Optimization of energy efficiency for cognitive radio with partial RF energy it harvesting

被引：9
作者：
Guo, Jianxin [1 ]
Hu, Hang [2 ]
Da, Xinyu [2 ]
Liu, Jian [2 ]
Li, Wei [2 ]
机构：
[1] Xijing Univ, Sch Informat Engn, Xian 710123, Shaanxi, Peoples R China
[2] Air Force Engn Univ, Informat & Nav Coll, Xian 710077, Shaanxi, Peoples R China
来源：
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS | 2018年 / 85卷
基金：
美国国家科学基金会;
关键词：
Cognitive radio; Spectrum sensing; Energy harvesting; Spectrum efficiency; Energy efficiency; NETWORKS; THROUGHPUT; TRADEOFF; RELAY;
D O I：
10.1016/j.aeue.2017.12.030
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The cognitive radio (CR) with energy harvesting is a potential technology to improve both the spectrum efficiency (SE) and the energy efficiency (EE). In this letter, we consider that the secondary users can harvest radio frequency (RF) energy from primary signal and its own signal. The goal is to maximize the energy efficiency of the CR system subject to sufficient protection to the primary user and the power constraint. An efficient algorithm is proposed to optimize the sensing time and the power of the secondary transmitter. Simulation results show that the EE is further improved by using the proposed mechanism.
引用
收藏
页码：74 / 77
页数：4
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