Wireless Energy Harvesting in Cognitive Massive MIMO Systems With Underlay Spectrum Sharing

被引：35
|
作者：
Al-Hraishawi, Hayder [1 ]
Baduge, Gayan Amarasuriya Aruma [1 ]
机构：
[1] Southern Illinois Univ, Dept Elect & Comp Engn, Carbondale, IL 62901 USA
来源：
IEEE WIRELESS COMMUNICATIONS LETTERS | 2017年 / 6卷 / 01期
关键词：
Cognitive radio; Energy harvesting; Massive MIMO; INFORMATION;
D O I：
10.1109/LWC.2016.2641962
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
The achievable sum rate of a wireless-powered multi-cell/multi-user cognitive radio massive multiple-input multiple-output system with underlay spectrum sharing is investigated. The secondary user nodes can harvest energy from the primary user transmissions, and then access and utilize the primary network spectrum for information transmission. The signal-to-interference-plus-noise ratio and achievable sum rate are derived for two specific antenna configurations: 1) unlimited base-station antenna arrays and 2) limited base-station antenna arrays. Furthermore, the optimal time-switching factor and the energy-rate trade-off are quantified in closed-form. The asymptotic analysis reveals that the secondary system can be operated by using its maximum harvested energy when the number of primary base-station antennas grows without bound without hindering the primary transmission.
引用
收藏
页码：134 / 137
页数：4
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