The MIMOME Channel

Details The MIMOME Channel The MIMOME Channel

2007-10-05

arxiv.org/abs/0710.1325v1

Computer Science

Information Theory

In Proceedings of the 45th Annual Allerton Conference on Communication, Control, and Computing, October 2007, 8 pages

Scientific paper

The MIMOME channel is a Gaussian wiretap channel in which the sender, receiver, and eavesdropper all have multiple antennas. We characterize the secrecy capacity as the saddle-value of a minimax problem. Among other implications, our result establishes that a Gaussian distribution maximizes the secrecy capacity characterization of Csisz{\'a}r and K{\"o}rner when applied to the MIMOME channel. We also determine a necessary and sufficient condition for the secrecy capacity to be zero. Large antenna array analysis of this condition reveals several useful insights into the conditions under which secure communication is possible.

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