论文标题
MIMO X通道的固定学位延迟CSIT
Secure Degrees-of-Freedom of the MIMO X Channel with Delayed CSIT
论文作者
论文摘要
在本文中，我们研究了带有机密消息和延迟CSIT的多输入多输出（MIMO）X通道的安全学位（SDOF）表征。特别是，我们提出了一个传输方案，该方案可以被视为最先进方案的概括，而无需安全性和延迟的CSIT。这种概括的关键是执行安全分析，通过该分析，我们得出了人造噪声传输阶段的最佳持续时间。结果，我们得出了sum-sdof下限。此外，我们揭示，如果固定的接收天线的数量是固定的，那么达到下限的最大发射天线的数量为$ \ frac {7+ \ sqrt {33}}} {8} {8} n $。
In this paper, we study the secure degrees-of-freedom (SDoF) characterization for the multiple-input multiple-output (MIMO) X channel with confidential messages and delayed CSIT. In particular, we propose a transmission scheme, which can be regarded as a generalization of the state-of-the-art scheme without security and with delayed CSIT. The key of this generalization is performing the security analysis, by which we derive the optimal duration of the artificial noise transmission phase. As a result, we derive the sum-SDoF lower bound. Furthermore, we reveal that if the number of receive antennas, denoted by N, is fixed, the minimum number of transmit antennas achieving the maximum of the lower bound is $\frac{7+\sqrt{33}}{8}N$.
