MISO无线携能通信系统保密波束形成方法

doi:10.12305/j.issn.1001-506X.2021.06.29

摘要/Abstract

摘要：

为有效应对多输入单输出(multiple input single output, MISO)无线携能通信(simultaneous wireless information and power transfer，SWIPT)系统中的信息安全问题，提出人工噪声(artifical noise, AN)辅助的波束形成方案, 并进一步将这一问题表述为用户需求限制的功率控制问题。然而, 该问题具有典型的非凸复杂性, 其最优解无法在多项式时间内得到有效解决。为此，基于必要简化, 提出了双层优化算法来快速求取其次优解; 同时, 又进一步把该双层算法推广到非理想信道条件下, 构建了鲁棒波束形成方法。仿真实验表明，与经典迫零算法相比，双层算法具有更好的性能，且更具鲁棒性；而且，随着信道估计误差的增加，双层优化算法的优势更加明显。

关键词: 无线携能通信, 物理层安全, 波束形成, 半定规划, 鲁棒优化

Abstract:

To solve the information security issue in the multiple input single output (MISO) simultaneous wireless information and power transfer (SWIPT) system, an artificial noise (AN)-aided beamforming scheme is proposed, and further formulating the problem as a power control problem under user requirement constraint. However, this problem is of huge non-convex complexity and cannot be solved in polynomial time. Therefore, an efficient two-tier algorithm is developed for a sub-optimal solution, which is extended further to the imperfect channel conditions for a robust beamforming scheme. Simulation results show that the two-tier algorithm has better performance and more robustness when compared with the classic zero-forcing (ZF) algorithm, and the advantage of it is more obvious as the channel estimation error increases.

Key words: simultaneous wireless information and power transfer (SWIPT), physical layer security, beam forming, semi-definite programming (SDP), robust optimization

中图分类号:

TN911.7

方冰, 韩冰. MISO无线携能通信系统保密波束形成方法[J]. 系统工程与电子技术, 2021, 43(6): 1692-1698.

Bing FANG, Bing HAN. Secure beamforming method for the MISO SWIPT system[J]. Systems Engineering and Electronics, 2021, 43(6): 1692-1698.

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