School of Computer Science and Robotics, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia.
Faculty of Science and Technology, New University of Lisbon, Portugal, and Instituto de Telecomunicações, 1049-001 Lisbon, Portugal.
Sensors (Basel). 2019 Mar 7;19(5):1169. doi: 10.3390/s19051169.
In this paper, we present a few novel simultaneous wireless information and power transfer (SWIPT) schemes that can be effectively used in various 5G wireless network implementations. First, we study the possibility of integrating distributed energy beamforming with the data rate fairness beamforming in a cooperative communication system with multiple cooperative relays and multiple destination users communicating simultaneously. We show that the system exploits significant performance gain using such a joint energy and data rate fairness beamforming scheme. Further, we propose an enhanced version of the SWIPT scheme, the energy-efficient modulation-based non-orthogonal multiple access (M-NOMA) SWIPT scheme, and observe its system efficiency in terms of more harvested energy. Finally, we consider an energy-harvesting SWIPT scheme where the channel response is estimated using the energy-harvesting signal as pilots superimposed on the information signal. For such a scheme, we compute the optimum transmit power ratio between the pilot and information signals under varying SNR conditions and improve the accuracy of the decoding process at the reception.
在本文中，我们提出了几种新颖的同时无线信息与功率传输（SWIPT）方案，这些方案可有效地应用于各种 5G 无线网络实现中。首先，我们研究了在具有多个协作中继和多个同时通信的目标用户的协作通信系统中，将分布式能量波束形成与数据速率公平性波束形成集成的可能性。我们表明，该系统利用这种联合能量和数据速率公平性波束形成方案可获得显著的性能增益。此外，我们提出了一种增强型 SWIPT 方案，即基于能量效率的调制的非正交多址接入（M-NOMA）SWIPT 方案，并观察其在更多能量收集方面的系统效率。最后，我们考虑了一种能量收集 SWIPT 方案，其中使用能量收集信号作为信息信号上的导频来估计信道响应。对于这样的方案，我们在不同 SNR 条件下计算了导频和信息信号之间的最佳发射功率比，并提高了接收端的解码过程的准确性。
