Optimal Power Allocation to Increase Secure Energy Efficiency in A Two-Way Relay Network

被引：0
|
作者：
Yao, Rugui [1 ]
Mekkawy, Tamer [1 ]
Xu, Fei [1 ]
机构：
[1] Northwestern Polytech Univ, Sch Elect & Informat, Xian, Shaanxi, Peoples R China
来源：
2017 IEEE 86TH VEHICULAR TECHNOLOGY CONFERENCE (VTC-FALL) | 2017年
基金：
中国国家自然科学基金;
关键词：
Secure energy efficiency; two-way relay network; untrusted relay; optimal power allocation; PHYSICAL LAYER SECURITY; UNTRUSTED RELAY; TRANSMISSION; OPTIMIZATION; COOPERATION; PRECODER; SECRECY; DESIGN;
D O I：
暂无
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：
In this paper, a cooperative secure transmission in a two-way relay network is investigated. Due to untrusted relay, physical layer security is adopted to secure the user's messages from relay interruption. Considering the secure sum rate and power consumption for the network, we formulate an optimal power allocation (OPA) problem for the transmission to maximize the secure energy efficiency (EE). To lower the complexity of the optimization solution, an approximation based on Taylor expansion is introduced to achieve near optimal secure EE with acceptable errors. Finally, the numerical results are presented to validate the correctness and efficiency of the proposed algorithm and solution. The relative error of secure EE is not greater than 6% in the worst case, and about 1% in most cases, which is acceptable.
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页数：5
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