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On the secure Degrees of Freedom for the K-user symmetric MIMO Wiretap MAC channel

机译:关于K用户对称MIMO窃听MAC信道的安全自由度

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We derive an upper bound for the sum secure Degrees of Freedom (sDoF) for the symmetric K-user MIMO Wiretap Multiple Access channel with full channel state information at transmitters (CSIT) but without the knowledge of eavesdroppers channel state information (CSI). We consider the symmetric case with K transmitters each equipped with M antennas, a base station with N antennas and an unknown number of eavesdroppers. Without assuming knowledge of the number (or location) of eavesdroppers, we assume that each eavesdropper has a maximum of Ne antennas. The sum sDoF is shown to be upper bounded by Ds = min(max(M, N) - Ne/K, K M - Ne, N). Achievable schemes utilizing cooperative artificial noise transmission and zero-forcing decorrelators are shown to achieve the upper bound for a wide range of values of N/M.
机译:我们为对称k用户MIMO WireTAP多通道状态信息(CSIT)提供了对对称K用户MIMO WireTAP多通道状态信息但没有对窃听者频道状态信息(CSI)的知识的完全信道状态信息的大界的上限我们考虑用K发射器的对称情况,每个k发射器配备有M天线,一个带有n天线的基站和未知数量的窃听者。不假设窃听者的数量(或位置)的知识,我们假设每个窃听者都有最多的NE天线。 SUM SDOF显示为DS = MIN的上限(MAX(M,N) - NE / K,K M - NE,N)。利用协作人工噪声传输和零强制去序器的可实现方案被示出为宽范围的n / m值来实现上限。

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