波束赋形
计算机科学
无线
能量收集
最大功率转移定理
频道(广播)
能量(信号处理)
解码方法
电子工程
发射机功率输出
信息传递
计算机网络
电信
功率(物理)
工程类
发射机
数学
量子力学
统计
物理
作者
A. Rajaram,Rabia Khan,Selvakumar Tharranetharan,Dushantha Nalin K. Jayakody,Rui Dinis,Stefan Panic
出处
期刊:Sensors
[MDPI AG]
日期:2019-03-07
卷期号:19 (5): 1169-1169
被引量:23
摘要
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.
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