Energy Harvesting-Based D2D Communications in the Presence of Interference and Ambient RF Sources
Energy Harvesting-Based D2D Communications in the Presence of Interference and Ambient RF Sources
复制标题
DOI：
10.1109/access.2017.2681696
复制
发表时间：
2017-01-01
期刊：
影响因子：
3.9
通讯作者：
Hien Quoc Ngo
中科院分区：
文献类型：
--
作者：
Doan, Toan X.;Hoang, Tiep M.;Hien Quoc Ngo
本文考虑了一个采用时间分割协议的设备到设备(D2D)网络，其中D2D发送器(T-x)首先从多天线功率信标(PB)和周围的射频源获取能量，然后使用所获取的能量将数据传输到D2D接收器(R-x)。为了提高能量传输效率，PB配备了多个天线用于能量传输，T-x配备了多个天线用于能量收集。提出了两种波束赋形技术，即基于最佳天线的波束赋形和最优波束赋形矢量。考虑了均匀泊松分布干扰同信道干扰的影响和路径损耗的短距离传播模型，推导了信息传输链路的平均收获能量、功率中断概率和中断概率的解析表达式。结果表明，通过在T-x处部署多个采集能量天线，并在PB处实施最优波束形成向量方案，系统性能得到显著改善。此外，还给出了蒙特卡罗模拟，验证了分析结果的准确性。
This paper considers a device-to-device (D2D) network with time-splitting protocol, where a D2D transmitter (T-x) first harvests energy from a multiple-antenna power beacon (PB) and ambient radio frequency sources, and then uses that harvested energy to transmit data to the D2D receiver (R-x). To improve the energy transfer efficiency, the PB is equipped with multiple antennas for energy transfer, and T-x is equipped with multiple antennas for energy harvesting. Two beamforming techniques, called best antenna-based beamforming and optimal beamforming vector, are proposed to use at the PB. We derive novel analytical expressions for the average harvested energy, power outage probability, and the outage probability of the information transfer link, considering the effect of co-channel interference from homogeneous Poison distributed interferes and the short-range propagation model for the path loss. We show that by deploying multiple harvesting energy antennas at T-x and by implementing optimal beamforming vector scheme at the PB, the system performance improves substantially. Furthermore, Monte-Carlo simulations are provided and verify the accuracy of our analytical results.