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2008
IEEE

Diversity-multiplexing tradeoff for the multiple-antenna wire-tap channel

9 years 4 months ago
Diversity-multiplexing tradeoff for the multiple-antenna wire-tap channel
In this paper the fading multiple antenna (MIMO) wire-tap channel is investigated under short term power constraints. The secret diversity gain and the secret multiplexing gain are defined. Using these definitions, the secret diversity-multiplexing tradeoff (DMT) is calculated analytically for no transmitter side channel state information (CSI) and for full CSI. When there is no CSI at the transmitter, under the assumption of Gaussian codebooks, it is shown that the eavesdropper steals degrees of freedom from the source-destination channel, and the secret DMT depends on the remaining degrees of freedom. When CSI is available at the transmitter (CSIT), the eavesdropper steals transmitter antennas, but not the degrees of freedom of the source-destination channel. This dependence on the availability of CSI is unlike the DMT results without secrecy constraints, where the DMT remains the same for no CSI and full CSI at the transmitter under short term power constraints. A zero-forcing ty...
Melda Yuksel, Elza Erkip
Added 29 May 2010
Updated 29 May 2010
Type Conference
Year 2008
Where CISS
Authors Melda Yuksel, Elza Erkip
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