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arXiv 1107.5541cs.ITmath.IT
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MIMO双发送端窃听信道的封闭式秘密容量

Closed Form Secrecy Capacity of MIMO Wiretap Channels with Two Transmit Antennas

Jiangyuan Li, Athina Petropulu

摘要:

高斯多输入多输出(MIMO)窃听信道模型。输入端是一个双天线发射器,而输出端是合法的接收器和窃听器,两者都配备了多个天线。假设所有信道都是已知的。在功率约束条件下,得到了满足保密容量的最优输入协方差矩阵,并给出了保密容量的封闭表达式。

英文摘要:

A Gaussian multiple-input multiple-output (MIMO) wiretap channel model is considered. The input is a two-antenna transmitter, while the outputs are the legitimate receiver and an eavesdropper, both equipped with multiple antennas. All channels are assumed to be known. The problem of obtaining the optimal input covariance matrix that achieves secrecy capacity subject to a power constraint is addressed, and a closed-form expression for the secrecy capacity is obtained.

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