A Note on the Secrecy Capacity of the Multi-antenna Wiretap Channel

Details A Note on the Secrecy Capacity of the Multi-antenna Wiretap Channel A Note on the Secrecy Capacity of the Multi-antenna Wiretap Channel

2007-10-22

arxiv.org/abs/0710.4105v1

Computer Science

Information Theory

10 pages, 0 figures

Scientific paper

Recently, the secrecy capacity of the multi-antenna wiretap channel was characterized by Khisti and Wornell [1] using a Sato-like argument. This note presents an alternative characterization using a channel enhancement argument. This characterization relies on an extremal entropy inequality recently proved in the context of multi-antenna broadcast channels, and is directly built on the physical intuition regarding to the optimal transmission strategy in this communication scenario.

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