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首页> 外文会议>IEEE Conference on Communications and Network Security >Robust and secure beamformer design for MIMO relaying with imperfect eavesdropper CSI
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Robust and secure beamformer design for MIMO relaying with imperfect eavesdropper CSI

机译：具有不完美窃听​​者CSI的MIMO中继的稳健而可靠的波束成形器设计

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摘要

This paper presents a computationally efficient beamforming approach to combat wiretapping in a relay-based multiple-input multiple output (MIMO) communication system which is part of a cognitive radio (CR) network. The system operates in two stages, that is, multiple-access (MA) followed by broadcasting (BC) using physical layer network coding (PNC). The beamforming design is based on minimizing the mean square error (MSE) at the receiving node(s) while enforcing signal-to-interference-plus-noise ratio (SINR) constraints at the eavesdroppers. The constraints take into account uncertainty bounds on eavesdropper channel estimation errors. In each stage of communication, an optimization problem is devised and solved using an iterative procedure, considering two different types of eavesdropper functionality, i.e., selection combining and “blind” beamforming. Numerical results show the convergence of the MSE at the nodes and the SINR distributions at the eavesdroppers for both cases. Comparisons to previously suggested solutions for blind beamforming are also included showing improvements in MSE values in the MA stage and computational efficiency in both stages.
机译：本文提出了一种计算有效的波束形成方法，以应对基于中继的多输入多输出（MIMO）通信系统中的窃听，该系统是认知无线电（CR）网络的一部分。该系统分两个阶段运行，即多路访问（MA），然后是使用物理层网络编码（PNC）的广播（BC）。波束成形设计基于最小化接收节点处的均方误差（MSE），同时在窃听者处实施信号干扰加噪声比（SINR）约束。这些约束考虑了窃听者信道估计误差的不确定性范围。在通信的每个阶段，考虑到两种不同类型的窃听器功能，即选择组合和“盲”波束成形，使用迭代过程来设计和解决优化问题。数值结果表明，两种情况下，节点处的MSE都收敛，而窃听者处的SINR分布收敛。还包括与先前建议的盲波束形成解决方案进行比较，显示出MA阶段MSE值的改进以及两个阶段的计算效率。

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