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首页> 外文期刊>IEEE communications letters >Secure Multiuser MIMO Downlink Transmission Via Precoding-Aided Spatial Modulation
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Secure Multiuser MIMO Downlink Transmission Via Precoding-Aided Spatial Modulation

机译:通过预编码辅助空间调制的安全多用户MIMO下行链路传输

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摘要

This letter generalizes the precoding-aided spatial modulation (PSM) to a multiuser (MU) downlink scenario. With precoding vectors elaborately designed, a proposed MU-PSM scheme has the capability to resist a multiple antenna eavesdropper. Specifically, signal precoding matrices (SPMs) are designed to cancel the MU interference and modulate partial information bits on the indices of receive antennas. To improve physical layer security, scrambling on SPMs is conceived to construct a fast-varying precoding matrix, which contributes to the degradation at Eve’s blind estimation and detection. Moreover, issues of detection algorithms and a lower bound of secrecy rate are addressed to verify security enhancement in the proposed scheme.
机译:这封信将预编码辅助空间调制(PSM)概括为多用户(MU)下行链路方案。通过精心设计的预编码矢量,提出的MU-PSM方案具有抵抗多天线窃听者的能力。具体而言,信号预编码矩阵(SPM)被设计为消除MU干扰并在接收天线的索引上调制部分信息比特。为了提高物理层的安全性,设想对SPM进行加扰以构造一个快速变化的预编码矩阵,该矩阵会导致夏娃(Eve)盲目估计和检测的性能下降。此外,解决了检测算法和保密率下限的问题,以验证所提出方案中的安全性增强。

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