论文标题
用于虚拟天线阵列的安全传输设计
Secure Transmission Design for Virtual Antenna Array-aided Device-to-device Multicast Communications
论文作者
论文摘要
本文研究了虚拟天线阵列（VAA）设备的物理层安全性 - 待机多播（D2DM）通信系统，在该系统中，缓存共同内容的用户设备（UES）将形成VAA系统并合作地将需要它的UES进行合作多播。具体而言，在多个窃听者的威胁下，在确保VAA辅助的D2DM通信的目标方面，我们通过共同考虑形成的VAA和基站（BS）提出了一个安全的光束形成方案。为了获得最佳的光束福音矢量，使用连续的凸近似（SCA）方法制定并求解非平滑和非covex权重总和最大化问题（WRMP）。此外，我们认为最坏的情况是，窃听者合作形成了窃听的VAA，以增强偷听的能力。在这种情况下，我们修改了固定边缘方案，制定相应的WRMP并使用两级优化解决。与常规D2DM方案相比，模拟结果验证了VAA ADED D2M方案的改进。
This paper investigates the physical-layer security in a Virtual Antenna Array (VAA)-aided Device- to-Device Multicast (D2DM) communication system, where the User Equipments (UEs) who cache the common content will form a VAA system and cooperatively multicast the content to UEs who desire it. Specifically, with the target of securing the VAA-aided D2DM communication under the threat of multiple eavesdroppers, we propose a secure beamforming scheme by jointly considering the formed VAA and the Base Station (BS). For obtaining the optimal beamforing vectors, a nonsmooth and nonconvex Weight Sum Rate Maximization Problem (WRMP) is formulated and solved using Successive Convex Approximation (SCA) approach. Furthermore, we consider the worst case that eavesdroppers cooperatively form a eavesdrop VAA to enhance the overhearing capacity. In this case, we modify the securing beamforming scheme, formulate the corresponding WRMP and solve it using a two-level optimization. Simulation results validate the improvements of the VAA-aided D2DM scheme in terms of communication security compared with conventional D2DM schemes.
