Robust Beamforming Design for SWIPT-Based Multi-Radio Wireless Mesh Network with Cooperative Jamming
Robust Beamforming Design for SWIPT-Based Multi-Radio Wireless Mesh Network with Cooperative Jamming
复制标题
基于 SWIPT 的具有协作干扰功能的多无线电无线网状网络的鲁棒波束成形设计
DOI：
10.3390/info11030138
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发表时间：
2020-03-01
期刊：
影响因子：
3.1
通讯作者：
Zhang，Lei
中科院分区：
文献类型：
--
作者：
Li，Liang;Zhao，Xiongwen;Zhang，Lei
无线网状网络（WMN）可以在智能城市、物联网（IoT）和设备到设备（D2 D）通信中提供灵活的无线连接。无线网状网的性能可以大大提高，通过采用多无线电技术，这使得一个节点可以与更多的节点同时进行通信。然而，多无线电WMN面临两个主要挑战，即能量消耗和物理层保密性。针对这两个问题，本文分别采用了同步无线信息和功率传输（SWIPT）技术和协同干扰技术。我们设计了SWIPT和合作干扰方案，通过适当地选择波束形成向量的WMN节点和干扰，以满足个人的信号干扰噪声比（SINR）和能量收集（EH）的约束，以最大限度地减少总发射功率。特别地，我们考虑了信道状态信息不完全所引起的信道估计误差。通过抑制窃听者的信干噪比来保护WMN节点的秘密性。由于问题的分数形式，证明了该问题是非凸的。我们开发了一个易于处理的算法，通过将其转化为一个凸的，利用半定规划（SDP）松弛和S-过程的方法。仿真结果验证了该算法与非鲁棒设计相比的有效性。
Wireless mesh networks (WMNs) can provide flexible wireless connections in a smart city, internet of things (IoT), and device-to-device (D2D) communications. The performance of WMNs can be greatly enhanced by adopting a multi-radio technique, which enables a node to communicate with more nodes simultaneously. However, multi-radio WMNs face two main challenges, namely, energy consumption and physical layer secrecy. In this paper, both simultaneous wireless information and power transfer (SWIPT) and cooperative jamming technologies were adopted to overcome these two problems. We designed the SWIPT and cooperative jamming scheme, minimizing the total transmission power by properly selecting beamforming vectors of the WMN nodes and jammer to satisfy the individual signal-to-interference-plus-noise ratio (SINR) and energy harvesting (EH) constrains. Especially, we considered the channel estimate error caused by the imperfect channel state information. The SINR of eavesdropper (Eve) was suppressed to protect the secrecy of WMN nodes. Due to the fractional form, the problem was proved to be non-convex. We developed a tractable algorithm by transforming it into a convex one, utilizing semi-definite programming (SDP) relaxation and S-procedure methods. The simulation results validated the effectiveness of the proposed algorithm compared with the non-robust design.