智能反射表面辅助无线能量传输的保密率最大化算法

张祖凡; 张迪

doi:10.11999/JEIT211255

智能反射表面辅助无线能量传输的保密率最大化算法

doi: 10.11999/JEIT211255

张祖凡,
张迪^,

重庆邮电大学通信与信息工程学院重庆 400065

基金项目: 重庆市教育委员会科学技术研究计划重大项目(KJZD-M201900601)

详细信息

作者简介:
张祖凡：男，1972年生，教授，研究方向为无线通信、移动社交网络、机器学习等

张迪：女，1997年生，硕士生，研究方向为无线通信、智能反射表面等

通讯作者:
张迪　S190131216@stu.cqupt.edu.cn

中图分类号: TN918
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- 被引次数: 0
出版历程
- 收稿日期: 2021-11-11
- 修回日期: 2022-05-23
- 网络出版日期: 2022-05-31
- 刊出日期: 2022-07-25

Secrecy Rate Maximization Algorithm for Intelligent Reflecting Surface Assisted Wireless Energy Transmission

ZHANG Zufan,
ZHANG Di^,

School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Funds: The Major Project of Science and Technology Research Program of Chongqing Education Commission of China (KJZD-M201900601)

摘要

摘要: 为了减少窃听者对合法接收者的信息接收影响和窃听者的有用信息接收量，该文研究利用智能反射表面(IRS)来实现无线供电通信网络(WPCN) 中窃听端处的波束抵消。首先在传输能量的同时进行窃听检测，IRS根据合法用户的能量状态选择是否采取防窃听模式，然后在存在窃听的情况下，研究了窃听信道完美和不完美状态下系统的保密率最大化问题。分析表明，这一最大化问题是相移、功率分配、时间分配的多变量耦合非凸问题，可以采用分步优化、变量替换和S-Lemma等方法进行求解。仿真结果表明，与基准算法相比，所提算法提升了保密率，当智能反射表面元件数为80时保密率提升了44%，发射功率为40 dBm时保密率提升了34%。
- 无线供电通信网络 /
- 智能反射表面 /
- 保密率
Abstract: To reduce the influence of eavesdropper on the information reception of the legitimate receiver and the amount of useful information received by the eavesdropper, the beam cancellation at the eavesdropper in Wireless Powered Communication Network (WPCN)with Intelligent Reflecting Surface (IRS) is studied in this paper. Firstly, eavesdropping detection is carried out together with energy transmission, IRS chooses whether to adopt anti-eavesdropping mode according to the energy state of legitimate users. Then, under the conditions of eavesdropping, the maximization of system secrecy rate is studied for perfect and imperfect eavesdropping channel respectively. The maximization algorithm is a multi-variable coupling non-convex problem composing of phase shift and power distribution and time distribution, which is solved by methods such as stepwise optimization, variable substitution and S-Lemma. The simulation results show that, compared with the benchmark algorithm, the proposed algorithm improves the security rate. When the number of IRS elements is 80, the security rate is increased by 44%, and when the transmit power is 40 dBm, the security rate is increased by 34%.
- Wireless Power Communication Network (WPCN) /
- Intelligent Reflecting Surface (IRS) /
- Secrecy rate

HTML全文

图 1 IRS辅助WPCN的安全传输模型

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图 2 发射功率对保密率的影响

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图 3 发射功率对安全能效的影响

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图 4 反射元件数对保密率的影响

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图 5 反射元件数对安全能效的影响

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