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GLOBECOM
2009
IEEE

Gaussian MIMO Multi-Receiver Wiretap Channel

9 years 6 months ago
Gaussian MIMO Multi-Receiver Wiretap Channel
Abstract— We consider the Gaussian multiple-input multipleoutput (MIMO) multi-receiver wiretap channel, and derive the secrecy capacity region of this channel for the most general case. We first prove the secrecy capacity region of the degraded MIMO channel, in which all receivers have the same number of antennas, and the noise covariance matrices exhibit a positive semi-definite order. We then generalize this result to the aligned case, in which all receivers have the same number of antennas, however there is no order among the noise covariance matrices. We accomplish this task by using the channel enhancement technique. Finally, we find the secrecy capacity region of the general MIMO channel by using some limiting arguments on the secrecy capacity region of the aligned MIMO channel. We show that a variant of dirtypaper coding with Gaussian signals is optimal.
Ersen Ekrem, Sennur Ulukus
Added 21 May 2010
Updated 21 May 2010
Type Conference
Year 2009
Where GLOBECOM
Authors Ersen Ekrem, Sennur Ulukus
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