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Intelligent Reflecting Surface (IRS)-Aided Covert Communication With Warden’s Statistical CSI
IEEE Wireless Communications Letters ( IF 6.3 ) Pub Date : 2021-03-30 , DOI: 10.1109/lwc.2021.3069778
Chaoyi Wu , Shihao Yan , Xiaobo Zhou , Riqing Chen , Jiande Sun

This work considers covert communications with the aid of an intelligent reflecting surface (IRS). We jointly design the transmit power and IRS’s reflection phase shifts and amplitudes to enhance covert communication performance. To this end, we first derive the total detection error rate at a warden. We then determine the IRS’s optimal phase shifts and develop an effective one-dimensional search method to identify the IRS’s optimal amplitudes. We show that the IRS can significantly improve the achievable covertness. In addition, optimizing the IRS’s amplitudes on top of its phase shifts significantly outperforms fixing them as unit in covert communications.

中文翻译:

智能反射面 (IRS) 辅助与典狱长统计 CSI 的隐蔽通信

这项工作考虑了借助智能反射面 (IRS) 进行的隐蔽通信。我们共同设计发射功率和 IRS 的反射相移和幅度,以提高隐蔽通信性能。为此,我们首先推导出典狱长的总检测错误率。然后我们确定 IRS 的最佳相移并开发一种有效的一维搜索方法来识别 IRS 的最佳幅度。我们表明 IRS 可以显着提高可实现的隐蔽性。此外,在其相移之上优化 IRS 的幅度明显优于将它们固定为秘密通信中的单元。
更新日期:2021-03-30
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