MISO无线携能通信系统保密波束形成方法  

Secure beamforming method for the MISO SWIPT system

作　　者：方冰 韩冰 FANG Bing;HAN Bing(Army Command College of PLA,Nanjing 210045,China)

机构地区：[1]陆军指挥学院,江苏南京210045

出　　处：《系统工程与电子技术》2021年第6期1692-1698,共7页Systems Engineering and Electronics

基　　金：国家自然科学基金(71401177)资助课题。

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。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.

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 

分 类 号：TN911.7[电子电信—通信与信息系统]