标题： 通过利用同信道干扰提高无线物理层安全性 显示英文标题

标题： Improving Wireless Physical Layer Security via Exploiting Co-Channel Interference

摘要： 本文考虑了一个场景，其中源-目的对需要在外部窃听者存在的情况下建立保密连接，该连接由另一个交换公开信息的源-目的对产生的干扰协助。 目标是计算MIMO两用户窃听网络的最大可实现保密自由度（S.D.o.F）区域。 首先，提出了一种协作保密传输方案，其可行集被证明可以达到S.D.o.F.区域边界上的所有S.D.o.F.对。 这样，S.D.o.F.区域的确定被简化为在所提出的传输方案上最大化S.D.o.F.对的问题。 最大可实现的S.D.o.F.区域边界点以闭合形式获得，并提供了实现最大S.D.o.F.区域边界的预编码矩阵的构造方法。 获得的解析表达式清楚地显示了最大可实现的S.D.o.F.区域与每个终端天线数之间的关系。 显示英文摘要

摘要： This paper considers a scenario in which a source-destination pair needs to establish a confidential connection against an external eavesdropper, aided by the interference generated by another source-destination pair that exchanges public messages. The goal is to compute the maximum achievable secrecy degrees of freedom (S.D.o.F) region of a MIMO two-user wiretap network. First, a cooperative secrecy transmission scheme is proposed, whose feasible set is shown to achieve all S.D.o.F. pairs on the S.D.o.F. region boundary. In this way, the determination of the S.D.o.F. region is reduced to a problem of maximizing the S.D.o.F. pair over the proposed transmission scheme. The maximum achievable S.D.o.F. region boundary points are obtained in closed form, and the construction of the precoding matrices achieving the maximum S.D.o.F. region boundary is provided. The obtained analytical expressions clearly show the relation between the maximum achievable S.D.o.F. region and the number of antennas at each terminal.