pub Date : 2021-05-08 , DOI: 10.1002/ett.4294
Zhenlei Dan ₁ , Min Lin ₁ , Xiaoyu Liu ₁ , Jian Ouyang ₁ , Wei‐Ping Zhu _{1,

2}

Affiliation

Unmanned aerial vehicle (UAV) relay system has received significant attention in future wireless communications. In this article, the ergodic sum rate of a multisource multidestination UAV relaying is investigated. Here, an UAV with multiple antennas is deployed as an aerial relay using threshold-based decode-and-forward protocol to assist signal transmission from multiple sources to their intended destinations simultaneously. By considering the effect of path loss, we first obtain the output signal-to-interference-plus-noise ratio expression for the considered system. Then, we propose a statistical channel state information based beamforming (SCSI-BF) scheme to maximize the system ergodic sum rate, where both of the uplink and downlink channels are subject to correlated Rayleigh fading. Furthermore, we derive the analytical expression for the ergodic sum rate of the considered system with the SCSI-BF scheme. Finally, numerical results are given to demonstrate the superiority of the SCSI-BF scheme and the validity of the theoretical analysis, and show the impact of various parameters on the system performance.

中文翻译：

多源多目的地无人机中继的遍历求和率

无人机（UAV）中继系统在未来的无线通信中受到了极大的关注。本文研究了多源多目的地无人机中继的遍历求和率。在这里，使用基于阈值的解码和转发协议将具有多个天线的无人机部署为空中中继，以帮助信号从多个源同时传输到其预定目的地。通过考虑路径损耗的影响，我们首先获得所考虑系统的输出信干噪比表达式。然后，我们提出了一种基于统计信道状态信息的波束成形 (SCSI-BF) 方案，以最大化系统遍历总速率，其中上行链路和下行链路信道都受到相关瑞利衰落的影响。此外，我们使用 SCSI-BF 方案推导出所考虑系统的遍历总和率的解析表达式。最后，通过数值结果证明了 SCSI-BF 方案的优越性和理论分析的有效性，并展示了各种参数对系统性能的影响。

更新日期：2021-05-08

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